General

  • Target
    c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac
  • Size 1.9MB
  • Sample240527-24m7saee86
  • SHA256 c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • stealc

rc4.plain

Extracted

Family
  • vidar

C2
  • 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
      c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac
    • Size 1.9MB
    • SHA256 c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac
    • MD5 SHA1 SHA512 SSDEEP
    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • 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

    • Checks installed software on the system

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks