TROJ_STARTER.SM

October 09, 2012
 Analysis by: Marfel Tiamzon
 Modified by: Kathleen Notario
 ALIASES:

Trojan.Bamital (Symantec); Trojan:Win32/Ramnit.C (Microsoft); Trojan.Win32.Starter.yy (Kaspersky); W32/Ramnit.a (Mcafee); W32/Patched-I (Sophos); Trj/Starter.G (Panda)

 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 may be dropped by other malware.

It is a component of other malware.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

27 May 2011

Arrival Details

This Trojan may be dropped by other malware.

Installation

This Trojan adds the following processes:

  • {random filename}.exe

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • INTEL_CEDR_STORE

It is a component of other malware.

Other Details

This Trojan requires its main component to successfully perform its intended routine.

NOTES:
This malware’s main routine is to execute its main component file.

  SOLUTION

Minimum Scan Engine:

9.200

FIRST VSAPI PATTERN FILE:

8.184.06

FIRST VSAPI PATTERN DATE:

27 May 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

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