TROJ_AGENT.BCPC

June 28, 2012
 Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

This malware is one of the 'Printer Virus' that prints several lines of characters when executed.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

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 then deletes itself afterward.

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

  TECHNICAL DETAILS

File Size:

90,624 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

07 Jun 2012

Payload:

Downloads files

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.

Installation

This Trojan executes then deletes itself afterward.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://storage5.static.{BLOCKED}s.ru/i/12/0601/h_1338571059_9957469_b48b167953.jpeg

It saves the files it downloads using the following names:

  • %User Temp%\{random}.exe - detected as ADW_EOREZO

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

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

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

9.176.06

FIRST VSAPI PATTERN DATE:

07 Jun 2012

VSAPI OPR PATTERN File:

9.177.00

VSAPI OPR PATTERN Date:

08 Jun 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

Remove malware files dropped/downloaded by TROJ_AGENT.BCPC

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT.BCPC. 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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