General

  • Target

    dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427

  • Size

    2.0MB

  • Sample

    240526-zvl71sca4s

  • MD5

    6fed0bcd0900f4c90d68f62fa416ad54

  • SHA1

    9073d511e9632b1d24329f257d7c20e8a5ce169c

  • SHA256

    dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427

  • SHA512

    c0beb9cf52408b88a64bba3e51e4dfd58eea3c32c04e76b1df98fcfaca7fcf89fafa2c4884de71411c3e96f6005a4536b6efcb6348c84a4edbc0e57e319fadd8

  • SSDEEP

    49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

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

      dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427

    • Size

      2.0MB

    • MD5

      6fed0bcd0900f4c90d68f62fa416ad54

    • SHA1

      9073d511e9632b1d24329f257d7c20e8a5ce169c

    • SHA256

      dc83d905808a538e7f714d5ad331f04b4b0c0f706f432ea2b643bf8bcef8c427

    • SHA512

      c0beb9cf52408b88a64bba3e51e4dfd58eea3c32c04e76b1df98fcfaca7fcf89fafa2c4884de71411c3e96f6005a4536b6efcb6348c84a4edbc0e57e319fadd8

    • SSDEEP

      49152:OePpQEhJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEhtIuoITsdZ

    • 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