General

  • Target

    ren_installer.exe

  • Size

    3.1MB

  • Sample

    230529-lpw85sbe9t

  • MD5

    10c9f8a8e8c8c9797643d9b1edb01cc1

  • SHA1

    defcd4e8bba01bb730572dff40fad78e053f337a

  • SHA256

    0809e0c6095acabdcb816728c39fc818741c3197c4635d7a53a926f2f8df7557

  • SHA512

    a3c1e18ed24bcc03385a6cb7e50bae9c475c93f0a9af88ac731e9c1923b314ea60e79bd4b9b420b31050ea2d67ac6746cb7d3b2edba7056e91fd665f12311849

  • SSDEEP

    49152:+vgt62XlaSFNWPjljiFa2RoUYI3vLroGd4THHB72eh2NT:+vM62XlaSFNWPjljiFXRoUYI3vf

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ReServices

C2

185.65.134.175:55498

Mutex

86e242cc-399d-4e30-a743-e89f0418f106

Attributes
  • encryption_key

    B451C26057A2AEFC83990793720D2316EA48C49A

  • install_name

    renservice.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    renservice

  • subdirectory

    servicerenk

Targets

    • Target

      ren_installer.exe

    • Size

      3.1MB

    • MD5

      10c9f8a8e8c8c9797643d9b1edb01cc1

    • SHA1

      defcd4e8bba01bb730572dff40fad78e053f337a

    • SHA256

      0809e0c6095acabdcb816728c39fc818741c3197c4635d7a53a926f2f8df7557

    • SHA512

      a3c1e18ed24bcc03385a6cb7e50bae9c475c93f0a9af88ac731e9c1923b314ea60e79bd4b9b420b31050ea2d67ac6746cb7d3b2edba7056e91fd665f12311849

    • SSDEEP

      49152:+vgt62XlaSFNWPjljiFa2RoUYI3vLroGd4THHB72eh2NT:+vM62XlaSFNWPjljiFXRoUYI3vf

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Tasks