Analysis by: Jimelle Monteser
ALIASES:

TrojanDownloader:Win32/Garveep.B (Microsoft), a variant of Win32/Agent.SEL trojan (NOD32), Trojan.Win32.Agent (Ikarus)

 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: 39,816 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 23 Apr 2014

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 creates the following folders:

  • %Application Data%\Macromedia\Flash Player\newupdate

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://autoupdate.{BLOCKED}stia.com/patch/update.php?{random characters}
  • http://autoup.{BLOCKED}u.pn/patch/update.php?{random characters}

  SOLUTION

Minimum Scan Engine: 9.700
FIRST VSAPI PATTERN FILE: 10.750.04
FIRST VSAPI PATTERN DATE: 25 Apr 2014
VSAPI OPR PATTERN File: 10.751.00
VSAPI OPR PATTERN Date: 25 Apr 2014

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 folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Application Data%\Macromedia\Flash Player\newupdate

Step 3

Scan your computer with your Trend Micro product to delete files detected as TROJ_GARVEEP.MRU. 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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