Overview

overview

10

Static

static

10

a5473ea4c4...40.exe

windows7-x64

10

a5473ea4c4...40.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    a5473ea4c4ef75c217e0d252d1c7d235b781a75810b7e731a97ed78b45646840
  • Size 3.1MB
  • Sample240423-cdvrhabd91
  • SHA256 a5473ea4c4ef75c217e0d252d1c7d235b781a75810b7e731a97ed78b45646840
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • funlink.ddns.net:4444

  • quasarhost1.ddns.net:4444

Mutex

  • c363b2f8-fc6a-4abd-a753-cff1aad2a173

Attributes
  • encryption_key

    CE5FBAC1A56C8C780C74FE8E7CD5CBCF8ABD6C8D

  • install_name

    updale.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    windows av startup

  • subdirectory

    SubDir

Targets

    • Target
      a5473ea4c4ef75c217e0d252d1c7d235b781a75810b7e731a97ed78b45646840
    • Size 3.1MB
    • SHA256 a5473ea4c4ef75c217e0d252d1c7d235b781a75810b7e731a97ed78b45646840
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables containing common artifacts observed in infostealers

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks