TROJ_KRYPTIK.KJO
Rogue:Win32/FakeRean (Microsoft); Generic FakeAlert.io (McAfee); Trojan.Gen (Symantec); PAK:UPX, Trojan-FakeAV.Win32.SecurityCenter.da (Kaspersky); FraudTool.Win32.FakeRean (Sunbelt); Trojan.Generic.KD.516669 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
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
4,537,859 bytes
EXE
Yes
02 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 drops the following copies of itself into the affected system:
- %User Profile%\Security Monitor\securityhelper.exe
(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 creates the following folders:
- %Start Menu%\Programs\Security Monitor
- %User Profile%\Application Data\Security Monitor
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %Application Data%\advMaindlg
(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %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.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
98fvq9usfw47 = "{malware path and file name}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Security Monitor 2012 Security = "%User Profile%\Security Monitor\securitymanager.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
CRLMappnp = "rundll32.exe %Application Data%\advMaindlg\CRLMappnp.dll,msapidrm sysPaddsc"
Other System Modifications
This Trojan deletes the following files:
- {malware path and file name}:zone.identifier
- %User Profile%\Security Monitor\securityhelper.exe
- %User Temp%\nsj2.tmp
(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.. %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.)
It adds the following registry keys:
HKEY_CURRENT_USER\Software\Classes\
CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\Categories
It adds the following registry entries:
HKEY_CURRENT_USER\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\
Categories
{66CC2F6C-45CE-7F9C-B4D6-C937CE459C7F} = "4i4IjpFqelNArtSWplvkZb"
HKEY_CURRENT_USER\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\
Categories
{526A2876-0C0F-0475-0FC7-EEA9FB98BC58} = "1326920400"
HKEY_CURRENT_USER\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\
Categories
{134E12A4-6E89-F6A5-894D-790405ECD299} = "368589"
Dropping Routine
This Trojan drops the following files:
- %User Temp%\_1.tmpac7d.exe
- %Start Menu%\Programs\Security Monitor.lnk
- %Desktop%\Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\Activate Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\How to Activate Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\Help Security Monitor.lnk
- %User Profile%\Quick Launch\Security Monitor.lnk
- %User Profile%\Security Monitor\IcoActivate.ico
- %User Profile%\Security Monitor\IcoHelp.ico
- %User Profile%\Security Monitor\IcoUninstall.ico
- %User Profile%\Security Monitor\123.exe
- %User Profile%\Security Monitor\securitymanager.exe
- %User Profile%\Security Monitor\Security_Monitor2012.exe
- %User Temp%\nsz3.tmp
- %User Temp%\xpmapSvcs.dll
- %Application Data%\advMaindlg\CRLMappnp.dll
(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.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu 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.. %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.. %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.)
This report is generated via an automated analysis system.
SOLUTION
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
Step 3
Delete this registry key
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\Classes\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}
- Categories
Step 4
Delete this registry value
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\Windows\CurrentVersion\Run
- 98fvq9usfw47 = "{malware path and file name}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Security Monitor 2012 Security = "%User Profile%\Security Monitor\securitymanager.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- CRLMappnp = "rundll32.exe %Application Data%\advMaindlg\CRLMappnp.dll,msapidrm sysPaddsc"
- In HKEY_CURRENT_USER\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\Categories
- {66CC2F6C-45CE-7F9C-B4D6-C937CE459C7F} = "4i4IjpFqelNArtSWplvkZb"
- In HKEY_CURRENT_USER\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\Categories
- {526A2876-0C0F-0475-0FC7-EEA9FB98BC58} = "1326920400"
- In HKEY_CURRENT_USER\CLSID\{293342E5-B5F0-74DA-B16C-611CF0B5DA74}\Categories
- {134E12A4-6E89-F6A5-894D-790405ECD299} = "368589"
Step 5
Search and delete these files
- %User Temp%\_1.tmpac7d.exe
- %Start Menu%\Programs\Security Monitor.lnk
- %Desktop%\Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\Activate Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\How to Activate Security Monitor.lnk
- %Start Menu%\Programs\Security Monitor\Help Security Monitor.lnk
- %User Profile%\Quick Launch\Security Monitor.lnk
- %User Profile%\Security Monitor\IcoActivate.ico
- %User Profile%\Security Monitor\IcoHelp.ico
- %User Profile%\Security Monitor\IcoUninstall.ico
- %User Profile%\Security Monitor\123.exe
- %User Profile%\Security Monitor\securitymanager.exe
- %User Profile%\Security Monitor\Security_Monitor2012.exe
- %User Temp%\nsz3.tmp
- %User Temp%\xpmapSvcs.dll
- %Application Data%\advMaindlg\CRLMappnp.dll
Step 6
Search and delete these folders
- %Start Menu%\Programs\Security Monitor
- %User Profile%\Application Data\Security Monitor
- %System Root%\DOCUME~1
- %System Root%\DOCUME~1\Wilbert
- %User Profile%\LOCALS~1
- %Application Data%\advMaindlg
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_KRYPTIK.KJO. 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 8
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.
- {malware path and file name}:zone.identifier
- %User Profile%\Security Monitor\securityhelper.exe
- %User Temp%\nsj2.tmp
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