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TROJ_DOFOIL.JQ

October 09, 2012
 Analysis by: Anthony Joe Melgarejo
 ALIASES:

TrojanDownloader:Win32/Dofoil.L (Microsoft), PWS-Zbot.gen.hv (McAfee), a variant of Win32/Kryptik.ACRO trojan (NOD32), Troj/Katusha-S (Sophos)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • 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.

This file contains a URL where it connects to possibly download other files.

  TECHNICAL DETAILS

File Size:

48,128 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

17 Mar 2012

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.

Other Details

This file contains a URL where it connects to possibly download other files. As of this writing, this file contains the following URLs:

  • http://{BLOCKED}nika.in/tmp/index.php?cmd=getload&login={values}&file={number}&sel={value}&run=ok
  • http://{BLOCKED}nika.in/tmp/index.php?cmd=getload&login={values}&file={number}&sel={value}
  • http://{BLOCKED}nika.in/tmp/index.php?cmd=getgrab

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.390.04

FIRST VSAPI PATTERN DATE:

13 Sep 2012

VSAPI OPR PATTERN File:

9.391.00

VSAPI OPR PATTERN Date:

14 Sep 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

Scan your computer with your Trend Micro product and note files detected as TROJ_DOFOIL.JQ

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete files detected as TROJ_DOFOIL.JQ

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.

Step 5

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