Analysis by: kathleenno
ALIASES:

Suspicious.MH690 (Symantec); TR/Dropper.Gen (Hbedv); Backdoor.Win32.VB (Ikarus); Win32.Trojan.Hrup.a.3 (Quickheal)

 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 deletes itself after execution.

  TECHNICAL DETAILS

File Size: 308,224 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 26 Mar 2011

Installation

This Trojan drops the following non-malicious files:

  • %Current%\{random numbers}_{Username}.nor
  • %Current%\{random numbers}_{Username}.r
  • %Current%\~RSP28.TMP

Other Details

This Trojan deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.925.00
VSAPI OPR PATTERN Date: 26 Mar 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

Search and delete these files

[ Learn More ]
There may be some component 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.
  • %Current%\{random numbers}_{Username}.nor
  • %Current%\{random numbers}_{Username}.r
  • %Current%\~RSP28.TMP

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_INJECT.SG. 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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