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BKDR_FARFLI.ZM

October 08, 2012
 Analysis by: Christopher Daniel So
 ALIASES:

Backdoor:Win32/Farfli.A (Microsoft), Backdoor-DVB (McAfee)

 PLATFORM:

Windows 2000, XP, Server 2003

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This backdoor may be downloaded by other malware/grayware/spyware from remote sites. It may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

127,536 bytes

File Type:

PE

Memory Resident:

Yes

Initial Samples Received Date:

08 Dec 2010

Payload:

Connects to URLs/Ips, Drops files

Arrival Details

This backdoor may be downloaded by other malware/grayware/spyware from remote sites.

It may be dropped by other malware.

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.)

It drops the following file(s)/component(s):

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

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

Backdoor Routine

This backdoor connects to the following URL(s) to send and receive commands from a remote malicious user:

  • {BLOCKED}i.{BLOCKED}yi.com:443

  SOLUTION

Minimum Scan Engine:

8.900

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


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