Overview

overview

8

Static

static

3

chacobot (...on.dll

windows10-2004-x64

1

chacobot (...on.dll

windows11-ltsc_2024-x64

1

chacobot (...ec.dll

windows10-2004-x64

1

chacobot (...ec.dll

windows11-ltsc_2024-x64

1

chacobot (1)/bz2.dll

windows10-2004-x64

1

chacobot (1)/bz2.dll

windows11-ltsc_2024-x64

1

chacobot (...ot.exe

windows10-2004-x64

3

chacobot (...ot.exe

windows11-ltsc_2024-x64

8

chacobot (...pe.dll

windows10-2004-x64

1

chacobot (...pe.dll

windows11-ltsc_2024-x64

1

chacobot (...rl.dll

windows10-2004-x64

1

chacobot (...rl.dll

windows11-ltsc_2024-x64

1

chacobot (...16.dll

windows10-2004-x64

1

chacobot (...16.dll

windows11-ltsc_2024-x64

8

chacobot (...sh.dll

windows10-2004-x64

1

chacobot (...sh.dll

windows11-ltsc_2024-x64

1

chacobot (...b1.dll

windows10-2004-x64

1

chacobot (...b1.dll

windows11-ltsc_2024-x64

8

chacobot (1)/zstd.dll

windows10-2004-x64

1

chacobot (1)/zstd.dll

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    899s
  • max time network
    549s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    01/11/2026, 22:31

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General

  • Target
    chacobot (1)/zlib1.dll
  • Size 86KB
  • Sample261101-2fnteadw7v
  • SHA256 16214e465d14ed2badb0bfb00ed2f9797ca9bb5f380e463d464caf9c55ebe2e5
  • 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
  • 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 30 IoCs
  • Suspicious use of FindShellTrayWindow 54 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:\Windows\system32\rundll32.exe
    rundll32.exe "C:\Users\Admin\AppData\Local\Temp\chacobot (1)\zlib1.dll",#1
    1⤵
      PID:4912
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k GPSvcGroup
      1⤵
        PID:3404
      • C:\Windows\system32\sihost.exe
        sihost.exe
        1⤵
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of WriteProcessMemory
        PID:4508
        • 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:3524
      • 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:4936
      • 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:4044
      • C:\Windows\System32\SecurityHealthHost.exe
        \\?\C:\Windows\System32\SecurityHealthHost.exe {08728914-3F57-4D52-9E31-49DAECA5A80A} -Embedding
        1⤵
          PID:2728

        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

              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 591B
              • SHA256 dc216c11d6381abdcb6a4b927fd9ea68d336ff63c88639e4a242acf037f90c68
              • MD5 SHA1 SHA512 TLSH
              Submit Download

              memory/3524-193-0x000000000EFB0000-0x000000000F82B000-memory.dmp
              Download

              memory/3524-223-0x000000000EFB0000-0x000000000F82B000-memory.dmp
              Download

              memory/4936-22-0x00000224801E0000-0x00000224802E0000-memory.dmp
              Download

              memory/4936-68-0x0000022494180000-0x00000224941A0000-memory.dmp
              Download

              memory/4936-49-0x0000022483C00000-0x0000022483C20000-memory.dmp
              Download

              memory/4936-37-0x0000022493E00000-0x0000022493F00000-memory.dmp
              Download

              memory/4936-36-0x00000224839B0000-0x00000224839D0000-memory.dmp
              Download