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Threat Encyclopedia

TROJ_AGENT_016373.TOMB


ALIASES:

AdClicker-JO (McAfee); Trojan.Gen.2 (Symantec); Trojan-Clicker.Win32.Agent.wsw (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Gen:Variant.Graftor.6657 (FSecure)

PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

OVERALL RISK RATING:
DAMAGE POTENTIAL:
DISTRIBUTION POTENTIAL:
REPORTED INFECTION:

  • 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:

339,968 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

08 Jul 2012

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 System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
TreeIEMDI

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
TreeIEMDI\Recent File List

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
TreeIEMDI\Settings

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\1.tmp

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

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://x206.{BLOCKED}s.com/bf/click/click?gid=11048&mid=xiaogb

This report is generated via an automated analysis 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

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.


  • In HKEY_CURRENT_USER\Software
    • Local AppWizard-Generated Applications
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
    • TreeIEMDI
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\TreeIEMDI
    • Recent File List
  • In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\TreeIEMDI
    • Settings

Step 3

Search and delete this file

[ 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.
  • %User Temp%\1.tmp

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT_016373.TOMB. 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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