TROJ_BCJQ.B
TrojanSpy:Win32/VB.AAJ (Microsoft); Generic PWS.bf (McAfee); Backdoor.Trojan (Symantec); Trojan-Spy.Win32.VBChuchelo.ag, Trojan-Spy.Win32.VBChuchelo.ag (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Backdoor.Agent.ZDL (FSecure)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
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
333,560 bytes
EXE
No
10 Jan 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.
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
Windowss\system32
HKEY_CURRENT_USER\Software\Microsoft\
Visual Basic\6.0
It adds the following registry entries:
HKEY_CURRENT_USER\Software\VB and VBA Program Settings\
Windowss\system32
Start = "%System Root%\{malware file name}.exe"
Dropping Routine
This Trojan drops the following files:
- %System%\winupdate.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows 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
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\VB and VBA Program Settings\Windowss
- system32
- In HKEY_CURRENT_USER\Software\Microsoft\Visual Basic
- 6.0
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_CURRENT_USER\Software\VB and VBA Program Settings\Windowss\system32
- Start="%System Root%\{malware file name}.exe"
Step 4
Search and delete this file
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_BCJQ.B. 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.
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