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Backdoor.MSIL.DCRAT.THCBABE

April 17, 2025
 Analysis by: Leidryn Saludez
 ALIASES:

Trojan-Spy.AgentTesla, Trojan-Spy.AgentTesla (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It connects to a website to send and receive information.

  TECHNICAL DETAILS

File Size:

753,664 bytes

File Type:

EXE

Initial Samples Received Date:

21 Mar 2025

Arrival Details

This Backdoor 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 Backdoor adds the following processes:

  • cmd.exe /C ping 1.1.1.1 -n 1 -w 3000 > Nul & Del

It injects codes into the following process(es):

  • installutil.exe

Backdoor Routine

This Backdoor connects to the following websites to send and receive information:

  • {BLOCKED}.{BLOCKED}.{BLOCKED}.237:80
  • http://{BLOCKED}.{BLOCKED}.{BLOCKED}.214.237/cdn/7Temp/updateexternalprotonAsync/multiImagepythoncdn/Sqlwp/ProtectTo/AsyncTempjavascript/Image4/Base7trafficCentral/2LinuxJavascriptProcessor/trafficwordpressLine/defaultwp7/Multi/VmrequestPacketSqlPublicdownloads.php

Other Details

This Backdoor does the following:

  • It is capable of doing:
    • keystroke logging
    • webcam access
    • file grabbing
    • password exfiltration

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.972.04

FIRST VSAPI PATTERN DATE:

21 Mar 2025

VSAPI OPR PATTERN File:

19.973.00

VSAPI OPR PATTERN Date:

22 Mar 2025

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     TROJ.Win32.TRX.XXPE50FFF091

Step 2

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 3

Scan your computer with your Trend Micro product to delete files detected as Backdoor.MSIL.DCRAT.THCBABE. 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 the following Trend Micro Support pages for more information:


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