Overview

overview

10

Static

static

1

Yb135-DOC-...pdf.js

windows10-2004-x64

10

Yb135-DOC-...pdf.js

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Yb135-DOC-875659222075,pdf.js
  • Size 1.9MB
  • Sample260928-2y63pswxcs
  • SHA256 f3d43379f8e0c574cd05c67c62544a25ce58700b9ce73759e43252802206d1fa
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
asyncratdonutloaderdefaultdiscoveryexecutionloaderpersistenceransomwareratsuricata

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • kkkbbb.duckdns.org:8080

Mutex

  • Gk9YDPsA7eZx

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Targets

    • Target
      Yb135-DOC-875659222075,pdf.js
    • Size 1.9MB
    • SHA256 f3d43379f8e0c574cd05c67c62544a25ce58700b9ce73759e43252802206d1fa
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defaultdiscoveryexecutionasyncratdonutloaderloaderratpersistenceransomwaresuricata

    • Async RAT payload

      rat

    • Detects DonutLoader

      loader

    • Family: AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

      ratasyncrat

    • Family: DonutLoader

      DonutLoader is a position-independent code that enables in-memory execution of VBScript, JScript, EXE, DLL files and dotNET assemblies.

      loaderdonutloader

    • Suricata alert: AsyncRAT Malware Default X.509 Certificate Detected - Inbound

      Network activity triggered a Suricata alert

      suricataasyncrat

    • Checks computer location settings

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

    • Executes dropped EXE

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks