General

  • Target

    292f27a223cc2333667ad92bbe375df8f27e8a1deb9e2058cf7c4754ca22cbe4

  • Size

    2.0MB

  • Sample

    240528-astrmsgg82

  • MD5

    e70874202d0cb225c74accd8175ecea9

  • SHA1

    9aa8f40e950249731c0f071b8206bf0e1793fca2

  • SHA256

    292f27a223cc2333667ad92bbe375df8f27e8a1deb9e2058cf7c4754ca22cbe4

  • SHA512

    f20bbed6d2b2ef1c2123540bc5bc917e0a24d439fd81c717e8626bb2a5dd855968cc16f36ddd426f1d389e1bbba7f0e74566740197f96b2c9770943dfbd109c3

  • SSDEEP

    49152:s4K3x1vUGJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18GtIuoITsdZ

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

      292f27a223cc2333667ad92bbe375df8f27e8a1deb9e2058cf7c4754ca22cbe4

    • Size

      2.0MB

    • MD5

      e70874202d0cb225c74accd8175ecea9

    • SHA1

      9aa8f40e950249731c0f071b8206bf0e1793fca2

    • SHA256

      292f27a223cc2333667ad92bbe375df8f27e8a1deb9e2058cf7c4754ca22cbe4

    • SHA512

      f20bbed6d2b2ef1c2123540bc5bc917e0a24d439fd81c717e8626bb2a5dd855968cc16f36ddd426f1d389e1bbba7f0e74566740197f96b2c9770943dfbd109c3

    • SSDEEP

      49152:s4K3x1vUGJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18GtIuoITsdZ

    • 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

    • Loads dropped DLL

    • 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