General

  • Target
    Wefaceswap.exe
  • Size 36.1MB
  • Sample240527-24849ade4v
  • SHA256 f954f818007b508badc400417584ae7726a71f4b697d8b1eb13184318ef1eda1
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • stealc

rc4.plain

Extracted

Family
  • vidar

C2
  • http://116.203.7.199:80

  • https://steamcommunity.com/profiles/76561199689717899

  • https://t.me/copterwin

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target
      Wefaceswap.exe
    • Size 36.1MB
    • SHA256 f954f818007b508badc400417584ae7726a71f4b697d8b1eb13184318ef1eda1
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Suspicious use of NtCreateThreadExHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks