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PE_RAMNIT.HL

May 28, 2013
 Analysis by: Roland Marco Dela Paz
 ALIASES:

Trojan:Win32/Ramnit (Microsoft)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: File infector

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This file infector executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

Varies

File Type:

PE

Memory Resident:

No

Initial Samples Received Date:

29 Feb 2012

File Infection

This is the Trend Micro detection for files infected by:

  • PE_RAMNIT.HL-O

Dropping Routine

This file infector drops the following files:

  • %Current%\Aoj9g23 - detected as PE_RAMNIT.HL-O

It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine:

9.200

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

Remove the malware/grayware file dropped/downloaded by PE_RAMNIT.HL

Step 3

Scan your computer with your Trend Micro product to clean files detected as PE_RAMNIT.HL. 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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