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Trojan.VBS.DRIDEX.G

March 23, 2020
 Modified by: Emilio Marcel Garcia
 ALIASES:

Trojan-Dropper.VBS.Cridex (IKARUS); W32/Agent.ABEF!tr (FORTINET)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


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:

517,134 bytes

File Type:

VBS

Memory Resident:

No

Initial Samples Received Date:

26 Feb 2020

Payload:

Connects to URLs/IPs, Steals information

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 files:

  • %User Temp%\{random}.dll

(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

  • %System%\regsvr32.exe -s %User Temp%\{random}.dll

(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Information Theft

This Trojan gathers the following data:

  • Computer name
  • Username
  • Logon server
  • Number of processors
  • Processor architecture
  • OS version
  • Home drive
  • Fullpath of important directories
  • Install path of the following:
    • Python
    • Perl
    • Powershell
    • IDM
    • Daniel Tools
    • UltraEdit

Stolen Information

This Trojan sends the gathered information via HTTP POST to the following URL:

  • {BLOCKED}.{BLOCKED}.95.7:443
  • {BLOCKED}.{BLOCKED}.95.182:443
  • {BLOCKED}.{BLOCKED}.38.218:691
  • {BLOCKED}.{BLOCKED}.135.97:3386

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.710.03

FIRST VSAPI PATTERN DATE:

27 Feb 2020

VSAPI OPR PATTERN File:

15.711.00

VSAPI OPR PATTERN Date:

28 Feb 2020

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete these files

[ 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%\{random}.dll

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.VBS.DRIDEX.G. 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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