General

  • Target

    1ec4b542963df33bc15ac82bc872833ae7caf7e489c3f16866baf439dfabc37e

  • Size

    2.0MB

  • Sample

    240527-ar54aahf3w

  • MD5

    83785f236a01a5f17d9fa761597a25ec

  • SHA1

    7af7abb209d7c80932068d26059585f1cb53b07c

  • SHA256

    1ec4b542963df33bc15ac82bc872833ae7caf7e489c3f16866baf439dfabc37e

  • SHA512

    2eab7500396c48d3652119fdcfac9e955e98db1695b49d9fef3910fba7d8354f153c71fbbe3c6f6582548bc3fba4ed6b529ad9fc9300e2961c19966816f7ace6

  • 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

      1ec4b542963df33bc15ac82bc872833ae7caf7e489c3f16866baf439dfabc37e

    • Size

      2.0MB

    • MD5

      83785f236a01a5f17d9fa761597a25ec

    • SHA1

      7af7abb209d7c80932068d26059585f1cb53b07c

    • SHA256

      1ec4b542963df33bc15ac82bc872833ae7caf7e489c3f16866baf439dfabc37e

    • SHA512

      2eab7500396c48d3652119fdcfac9e955e98db1695b49d9fef3910fba7d8354f153c71fbbe3c6f6582548bc3fba4ed6b529ad9fc9300e2961c19966816f7ace6

    • 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