Overview

overview

10

Static

static

1

WannaCry.js

windows10-2004-x64

10

WannaCry.js

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    WannaCry.js
  • Size 365KB
  • Sample260814-tvpegsem9v
  • SHA256 5311a5cdd30e10700ce2a5185568f810d4b36c5ed43e95ba849c70ea6d795712
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
asyncratfu88official.comdefense_evasiondiscoveryexecutionpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • fu88official.com

C2

  • fu88official.com:80

  • fu88official.com:8080

  • fu88official.com:443

  • fu88official.com:8443

  • fu88official.com:6606

  • fu88official.com:22

Mutex

  • NwzZuxDr6mOe

Attributes
  • delay

    3

  • install

    true

  • install_file

    GoogleUpdate.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target
      WannaCry.js
    • Size 365KB
    • SHA256 5311a5cdd30e10700ce2a5185568f810d4b36c5ed43e95ba849c70ea6d795712
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    fu88official.comdefense_evasiondiscoveryexecutionasyncratpersistencerat

    • Async RAT payload

      rat

    • Family: AsyncRat

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

      ratasyncrat

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Executes a VBScript file via the Windows Script Host.

      execution
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

4
T1059

JavaScript

1
T1059.007

PowerShell

1
T1059.001

Visual Basic

1
T1059.005

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks