General

  • Target

    fef1015fd098a13d649f4f2a1eb8544ab63b4f2affd8ac0be59b0766404890f0

  • Size

    2.0MB

  • Sample

    240525-ay2dnsgg44

  • MD5

    2a45ef40eb42e77b6bc04a653dd51896

  • SHA1

    1a393af0a844c2c4f2147662e21b7b7ef5582cf5

  • SHA256

    fef1015fd098a13d649f4f2a1eb8544ab63b4f2affd8ac0be59b0766404890f0

  • SHA512

    2885b28e17a62991571d24fec4bec9f7bdab9d65d83d2657c41770e2d35af6beaacd93f04f938f6dbecdb9e4213dd43d0aad456d465d4d1ebd982f5153387642

  • SSDEEP

    49152:s4K3x1vUmJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18mtIuoITsdZ

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

      fef1015fd098a13d649f4f2a1eb8544ab63b4f2affd8ac0be59b0766404890f0

    • Size

      2.0MB

    • MD5

      2a45ef40eb42e77b6bc04a653dd51896

    • SHA1

      1a393af0a844c2c4f2147662e21b7b7ef5582cf5

    • SHA256

      fef1015fd098a13d649f4f2a1eb8544ab63b4f2affd8ac0be59b0766404890f0

    • SHA512

      2885b28e17a62991571d24fec4bec9f7bdab9d65d83d2657c41770e2d35af6beaacd93f04f938f6dbecdb9e4213dd43d0aad456d465d4d1ebd982f5153387642

    • SSDEEP

      49152:s4K3x1vUmJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18mtIuoITsdZ

    • 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