Analysis by: Jayvee Mark Villaroman
ALIASES:

Gen:Variant.Doina.49353 (BITDEFENDER)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

This Trojan Spy 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: 307,200 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 03 Feb 2023

Arrival Details

This Trojan Spy 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 Spy adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
Tracing = enigma_RASMANCS

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
Tracing = enigma_RASAPI32

Download Routine

This Trojan Spy connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}.{BLOCKED}.146.29/errlog/gate.php?hwid={HWID}
  • https://api.telegram.org/{BLOCKED}88:AAFlcHb4n74ushXHLzzt87RuHjx4jSNAsVA/getUpdates

Information Theft

This Trojan Spy gathers the following data:

  • CMD directory
  • Computer name
  • Extensions included in PATH
  • Home drive
  • Home path
  • Logon server
  • OpenSSL flags
  • Operating system
  • PATH
  • Powershell module path
  • Processor architecture
  • Processor count
  • Processor identifier
  • Processor level
  • System drive
  • System root
  • User domain
  • User name
  • User profile
  • Windows directory

Other Details

This Trojan Spy does the following:

  • It steals tokens and passwords stored in the following web browsers:
    • Chromium
    • Google Chrome
    • Opera
    • Iridium
    • 7Star
    • CentBrowser
    • Chedot
    • Vivaldi
    • Kometa
    • Elements
    • Epic
    • Sleipnir
    • Citrio
    • Coowon
    • liebao
    • QIP Surf
    • Orbutym
    • Comodo
    • Amigo
    • Torch
    • Yandex
    • 360Browser
    • Maxthon
    • K-Melon
    • CocCoc
    • Brave
    • Microsoft Edge
  • It connects to https://api.telegram.org/{BLOCKED}88:AAFlcHb4n74ushXHLzzt87RuHjx4jSNAsVA/
    • to retrieve malware updates
    • to send messages to the threat actor
    • to upload stolen information

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 18.234.04
FIRST VSAPI PATTERN DATE: 03 Feb 2023
VSAPI OPR PATTERN File: 18.235.00
VSAPI OPR PATTERN Date: 04 Feb 2023

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

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_LOCAL_MACHINE\SOFTWARE\Microsoft
    • Tracing = enigma_RASAPI32
  • In HKEY_LOCAL_,MACHINE\SOFTWARE\Microsoft
    • Tracing = enigma_RASMANCS

Step 3

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.ENIGMASTEALER.YXDBC. 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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