Analysis by: Nice Yutuc
 PLATFORM:

Windows 2000, Windows XP, Windows 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 may arrive bundled with malware packages as a malware component.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size: 94,208 bytes
File Type: EXE, DLL
Memory Resident: No
Initial Samples Received Date: 09 Mar 2012

Arrival Details

This backdoor may arrive bundled with malware packages as a malware component.

Backdoor Routine

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

  • http://fidk.{BLOCKED}s.dnset.com
  • http://{BLOCKED}.{BLOCKED}.152.100

Other Details

This backdoor requires its main component to successfully perform its intended routine.

  SOLUTION

Minimum Scan Engine: 8.900
FIRST VSAPI PATTERN FILE: 8.826.05
FIRST VSAPI PATTERN DATE: 10 Mar 2012
VSAPI OPR PATTERN File: 8.827.00
VSAPI OPR PATTERN Date: 11 Mar 2012

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

Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_RPKNUF.A. 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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