General

  • Target

    dropper.bat

  • Size

    5KB

  • Sample

    240619-z227taweqm

  • MD5

    35c7a7e7167b7ec08ad907e8762277d3

  • SHA1

    ed0cafe817899dbbf596d5ed03ec2d147d9f8b95

  • SHA256

    20a5c129290bc4e38576c59fe74f943a22ff587083968aecbbf734d136fffad6

  • SHA512

    5c50939961546f2c176459ede3653d4b2ce146667d5a781f0db8686fdab34c01e9d9ea9721397d6ba3e08aec94be505ca526b75a6c3dc32e2c554ad0e2597f23

  • SSDEEP

    96:CYBs0AstNGmqxoMbNa5aYbxaHOr9VP0wn7CiQP2fiv:1BsIaajn7CiQ3

Malware Config

Targets

    • Target

      dropper.bat

    • Size

      5KB

    • MD5

      35c7a7e7167b7ec08ad907e8762277d3

    • SHA1

      ed0cafe817899dbbf596d5ed03ec2d147d9f8b95

    • SHA256

      20a5c129290bc4e38576c59fe74f943a22ff587083968aecbbf734d136fffad6

    • SHA512

      5c50939961546f2c176459ede3653d4b2ce146667d5a781f0db8686fdab34c01e9d9ea9721397d6ba3e08aec94be505ca526b75a6c3dc32e2c554ad0e2597f23

    • SSDEEP

      96:CYBs0AstNGmqxoMbNa5aYbxaHOr9VP0wn7CiQP2fiv:1BsIaajn7CiQ3

    • AsyncRat

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

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Async RAT payload

    • Downloads MZ/PE file

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

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

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

2
T1112

Access Token Manipulation

1
T1134

Create Process with Token

1
T1134.002

Discovery

Query Registry

6
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

1
T1120

Command and Control

Web Service

1
T1102

Tasks