ALIASES:

Program:Win32/Pameseg.AA (Microsoft); Trojan.Win32.Generic!BT (Sunbelt); Gen:Variant.Kazy.55053 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size: 6,832,640 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 09 May 2012

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan creates the following folders:

  • %Application Data%\Mail.Ru
  • %Program Files%\Mail.Ru
  • %Program Files%\Mail.Ru\Sputnik
  • %Program Files%\Mail.Ru\Guard
  • %User Profile%\Application Data\{DCD48218-E972-4d0c-9E5F-43462BC13E3B}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Guard.Mail.ru.gui = "%Program Files%\Mail.Ru\Guard\GuardMailRu.exe /gui"

It registers itself as a BHO to ensure its automatic execution every time Internet Explorer is used by adding the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Browser Helper Objects\{8984B388-A5BB-4DF7-B274-77B879E179DB}

Other System Modifications

This Trojan deletes the following files:

  • 1eeade6492b4bd7edc65def3eda2fbe01.exe
  • %User Profile%\{DCD48218-E972-4d0c-9E5F-43462BC13E3B}\{9BED5EE2-0547-4706-8600-D3897629ADE0}

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

It adds the following registry keys:

HKEY_CURRENT_USER\MailRuSputnik.MailRuBHO

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MailRuSputnik.MailRuBHO\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MailRuSputnik.MailRuBHO\CurVer

HKEY_CURRENT_USER\MailRuSputnik.MailRuBHO.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MailRuSputnik.MailRuBHO.1\CLSID

HKEY_CURRENT_USER\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\InprocServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\VersionIndependentProgID

HKEY_CURRENT_USER\MailRu.MailRuSputnikObj

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MailRu.MailRuSputnikObj\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MailRu.MailRuSputnikObj\CurVer

HKEY_CURRENT_USER\MailRu.MailRuSputnikObj.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
MailRu.MailRuSputnikObj.1\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\VersionIndependentProgID

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{D95CDA79-46E7-47F8-9437-FFC28CD66618}

HKEY_LOCAL_MACHINE\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\{BFD1C493-BE73-4660-9924-7C23CF34C11D}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\SputnikHelper.EXE

HKEY_CLASSES_ROOT\SputnikHelper.SputnikHelperObj.1

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
SputnikHelper.SputnikHelperObj.1\CLSID

HKEY_CLASSES_ROOT\SputnikHelper.SputnikHelperObj

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
SputnikHelper.SputnikHelperObj\CLSID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
SputnikHelper.SputnikHelperObj\CurVer

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}\ProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}\VersionIndependentProgID

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}\Programmable

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}\LocalServer32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0\
FLAGS

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0\
0

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0\
0\win32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0\
HELPDIR

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}\ProxyStubClsid

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}\ProxyStubClsid32

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}\TypeLib

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Guard.Mail.ru

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings

HKEY_LOCAL_MACHINE\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy

HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru

HKEY_LOCAL_MACHINE\Software\Mail.Ru\
Guard

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}

HKEY_CLASSES_ROOT\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\
InprocServer32

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
GUID = "{B656221D-C6AD-4423-9536-B76019936CBC}"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
DisplayName = "mail.ru: ????? ? ?????????"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
URL = "http://go.{BLOCKED}l.ru/search?q={searchTerms}&utf8in=1&fr=ietb"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
FaviconURLFallback = "http://go.{BLOCKED}l.ru/favicon.ico"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
ShowSearchSuggestions = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
SuggestionsURL = "http://suggests.{BLOCKED}o.mail.ru/ie8?q={searchTerms}"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\SearchScopes
DefaultScope = "{E88E0043-C9D4-4e33-8555-FEE4F5B63060}"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
Layout_ID = "6"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Toolbar
{09900DE8-1DCA-443F-9243-26FF581438AF} = "???????@Mail.Ru"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\URLSearchHooks
{09900DE8-1DCA-443F-9243-26FF581438AF} = "???????@Mail.Ru"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\InprocServer32
ThreadingModel = "Apartment"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\InprocServer32
ThreadingModel = "Apartment"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{D95CDA79-46E7-47F8-9437-FFC28CD66618}
AppName = "SputnikHelper.exe"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{D95CDA79-46E7-47F8-9437-FFC28CD66618}
AppPath = "%Program Files%\Mail.Ru\Sputnik"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{D95CDA79-46E7-47F8-9437-FFC28CD66618}
Policy = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
AppName = "SputnikHelper.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
AppPath = "%Program Files%\Mail.Ru\Sputnik"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\Low Rights\ElevationPolicy\
{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
Policy = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
UninstallString = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
DisplayName = "Mail.Ru ??????? 2.4.0.496"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
Publisher = "Mail.Ru"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
DisplayIcon = "%Program Files%\Mail.Ru\Sputnik\1eeade6492b4bd7edc65def3eda2fbe02.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
InstallLocation = "%Program Files%\Mail.Ru\Sputnik"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
VersionMajor = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
MailRuSputnik
VersionMinor = "4"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
NEW = "1"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
RFR = "openpr"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
partner_new_url = "{random characters}"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
new_sig = "2cb47b800410e02e1413fee846e0c169"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar
LiteMode = "0"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
FastLinks = "3d"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
ViewSettings = "2b"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
SearchSettings = "2"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
HistorySize = "32"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
UseMailto = "1"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
EnableMusic = "1"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
KeepHistory = "1"

