General

  • Target

    Uni.bat

  • Size

    10.4MB

  • Sample

    241128-v6hxhsvjgv

  • MD5

    2c35e3c096365f1e1ad3bcc4de8574f7

  • SHA1

    5e96223c4626c43a1c3306dbb76d94881ba6abbd

  • SHA256

    91c8ec0b835f0470ee1a8b3c0c18b412c2883e3621e684cf273f3120252a8146

  • SHA512

    ccccc2f5a9d80a8fc1c8431dda01973f8b81832e1e77a1e42579beb3521febbd51d9d11f58782ee68d381235f902853a1f6597de2e6ca4b15cda2a66896f4f7c

  • SSDEEP

    49152:PqzgPmL6ky1xm3CCeGx8pb8y2qsqnnjh3WhZKEP7ciaTCfuoeKPtyT5YAv6cKoTW:a

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

v15.4.5 | SeroXen

C2

147.185.221.23:58175

Mutex

a00acb06-91e4-48b0-99a0-b2768c5ea752

Attributes
  • encryption_key

    E9B24DC5A9D33874B0626389429DD789286126DC

  • install_name

    .exe

  • log_directory

    $sxr-Logs

  • reconnect_delay

    230

  • startup_key

    $sxr-seroxen

Targets

    • Target

      Uni.bat

    • Size

      10.4MB

    • MD5

      2c35e3c096365f1e1ad3bcc4de8574f7

    • SHA1

      5e96223c4626c43a1c3306dbb76d94881ba6abbd

    • SHA256

      91c8ec0b835f0470ee1a8b3c0c18b412c2883e3621e684cf273f3120252a8146

    • SHA512

      ccccc2f5a9d80a8fc1c8431dda01973f8b81832e1e77a1e42579beb3521febbd51d9d11f58782ee68d381235f902853a1f6597de2e6ca4b15cda2a66896f4f7c

    • SSDEEP

      49152:PqzgPmL6ky1xm3CCeGx8pb8y2qsqnnjh3WhZKEP7ciaTCfuoeKPtyT5YAv6cKoTW:a

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • 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.

    • Deletes itself

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

    • Loads dropped DLL

    • Hide Artifacts: Hidden Window

      Windows that would typically be displayed when an application carries out an operation can be hidden.

    • 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 SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks