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X2KM_DRIDEX.XCZ

May 13, 2016
 Analysis by: Janus Agcaoili
 ALIASES:

TrojanDownloader:O97M/Donoff (Microsoft), Troj/DocDl-ZC (Sophos), Trojan-Downloader.VBS.Agent.aqt (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

73,216 bytes

File Type:

XLS

Memory Resident:

No

Initial Samples Received Date:

28 Aug 2015

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Download Routine

This Trojan then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}aptops.pixub.com/3453/5fg44.exe

However, as of this writing, the said sites are inaccessible.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

11.884.05

FIRST VSAPI PATTERN DATE:

28 Aug 2015

VSAPI OPR PATTERN File:

11.885.00

VSAPI OPR PATTERN Date:

29 Aug 2015

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 X2KM_DRIDEX.XCZ. 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.

Step 3

Enable the macro virus protection in Microsoft Office Applications

[ Learn More ]


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