TSPY_AGENT.BAJW
VirTool:WinNT/Rootkitdrv.LH (Microsoft); [0000ae00.EXE]:Generic.ff, [000076b0.EXE]:Downloader-BOP!rootkit (McAfee); Downloader (Symantec); Trojan-Downloader.Win32.Agent.ntx (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan-Downloader:W32/Agent.GIZ (FSecure)
Windows 2000, Windows, XP, Windows Server 2003
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This spyware 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
Arrival Details
This spyware 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 spyware creates the following folders:
- %User Profile%\Application Data\Storm
- %User Profile%\Storm\update
- %User Profile%\update\%SESSIONNAME%
- %Windows%\SoftwareDistribution
- %Windows%\SoftwareDistribution\DataStore\Logs\
- %Windows%\SoftwareDistribution\DataStore
(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.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
Other System Modifications
This spyware deletes the following files:
- %User Profile%\%SESSIONNAME%\hqbko.cc3
- qgolvympf
- %User Profile%\locals~1\bwgeigbwur
- gbyvaejios
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\sOFtwaRe\qgolvympf
HKEY_LOCAL_MACHINE\sOFtwaRe\qgolvympfk
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Comhidserv70
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Control\MediaResources\msvideo
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\qgolvympf
seRVicemAIN = "BuildTrusteeWithSidA"
HKEY_LOCAL_MACHINE\SOFTWARE\qgolvympf
seRVicedlL = "%User Profile%\%SESSIONNAME%\hqbko.cc3"
HKEY_LOCAL_MACHINE\SOFTWARE\qgolvympf
module = "%User Profile%\locals~1\bwgeigbwur"
Dropping Routine
This spyware drops the following files:
- %User Temp%\DogKiller.sys
- %User Temp%\sv399.tmp
- %User Temp%\nuutousrmi.dat
- %User Profile%\locals~1\bwgeigbwur
(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.. %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.)
Other Details
This spyware connects to the following possibly malicious URL:
- http://noorok.{BLOCKED}5.5kr.info/bclcount/count.asp?mac=0050568e00d8&ver=2011111111
- http://noorok.{BLOCKED}5.5kr.info/bjchy.exe
This report is generated via an automated analysis system.
SOLUTION
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
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_LOCAL_MACHINE\sOFtwaRe
- qgolvympf
- In HKEY_LOCAL_MACHINE\sOFtwaRe
- qgolvympfk
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
- Comhidserv70
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\MediaResources
- msvideo
Step 3
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_LOCAL_MACHINE\SOFTWARE\qgolvympf
- seRVicemAIN="BuildTrusteeWithSidA"
- In HKEY_LOCAL_MACHINE\SOFTWARE\qgolvympf
- seRVicedlL="%User Profile%\%SESSIONNAME%\hqbko.cc3"
- In HKEY_LOCAL_MACHINE\SOFTWARE\qgolvympf
- module="%User Profile%\locals~1\bwgeigbwur"
Step 4
Search and delete these folders
- %User Profile%\Application Data\Storm
- %User Profile%\Storm\update
- %User Profile%\update\%SESSIONNAME%
- %Windows%\SoftwareDistribution
- %Windows%\SoftwareDistribution\DataStore\Logs\
- %Windows%\SoftwareDistribution\DataStore
Step 5
Search and delete these files
- %User Temp%\DogKiller.sys
- %User Temp%\sv399.tmp
- %User Temp%\nuutousrmi.dat
- %User Profile%\locals~1\bwgeigbwur
Step 6
Scan your computer with your Trend Micro product to delete files detected as TSPY_AGENT.BAJW. 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 Profile%\%SESSIONNAME%\hqbko.cc3
- qgolvympf
- %User Profile%\locals~1\bwgeigbwur
- gbyvaejios
- %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log
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