General

  • Target

    9bf701fa1bfe9f06c262e262bd6e32fce87d195c6e0ede25dd1e8339bde1b39d.exe

  • Size

    2.1MB

  • Sample

    240522-cfzhgaha4t

  • MD5

    cce7a4c98202476cb31c37b50e93dae9

  • SHA1

    6547c6de2a4256ec3e5409ea31fee6106fd17d2c

  • SHA256

    9bf701fa1bfe9f06c262e262bd6e32fce87d195c6e0ede25dd1e8339bde1b39d

  • SHA512

    3ae818bf483833725e5cf2a8f15e1a4449f21233d71fec581d470527853b256a18a475ef7b33ec3d46624af9e8e59271fcf84bea27eb3ac3f3ccd08814d017f1

  • SSDEEP

    49152:N6uDuaS9refukJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9TktIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Targets

    • Target

      9bf701fa1bfe9f06c262e262bd6e32fce87d195c6e0ede25dd1e8339bde1b39d.exe

    • Size

      2.1MB

    • MD5

      cce7a4c98202476cb31c37b50e93dae9

    • SHA1

      6547c6de2a4256ec3e5409ea31fee6106fd17d2c

    • SHA256

      9bf701fa1bfe9f06c262e262bd6e32fce87d195c6e0ede25dd1e8339bde1b39d

    • SHA512

      3ae818bf483833725e5cf2a8f15e1a4449f21233d71fec581d470527853b256a18a475ef7b33ec3d46624af9e8e59271fcf84bea27eb3ac3f3ccd08814d017f1

    • SSDEEP

      49152:N6uDuaS9refukJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9TktIuoITsdZ

    • 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 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

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

Tasks