General

  • Target

    0d55b3f94e74aaf508391c04d3e7c2a74be1977c59bef2d07f8c84f8f4387d5b

  • Size

    2.0MB

  • Sample

    240524-1ta9ssce5s

  • MD5

    00c3509aa5a810f4fa04fdcfba6ac4c1

  • SHA1

    5ac0c1b6997604643f66a3695225ae429ce59092

  • SHA256

    0d55b3f94e74aaf508391c04d3e7c2a74be1977c59bef2d07f8c84f8f4387d5b

  • SHA512

    925bc195d73486b8501422bfda5a9f533c57467c636a6ae9cdb1471606d882094660b3ec3afdcee30d66aa1be08db826d41b93e4c8c7694b15fc395396c9eea3

  • SSDEEP

    49152:s4K3x1vUqJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18qtIuoITsdZ

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

      0d55b3f94e74aaf508391c04d3e7c2a74be1977c59bef2d07f8c84f8f4387d5b

    • Size

      2.0MB

    • MD5

      00c3509aa5a810f4fa04fdcfba6ac4c1

    • SHA1

      5ac0c1b6997604643f66a3695225ae429ce59092

    • SHA256

      0d55b3f94e74aaf508391c04d3e7c2a74be1977c59bef2d07f8c84f8f4387d5b

    • SHA512

      925bc195d73486b8501422bfda5a9f533c57467c636a6ae9cdb1471606d882094660b3ec3afdcee30d66aa1be08db826d41b93e4c8c7694b15fc395396c9eea3

    • SSDEEP

      49152:s4K3x1vUqJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18qtIuoITsdZ

    • 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