Analysis

  • user interaction
    yes
  • max time kernel
    148s
  • max time network
    137s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/08/2026, 18:40

General

  • Target
    Debug/net8.0-windows/JHNM_PowerShell.exe
  • Size 148KB
  • Sample260822-xbchcsszhs
  • SHA256 3a3ac7d29150412e7a3341c035f81f11ab220b6a4593015559d4f82e57b50f8c
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Disables one or more Microsoft Defender components 1 TTPs 2 IoCs

    Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

  • Enumerates connected drives 3 TTPs 46 IoCs

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

  • Drops file in Windows directory 1 IoCs
  • Executes a command shell one-liner 1 TTPs 4 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies registry class 2 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\Debug\net8.0-windows\JHNM_PowerShell.exe
    "C:\Users\Admin\AppData\Local\Temp\Debug\net8.0-windows\JHNM_PowerShell.exe"
    1⤵
    • Disables RegEdit via registry modification
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:4648
    • C:\Windows\SYSTEM32\notepad.exe
      "notepad.exe" C:\Users\Admin\Desktop\README.txt
      2⤵
      • Modifies registry class
      • Opens file in notepad (likely ransom note)
      PID:3844
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c vssadmin delete shadows /all /quiet
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:4056
      • C:\Windows\system32\vssadmin.exe
        vssadmin delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2996
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c wmic shadowcopy delete
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:4524
      • C:\Windows\System32\Wbem\WMIC.exe
        wmic shadowcopy delete
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2396
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c powershell Set-MpPreference -DisableRealtimeMonitoring $true
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:4468
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell Set-MpPreference -DisableRealtimeMonitoring $true
        3⤵
        • Disables one or more Microsoft Defender components
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:5728
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c powershell Set-MpPreference -DisableBehaviorMonitoring $true
      2⤵
      • Executes a command shell one-liner
      • Suspicious use of WriteProcessMemory
      PID:5312
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell Set-MpPreference -DisableBehaviorMonitoring $true
        3⤵
        • Disables one or more Microsoft Defender components
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:6076
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4696
  • C:\Users\Admin\AppData\Local\Temp\Debug\net8.0-windows\JHNM_PowerShell.dll
    C:\Users\Admin\AppData\Local\Temp\Debug\net8.0-windows\JHNM_PowerShell.dll
    1⤵
      PID:1688
    • C:\Program Files (x86)\Windows Media Player\wmplayer.exe
      "C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Enqueue -Embedding
      1⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3008
      • C:\Windows\SysWOW64\unregmp2.exe
        "C:\Windows\System32\unregmp2.exe" /AsyncFirstLogon
        2⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:5300
        • C:\Windows\system32\unregmp2.exe
          "C:\Windows\SysNative\unregmp2.exe" /AsyncFirstLogon /REENTRANT
          3⤵
          • Enumerates connected drives
          PID:3700
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 3136
        2⤵
        • Program crash
        PID:3728
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc
      1⤵
        PID:2980
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation -p -s upnphost
        1⤵
        • Drops file in Windows directory
        PID:804
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 3008 -ip 3008
        1⤵
          PID:5772

        Network

              MITRE ATT&CK Enterprise v16

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              CurrentDatabase_400.wmdb

              • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
              • Size 576KB
              • SHA256 da7351fb146be5bce0e5409535fd9a700af07ac5abd3151a45b1c4999c159b41
              • MD5 SHA1 SHA512 SSDEEP TLSH

              CurrentDatabase_400.wmdb

              • Path C:\Users\Admin\AppData\Local\Microsoft\Media Player\CurrentDatabase_400.wmdb
              • Size 1024KB
              • SHA256 c61a43d594c9a7c211439a75f0651313001fe18b8599f36ba7416f2acff4334f
              • MD5 SHA1 SHA512 SSDEEP TLSH

              WMSDKNS.XML.bak

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows Media\12.0\WMSDKNS.XML.bak
              • Size 9KB
              • SHA256 cb87767c4a384c24e4a0f88455f59101b1ae7b4fb8de8a5adb4136c5f7ee545b
              • MD5 SHA1 SHA512 SSDEEP TLSH

              StartupProfileData-NonInteractive

              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
              • Size 1KB
              • SHA256 e56f4a38e0c60f0196c589e1952198368a10927e65ff24d1476ffafc489657f4
              • MD5 SHA1 SHA512 TLSH

              __PSScriptPolicyTest_uapnhkjr.tk2.ps1

              • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_uapnhkjr.tk2.ps1
              • Size 60B
              • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
              • MD5 SHA1 SHA512 TLSH

              wmsetup.log

              • Path C:\Users\Admin\AppData\Local\Temp\wmsetup.log
              • Size 1KB
              • SHA256 ea30a61a29b7c0c8500ab32425b165de7667bab9f850a8e8de2d8173081d707b
              • MD5 SHA1 SHA512 TLSH

              74d7f43c1561fc1e.customDestinations-ms

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\74d7f43c1561fc1e.customDestinations-ms
              • Size 3KB
              • SHA256 cbc11eb48172affe009e9a79582de8bfb5e5b36a0a06393bab866a8dc04da093
              • MD5 SHA1 SHA512 TLSH

              74d7f43c1561fc1e.customDestinations-ms

              • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\74d7f43c1561fc1e.customDestinations-ms
              • Size 1KB
              • SHA256 bfe207b4d701b4ea283de6ad980ab77c4c5cdd4c432ed81645a22d7454a45037
              • MD5 SHA1 SHA512 TLSH

              README.txt

              • Path C:\Users\Admin\Desktop\README.txt
              • Size 121B
              • SHA256 4db73f914a1494bbb05cfd1e57ccddbafaead2f33fd6b6c1db742d21392f0370
              • MD5 SHA1 SHA512 TLSH

              memory/1688-130-0x000001D5BAF10000-0x000001D5BAF1A000-memory.dmp

              memory/3008-204-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-210-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-178-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-179-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-180-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-181-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-182-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-184-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-183-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-185-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-187-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-186-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-190-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-189-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-188-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-191-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-192-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-195-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-194-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-193-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-197-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-196-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-198-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-200-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-199-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-202-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-201-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-205-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-176-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-203-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-207-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-206-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-209-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-177-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-208-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-212-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-211-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-214-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-215-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-213-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-217-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-216-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-219-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-220-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-218-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-222-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-221-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-224-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-225-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-223-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-227-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-226-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-229-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-230-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-228-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-232-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-231-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-233-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-235-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/3008-234-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-237-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-236-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-238-0x0000000009860000-0x0000000009870000-memory.dmp

              memory/3008-175-0x0000000009850000-0x0000000009860000-memory.dmp

              memory/5728-127-0x000001DEF59F0000-0x000001DEF5A12000-memory.dmp

              memory/5728-133-0x000001DEF5A50000-0x000001DEF5A6E000-memory.dmp

              memory/5728-134-0x000001DEF5E10000-0x000001DEF5EC2000-memory.dmp

              memory/5728-137-0x000001DEF5A70000-0x000001DEF5A7A000-memory.dmp