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar\Settings
AppendOnNavigateError = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
AppID\SputnikHelper.EXE
AppID = "{BFD1C493-BE73-4660-9924-7C23CF34C11D}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}\TypeLib
Version = "1.0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Program Files%\Mail.Ru\Sputnik\SputnikHelper.exe = "{random characters}"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%Program Files%\Mail.Ru\Sputnik\SputnikFlashPlayer.exe = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru\
Guard
Language = "ru"

HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru\
Guard
UserGUID = "{B656221D-C6AD-4423-9536-B76019936CBC}"

HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru
GuardNEW = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Guard.Mail.ru
DisplayIcon = "%Program Files%\Mail.Ru\Guard\GuardMailRu.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Guard.Mail.ru
DisplayName = "Guard.Mail.ru"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Guard.Mail.ru
Publisher = "Mail.ru"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Guard.Mail.ru
UninstallString = "%Program Files%\Mail.Ru\Guard\GuardMailRu.exe /uninstall"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Start Page = "http://www.{BLOCKED}l.ru/cnt/9516"

(Note: The default value data of the said registry entry is http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome.)

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Toolbar\WebBrowser
ITBarLayout = "{random values}"

(Note: The default value data of the said registry entry is {random values}.)

It deletes the following registry keys:

HKEY_CURRENT_USER\Software\Mail.Ru\
IE_Bar

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\51c767e0d4d715516cd3782757928fd6.exe
  • %User Temp%\installer3220888350.tmp
  • %User Temp%\1eeade6492b4bd7edc65def3eda2fbe01.exe
  • %User Temp%\1eeade6492b4bd7edc65def3eda2fbe02.exe
  • %User Temp%\1eeade6492b4bd7edc65def3eda2fbe0.html
  • %User Temp%\7A8747450FCE4898889721DA1585676A.html
  • %Favorites%\Mail.Ru.url
  • %Favorites%\Mail.Ru ????? - ????????? ??? ???????!.url
  • %Application Data%\Mail.Ru\GoMailRu.ico
  • %Desktop%\?????? ? ?????????.url
  • %Program Files%\Mail.Ru\Sputnik\MailRuSputnik.dll
  • %Program Files%\Mail.Ru\Sputnik\SputnikHelper.exe
  • %Program Files%\Mail.Ru\Sputnik\SputnikFlashPlayer.exe
  • %User Temp%\GuardMailRu.exe
  • %Program Files%\Mail.Ru\Guard\GuardMailRu.exe
  • %Program Files%\Mail.Ru\Sputnik\1eeade6492b4bd7edc65def3eda2fbe02.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Favorites% is the current user's Favorites folder, which is usually C:\Windows\Favorites on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Favorites on Windows NT, and C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

