Overview

overview

10

Static

static

3

Nox Optimizer V2.exe

windows10-ltsc_2021-x64

10

Nox Optimizer V2.exe

windows10-2004-x64

3

Nox Optimizer V2.exe

windows11-21h2-x64

3

Nox Optimizer V2.exe

windows11-ltsc_2024-x64

3

Sharing

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General

  • Target
    Nox Optimizer V2.exe
  • Size 3.4MB
  • Sample261026-kyb4wsd16q
  • SHA256 f2a64e9ae8220fe7815ce7132604043a25476f3b626cd90608c32fc9f0e54cbb
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
quasaroffice04executionmodulepersistenceratspywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 1.6.6

Botnet

  • Office04

C2

  • 62.41.26.7:9170

Mutex

  • 4d709b56-22fe-4f9f-b993-27cd83aca3d9

Attributes
  • encryption_key

    7799F230382DEC15CFC54F1D560B5A8B875621D2

  • install_name

    Windows Security Health Service.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    logs

  • reconnect_delay

    3000

  • startup_key

    Windows Security Health Service

  • subdirectory

    system32

Targets

    • Target
      Nox Optimizer V2.exe
    • Size 3.4MB
    • SHA256 f2a64e9ae8220fe7815ce7132604043a25476f3b626cd90608c32fc9f0e54cbb
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    office04executionquasarmodulepersistenceratspywaretrojan

    • Family: Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • PulsaRAT library module

      Core component of the PulsaRAT remote access trojan, implementing its command protocol for hidden remote desktop, UAC bypass, persistence, and credential theft.

      ratmodule

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    behavioral1behavioral2behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks