General

  • Target

    https://mega.nz/file/BUJyhLgD#yGZ5H0TGS1lxoRxQ-t7--AXmj__pK1X6ImhvJczRjqc

  • Sample

    210724-1p6sc2mh56

Malware Config

Targets

    • Target

      https://mega.nz/file/BUJyhLgD#yGZ5H0TGS1lxoRxQ-t7--AXmj__pK1X6ImhvJczRjqc

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers.

    • Modifies security service

    • Modifies system executable filetype association

    • Registers COM server for autorun

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • suricata: ET MALWARE Observed Malicious SSL Cert (AsyncRAT Server)

    • Async RAT payload

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Drops startup file

    • Loads dropped DLL

    • Windows security modification

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Modify Existing Service

1
T1031

Change Default File Association

1
T1042

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

4
T1112

Disabling Security Tools

1
T1089

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Command and Control

Web Service

1
T1102

Tasks