Close all opened browser windows

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar
    • Settings
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Low Rights
    • ElevationPolicy
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Low Rights
    • ElevationPolicy
  • In HKEY_LOCAL_MACHINE\SOFTWARE
    • Mail.Ru
  • In HKEY_LOCAL_MACHINE\Software\Mail.Ru
    • Guard
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
    • {E88E0043-C9D4-4e33-8555-FEE4F5B63060}
  • In HKEY_CLASSES_ROOT\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}
    • InprocServer32
  • In HKEY_CURRENT_USER
    • MailRuSputnik.MailRuBHO
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MailRuSputnik.MailRuBHO
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MailRuSputnik.MailRuBHO
    • CurVer
  • In HKEY_CURRENT_USER
    • MailRuSputnik.MailRuBHO.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MailRuSputnik.MailRuBHO.1
    • CLSID
  • In HKEY_CURRENT_USER\CLSID
    • {8984B388-A5BB-4DF7-B274-77B879E179DB}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}
    • InprocServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}
    • VersionIndependentProgID
  • In HKEY_CURRENT_USER
    • MailRu.MailRuSputnikObj
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MailRu.MailRuSputnikObj
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MailRu.MailRuSputnikObj
    • CurVer
  • In HKEY_CURRENT_USER
    • MailRu.MailRuSputnikObj.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\MailRu.MailRuSputnikObj.1
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}
    • VersionIndependentProgID
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Low Rights\ElevationPolicy
    • {D95CDA79-46E7-47F8-9437-FFC28CD66618}
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\Low Rights\ElevationPolicy
    • {F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • MailRuSputnik
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
    • {BFD1C493-BE73-4660-9924-7C23CF34C11D}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID
    • SputnikHelper.EXE
  • In HKEY_CLASSES_ROOT
    • SputnikHelper.SputnikHelperObj.1
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SputnikHelper.SputnikHelperObj.1
    • CLSID
  • In HKEY_CLASSES_ROOT
    • SputnikHelper.SputnikHelperObj
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SputnikHelper.SputnikHelperObj
    • CLSID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\SputnikHelper.SputnikHelperObj
    • CurVer
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID
    • {D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}
    • ProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}
    • VersionIndependentProgID
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}
    • Programmable
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}
    • LocalServer32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{D2D4C0D4-2E88-40D0-A0DB-B8F9AC388529}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib
    • {A6024453-8AD2-4424-8C4E-AB8BDE5506B9}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}
    • 1.0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0
    • FLAGS
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0
    • 0
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0\0
    • win32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{A6024453-8AD2-4424-8C4E-AB8BDE5506B9}\1.0
    • HELPDIR
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface
    • {2D1384D8-DA46-44FF-8E24-2049552FF9D7}
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}
    • ProxyStubClsid
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}
    • ProxyStubClsid32
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}
    • TypeLib
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • Guard.Mail.ru

Step 5

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Guard.Mail.ru.gui = "%Program Files%\Mail.Ru\Guard\GuardMailRu.exe /gui"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • GUID = "{B656221D-C6AD-4423-9536-B76019936CBC}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
    • DisplayName = "mail.ru: ????? ? ?????????"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
    • URL = "http://go.{BLOCKED}l.ru/search?q={searchTerms}&utf8in=1&fr=ietb"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
    • FaviconURLFallback = "http://go.{BLOCKED}l.ru/favicon.ico"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
    • ShowSearchSuggestions = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes\{E88E0043-C9D4-4e33-8555-FEE4F5B63060}
    • SuggestionsURL = "http://suggests.{BLOCKED}o.mail.ru/ie8?q={searchTerms}"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchScopes
    • DefaultScope = "{E88E0043-C9D4-4e33-8555-FEE4F5B63060}"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • Layout_ID = "6"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Toolbar
    • {09900DE8-1DCA-443F-9243-26FF581438AF} = "???????@Mail.Ru"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\URLSearchHooks
    • {09900DE8-1DCA-443F-9243-26FF581438AF} = "???????@Mail.Ru"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{8984B388-A5BB-4DF7-B274-77B879E179DB}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{09900DE8-1DCA-443F-9243-26FF581438AF}\InprocServer32
    • ThreadingModel = "Apartment"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{D95CDA79-46E7-47F8-9437-FFC28CD66618}
    • AppName = "SputnikHelper.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{D95CDA79-46E7-47F8-9437-FFC28CD66618}
    • AppPath = "%Program Files%\Mail.Ru\Sputnik"
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{D95CDA79-46E7-47F8-9437-FFC28CD66618}
    • Policy = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
    • AppName = "SputnikHelper.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
    • AppPath = "%Program Files%\Mail.Ru\Sputnik"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{F83D6D4E-773E-4DD7-AA92-4CD4FCF35CDC}
    • Policy = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • UninstallString = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • DisplayName = "Mail.Ru ??????? 2.4.0.496"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • Publisher = "Mail.Ru"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • DisplayIcon = "%Program Files%\Mail.Ru\Sputnik\1eeade6492b4bd7edc65def3eda2fbe02.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • InstallLocation = "%Program Files%\Mail.Ru\Sputnik"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • VersionMajor = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MailRuSputnik
    • VersionMinor = "4"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • NEW = "1"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • RFR = "openpr"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • partner_new_url = "{random characters}"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • new_sig = "2cb47b800410e02e1413fee846e0c169"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar
    • LiteMode = "0"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • FastLinks = "3d"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • ViewSettings = "2b"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • SearchSettings = "2"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • HistorySize = "32"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • UseMailto = "1"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • EnableMusic = "1"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • KeepHistory = "1"
  • In HKEY_CURRENT_USER\Software\Mail.Ru\IE_Bar\Settings
    • AppendOnNavigateError = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\SputnikHelper.EXE
    • AppID = "{BFD1C493-BE73-4660-9924-7C23CF34C11D}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{2D1384D8-DA46-44FF-8E24-2049552FF9D7}\TypeLib
    • Version = "1.0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • %Program Files%\Mail.Ru\Sputnik\SputnikHelper.exe = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • %Program Files%\Mail.Ru\Sputnik\SputnikFlashPlayer.exe = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru\Guard
    • Language = "ru"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru\Guard
    • UserGUID = "{B656221D-C6AD-4423-9536-B76019936CBC}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Mail.Ru
    • GuardNEW = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Guard.Mail.ru
    • DisplayIcon = "%Program Files%\Mail.Ru\Guard\GuardMailRu.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Guard.Mail.ru
    • DisplayName = "Guard.Mail.ru"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Guard.Mail.ru
    • Publisher = "Mail.ru"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Guard.Mail.ru
    • UninstallString = "%Program Files%\Mail.Ru\Guard\GuardMailRu.exe /uninstall"

