Overview

overview

10

Static

static

10

Onimai.exe

windows10-2004-x64

10

Onimai.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    116s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260618-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260618-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/06/2026, 02:22

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General

  • Target
    Onimai.exe
  • Size 3.2MB
  • Sample260622-ctrpsagw5k
  • SHA256 5680ea38be73be47065a88055bbe291f15b7a759b44574353ae7eaf1fd66b512
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwarequasarpersistenceransomwarespywaretrojan

Malware Config

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar payload 2 IoCs
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 40 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 61 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 1 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.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\Onimai.exe
    "C:\Users\Admin\AppData\Local\Temp\Onimai.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:6080
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:3268
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:4504
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3640
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:5688
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:1336

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          prep_Activatable Class_Hermes_perf.cache
          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
          • Size 599B
          • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          memory/3640-27-0x000001F0801E0000-0x000001F0802E0000-memory.dmp
          Download

          memory/3640-40-0x000001F083930000-0x000001F083950000-memory.dmp
          Download

          memory/3640-56-0x000001F083B90000-0x000001F083BB0000-memory.dmp
          Download

          memory/3640-41-0x000001F093D90000-0x000001F093E90000-memory.dmp
          Download

          memory/3640-73-0x000001F0946A0000-0x000001F0946C0000-memory.dmp
          Download

          memory/3640-29-0x000001F0801E0000-0x000001F0802E0000-memory.dmp
          Download

          memory/4504-193-0x000000000A130000-0x000000000A2BE000-memory.dmp
          Download

          memory/6080-3-0x000001FE35B50000-0x000001FE35B68000-memory.dmp
          Download

          memory/6080-6-0x00007FFD1DBD0000-0x00007FFD1E574000-memory.dmp
          Download

          memory/6080-5-0x00007FFD1DBD0000-0x00007FFD1E574000-memory.dmp
          Download

          memory/6080-4-0x00007FFD1DBD0000-0x00007FFD1E574000-memory.dmp
          Download

          memory/6080-0-0x00007FFD1DD5F000-0x00007FFD1DD60000-memory.dmp
          Download

          memory/6080-2-0x00007FFD1DBD0000-0x00007FFD1E574000-memory.dmp
          Download

          memory/6080-1-0x000001FE35380000-0x000001FE356C2000-memory.dmp
          Download