TROJ_AGENT_022006.TOMB
Rogue:Win32/FakeVimes, Rogue:Win32/FakeVimes (Microsoft); FakeAlert-KS.gen.aa (McAfee); SmartAVFraud!gen2 (Symantec); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.7454954 (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
144,389 bytes
EXE
Yes
29 Jun 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:
- %System Root%\hy{malware file name}\{malware file name}
- %User Temp%\{malware file name}
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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 creates the following folders:
- %System Root%\hy{malware file name}
- %User Profile%\Application Data\8ad2db
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
APCS = "%User Temp%\{malware file name} /cs:0 "
Other System Modifications
This Trojan deletes the following files:
- %System Root%\hy{malware file name}\{malware file name}
- %User Temp%\{malware file name}
- %User Profile%\8ad2db\AP8AD_~1.EXE
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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.. %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\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
Dropping Routine
This Trojan drops the following files:
- %User Profile%\8ad2db\AntimalwarePCS.exe
- %User Profile%\8ad2db\AP8ad_8027.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.)
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\Microsoft\Windows\CurrentVersion
- RunOnce
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\RunOnce
- APCS = "%User Temp%\{malware file name} /cs:0 "
Step 5
Search and delete these files
- %User Profile%\8ad2db\AntimalwarePCS.exe
- %User Profile%\8ad2db\AP8ad_8027.exe
Step 6
Search and delete these folders
- %System Root%\hy{malware file name}
- %User Profile%\Application Data\8ad2db
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_AGENT_022006.TOMB. 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.
- %System Root%\hy{malware file name}\{malware file name}
- %User Temp%\{malware file name}
- %User Profile%\8ad2db\AP8AD_~1.EXE
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