General

  • Target

    1a95d6973a21c919d71fa91ca8bf6a7a1091aaa57eb7c1adb4e6192da5d24600

  • Size

    1.9MB

  • Sample

    240528-ak8wlage47

  • MD5

    6aee657bccb661bd78c462ab077c3026

  • SHA1

    656cc2a6ba33e9b449863b7e66a59240496efb83

  • SHA256

    1a95d6973a21c919d71fa91ca8bf6a7a1091aaa57eb7c1adb4e6192da5d24600

  • SHA512

    daf32d8d3e18170dd595acf60e67fab74571b5659f796aa8b8c1266afcbc9df76233fd5189d40256808e7fd808322e09e30a428ab7201b10a3325622e1a410cc

  • SSDEEP

    49152:CdKfTn6vuJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTn9tIuoITsdZ

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

      1a95d6973a21c919d71fa91ca8bf6a7a1091aaa57eb7c1adb4e6192da5d24600

    • Size

      1.9MB

    • MD5

      6aee657bccb661bd78c462ab077c3026

    • SHA1

      656cc2a6ba33e9b449863b7e66a59240496efb83

    • SHA256

      1a95d6973a21c919d71fa91ca8bf6a7a1091aaa57eb7c1adb4e6192da5d24600

    • SHA512

      daf32d8d3e18170dd595acf60e67fab74571b5659f796aa8b8c1266afcbc9df76233fd5189d40256808e7fd808322e09e30a428ab7201b10a3325622e1a410cc

    • SSDEEP

      49152:CdKfTn6vuJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTn9tIuoITsdZ

    • 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