Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-01-2025 15:20

General

  • Target

    Updater.exe

  • Size

    3.2MB

  • MD5

    bde27400071e8114a50e49c7a7d5aca3

  • SHA1

    e8ba2d9c033467c5b9bc68f3646da6d24ab18bec

  • SHA256

    cf69d61f1cba5ad3feb85ba91931d37ae5862eb2a7d5d9f5ab10b8817139cdcc

  • SHA512

    13be08ea18cc1859f5bcc2f8346d1772e232ab9380a80e20116183f880fc21999b520e91c1206faffbbd60111b12567e99ed4807d219d409f9848cd7c5596cbf

  • SSDEEP

    49152:zvTI22SsaNYfdPBldt698dBcjH01xY1v4LoG2Y8THHB72eh2NT:zvs22SsaNYfdPBldt6+dBcjH01xj

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

nukedrust-59850.portmap.host:59850

Mutex

e18b24bb-41a4-4371-91a7-7a5c163c4d80

Attributes
  • encryption_key

    D1BE981B0A025276CA1B60203BDCB46D48C43278

  • install_name

    svchost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Update.exe

  • subdirectory

    modules

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 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 behavior: LoadsDriver 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 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:\Users\Admin\AppData\Local\Temp\Updater.exe
    "C:\Users\Admin\AppData\Local\Temp\Updater.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:640
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Update.exe" /sc ONLOGON /tr "C:\Windows\system32\modules\svchost.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:828
    • C:\Windows\system32\modules\svchost.exe
      "C:\Windows\system32\modules\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1756
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Update.exe" /sc ONLOGON /tr "C:\Windows\system32\modules\svchost.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3672
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:2896
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x4f0 0x458
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1664
    • C:\Windows\System32\svchost.exe
      C:\Windows\System32\svchost.exe -k UnistackSvcGroup
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:808

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Comms\UnistoreDB\store.jfm

      Filesize

      16KB

      MD5

      daa41265bdfadd9277e8cdffe11e18e0

      SHA1

      993316f215a701a2d946a2529b911997c461c2a2

      SHA256

      b5e1c6fc3cb8b71a990f5c2735114cf29829f9775d785e05e11abefde0427a89

      SHA512

      7c19f0247f7b7bad3e3b8328406d1f349dc820f0a7cab494a8b8cdd574c3c2efa38abcfc89a2e1d25b4f6523814a031322f86dfd91bcf1bf1f81908f3e3bab2b

    • C:\Windows\System32\modules\svchost.exe

      Filesize

      3.2MB

      MD5

      bde27400071e8114a50e49c7a7d5aca3

      SHA1

      e8ba2d9c033467c5b9bc68f3646da6d24ab18bec

      SHA256

      cf69d61f1cba5ad3feb85ba91931d37ae5862eb2a7d5d9f5ab10b8817139cdcc

      SHA512

      13be08ea18cc1859f5bcc2f8346d1772e232ab9380a80e20116183f880fc21999b520e91c1206faffbbd60111b12567e99ed4807d219d409f9848cd7c5596cbf

    • memory/640-0-0x00007FFC0D293000-0x00007FFC0D295000-memory.dmp

      Filesize

      8KB

    • memory/640-1-0x0000000000E50000-0x0000000001190000-memory.dmp

      Filesize

      3.2MB

    • memory/640-2-0x00007FFC0D290000-0x00007FFC0DD51000-memory.dmp

      Filesize

      10.8MB

    • memory/640-9-0x00007FFC0D290000-0x00007FFC0DD51000-memory.dmp

      Filesize

      10.8MB

    • memory/808-61-0x000002874B070000-0x000002874B071000-memory.dmp

      Filesize

      4KB

    • memory/808-56-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-84-0x000002874B1B0000-0x000002874B1B1000-memory.dmp

      Filesize

      4KB

    • memory/808-85-0x000002874B1B0000-0x000002874B1B1000-memory.dmp

      Filesize

      4KB

    • memory/808-86-0x000002874B2C0000-0x000002874B2C1000-memory.dmp

      Filesize

      4KB

    • memory/808-18-0x0000028742D40000-0x0000028742D50000-memory.dmp

      Filesize

      64KB

    • memory/808-34-0x0000028742E40000-0x0000028742E50000-memory.dmp

      Filesize

      64KB

    • memory/808-50-0x000002874B420000-0x000002874B421000-memory.dmp

      Filesize

      4KB

    • memory/808-51-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-52-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-53-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-54-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-55-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-82-0x000002874B1A0000-0x000002874B1A1000-memory.dmp

      Filesize

      4KB

    • memory/808-57-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-58-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-59-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-60-0x000002874B450000-0x000002874B451000-memory.dmp

      Filesize

      4KB

    • memory/808-70-0x000002874AFA0000-0x000002874AFA1000-memory.dmp

      Filesize

      4KB

    • memory/808-62-0x000002874B060000-0x000002874B061000-memory.dmp

      Filesize

      4KB

    • memory/808-64-0x000002874B070000-0x000002874B071000-memory.dmp

      Filesize

      4KB

    • memory/808-67-0x000002874B060000-0x000002874B061000-memory.dmp

      Filesize

      4KB

    • memory/1756-11-0x000000001E470000-0x000000001E4C0000-memory.dmp

      Filesize

      320KB

    • memory/1756-10-0x00007FFC0D290000-0x00007FFC0DD51000-memory.dmp

      Filesize

      10.8MB

    • memory/1756-12-0x000000001E580000-0x000000001E632000-memory.dmp

      Filesize

      712KB

    • memory/1756-17-0x00007FFC0D290000-0x00007FFC0DD51000-memory.dmp

      Filesize

      10.8MB

    • memory/1756-16-0x000000001E540000-0x000000001E57C000-memory.dmp

      Filesize

      240KB

    • memory/1756-15-0x000000001E4E0000-0x000000001E4F2000-memory.dmp

      Filesize

      72KB