General

  • Target

    7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1

  • Size

    2.9MB

  • Sample

    240609-ccw8yacf25

  • MD5

    3f28e17012cb2f83025a7b4e163d3c1e

  • SHA1

    6d883768fbf3e5a0675815e8063e8b7909015b67

  • SHA256

    7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1

  • SHA512

    cb85b0cd141789e13ee6c60e676106155e349c3e85309602a3439e625f66cfa3c1f11587307e0fe620caf82000d9eec8c7e763e4ac81a8f19fac2cfe6e631439

  • SSDEEP

    49152:rtpSxptE1AKnCBMS4cdR/z4+UVi4e9Crn:r/4nE1dCmKxx4e9Cb

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

      7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1

    • Size

      2.9MB

    • MD5

      3f28e17012cb2f83025a7b4e163d3c1e

    • SHA1

      6d883768fbf3e5a0675815e8063e8b7909015b67

    • SHA256

      7156eced6e11b462d4f1a3d6a55be4d68905c388d6be870c8e174b61ff30cdf1

    • SHA512

      cb85b0cd141789e13ee6c60e676106155e349c3e85309602a3439e625f66cfa3c1f11587307e0fe620caf82000d9eec8c7e763e4ac81a8f19fac2cfe6e631439

    • SSDEEP

      49152:rtpSxptE1AKnCBMS4cdR/z4+UVi4e9Crn:r/4nE1dCmKxx4e9Cb

    • 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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • 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