General

  • Target

    adcab57639c3387689b11fabefd4de9c3841451a9418139deb38b9c409d95969

  • Size

    2.0MB

  • Sample

    240524-2c9xgade55

  • MD5

    a953ed89ff8c2a1f443cddf8c999a6f0

  • SHA1

    7692ced15a252de56d06f0da05ef356441da9cc7

  • SHA256

    adcab57639c3387689b11fabefd4de9c3841451a9418139deb38b9c409d95969

  • SHA512

    f2fe999b0dae7bc6aafaeafcda9ef43df00b426ddfb5efb2f4a56f21aaf0033f39da8c8f8e7e7cdc6dac59f94c624468bffbdf99a811c99081a59391a0eeaf4f

  • SSDEEP

    49152:s4K3x1vUGJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18GtIuoITsdZ

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

      adcab57639c3387689b11fabefd4de9c3841451a9418139deb38b9c409d95969

    • Size

      2.0MB

    • MD5

      a953ed89ff8c2a1f443cddf8c999a6f0

    • SHA1

      7692ced15a252de56d06f0da05ef356441da9cc7

    • SHA256

      adcab57639c3387689b11fabefd4de9c3841451a9418139deb38b9c409d95969

    • SHA512

      f2fe999b0dae7bc6aafaeafcda9ef43df00b426ddfb5efb2f4a56f21aaf0033f39da8c8f8e7e7cdc6dac59f94c624468bffbdf99a811c99081a59391a0eeaf4f

    • SSDEEP

      49152:s4K3x1vUGJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18GtIuoITsdZ

    • 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