Overview

overview

10

Static

static

10

AsyncCli222ent.exe

windows10-2004-x64

10

AsyncCli222ent.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    AsyncCli222ent.exe
  • Size 178KB
  • Sample260907-v6ly6ssblf
  • SHA256 abdc16c2814802034d5518f8c211c5679cc684ff03f6478c74d5f97d36a4e964
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
asyncrattestdefense_evasiondiscoveryevasionexecutionpersistenceprivilege_escalationratsuricatatrojan

Malware Config

Extracted

Family

  • asyncrat

Version

  • Reborn V1

Botnet

  • Test

C2

  • 43.228.157.121:8848

Mutex

  • pKrDVxvTuwqq

Attributes
  • delay

    0

  • install

    true

  • install_file

    VCRuntime Service.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target
      AsyncCli222ent.exe
    • Size 178KB
    • SHA256 abdc16c2814802034d5518f8c211c5679cc684ff03f6478c74d5f97d36a4e964
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    testdefense_evasiondiscoveryevasionexecutionasyncratpersistenceprivilege_escalationratsuricatatrojan

    • Async RAT payload

      rat

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Family: AsyncRat

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

      ratasyncrat

    • Modifies Windows Defender DisableAntiSpyware settings

      evasiontrojan

    • Modifies Windows Defender Real-time Protection settings

      defense_evasiontrojan

    • Modifies Windows Defender TamperProtection settings

      evasiontrojan

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

      Network activity triggered a Suricata alert

      suricataasyncrat

    • Event Triggered Execution: AppInit DLLs

      Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

      persistenceprivilege_escalation

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Windows security modification

      defense_evasiontrojan

    • Looks up external IP address via web service

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

      discovery
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Command Shell

1
T1059.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Create or Modify System Process

3
T1543

Windows Service

3
T1543.003

Event Triggered Execution

1
T1546

AppInit DLLs

1
T1546.010

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Create or Modify System Process

3
T1543

Windows Service

3
T1543.003

Event Triggered Execution

1
T1546

AppInit DLLs

1
T1546.010

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Impair Defenses

4
T1562

Disable or Modify Tools

4
T1562.001

Modify Registry

4
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks