Analysis

  • max time kernel
    130s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    18/08/2024, 22:04

General

  • Target

    Client-built.exe

  • Size

    3.4MB

  • MD5

    bc04ef1699a3b490ff2703a0bb2dcca0

  • SHA1

    b3f70784fb7c7ef0a3cca81280ede2ffe2671e35

  • SHA256

    844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983

  • SHA512

    e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1

  • SSDEEP

    49152:xei8dGFjxJFp/DGoye3Z4LVYcl9v6igI2VSG3THHB72eh2NTfXDW:xeCFjxJTbGor3Z4LVY9r+JT

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:10340

Mutex

9b51d4f5-bfe4-4a06-ba47-dcfbf9fe8529

Attributes
  • encryption_key

    9E968F05BD874BA1BE086FD1774A027473823F49

  • install_name

    Windows Host Process.exe

  • log_directory

    Windows-Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Host Process

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 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 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\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2484
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2812
    • C:\Windows\system32\Windows\Windows Host Process.exe
      "C:\Windows\system32\Windows\Windows Host Process.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2716
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2828

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\System32\Windows\Windows Host Process.exe

    Filesize

    3.4MB

    MD5

    bc04ef1699a3b490ff2703a0bb2dcca0

    SHA1

    b3f70784fb7c7ef0a3cca81280ede2ffe2671e35

    SHA256

    844f43264b78b25a6526ab5f9997cca8243f67d51400f2abd4fd3c777b5fb983

    SHA512

    e3d11bd54f4409c3a846e6466063d5e29f8222b3c2a2291b19401632a7a3884ed6bde8327c664f2b43e6e67914fca1eae4805730adbfd37706ac4d7e0a28a2e1

  • memory/2484-0-0x000007FEF59E3000-0x000007FEF59E4000-memory.dmp

    Filesize

    4KB

  • memory/2484-1-0x0000000000010000-0x0000000000370000-memory.dmp

    Filesize

    3.4MB

  • memory/2484-2-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2484-10-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2716-8-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2716-9-0x0000000000950000-0x0000000000CB0000-memory.dmp

    Filesize

    3.4MB

  • memory/2716-11-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB

  • memory/2716-12-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

    Filesize

    9.9MB