ALIASES:

VirTool:Win32/VBInject.UG (Microsoft); Generic Dropper!1j3 (McAfee); Trojan.Gen (Symantec); Trojan-Dropper.Win32.VB.bhmx (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt); Trojan.Generic.KDV.531561 (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: 645,664 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 29 Jun 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.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %User Profile%\Application Data\svechosts.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

Other System Modifications

This Trojan deletes the following files:

  • %User Temp%\MDM1.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.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Enigma Protector\
F9FCC21831453619-FF1807D920997992\2ABE2908881557A7-AB22E83BD9145FF9

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Enigma Protector\
F9FCC21831453619-FF1807D920997992\2ABE2908881557A7-AB22E83BD9145FF9
749576FC = "{random values}"

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.200

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

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\Enigma Protector\F9FCC21831453619-FF1807D920997992
    • 2ABE2908881557A7-AB22E83BD9145FF9

Step 3

Delete this registry value

[ 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\Enigma Protector\F9FCC21831453619-FF1807D920997992\2ABE2908881557A7-AB22E83BD9145FF9
    • 749576FC = "{random values}"

Step 4

Scan your computer with your Trend Micro product to delete files detected as TROJ_AGENT_006953.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.

Step 5

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %User Temp%\MDM1.tmp


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