General

  • Target

    6e8bb0aaa60ca64d389224b111401d4f0761e87af9e41b68a0f9241bedef5283

  • Size

    2.0MB

  • Sample

    240526-2vvv9sga43

  • MD5

    8d5538c1c6f7e89f9c0ca471caff877d

  • SHA1

    8f4c43f52c4d749a7e10ef515248d7279b14072d

  • SHA256

    6e8bb0aaa60ca64d389224b111401d4f0761e87af9e41b68a0f9241bedef5283

  • SHA512

    958c4e53b79fa6bdb6c821292e833bd77cbdbf2bb76d0ba5c6fa7a1861522573f405b891e9f72141cf7978a5ba3a3e8b7b67a3f1ae401d01286f557c6808a29b

  • SSDEEP

    49152:OePpQElJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEltIuoITsdZ

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

      6e8bb0aaa60ca64d389224b111401d4f0761e87af9e41b68a0f9241bedef5283

    • Size

      2.0MB

    • MD5

      8d5538c1c6f7e89f9c0ca471caff877d

    • SHA1

      8f4c43f52c4d749a7e10ef515248d7279b14072d

    • SHA256

      6e8bb0aaa60ca64d389224b111401d4f0761e87af9e41b68a0f9241bedef5283

    • SHA512

      958c4e53b79fa6bdb6c821292e833bd77cbdbf2bb76d0ba5c6fa7a1861522573f405b891e9f72141cf7978a5ba3a3e8b7b67a3f1ae401d01286f557c6808a29b

    • SSDEEP

      49152:OePpQElJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEltIuoITsdZ

    • 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