Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/06/2026, 02:50

General

  • Target
    tmp0omrvgyc.exe
  • Size 320KB
  • Sample260602-db116sdw3p
  • SHA256 39f6f0fff5a419129816a2fdb72aa88140da16482f788485ec27ede07e030b1f
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Pykspa

    Pykspa is a worm spreads via Skype uses DGA and it's written in C++.

  • Detect Pykspa worm 1 IoCs
  • Modifies WinLogon for persistence 2 TTPs 3 IoCs
  • UAC bypass 3 TTPs 12 IoCs
  • Adds policy Run key to start application 2 TTPs 27 IoCs
  • Disables RegEdit via registry modification 6 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 64 IoCs
  • Checks whether UAC is enabled 1 TTPs 6 IoCs
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 3 IoCs

    Possible Turn off User Account Control's privilege elevation for standard users.

  • Looks up external IP address via web service 7 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 4 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 4 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.

  • Modifies registry class 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • System policy modification 1 TTPs 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp0omrvgyc.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp0omrvgyc.exe"
    1⤵
    • Modifies WinLogon for persistence
    • UAC bypass
    • Adds policy Run key to start application
    • Disables RegEdit via registry modification
    • Checks computer location settings
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Hijack Execution Flow: Executable Installer File Permissions Weakness
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4860
    • C:\Users\Admin\AppData\Local\Temp\wdlmq.exe
      "C:\Users\Admin\AppData\Local\Temp\wdlmq.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Impair Defenses: Safe Mode Boot
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • Drops file in System32 directory
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • System policy modification
      PID:1192
    • C:\Users\Admin\AppData\Local\Temp\wdlmq.exe
      "C:\Users\Admin\AppData\Local\Temp\wdlmq.exe" "-"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Hijack Execution Flow: Executable Installer File Permissions Weakness
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious behavior: GetForegroundWindowSpam
      • System policy modification
      PID:4744
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4772
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:5040

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

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          Downloads

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Program Files (x86)\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 2c3f59882f88a380920a1503c7c1685fa7e3f2dff4804734beb6e081e2cb8b37
          • MD5 SHA1 SHA512 TLSH

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Program Files (x86)\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 5f652ef1c66d279b77bd18f4e1bc6f435bf79603dc15b84f2cdde7151b6806f0
          • MD5 SHA1 SHA512 TLSH

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Program Files (x86)\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 edd18d5659aed60916b4a22f8abed828ec39ef3753b5be24491fd0d7693f2588
          • MD5 SHA1 SHA512 TLSH

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Program Files (x86)\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 5de48151b4f05e6e7b41b16eca03bd46f6b979d086642d900aa7dbcc090c4f7a
          • MD5 SHA1 SHA512 TLSH

          wdlmq.exe

          • Path C:\Users\Admin\AppData\Local\Temp\wdlmq.exe
          • Size 684KB
          • SHA256 e66346d7ff37f2a326e96c18110d2c33c0085154fc2c9f409e28504b00f6a4c8
          • MD5 SHA1 SHA512 SSDEEP TLSH

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Users\Admin\AppData\Local\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 3d4cbda2f0974e3c485f2fbda8d9de84f7c905b96638b5ab2b9780d6c992fbd2
          • MD5 SHA1 SHA512 TLSH

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Users\Admin\AppData\Local\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 a8883a1c673af3ffb13fda335c9648849d0d611aee80f2b0ec3890adc7f17da7
          • MD5 SHA1 SHA512 TLSH

          bfkijmmvzvkspurnmdlpustw.fjf

          • Path C:\Users\Admin\AppData\Local\bfkijmmvzvkspurnmdlpustw.fjf
          • Size 280B
          • SHA256 a27aa75a1cda826dab93460a1ed17142ac1db7ca03c0b2129a5acea208ea807f
          • MD5 SHA1 SHA512 TLSH

          kzpykyjdszzsaqyfprkzpykyjdszzsaqyfp.kzp

          • Path C:\Users\Admin\AppData\Local\kzpykyjdszzsaqyfprkzpykyjdszzsaqyfp.kzp
          • Size 4KB
          • SHA256 d48d735973696690dd4e89a1cce669936e1bbf39c63ae56d20ce69f119386624
          • MD5 SHA1 SHA512 SSDEEP TLSH