General

  • Target

    0ffef02908f711dc3b01b83a439e2aeaafa58b021a4c930ed47772e6d958931e.js

  • Size

    576KB

  • Sample

    240619-bfvzlsvepp

  • MD5

    da2a00db4ad85a7c84c8e3bdd158ed5b

  • SHA1

    fac36df9615e08267ca51c5c32db76b5d5a3b047

  • SHA256

    0ffef02908f711dc3b01b83a439e2aeaafa58b021a4c930ed47772e6d958931e

  • SHA512

    e09e36d25ccbc7b443c215adcd013c40da9d78c82ae479326c4f92b8fabc26b8fa3f6c937fdd2b717f37330999d03928c02cd98ba0c0987245e9118770976e66

  • SSDEEP

    12288:p68zPt15vj0FBKG5UmvOvhdvHVJwvPRjgTC7oS8Qo/A5Ih:p68zPRIFBOdvHvwXyTC7o5bh

Malware Config

Extracted

Family

xworm

Version

5.0

C2

107.175.101.198:7000

Mutex

dvNrQCwanoQ9ouuD

Attributes
  • install_file

    USB.exe

aes.plain

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot6410198048:AAGgeWnhGxZeYMKJkRauoOJwGKdxJztyd4k/

Targets

    • Target

      0ffef02908f711dc3b01b83a439e2aeaafa58b021a4c930ed47772e6d958931e.js

    • Size

      576KB

    • MD5

      da2a00db4ad85a7c84c8e3bdd158ed5b

    • SHA1

      fac36df9615e08267ca51c5c32db76b5d5a3b047

    • SHA256

      0ffef02908f711dc3b01b83a439e2aeaafa58b021a4c930ed47772e6d958931e

    • SHA512

      e09e36d25ccbc7b443c215adcd013c40da9d78c82ae479326c4f92b8fabc26b8fa3f6c937fdd2b717f37330999d03928c02cd98ba0c0987245e9118770976e66

    • SSDEEP

      12288:p68zPt15vj0FBKG5UmvOvhdvHVJwvPRjgTC7oS8Qo/A5Ih:p68zPRIFBOdvHvwXyTC7o5bh

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Detect Xworm Payload

    • StormKitty

      StormKitty is an open source info stealer written in C#.

    • StormKitty payload

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Detect packed .NET executables. Mostly AgentTeslaV4.

    • Detects Windows executables referencing non-Windows User-Agents

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

    • Detects executables packed with SmartAssembly

    • Detects executables referencing Windows vault credential objects. Observed in infostealers

    • Detects executables referencing credit card regular expressions

    • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers

    • Detects executables referencing many email and collaboration clients. Observed in information stealers

    • Detects executables referencing many file transfer clients. Observed in information stealers

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • 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.

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks