General

  • Target

    f917b3429c6dd3f267d737d30146350f70958887a8b8687186ff0e457df4b23f

  • Size

    2.0MB

  • Sample

    240525-3epvrafa64

  • MD5

    03619626643693e3b4e3ce91c95eb50c

  • SHA1

    6fddcb004c8706ce4b5791124ea6692a784f2a0d

  • SHA256

    f917b3429c6dd3f267d737d30146350f70958887a8b8687186ff0e457df4b23f

  • SHA512

    d181d8c5e0aa2e559753305b279d4385cb8d488bb6e5858f75621a9699c0070d376293f3214714e2495710a0a8021b6932712ad243d4cb31be4ca9f6251a9769

  • SSDEEP

    49152:s4K3x1vUmJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18mtIuoITsdZ

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

      f917b3429c6dd3f267d737d30146350f70958887a8b8687186ff0e457df4b23f

    • Size

      2.0MB

    • MD5

      03619626643693e3b4e3ce91c95eb50c

    • SHA1

      6fddcb004c8706ce4b5791124ea6692a784f2a0d

    • SHA256

      f917b3429c6dd3f267d737d30146350f70958887a8b8687186ff0e457df4b23f

    • SHA512

      d181d8c5e0aa2e559753305b279d4385cb8d488bb6e5858f75621a9699c0070d376293f3214714e2495710a0a8021b6932712ad243d4cb31be4ca9f6251a9769

    • SSDEEP

      49152:s4K3x1vUmJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18mtIuoITsdZ

    • 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