Analysis

  • max time kernel
    119s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/07/2024, 04:20

General

  • Target
    stub.exe
  • Size 53.7MB
  • Sample240711-ex53payenl
  • SHA256 8393bd6d940551af47eaf07dd2b223622e422daaf4388aeaf34099fca736b2bf
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 147.185.221.20:9835

  • 147.185.221.20:18563

Mutex
  • da84adab-a321-4164-9473-73ad56cb4ed3

Attributes
  • encryption_key

    99DD896C463A5DEFC60E5185D43A6893ACB75CFB

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 8 IoCs
  • Suspicious use of SendNotifyMessage 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\stub.exe
    "C:\Users\Admin\AppData\Local\Temp\stub.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1776

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/1776-0-0x00007FFB17383000-0x00007FFB17385000-memory.dmp

        memory/1776-1-0x0000000000790000-0x0000000003D54000-memory.dmp

        memory/1776-2-0x00007FFB17380000-0x00007FFB17E41000-memory.dmp

        memory/1776-3-0x000000001F450000-0x000000001F4A0000-memory.dmp

        memory/1776-4-0x000000001F560000-0x000000001F612000-memory.dmp

        memory/1776-5-0x000000001F620000-0x000000001F6CA000-memory.dmp

        memory/1776-6-0x00007FFB17383000-0x00007FFB17385000-memory.dmp

        memory/1776-7-0x00007FFB17380000-0x00007FFB17E41000-memory.dmp

        memory/1776-8-0x000000001F420000-0x000000001F432000-memory.dmp

        memory/1776-9-0x000000001F4E0000-0x000000001F51C000-memory.dmp