TROJ_DELF.AFP
TrojanDropper:Win32/Delf.RT (Microsoft); PWS-Hook (McAfee); Backdoor.Graybird (Symantec); Trojan-Dropper.Win32.Delf.rd (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan horse PSW.VB.GY (AVG)
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
38,031 bytes
EXE
No
22 Jun 2013
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_CLASSES_ROOT\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}
HKEY_CLASSES_ROOT\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}\
InProcServer32
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}\InProcServer32
ThreadingModel = "Apartment"
Dropping Routine
This Trojan drops the following files:
- %Program Files%\Common Files\Microsoft Shared\MSINFO\xiaran.vxd
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
This report is generated via an automated analysis system.
SOLUTION
9.300
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
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_CLASSES_ROOT\CLSID
- {08315C1A-9BA9-4B7C-A432-26885F78DF28}
- In HKEY_CLASSES_ROOT\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}
- InProcServer32
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\Classes\CLSID\{08315C1A-9BA9-4B7C-A432-26885F78DF28}\InProcServer32
- ThreadingModel = "Apartment"
Step 4
Search and delete this file
- %Program Files%\Common Files\Microsoft Shared\MSINFO\xiaran.vxd
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_DELF.AFP. 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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