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Analysis

  • max time kernel
    121s
  • max time network
    131s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    03/02/2025, 12:54

General

  • Target

    Payment010225.exe

  • Size

    951KB

  • MD5

    b76d3e743d68ca1e3f04d641bfcc3ec7

  • SHA1

    d2d4fea6920a1a737199ce0fcac7c44adb5d7bd8

  • SHA256

    72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c

  • SHA512

    c1e29917358740c56e9c83a0a5e8ea48d368806a0b71b2a240df9f5568cb7dc0d7b18e2959fe5b40d4ada2733594b6c17e705f6181c3a38eeaa1efd0ab24558b

  • SSDEEP

    24576:JPzFQtxBAb2JewjA/s5TqKnNiw0RALH0+XxryrSwg2J:1FC+2jpnNiRSXxqgM

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Stroy

C2

109.248.151.166:61537

Mutex

QSR_MUTEX_uHD8seWaFzpqqYxRLX

Attributes
  • encryption_key

    IR3AcRhjtuelpwNmTP7v

  • install_name

    Updater.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of SetThreadContext 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 4 IoCs
  • Suspicious use of WriteProcessMemory 57 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Payment010225.exe
    "C:\Users\Admin\AppData\Local\Temp\Payment010225.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2168
    • C:\Users\Admin\AppData\Local\Temp\Payment010225.exe
      C:\Users\Admin\AppData\Local\Temp\Payment010225.exe
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2016
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Payment010225.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2836
      • C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
        "C:\Users\Admin\AppData\Roaming\Windows\Updater.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2768
        • C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
          C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2632
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\Updater.exe" /rl HIGHEST /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2892
        • C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
          C:\Users\Admin\AppData\Roaming\Windows\Updater.exe
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          PID:2588
    • C:\Users\Admin\AppData\Local\Temp\Payment010225.exe
      C:\Users\Admin\AppData\Local\Temp\Payment010225.exe
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1628

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Roaming\Windows\Updater.exe

    Filesize

    951KB

    MD5

    b76d3e743d68ca1e3f04d641bfcc3ec7

    SHA1

    d2d4fea6920a1a737199ce0fcac7c44adb5d7bd8

    SHA256

    72209f1e92435b27f56db50ee9db7b82ebb11a6fb37ea5ade6cda13fc2c0d00c

    SHA512

    c1e29917358740c56e9c83a0a5e8ea48d368806a0b71b2a240df9f5568cb7dc0d7b18e2959fe5b40d4ada2733594b6c17e705f6181c3a38eeaa1efd0ab24558b

  • memory/1628-19-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/1628-17-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/1628-15-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2016-8-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2016-4-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2016-6-0x0000000000400000-0x000000000045E000-memory.dmp

    Filesize

    376KB

  • memory/2016-18-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2016-14-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2016-27-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2168-2-0x0000000006DA0000-0x0000000006EB0000-memory.dmp

    Filesize

    1.1MB

  • memory/2168-16-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2168-3-0x00000000746C0000-0x0000000074DAE000-memory.dmp

    Filesize

    6.9MB

  • memory/2168-0-0x00000000746CE000-0x00000000746CF000-memory.dmp

    Filesize

    4KB

  • memory/2168-1-0x0000000000EB0000-0x0000000000FA4000-memory.dmp

    Filesize

    976KB

  • memory/2768-26-0x0000000000A20000-0x0000000000B14000-memory.dmp

    Filesize

    976KB