General

  • Target

    f700dbb00b021ec7aae45730deae300139cc3e644d6375d7d9d2a6d2330bb0d6

  • Size

    11.3MB

  • Sample

    230129-z8r1esdc69

  • MD5

    73227127a3d640f47ee9155ca93376ea

  • SHA1

    2bdec123a95cee29753f4f8262d1c8aee4373b54

  • SHA256

    f700dbb00b021ec7aae45730deae300139cc3e644d6375d7d9d2a6d2330bb0d6

  • SHA512

    513fb2743cd508be198edb932341608bc5177aa9153fe5d37f7450c2dfe060b4417d4dd4e72c80bad6c7ff6ee56652a2e353271de7b5ae2278af4fa5361167cc

  • SSDEEP

    196608:08U2MU8vvO95NZVDmCvsjtXje8rJFrF49/zMMnJ1WkGAEGVPMDPjcHdB6UE14:0z2F8gnVCze8nrmhJ4kGAEjPj+dBo14

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Jarmoir

C2

extra-large-step.auto.playit.gg:41705

Mutex

VNM_MUTEX_C21ZcJOFvO32vviyP0

Attributes
  • encryption_key

    itjIdJFadVQmRz5fsUXr

  • install_name

    $77boniarz.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Update

  • subdirectory

    System32

Targets

    • Target

      f700dbb00b021ec7aae45730deae300139cc3e644d6375d7d9d2a6d2330bb0d6

    • Size

      11.3MB

    • MD5

      73227127a3d640f47ee9155ca93376ea

    • SHA1

      2bdec123a95cee29753f4f8262d1c8aee4373b54

    • SHA256

      f700dbb00b021ec7aae45730deae300139cc3e644d6375d7d9d2a6d2330bb0d6

    • SHA512

      513fb2743cd508be198edb932341608bc5177aa9153fe5d37f7450c2dfe060b4417d4dd4e72c80bad6c7ff6ee56652a2e353271de7b5ae2278af4fa5361167cc

    • SSDEEP

      196608:08U2MU8vvO95NZVDmCvsjtXje8rJFrF49/zMMnJ1WkGAEGVPMDPjcHdB6UE14:0z2F8gnVCze8nrmhJ4kGAEjPj+dBo14

    • Contains code to disable Windows Defender

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

    • Modifies Windows Defender Real-time Protection settings

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

    • Executes dropped EXE

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Windows security modification

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Modify Existing Service

1
T1031

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

2
T1089

Install Root Certificate

1
T1130

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Command and Control

Web Service

1
T1102

Tasks