General

  • Target

    45898e8046f7047c978740d3bd7b6a929e56be86516af22919f7aeb77fdca617

  • Size

    2.0MB

  • Sample

    240527-akrbjsac38

  • MD5

    f1297ae21f3ccab12c5f0b78c3dc967a

  • SHA1

    48ef9e8c9dbb0add8ace2816f395fcb769039c06

  • SHA256

    45898e8046f7047c978740d3bd7b6a929e56be86516af22919f7aeb77fdca617

  • SHA512

    fad914dc20f2d9a5414db25f58be43c651d9ccab69566e34bc1a2f249a1205a0b9397c9cc3b3730af026dfe69460a69f3113f7016e21678fb6ff0b160db78ded

  • SSDEEP

    49152:OePpQE1JtTF+TxMoxc1TU+j+dAzGwlrh:OePpQE1tIuoITsdZ

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

      45898e8046f7047c978740d3bd7b6a929e56be86516af22919f7aeb77fdca617

    • Size

      2.0MB

    • MD5

      f1297ae21f3ccab12c5f0b78c3dc967a

    • SHA1

      48ef9e8c9dbb0add8ace2816f395fcb769039c06

    • SHA256

      45898e8046f7047c978740d3bd7b6a929e56be86516af22919f7aeb77fdca617

    • SHA512

      fad914dc20f2d9a5414db25f58be43c651d9ccab69566e34bc1a2f249a1205a0b9397c9cc3b3730af026dfe69460a69f3113f7016e21678fb6ff0b160db78ded

    • SSDEEP

      49152:OePpQE1JtTF+TxMoxc1TU+j+dAzGwlrh:OePpQE1tIuoITsdZ

    • 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