HKTL_SERVROM


 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This hacking tool 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:

2,710,579 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

23 Feb 2016

Arrival Details

This hacking tool 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 hacking tool creates the following folders:

  • %User Temp%\$inst
  • %User Profile%\Application Data\yandex

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Other System Modifications

This hacking tool deletes the following files:

  • %User Temp%\$inst\0.tmp
  • %User Temp%\$inst\1.tmp
  • %User Temp%\$inst\3.tmp
  • %User Temp%\$inst\4.tmp
  • %User Temp%\$inst\5.tmp
  • %User Temp%\$inst\6.tmp
  • %User Temp%\$inst\7.tmp
  • %User Temp%\$inst\8.tmp
  • %User Temp%\$inst\9.tmp
  • %User Temp%\$inst\10.tmp
  • %User Temp%\$inst\11.tmp
  • %User Temp%\$inst\12.tmp
  • %User Temp%\$inst\13.tmp
  • %User Temp%\$inst\14.tmp
  • %User Temp%\$inst\15.tmp
  • %User Temp%\$inst\16.tmp
  • %User Temp%\$inst\17.tmp
  • %User Temp%\$inst\20.tmp
  • %User Temp%\$inst\50.tmp
  • %User Temp%\$inst\21.tmp
  • %User Temp%\$inst\51.tmp
  • %User Profile%\yandex\578588~1.BAT

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\AppCompat

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify

HKEY_LOCAL_MACHINE\SOFTWARE\LiteManagerTeam\
LiteManager\v3.4\Config

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\
Microsoft\Windows\AppCompat
DisablePCA = "1"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
FUSClientPath = "%System Root%\Users\PATRON\Desktop\âàñÿ\ROMFUSClient.exe"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
NoIPSettings = "{random values}"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
ROMCalendarRecordSettings = "{random values}"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
Options = "{random values}"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
Pwd = "{random values}"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
CallbackSettings = "{random values}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
DisplayVersion = "3.40"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
VersionMajor = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
VersionMinor = "28"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
Publisher = "Company"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
URLInfoAbout = "http://www.{BLOCKED}y.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
HelpLink = "mailto:support@{BLOCKED}y.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
InstallLocation = "%User Profile%\Application Data"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
InstallDate = "20160205"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
Language = "419"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
EstimatedSize = "1d44"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify
Asynchronous = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify
Impersonate = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify
DllName = "ROMwln.dll"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify
Logoff = "WLEventLogoff"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify
Logon = "WLEventLogon"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon\
Notify\ROMwlnotify
Startup = "WLEventStartup"

HKEY_LOCAL_MACHINE\SOFTWARE\LiteManagerTeam\
LiteManager\v3.4\Config
ServerExe = "%User Profile%\yandex\ROMServer.exe"

HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\
v3.4\Server\Parameters
FUSClientPath = "%User Profile%\yandex\ROMFUSClient.exe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Terminal Server\SysProcs
ROMFUSClient.exe = "0"

Dropping Routine

This hacking tool drops the following files:

  • %User Temp%\$inst\2.tmp
  • %User Temp%\$inst\temp_0.tmp
  • %System%\ROMwln.dll

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

Other Details

This hacking tool connects to the following possibly malicious URL:

  • {BLOCKED}.101.61
  • {BLOCKED}.239.151

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.8

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

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_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows
    • AppCompat
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server
    • Parameters
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify
    • ROMwlnotify
  • In HKEY_LOCAL_MACHINE\SOFTWARE\LiteManagerTeam\LiteManager\v3.4
    • Config

Step 3

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\Policies\Microsoft\Windows\AppCompat
    • DisablePCA = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • FUSClientPath = "%System Root%\Users\PATRON\Desktop\âàñÿ\ROMFUSClient.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • NoIPSettings = "{random values}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • ROMCalendarRecordSettings = "{random values}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • Options = "{random values}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • Pwd = "{random values}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • CallbackSettings = "{random values}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • DisplayVersion = "3.40"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • VersionMajor = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • VersionMinor = "28"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • Publisher = "Company"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • URLInfoAbout = "http://www.{BLOCKED}y.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • HelpLink = "mailto:support@{BLOCKED}y.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • InstallLocation = "%User Profile%\Application Data"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • InstallDate = "20160205"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • Language = "419"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • EstimatedSize = "1d44"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ROMwlnotify
    • Asynchronous = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ROMwlnotify
    • Impersonate = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ROMwlnotify
    • DllName = "ROMwln.dll"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ROMwlnotify
    • Logoff = "WLEventLogoff"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ROMwlnotify
    • Logon = "WLEventLogon"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\ROMwlnotify
    • Startup = "WLEventStartup"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\LiteManagerTeam\LiteManager\v3.4\Config
    • ServerExe = "%User Profile%\yandex\ROMServer.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\LiteManager\v3.4\Server\Parameters
    • FUSClientPath = "%User Profile%\yandex\ROMFUSClient.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Terminal Server\SysProcs
    • ROMFUSClient.exe = "0"

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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%\$inst\2.tmp
  • %User Temp%\$inst\temp_0.tmp
  • %System%\ROMwln.dll

Step 5

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.
  • %User Temp%\$inst
  • %User Profile%\Application Data\yandex

Step 6

Scan your computer with your Trend Micro product to delete files detected as HKTL_SERVROM. 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 7

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.

  • %User Temp%\$inst\0.tmp
  • %User Temp%\$inst\1.tmp
  • %User Temp%\$inst\3.tmp
  • %User Temp%\$inst\4.tmp
  • %User Temp%\$inst\5.tmp
  • %User Temp%\$inst\6.tmp
  • %User Temp%\$inst\7.tmp
  • %User Temp%\$inst\8.tmp
  • %User Temp%\$inst\9.tmp
  • %User Temp%\$inst\10.tmp
  • %User Temp%\$inst\11.tmp
  • %User Temp%\$inst\12.tmp
  • %User Temp%\$inst\13.tmp
  • %User Temp%\$inst\14.tmp
  • %User Temp%\$inst\15.tmp
  • %User Temp%\$inst\16.tmp
  • %User Temp%\$inst\17.tmp
  • %User Temp%\$inst\20.tmp
  • %User Temp%\$inst\50.tmp
  • %User Temp%\$inst\21.tmp
  • %User Temp%\$inst\51.tmp
  • %User Profile%\yandex\578588~1.BAT


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