Step 6

Restore this modified registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main
    • From: Start Page = "http://www.{BLOCKED}l.ru/cnt/9516"
      To: Start Page = ""http://www.microsoft.com/isapi/redir.dll?prd=ie&pver=6&ar=msnhome""
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\WebBrowser
    • From: ITBarLayout = "{random values}"
      To: ITBarLayout = ""{random values}""

Step 7

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\51c767e0d4d715516cd3782757928fd6.exe
  • %User Temp%\installer3220888350.tmp
  • %User Temp%\1eeade6492b4bd7edc65def3eda2fbe01.exe
  • %User Temp%\1eeade6492b4bd7edc65def3eda2fbe02.exe
  • %User Temp%\1eeade6492b4bd7edc65def3eda2fbe0.html
  • %User Temp%\7A8747450FCE4898889721DA1585676A.html
  • %Favorites%\Mail.Ru.url
  • %Favorites%\Mail.Ru ????? - ????????? ??? ???????!.url
  • %Application Data%\Mail.Ru\GoMailRu.ico
  • %Desktop%\?????? ? ?????????.url
  • %Program Files%\Mail.Ru\Sputnik\MailRuSputnik.dll
  • %Program Files%\Mail.Ru\Sputnik\SputnikHelper.exe
  • %Program Files%\Mail.Ru\Sputnik\SputnikFlashPlayer.exe
  • %User Temp%\GuardMailRu.exe
  • %Program Files%\Mail.Ru\Guard\GuardMailRu.exe
  • %Program Files%\Mail.Ru\Sputnik\1eeade6492b4bd7edc65def3eda2fbe02.exe

Step 8

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Application Data%\Mail.Ru
  • %Program Files%\Mail.Ru
  • %Program Files%\Mail.Ru\Sputnik
  • %Program Files%\Mail.Ru\Guard
  • %User Profile%\Application Data\{DCD48218-E972-4d0c-9E5F-43462BC13E3B}

Step 9

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FAKEAV.USBE07AVC. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 10

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • 1eeade6492b4bd7edc65def3eda2fbe01.exe
  • %User Profile%\{DCD48218-E972-4d0c-9E5F-43462BC13E3B}\{9BED5EE2-0547-4706-8600-D3897629ADE0}

Step 11

Restore these deleted registry keys/values from backup

*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.

  • In HKEY_CURRENT_USER\Software\Mail.Ru
    • IE_Bar


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