General

  • Target

    c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac

  • Size

    1.9MB

  • Sample

    240527-24m7saee86

  • MD5

    59e32f176072ca4240bb8dca80b1d3bf

  • SHA1

    f67c97822634632e3d33dae8d330762d659055cf

  • SHA256

    c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac

  • SHA512

    27f177faae224150faaeb1b855ed958bfbc06ccc6eabeca818c5a571aa864f6b8f9ed020b969792399628cd365d1b554b983d07eca6a29c5c6d2a7d8595c80ed

  • SSDEEP

    49152:CdKfTn6vWJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnttIuoITsdZ

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

    • MD5

      59e32f176072ca4240bb8dca80b1d3bf

    • SHA1

      f67c97822634632e3d33dae8d330762d659055cf

    • SHA256

      c6b36775bd61e4c4d11d798c6f51deb36f231acc0d6a62370e5fe2cffba86dac

    • SHA512

      27f177faae224150faaeb1b855ed958bfbc06ccc6eabeca818c5a571aa864f6b8f9ed020b969792399628cd365d1b554b983d07eca6a29c5c6d2a7d8595c80ed

    • SSDEEP

      49152:CdKfTn6vWJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnttIuoITsdZ

    • 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