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TROJ_ZACCESS.DVC

October 09, 2012
 Analysis by: rolandde
 ALIASES:

ZeroAccess.a (McAfee); Trojan:Win32/Sirefef.O (Microsoft)

 PLATFORM:

Windows 2000, Windows, XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


This Trojan is a component file of the BKDR_ZACCESS malware family. It is used to access the following device object of its main malware.

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

File Size:

816 bytes

File Type:

PE

Memory Resident:

No

Initial Samples Received Date:

09 Nov 2011

Arrival Details

This Trojan may be dropped by other malware.

NOTES:

It is a component file of the BKDR_ZACCESS malware family.

It is used to access the following device object of its main malware:

  • \??\ACPI#PNP0303#2&da1a3ff&0

The said device contains other components that the mother malware uses for its malicious routines.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.568.02

FIRST VSAPI PATTERN DATE:

09 Nov 2011

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

Scan your computer with your Trend Micro product to delete files detected as TROJ_ZACCESS.DVC. 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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