General

  • Target

    c0026928e2e670919b00dac6cfbd73a1470215427bea7df11a0f4319e7839c1e

  • Size

    2.0MB

  • Sample

    240526-1erm8sdf92

  • MD5

    2f4dcb26db52ee80b6af0912aa28c5ab

  • SHA1

    5d3fbdcc1d7a06faebd66e5344bad90e9df4fa6d

  • SHA256

    c0026928e2e670919b00dac6cfbd73a1470215427bea7df11a0f4319e7839c1e

  • SHA512

    0526aae790ca7255576c49fe5244b9288a231ed6807cde51bc2599b1e34f655373d7db1f135455e7018fbaec4522966997172db89194f6c6d7f44e9806cca49d

  • SSDEEP

    49152:OePpQEJJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEJtIuoITsdZ

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

      c0026928e2e670919b00dac6cfbd73a1470215427bea7df11a0f4319e7839c1e

    • Size

      2.0MB

    • MD5

      2f4dcb26db52ee80b6af0912aa28c5ab

    • SHA1

      5d3fbdcc1d7a06faebd66e5344bad90e9df4fa6d

    • SHA256

      c0026928e2e670919b00dac6cfbd73a1470215427bea7df11a0f4319e7839c1e

    • SHA512

      0526aae790ca7255576c49fe5244b9288a231ed6807cde51bc2599b1e34f655373d7db1f135455e7018fbaec4522966997172db89194f6c6d7f44e9806cca49d

    • SSDEEP

      49152:OePpQEJJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEJtIuoITsdZ

    • 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