TROJ_FARFLI.PU
Trojan:Win32/Beaugrit.gen!AAA (Microsoft); Generic-FAAF!823531588154 (McAfee); Packed.Vmpbad!gen1 (Symantec); Mal/VMProtBad-A (Sophos); Trojan horse BackDoor.Generic_r.BSW (AVG)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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.
It deletes itself after execution.
TECHNICAL DETAILS
132,272 bytes
EXE
Yes
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 creates the following folders:
- %Program Files%\Windows {random}
(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).)
Autostart Technique
This Trojan registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings2}
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings1}
Other System Modifications
This Trojan adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings1}
ReleiceName = "{2 random strings2}
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings2}
ConnectGroup = "157157157157157"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings2}
MarkTime = "{date and time}"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings2}
Description = "{3 random strings}"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{2 random strings2}
ImagePath = "%Program Files%\Windows {random}\{random filename}.exe"
Dropping Routine
This Trojan drops the following files:
- %System Root%\{random numbers}.vbs <-deleted afterwards
- %Program Files%\Windows {random}\{random filename}.exe
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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).)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}r.{BLOCKED}e.qq.com/{random}
It deletes itself after execution.
SOLUTION
9.700
10.886.04
26 Jun 2014
10.887.00
26 Jun 2014
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
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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- {2 random strings2}
- {2 random strings2}
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- {2 random strings1}
- {2 random strings1}
Step 4
Search and delete this folder
- %Program Files%\Windows {random}
Step 5
Search and delete this file
- %System Root%\{random numbers}.vbs
- %Program Files%\Windows {random}\{random filename}.exe
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_FARFLI.PU. 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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