General

  • Target

    d0371a2f2ea5e15d587121ef27f7455a032c16a94751df79046397371f942eec

  • Size

    1.9MB

  • Sample

    240527-2bjnwsdc72

  • MD5

    b5e8187adb965b2bfd4f57880ef9ee2f

  • SHA1

    fb7516511580c16a9006b05cc0971e35a58850bd

  • SHA256

    d0371a2f2ea5e15d587121ef27f7455a032c16a94751df79046397371f942eec

  • SHA512

    f9a088175aa81b5b728949f0165ebe575c0b275b99597580c4ea08b08e1fb9ed44a9bd8f3a69ef13a1435d52fc35d5b788ee49d76982c09121550bef473547fa

  • SSDEEP

    49152:CdKfTn6v6JtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnBtIuoITsdZ

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

      d0371a2f2ea5e15d587121ef27f7455a032c16a94751df79046397371f942eec

    • Size

      1.9MB

    • MD5

      b5e8187adb965b2bfd4f57880ef9ee2f

    • SHA1

      fb7516511580c16a9006b05cc0971e35a58850bd

    • SHA256

      d0371a2f2ea5e15d587121ef27f7455a032c16a94751df79046397371f942eec

    • SHA512

      f9a088175aa81b5b728949f0165ebe575c0b275b99597580c4ea08b08e1fb9ed44a9bd8f3a69ef13a1435d52fc35d5b788ee49d76982c09121550bef473547fa

    • SSDEEP

      49152:CdKfTn6v6JtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnBtIuoITsdZ

    • 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