General

  • Target

    95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe

  • Size

    3.6MB

  • Sample

    250326-x63yss1xey

  • MD5

    69f3bc0083e17e7c28d06140308b12d8

  • SHA1

    3d637938626dbb7e63be9da10b83a94997f87f5c

  • SHA256

    95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb

  • SHA512

    8f5b3ea0d36a6f7b16a25aa69d9ba93ba2e60e01c48124d049177a9e4b8bc104fa1fabe37eb3cc7b1b39339b15388e6ae89b552d8aae23ffad1b225df9d14681

  • SSDEEP

    98304:wqiCGJV+6YRVnvrjgZQBB1pKOnTHq3IJYAsUx81J:wXCCYRVnvKOjq4SAsV7

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

BZ EMY

C2

bz-fnd3.ydns.eu:9841

wqo9.firewall-gateway.de:9792

Mutex

d9ad6O0279-3e005-4045-b50a-d6b5ff71d693

Attributes
  • encryption_key

    3145298725BA5E0DD56E87FFE3F8898EA81E6EDA

  • install_name

    MSworkbooks.exe

  • log_directory

    Logs

  • reconnect_delay

    6000

  • startup_key

    MSworkbook

  • subdirectory

    SubDir

Targets

    • Target

      95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb.exe

    • Size

      3.6MB

    • MD5

      69f3bc0083e17e7c28d06140308b12d8

    • SHA1

      3d637938626dbb7e63be9da10b83a94997f87f5c

    • SHA256

      95586fa277668206c164bcc7af2d92602bf6a993b9f7fda951bbd9fd3342e3eb

    • SHA512

      8f5b3ea0d36a6f7b16a25aa69d9ba93ba2e60e01c48124d049177a9e4b8bc104fa1fabe37eb3cc7b1b39339b15388e6ae89b552d8aae23ffad1b225df9d14681

    • SSDEEP

      98304:wqiCGJV+6YRVnvrjgZQBB1pKOnTHq3IJYAsUx81J:wXCCYRVnvKOjq4SAsV7

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar family

    • Quasar payload

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks

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