Overview

overview

8

Static

static

3

_55dd76488...87.exe

windows10-2004-x64

8

_55dd76488...87.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    121s
  • max time network
    133s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260629-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260629-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    06/07/2026, 09:14

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General

  • Target
    _55dd76488bdd3ff9530bba5d8a6d4fcb8c67f9a40eb72ab4b48465bfd03a0387.exe
  • Size 13KB
  • Sample260706-k7rwpscz2w
  • SHA256 55dd76488bdd3ff9530bba5d8a6d4fcb8c67f9a40eb72ab4b48465bfd03a0387
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
adwarepersistenceransomwarespyware

Malware Config

Signatures

  • 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
  • Loads dropped DLL 1 IoCs
  • 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 38 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 36 IoCs
  • Suspicious use of FindShellTrayWindow 54 IoCs
  • Suspicious use of SendNotifyMessage 40 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 2 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\_55dd76488bdd3ff9530bba5d8a6d4fcb8c67f9a40eb72ab4b48465bfd03a0387.exe
    "C:\Users\Admin\AppData\Local\Temp\_55dd76488bdd3ff9530bba5d8a6d4fcb8c67f9a40eb72ab4b48465bfd03a0387.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5744
    • C:\Windows\SYSTEM32\rundll32.exe
      rundll32.exe "C:\ProgramData\NyrvexEng\Vessel\qrbguard.dll",RegisterComponent
      2⤵
      • Loads dropped DLL
      PID:5020
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:2636
    • 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:5060
  • 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:5624
  • 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:1908

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        qrbguard.dll
        • Path C:\ProgramData\NyrvexEng\Vessel\qrbguard.dll
        • Size 412KB
        • SHA256 712c79df1239aa51fa677f65b77cbc42f74599ff663d6182abc63a8328ad2f08
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        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 607B
        • SHA256 be6b74e52e5eef1f1c27c0976bf3bf1bfa99958c00bbef2898a602f691be6dae
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/1908-197-0x000002B1806D0000-0x000002B18098C000-memory.dmp
        Download

        memory/1908-206-0x000002B1806D0000-0x000002B18098C000-memory.dmp
        Download

        memory/5624-25-0x00000245001E0000-0x00000245002E0000-memory.dmp
        Download

        memory/5624-69-0x00000245146A0000-0x00000245146C0000-memory.dmp
        Download

        memory/5624-47-0x0000024501C90000-0x0000024501CB0000-memory.dmp
        Download

        memory/5624-35-0x0000024501E70000-0x0000024501F70000-memory.dmp
        Download

        memory/5624-34-0x0000024501A30000-0x0000024501A50000-memory.dmp
        Download

        memory/5624-24-0x00000245001E0000-0x00000245002E0000-memory.dmp
        Download

        memory/5624-23-0x00000245001E0000-0x00000245002E0000-memory.dmp
        Download