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TROJ_COINMINE.BC

September 02, 2013
 Analysis by: Rika Joi Gregorio
 ALIASES:

Trojan:Win32/Dotimorn.A(Microsoft), a variant of Win32/CoinMiner.BP trojan(Eset)

 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:
 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.

  TECHNICAL DETAILS

File Size:

133,632 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Aug 2013

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 Trojan requires the following additional components to properly run:

  • {malware path}\liblnx.cl

NOTES:

If {malware path}\liblnx.cl is found, it will drop and execute the following file:

  • {malware path}\liblnx.bat - copy of liblnx.cl

The dropped copy deletes itself after execution.

  SOLUTION

Minimum Scan Engine:

9.300

FIRST VSAPI PATTERN FILE:

10.246.04

FIRST VSAPI PATTERN DATE:

29 Aug 2013

VSAPI OPR PATTERN File:

10.247.00

VSAPI OPR PATTERN Date:

30 Aug 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

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • {malware path}\liblnx.cl
  • {malware path}\liblnx.bat

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_COINMINE.BC. 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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