Analysis by: Rika Joi Gregorio
ALIASES:

Trojan:Win32/Sirefef!cfg(Microsoft), ZeroAccess!cfg(McAfee), Mal/ZAccConf-A(Sophos)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan may be dropped by other malware.

This is the Trend Micro detection for files that exhibit certain behaviors.

  TECHNICAL DETAILS

File Size: 2,048 bytes
File Type: Other
Initial Samples Received Date: 09 May 2013

Arrival Details

This Trojan may be dropped by other malware.

Information Theft

This Trojan s configuration file contains the following information:

  • Date/Timestamp

Other Details

This is the Trend Micro detection for:

  • Configuration files dropped by variants of the TROJ_SIREFEF malware.

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.908.03
FIRST VSAPI PATTERN DATE: 10 May 2013
VSAPI OPR PATTERN File: 9.909.00
VSAPI OPR PATTERN Date: 11 May 2013

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_SIREFEF.CFG. 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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