Analysis by: Kathleen Notario
ALIASES:

Backdoor:Win32/Farfli.A (Microsoft)

 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Backdoor drops the copies of itself into the affected system.

  TECHNICAL DETAILS

File Size: 127,536 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 03 Dec 2010

Installation

This backdoor drops the following copies of itself into the affected system:

  • %Windows%\dbramsy.exe

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

Dropping Routine

This backdoor drops the following files:

  • %Windows%\Log1.dll - detected as BKDR_FARFLI.ZK

(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

  SOLUTION

Minimum Scan Engine: 8.900

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

Remove malware files dropped/downloaded by BKDR_FARFLI.ZI

     BKDR_FARFLI.ZK

Step 3

Identify and terminate files detected as BKDR_FARFLI.ZI

[ Learn More ]
  1. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_FARFLI.ZI. 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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