General

  • Target

    b058d2b08dfc9599a197f5044f1801b276bad5b999727a0e4d7d023ae1097705

  • Size

    1.7MB

  • Sample

    240612-c7eblsyhpl

  • MD5

    8753eae0b5a357484d0a93441c74ff61

  • SHA1

    ff94a89074d20bcaddad005080d7f25f28721f01

  • SHA256

    b058d2b08dfc9599a197f5044f1801b276bad5b999727a0e4d7d023ae1097705

  • SHA512

    e033c81f0270837a744692046a683fbff54b561964272af4bd24d78e0933280b1fb6a25616a7b9b28d678c3933be6a3ac9009e80ba801a5c2f6a53746df5cf29

  • SSDEEP

    24576:JoZYQkmdrf+oUfMxVVtes12FxwojKr98YGeGG9iH:JPYxdUkxVVChjHZQsH

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Targets

    • Target

      b058d2b08dfc9599a197f5044f1801b276bad5b999727a0e4d7d023ae1097705

    • Size

      1.7MB

    • MD5

      8753eae0b5a357484d0a93441c74ff61

    • SHA1

      ff94a89074d20bcaddad005080d7f25f28721f01

    • SHA256

      b058d2b08dfc9599a197f5044f1801b276bad5b999727a0e4d7d023ae1097705

    • SHA512

      e033c81f0270837a744692046a683fbff54b561964272af4bd24d78e0933280b1fb6a25616a7b9b28d678c3933be6a3ac9009e80ba801a5c2f6a53746df5cf29

    • SSDEEP

      24576:JoZYQkmdrf+oUfMxVVtes12FxwojKr98YGeGG9iH:JPYxdUkxVVChjHZQsH

    • Detect Vidar Stealer

    • Stealc

      Stealc is an infostealer written in C++.

    • Vidar

      Vidar is an infostealer based on Arkei stealer.

    • Detect binaries embedding considerable number of MFA browser extension IDs.

    • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs.

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion

    • Detects executables containing potential Windows Defender anti-emulation checks

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

3
T1552

Credentials In Files

3
T1552.001

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Collection

Data from Local System

3
T1005

Tasks