General

  • Target

    c77d70dd9dd6cda0c9eea8d0d8d8dc96def8f837bfbb18a396c459a3d143a6f9

  • Size

    1.9MB

  • Sample

    240527-3fz24sea3w

  • MD5

    ba151ce52420572cb59fc542d1f84e83

  • SHA1

    76f2f92508626f4ba53c8ccce7acf2664bc00c52

  • SHA256

    c77d70dd9dd6cda0c9eea8d0d8d8dc96def8f837bfbb18a396c459a3d143a6f9

  • SHA512

    d6140af2b7ca554405d3721018f18d36833d1872e43f245605dbfa42f299119531d1cbbf90b1277ddcac9490435b0e5d72457b9e9f114c63eb831c7ce3c9a1a8

  • SSDEEP

    49152:CdKfTn6vOJtTF+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

      c77d70dd9dd6cda0c9eea8d0d8d8dc96def8f837bfbb18a396c459a3d143a6f9

    • Size

      1.9MB

    • MD5

      ba151ce52420572cb59fc542d1f84e83

    • SHA1

      76f2f92508626f4ba53c8ccce7acf2664bc00c52

    • SHA256

      c77d70dd9dd6cda0c9eea8d0d8d8dc96def8f837bfbb18a396c459a3d143a6f9

    • SHA512

      d6140af2b7ca554405d3721018f18d36833d1872e43f245605dbfa42f299119531d1cbbf90b1277ddcac9490435b0e5d72457b9e9f114c63eb831c7ce3c9a1a8

    • SSDEEP

      49152:CdKfTn6vOJtTF+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