Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    18/08/2024, 21:19

General

  • Target

    Client-built.exe

  • Size

    3.3MB

  • MD5

    449c9192baa7503151f8bb30aa32153b

  • SHA1

    3906a9de42cb337d89e49542660f38144138d7ba

  • SHA256

    2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8

  • SHA512

    c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624

  • SSDEEP

    49152:N6LFXL5Z8hlPKxXavYPBdjSx7sx+5I2jEyTHHB72eh2NT1:N6p5Z8hlPKxXavIXc7sx0ux

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:6712

Mutex

9dcff5fc-a88b-409b-a00a-590c080de54a

Attributes
  • encryption_key

    36CF4D30A4E867DAD17ECBDA8EC17D90EA239A59

  • 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 FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 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:2676
    • 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:796
    • 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 FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2152
      • 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:2252

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.3MB

    MD5

    449c9192baa7503151f8bb30aa32153b

    SHA1

    3906a9de42cb337d89e49542660f38144138d7ba

    SHA256

    2d43f484fc7f954ecd5da337017ab2eb58c26ef39ec07e9bf5d53af63c9c4db8

    SHA512

    c1fe393d34f2af903c755c9d18faeb71193ef6ceb285d1900c2b6df1798346f927367ab32c5b2de5f39e47b781f8a94224642effe2400323f7a0153a0c7fa624

  • memory/2152-8-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2152-9-0x0000000000AB0000-0x0000000000E08000-memory.dmp

    Filesize

    3.3MB

  • memory/2152-11-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2152-12-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2676-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

    Filesize

    4KB

  • memory/2676-1-0x0000000000F70000-0x00000000012C8000-memory.dmp

    Filesize

    3.3MB

  • memory/2676-2-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

    Filesize

    9.9MB

  • memory/2676-10-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

    Filesize

    9.9MB