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Analysis

  • max time kernel
    36s
  • max time network
    38s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241211-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241211-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    12/12/2024, 02:33

General

  • Target

    PORQUEPUTASYANOSIRVE.7z

  • Size

    923KB

  • MD5

    d757d40193d311216967491e36fc2ba4

  • SHA1

    2dd90fa74c489da4f85bdf301053230b480a31fa

  • SHA256

    8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685

  • SHA512

    9be26ab222457605eea0c42a4dbcfa80154cb384e6abf0db6a010fcca172a0eda8792b9e3fff9d67717f095f67448d9310c7e049f7fea8dd5907afe8bd462921

  • SSDEEP

    24576:q9gl2kNvEE7GFdGqXsShFTAkBojKLUI56eGk:46vbIGqXscAkW+h1

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

azxq0ap.localto.net:3425

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes
  • encryption_key

    AEA258EF65BF1786F0F767C0BE2497ECC304C46F

  • 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 family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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.

Processes

  • C:\Program Files\7-Zip\7zFM.exe
    "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.7z"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1124
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --string-annotations=is-enterprise-managed=no --field-trial-handle=5756,i,11057550979060774106,2035785093901894313,262144 --variations-seed-version --mojo-platform-channel-handle=5748 /prefetch:8
    1⤵
      PID:1768
    • C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe
      "C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1664
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        2⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5008
      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2980
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
          3⤵
          • Scheduled Task/Job: Scheduled Task
          PID:1632

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe

      Filesize

      3.1MB

      MD5

      73565f33ed4d8741291cbb30409f1727

      SHA1

      4d3a54b28f3ea80f884a25905e27165bdc353109

      SHA256

      aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

      SHA512

      d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

    • memory/1664-4-0x00007FFD14A53000-0x00007FFD14A55000-memory.dmp

      Filesize

      8KB

    • memory/1664-5-0x0000000000CF0000-0x0000000001014000-memory.dmp

      Filesize

      3.1MB

    • memory/1664-6-0x00007FFD14A50000-0x00007FFD15512000-memory.dmp

      Filesize

      10.8MB

    • memory/1664-9-0x00007FFD14A50000-0x00007FFD15512000-memory.dmp

      Filesize

      10.8MB

    • memory/2980-10-0x000000001CE80000-0x000000001CED0000-memory.dmp

      Filesize

      320KB

    • memory/2980-11-0x000000001CF90000-0x000000001D042000-memory.dmp

      Filesize

      712KB

    • memory/2980-12-0x000000001CEF0000-0x000000001CF02000-memory.dmp

      Filesize

      72KB

    • memory/2980-13-0x000000001CF50000-0x000000001CF8C000-memory.dmp

      Filesize

      240KB