Overview

overview

10

Static

static

10

avb.eu.exe

windows10-2004-x64

10

avb.eu.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    avb.eu.com
  • Size 3.1MB
  • Sample260518-eckw1sfx4y
  • SHA256 f7ebddff5d7ebd52d585ea20d025fb79aee34ef3985cbd29c505edaf29b36c0b
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04discoveryexecutionpersistencespywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • avb.eu.com:443

  • www.avb.eu.com:443

  • avb.eu.com:80

  • www.avb.eu.com:80

Mutex

  • f86288cf-f9a7-4ee9-b664-decdbd168297

Attributes
  • encryption_key

    ED3227F773701D05083B11A65776F95F93EEEF5E

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      avb.eu.com
    • Size 3.1MB
    • SHA256 f7ebddff5d7ebd52d585ea20d025fb79aee34ef3985cbd29c505edaf29b36c0b
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04discoveryexecutionquasarpersistencespywaretrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks