Overview

overview

10

Static

static

10

lk.exe

windows10-2004-x64

9

lk.exe

windows11-ltsc_2024-x64

9

Resubmissions

08/09/2026, 18:12

260908-wtfgasweph10

02/09/2026, 23:22

260902-3cprzatgnf10

02/09/2026, 16:50

260902-vcqp9sar4w10

30/10/2025, 12:26

251030-pme4maylcr10

Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/09/2026, 23:22

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General

  • Target
    lk.exe
  • Size 145KB
  • Sample260902-3cprzatgnf
  • SHA256 ebd465cbb6b7718f33aac20528ffa75ae4ac433d8ab7c5c7a734c472f1c16a87
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
defense_evasiondiscoveryransomwarespywarestealer

Malware Config

Signatures

  • Renames multiple (489) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Drops desktop.ini file(s) 2 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

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

  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

    defense_evasion
  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
    ransomware
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

    discovery
  • Checks SCSI registry key(s) 3 TTPs 24 IoCs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Control Panel 2 IoCs
    defense_evasion
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\lk.exe
    "C:\Users\Admin\AppData\Local\Temp\lk.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4808
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      • Checks SCSI registry key(s)
      PID:4604
    • C:\ProgramData\36E6.tmp
      "C:\ProgramData\36E6.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:6052
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\36E6.tmp >> NUL
        3⤵
        • System Location Discovery: System Language Discovery
        PID:3148
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
    1⤵
      PID:5680
    • C:\Windows\system32\printfilterpipelinesvc.exe
      C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
      1⤵
      • Drops file in System32 directory
      • Drops file in Windows directory
      • Checks SCSI registry key(s)
      • Suspicious use of WriteProcessMemory
      PID:4376
      • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
        /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{393C5CE3-B5C4-4C94-A21A-D0E8A35045BE}.xps" 134328649604540000
        2⤵
        • Checks processor information in registry
        • Enumerates system info in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        PID:4316

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          AAAAAAAAAAA
          • Path C:\$Recycle.Bin\S-1-5-21-2115213192-531537726-3295841909-1000\AAAAAAAAAAA
          • Size 129B
          • SHA256 7e92e0aca9a25c5cacbd413b6a1f93a313d4eb536dbc120dd88b070bb1ded9ac
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          4TueOK9Mo.README.txt
          • Path C:\4TueOK9Mo.README.txt
          • Size 318B
          • SHA256 603cbba423aab1817da8528204f004379724837b555fd28670f45725b4768fc6
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          36E6.tmp
          • Path C:\ProgramData\36E6.tmp
          • Size 14KB
          • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          DDDDDD
          • Path C:\Users\Admin\AppData\Local\Temp\DDDDDD
          • Size 145KB
          • SHA256 4ed19172763a36c35af4f66ddbeea942b42e7137c59d2cc4ab060ab868f10530
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          Open Notebook.onetoc2
          • Path C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2
          • Size 4KB
          • SHA256 d44c0cead150fa3d954e1714ff85de41d4c0dda73c8ec49d52e540609bd2c002
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          DDDDDDDDDDD
          • Path F:\$RECYCLE.BIN\S-1-5-21-2115213192-531537726-3295841909-1000\DDDDDDDDDDD
          • Size 129B
          • SHA256 e5f37a6381e4df24c027efa596089b4a20faf6332378cbbf86d5859bf98bf6c8
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          memory/4316-947-0x00007FFE7FCE0000-0x00007FFE7FCF0000-memory.dmp
          Download

          memory/4316-948-0x00007FFE7FCE0000-0x00007FFE7FCF0000-memory.dmp
          Download

          memory/4316-946-0x00007FFE7FCE0000-0x00007FFE7FCF0000-memory.dmp
          Download

          memory/4316-945-0x00007FFE7FCE0000-0x00007FFE7FCF0000-memory.dmp
          Download

          memory/4316-944-0x00007FFE7FCE0000-0x00007FFE7FCF0000-memory.dmp
          Download

          memory/4316-954-0x00007FFE7D580000-0x00007FFE7D590000-memory.dmp
          Download

          memory/4316-982-0x00007FFE7D580000-0x00007FFE7D590000-memory.dmp
          Download

          memory/4808-934-0x0000000003310000-0x0000000003320000-memory.dmp
          Download

          memory/4808-1-0x0000000003310000-0x0000000003320000-memory.dmp
          Download

          memory/4808-935-0x0000000003310000-0x0000000003320000-memory.dmp
          Download

          memory/4808-0-0x0000000003310000-0x0000000003320000-memory.dmp
          Download

          memory/4808-2-0x0000000003310000-0x0000000003320000-memory.dmp
          Download