General

  • Target

    28258dc423ed44984a48a499e032e9fb2c1b3a285fb88e6475738079f1439050

  • Size

    1.9MB

  • Sample

    240527-zvpcdaaa2v

  • MD5

    5537fb521de9d6e9d0fd41532bbea2c2

  • SHA1

    3b69731366cf3c6cd106a59bae9e74b676a9a67f

  • SHA256

    28258dc423ed44984a48a499e032e9fb2c1b3a285fb88e6475738079f1439050

  • SHA512

    5908cc98d2ffbd1ea595a453a6a46a2f03f8942939a3801b0b230898d4193bb12b1237308cad7d24262b76167fb24d2eca0f0a15c731bf1b11bc271551e6f64f

  • SSDEEP

    49152:CdKfTn6vuJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnNtIuoITsdZ

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

      28258dc423ed44984a48a499e032e9fb2c1b3a285fb88e6475738079f1439050

    • Size

      1.9MB

    • MD5

      5537fb521de9d6e9d0fd41532bbea2c2

    • SHA1

      3b69731366cf3c6cd106a59bae9e74b676a9a67f

    • SHA256

      28258dc423ed44984a48a499e032e9fb2c1b3a285fb88e6475738079f1439050

    • SHA512

      5908cc98d2ffbd1ea595a453a6a46a2f03f8942939a3801b0b230898d4193bb12b1237308cad7d24262b76167fb24d2eca0f0a15c731bf1b11bc271551e6f64f

    • SSDEEP

      49152:CdKfTn6vuJtTF+TxMoxc1TU+j+dAzGwlrh:CdKfTnNtIuoITsdZ

    • 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