Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31/10/2024, 01:21

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General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    fa0417d4b9f177a8cecfd88b345a7b28

  • SHA1

    85770ee9f13a58e5eb95fcfb3868fcf626ad6552

  • SHA256

    9e9ff4b542d31bc8a8a52099758c9cb274727d341881c8df448d8f33ffc20117

  • SHA512

    f7d6ae87130fb63da8c53a26e384d364b2706096f3cce6a74add75ed62c50e6b93748e388eae27132b772a5e017db1166c519a946a067d46157917f2f638b79e

  • SSDEEP

    49152:mv0t62XlaSFNWPjljiFa2RoUYIDQOEEfsUk/HYEoGdBVTHHB72eh2NT:mvo62XlaSFNWPjljiFXRoUYIDQOG/

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

10.127.0.227:4782

Mutex

cc382a3d-9ce3-4b59-ba4b-40acd01a72a5

Attributes
  • encryption_key

    955952829EF4D4C700D061DBC84790B29C3FF5DD

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Java update

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar family
    quasar
  • Quasar payload 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2516
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Java update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/2516-0-0x00007FFA0AAB3000-0x00007FFA0AAB5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2516-1-0x00000000006A0000-0x00000000009C4000-memory.dmp

    Filesize

    3.1MB

    Download

  • memory/2516-2-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/2516-3-0x000000001C520000-0x000000001C570000-memory.dmp

    Filesize

    320KB

    Download

  • memory/2516-4-0x000000001C630000-0x000000001C6E2000-memory.dmp

    Filesize

    712KB

    Download

  • memory/2516-5-0x00007FFA0AAB3000-0x00007FFA0AAB5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2516-6-0x00007FFA0AAB0000-0x00007FFA0B571000-memory.dmp

    Filesize

    10.8MB

    Download