General

  • Target

    1691b1ffa5c27ee1273bbc3a6768026e8fcb815d3dd3b11c99de8e915df7bffb.exe

  • Size

    467KB

  • Sample

    240613-be2e1aybpd

  • MD5

    994820e52e73ea1e5f466a9d647ff727

  • SHA1

    0c26942023222df2d415c32ffa7d3c4f4f761035

  • SHA256

    1691b1ffa5c27ee1273bbc3a6768026e8fcb815d3dd3b11c99de8e915df7bffb

  • SHA512

    8cb65d0e34b45ab8c5d22fa061594ef2c404bb9e2df6dd8d8fec61518f191b5bcf5bcf07d4d6912d52e464d2f417f0e2b11f415c48b295196688c8608965ec1d

  • SSDEEP

    6144:T3PjMAbo8tdR6tivMh2WL+k3EbfJpmvhuFlLeuhtHSkJgiwJH7uHFmm9iXjq0GQ2:TIYo8tdR60GAJpUuFpV/yVNH7AqXjp

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/memve4erin

https://steamcommunity.com/profiles/76561199699680841

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Targets

    • Target

      1691b1ffa5c27ee1273bbc3a6768026e8fcb815d3dd3b11c99de8e915df7bffb.exe

    • Size

      467KB

    • MD5

      994820e52e73ea1e5f466a9d647ff727

    • SHA1

      0c26942023222df2d415c32ffa7d3c4f4f761035

    • SHA256

      1691b1ffa5c27ee1273bbc3a6768026e8fcb815d3dd3b11c99de8e915df7bffb

    • SHA512

      8cb65d0e34b45ab8c5d22fa061594ef2c404bb9e2df6dd8d8fec61518f191b5bcf5bcf07d4d6912d52e464d2f417f0e2b11f415c48b295196688c8608965ec1d

    • SSDEEP

      6144:T3PjMAbo8tdR6tivMh2WL+k3EbfJpmvhuFlLeuhtHSkJgiwJH7uHFmm9iXjq0GQ2:TIYo8tdR60GAJpUuFpV/yVNH7AqXjp

    • 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.

    • 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 Enterprise v15

Tasks