Overview

overview

7

Static

static

3

PEK SC2RS n.exe

windows10-ltsc_2021-x64

PEK SC2RS n.exe

windows10-2004-x64

Analysis

  • max time kernel
    5s
  • max time network
    67s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    17/08/2026, 16:03

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Errors

Reason
Machine shutdown

General

  • Target
    PEK SC2RS n.exe
  • Size 3.7MB
  • Sample260817-thmecsthkb
  • SHA256 c1132a4674d32605b229e21395e5df879215a613a74f37d7d9336bc2e5b98c7c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
bootkitdiscoveryexecutionpersistenceprivilege_escalationransomware

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

    persistenceprivilege_escalation
  • Executes dropped EXE 2 IoCs
  • Modifies system executable filetype association 2 TTPs 34 IoCs
    persistence
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Enumerates physical storage devices 1 TTPs

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

  • Executes a command shell one-liner 1 TTPs 1 IoCs

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

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

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

    discovery
  • Modifies registry class 64 IoCs
  • Suspicious use of WriteProcessMemory 4 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\PEK SC2RS n.exe
    "C:\Users\Admin\AppData\Local\Temp\PEK SC2RS n.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1504
    • C:\Users\Admin\AppData\Roaming\k.exe
      "C:\Users\Admin\AppData\Roaming\k.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Writes to the Master Boot Record (MBR)
      • Suspicious use of WriteProcessMemory
      PID:4832
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /k reg delete HKCR /f
        3⤵
        • Executes a command shell one-liner
        • Suspicious use of WriteProcessMemory
        PID:3096
        • C:\Windows\system32\reg.exe
          reg delete HKCR /f
          4⤵
          • Modifies system executable filetype association
          • Modifies registry class
          PID:3584
      • C:\Users\Admin\AppData\Local\Temp\nasm.exe
        "nasm.exe" -f bin mbr_temp.asm -o mbr_temp.bin
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4352
  • C:\Windows\system32\AUDIODG.EXE
    C:\Windows\system32\AUDIODG.EXE 0x248 0x2f4
    1⤵
      PID:3488

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          mbr_temp.asm
          • Path C:\Users\Admin\AppData\Local\Temp\mbr_temp.asm
          • Size 542B
          • SHA256 378a44d8f353453fda8873cead75632a371a44854a17a83e767a948e36ce1908
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          mbr_temp.bin
          • Path C:\Users\Admin\AppData\Local\Temp\mbr_temp.bin
          • Size 512B
          • SHA256 05fe1a4a235705c6d38713b2652fa137dee988303768d5703dae72d4aa389a11
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          nasm.exe
          • Path C:\Users\Admin\AppData\Local\Temp\nasm.exe
          • Size 1.2MB
          • SHA256 a4735165141570d966b577d594c0541c29baed4978078c1c7237b855f8592a87
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          k.exe
          • Path C:\Users\Admin\AppData\Roaming\k.exe
          • Size 3.2MB
          • SHA256 a4cc5f8ee129eda5160b986a2db4508ce9d8ba9d54ad57b6ab5cde26a28e48c9
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          memory/1504-0-0x00000000000C0000-0x0000000000480000-memory.dmp
          Download

          memory/4352-25-0x0000000000400000-0x0000000000539000-memory.dmp
          Download

          memory/4832-12-0x0000000000180000-0x00000000004C2000-memory.dmp
          Download

          memory/4832-13-0x0000000002560000-0x0000000002570000-memory.dmp
          Download

          memory/4832-33-0x0000000002560000-0x0000000002570000-memory.dmp
          Download