Analysis

  • max time kernel
    149s
  • 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
    17-12-2024 16:37

General

  • Target

    7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe

  • Size

    3.1MB

  • MD5

    8cadd9d05b28bdf0f3caeed0ce516d9c

  • SHA1

    b6b04039117acc2ffaef424eeaf6d99b4086487f

  • SHA256

    7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7

  • SHA512

    2e1c01240ac20ac2a374926893fa4796d4f4daa8f479c1c55ad62791ca0cb32cc8baf192d849abefc9c1a88d69045f4aeb563105d5d54fcac049b3b8f2ba7fee

  • SSDEEP

    49152:zvghBYjCO4Dt2d5aKCuVPzlEmVQL0wvwkaj3QaEfeak/l4XoGdPTHHB72eh2NT:zvSt2d5aKCuVPzlEmVQ0wvwfj3QSY

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Manager

C2

serveo.net:11453

Mutex

a851cc5b-e50f-4270-9929-06c6323cdb3d

Attributes
  • encryption_key

    5A3C537E5FB2739D5B2468FC37915D58EF4AC5EA

  • install_name

    Runtime broker.exe

  • log_directory

    Microsoftsessential

  • reconnect_delay

    3000

  • startup_key

    Runtime broker

  • subdirectory

    Microsoft_Essentials

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 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 2 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\7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe
    "C:\Users\Admin\AppData\Local\Temp\7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4952
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Runtime broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:3488
    • C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3344
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Runtime broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsoft_Essentials\Runtime broker.exe

    Filesize

    3.1MB

    MD5

    8cadd9d05b28bdf0f3caeed0ce516d9c

    SHA1

    b6b04039117acc2ffaef424eeaf6d99b4086487f

    SHA256

    7fc8b932158ef8ced6bebf0c254f96cd6cd4cd1a0fd3a90e54652768c477aaf7

    SHA512

    2e1c01240ac20ac2a374926893fa4796d4f4daa8f479c1c55ad62791ca0cb32cc8baf192d849abefc9c1a88d69045f4aeb563105d5d54fcac049b3b8f2ba7fee

  • memory/3344-9-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

    Filesize

    10.8MB

  • memory/3344-11-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

    Filesize

    10.8MB

  • memory/3344-12-0x000000001B1D0000-0x000000001B220000-memory.dmp

    Filesize

    320KB

  • memory/3344-13-0x000000001B840000-0x000000001B8F2000-memory.dmp

    Filesize

    712KB

  • memory/3344-14-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

    Filesize

    10.8MB

  • memory/3344-15-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

    Filesize

    10.8MB

  • memory/4952-0-0x00007FFBAC563000-0x00007FFBAC565000-memory.dmp

    Filesize

    8KB

  • memory/4952-1-0x00000000001C0000-0x00000000004E4000-memory.dmp

    Filesize

    3.1MB

  • memory/4952-2-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

    Filesize

    10.8MB

  • memory/4952-10-0x00007FFBAC560000-0x00007FFBAD021000-memory.dmp

    Filesize

    10.8MB