BKDR_BIFROSE.AQA
Windows 98, ME, NT, 2000, XP, Server 2003
Threat Type:
Destructiveness:
Encrypted:
In the wild: Yes
TECHNICAL DETAILS
Installation
This Backdoor drops the following files:
- %User Temp%\DSC05412.JPG
(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.)
Other System Modifications
This Backdoor adds the following registry keys:
SOLUTION
Step 1
Terminate the malware/grayware/spyware process:
Step 2
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.
- HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\Windows\CURRENTVERSION\Internet Settings\5.0\Cache\Extensible Cache\MSHist012010041820100419
- CachePath=REG_EXPAND_SZ:
- CacheOptions=b
- CacheRepair=0
Step 3
Search and delete these files
- %User Temp%\DSC05412.JPG
Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
Step 4
Restore this file from backup Only Microsoft-related files will be restored. If this malware/grayware/spyware also deleted files related to programs that are not from Microsoft, please reinstall those programs on your computer again.
- %Windows%\BOOTWINDOWS.EXE
- %Application Data%\MICROSOFT\INTERNET EXPLORER\MSIMGSIZ.DAT
Step 5
Scan your computer with your Trend Micro product to delete files detected as
BKDR_BIFROSE.AQA
*Note: 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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