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Analysis

  • max time kernel
    126s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    19/01/2025, 20:06

General

  • Target

    e69d5c216f6cf59c3b71b0bf3444803e.exe

  • Size

    3.1MB

  • MD5

    e69d5c216f6cf59c3b71b0bf3444803e

  • SHA1

    e18de0fa930ed0ad786bd3e22c699762d93d3e95

  • SHA256

    3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b

  • SHA512

    92ee6e7c5145b4281aaad5bdbe8f7a90c71ac247918112fbdb7f92256e9c562cdeeb15bb4716ee0dec168db96c1d7631023181ab7e932196effc653b8cb00527

  • SSDEEP

    49152:nvkI22SsaNYfdPBldt698dBcjHfqDybRcboGdj/mTHHB72eh2NT:nvJ22SsaNYfdPBldt6+dBcjHfqDV

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

客户

C2

121.36.102.48:1111

Mutex

043c1c13-ad0b-4e54-a900-6308db7e18c0

Attributes
  • encryption_key

    CBC848F0E8EC6B1B06081D6FFA1D98A8EAB2442E

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    Microsofl

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 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\e69d5c216f6cf59c3b71b0bf3444803e.exe
    "C:\Users\Admin\AppData\Local\Temp\e69d5c216f6cf59c3b71b0bf3444803e.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2124
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2652
    • C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe
      "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2764
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2716

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Microsofl\Client.exe

    Filesize

    3.1MB

    MD5

    e69d5c216f6cf59c3b71b0bf3444803e

    SHA1

    e18de0fa930ed0ad786bd3e22c699762d93d3e95

    SHA256

    3ec670197c9d917b0f258ea9f093289ee2e4b829451b8c9aa8f1d2e7170a2d8b

    SHA512

    92ee6e7c5145b4281aaad5bdbe8f7a90c71ac247918112fbdb7f92256e9c562cdeeb15bb4716ee0dec168db96c1d7631023181ab7e932196effc653b8cb00527

  • memory/2124-0-0x000007FEF5F13000-0x000007FEF5F14000-memory.dmp

    Filesize

    4KB

  • memory/2124-1-0x0000000000810000-0x0000000000B34000-memory.dmp

    Filesize

    3.1MB

  • memory/2124-2-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2124-10-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2764-8-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2764-9-0x0000000000F10000-0x0000000001234000-memory.dmp

    Filesize

    3.1MB

  • memory/2764-11-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

    Filesize

    9.9MB

  • memory/2764-12-0x000007FEF5F10000-0x000007FEF68FC000-memory.dmp

    Filesize

    9.9MB