General

  • Target

    Arsium Ransomware Builder.7z

  • Size

    3.4MB

  • Sample

    250209-rtspeatpfm

  • MD5

    42e9e45b77456883b7ed72875ecb4e1a

  • SHA1

    b65a32f19300af39f7e19abbc8bad4436c129531

  • SHA256

    2a2a56b751efe7cbdf1b8f7186135693ab65a3c2645f5567efbff977c42cfc56

  • SHA512

    54f96e3385774ca330ca7491ea0dafd90804cd2cd036e318bc38c685f98d323b79f7bfe36ef96289db030c693daa064046c48394aa2d47cc0a4487c224acc19f

  • SSDEEP

    98304:g+11eqPTtB9iolO8x0LH2f2BJNUwWgYIC6YQCgp+wamnK/Fqx:gs5P5B9iolOJi2BJ6SYICrZ0+7mnEwx

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Steam

C2

Minecrafthosting6969-35389.portmap.io:35389

Mutex

EAojkiVMQ0sDtyACyi

Attributes
  • encryption_key

    P5xHRD8P5ncR2T1uRpgp

  • install_name

    Steam.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Steam

  • subdirectory

    SubDir

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security Notification

C2

gamingzone90-25909.portmap.io:25909

Mutex

VNM_MUTEX_Ejw8ka3f07tGEgQHA3

Attributes
  • encryption_key

    qZLYnZOQyovJkVBseb5s

  • install_name

    Windows Security Notification.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Security Notification

  • subdirectory

    SubDir

Targets

    • Target

      Arsium Ransomware Builder.exe

    • Size

      3.5MB

    • MD5

      99bd2a5d346e6f119dca5392137d76ed

    • SHA1

      66c4f7bfafa46820b5b096e8d7a1ee7cf58b9319

    • SHA256

      6aab87e3a11a2fd55655f78effd7f1033d563ce15a06bf1cd4ec3a4d0937830f

    • SHA512

      62aabb4e8125afea3c316e63a677e707090524aa130da5cc40aac689ccaa9e34527c1d613f375389fee4188a91bcbd28e27b8982bc8d998b45e994f6c460e4e6

    • SSDEEP

      98304:QnmIT1y2JmONtNs4SDszKdXN4YS9gjf2h9FsYkSBW4Cc:Q3c2JmaLsz4zsKVijehH99BW4C

    • 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 DisableAntiSpyware settings

    • Modifies Windows Defender Real-time Protection settings

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • VenomRAT

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

    • Venomrat family

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Looks up external IP address via web service

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

MITRE ATT&CK Enterprise v15

Tasks