General

  • Target

    3bcf9033604487fa6876a109c5bcf328ce9df706fa10d771fcf639291d72d551

  • Size

    2.0MB

  • Sample

    240525-1r6b6acc92

  • MD5

    5f010fe6da0a23517e3e08537004d14a

  • SHA1

    0346f981f72cd55c0e5bfbb6d4598adab0714d8b

  • SHA256

    3bcf9033604487fa6876a109c5bcf328ce9df706fa10d771fcf639291d72d551

  • SHA512

    91149594fb4b338c9031c160add1a668aebeaff1c51f283c7a7bc998ed189bf4df1cece271b09abf74f7237a4da3eced77b73f45796dcb1487034d43b2b09532

  • SSDEEP

    49152:s4K3x1vUiJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18itIuoITsdZ

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

      3bcf9033604487fa6876a109c5bcf328ce9df706fa10d771fcf639291d72d551

    • Size

      2.0MB

    • MD5

      5f010fe6da0a23517e3e08537004d14a

    • SHA1

      0346f981f72cd55c0e5bfbb6d4598adab0714d8b

    • SHA256

      3bcf9033604487fa6876a109c5bcf328ce9df706fa10d771fcf639291d72d551

    • SHA512

      91149594fb4b338c9031c160add1a668aebeaff1c51f283c7a7bc998ed189bf4df1cece271b09abf74f7237a4da3eced77b73f45796dcb1487034d43b2b09532

    • SSDEEP

      49152:s4K3x1vUiJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18itIuoITsdZ

    • 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