General

  • Target

    ca1c2364fd6f5a7492624bb7dedfd6657a54b58612f3fbf9a3ad140d911b7181

  • Size

    2.0MB

  • Sample

    240525-312rfaga33

  • MD5

    36fdd58da0ee46e8e4fddbfbd283b580

  • SHA1

    6886a493bdfbfa8aa5948a40557be81353b8c1f2

  • SHA256

    ca1c2364fd6f5a7492624bb7dedfd6657a54b58612f3fbf9a3ad140d911b7181

  • SHA512

    d8e2e4df9abfc13cfe243a79f2d4eed0a3b35c7d4df1a6222ea9b62b7184f26c683e8959ef01f2c2db470754bee5a37cbc7015c9a11c43c3bb8aa696a539420f

  • SSDEEP

    49152:s4K3x1vU+JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18+tIuoITsdZ

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

      ca1c2364fd6f5a7492624bb7dedfd6657a54b58612f3fbf9a3ad140d911b7181

    • Size

      2.0MB

    • MD5

      36fdd58da0ee46e8e4fddbfbd283b580

    • SHA1

      6886a493bdfbfa8aa5948a40557be81353b8c1f2

    • SHA256

      ca1c2364fd6f5a7492624bb7dedfd6657a54b58612f3fbf9a3ad140d911b7181

    • SHA512

      d8e2e4df9abfc13cfe243a79f2d4eed0a3b35c7d4df1a6222ea9b62b7184f26c683e8959ef01f2c2db470754bee5a37cbc7015c9a11c43c3bb8aa696a539420f

    • SSDEEP

      49152:s4K3x1vU+JtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18+tIuoITsdZ

    • 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 Matrix ATT&CK v13

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

4
T1005

Tasks