Overview

overview

10

Static

static

3

1 (1).exe

windows7-x64

10

1 (1).exe

windows10-2004-x64

7

Sharing

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General

  • Target
    1 (1).exe
  • Size 5KB
  • Sample240430-d876rabd44
  • SHA256 fe01751cf5cbe6528ccc9ea26823545b35d7b606d4c955703c8008f0b4b8b02a
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • 93.123.85.108:4782

Mutex

  • e14b8f59-979b-4ebf-8602-dd3c4d6c301e

Attributes
  • encryption_key

    534734397C0FA9A1D28F061AD75DF4100BFF5787

  • install_name

    Msconfig.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Targets

    • Target
      1 (1).exe
    • Size 5KB
    • SHA256 fe01751cf5cbe6528ccc9ea26823545b35d7b606d4c955703c8008f0b4b8b02a
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Uses the VBS compiler for execution

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks