Overview

overview

10

Static

static

3

tmp385d_ntg.exe

windows10-ltsc_2021-x64

10

tmp385d_ntg.exe

windows10-2004-x64

10

tmp385d_ntg.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    22/05/2026, 14:02

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General

  • Target
    tmp385d_ntg.exe
  • Size 1016KB
  • Sample260522-rb4nysc18n
  • SHA256 46022e427a9e70e3d95fb9ddb016003d442d862942d08ed327f5d4c9133b05a9
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defense_evasiondiscoverypykspapersistenceprivilege_escalationtrojanworm

Malware Config

Signatures

  • Family: Pykspa

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

    wormpykspa
  • Detect Pykspa worm 2 IoCs
    worm
  • Modifies WinLogon for persistence 2 TTPs 7 IoCs
    persistence
  • UAC bypass 3 TTPs 16 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 37 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    defense_evasion
  • Executes dropped EXE 28 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 6 IoCs
    defense_evasion
  • Adds Run key to start application 2 TTPs 64 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 14 IoCs
    defense_evasiontrojan
  • Hijack Execution Flow: Executable Installer File Permissions Weakness 1 TTPs 3 IoCs

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

    defense_evasionpersistenceprivilege_escalation
  • Looks up external IP address via web service 4 IoCs

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

  • Drops autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 53 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 53 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 18 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 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • System policy modification 1 TTPs 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp385d_ntg.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp385d_ntg.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2656
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmp385d_ntg.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2660
      • C:\Users\Admin\AppData\Local\Temp\lpscip.exe
        "C:\Users\Admin\AppData\Local\Temp\lpscip.exe" "-C:\Users\Admin\AppData\Local\Temp\xlysizlhyjmvqtxc.exe"
        3⤵
        • 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 autorun.inf file
        • Drops file in System32 directory
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • System policy modification
        PID:2736
      • C:\Users\Admin\AppData\Local\Temp\lpscip.exe
        "C:\Users\Admin\AppData\Local\Temp\lpscip.exe" "-C:\Users\Admin\AppData\Local\Temp\xlysizlhyjmvqtxc.exe"
        3⤵
        • 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
        • Drops file in System32 directory
        • Drops file in Windows directory
        • System policy modification
        PID:1724
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmp385d_ntg.exe"
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:4828
  • C:\Windows\ypfcvpedxlrdbhowlhc.exe
    ypfcvpedxlrdbhowlhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4884
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5012
  • C:\Users\Admin\AppData\Local\Temp\ldusmhxxshobahpyolhz.exe
    C:\Users\Admin\AppData\Local\Temp\ldusmhxxshobahpyolhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3468
  • C:\Windows\xlysizlhyjmvqtxc.exe
    xlysizlhyjmvqtxc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3796
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\xlysizlhyjmvqtxc.exe*."
      2⤵
      • Executes dropped EXE
      PID:1700
  • C:\Windows\xlysizlhyjmvqtxc.exe
    xlysizlhyjmvqtxc.exe
    1⤵
    • Executes dropped EXE
    PID:656
  • C:\Users\Admin\AppData\Local\Temp\ndsogznlerwhejpwkf.exe
    C:\Users\Admin\AppData\Local\Temp\ndsogznlerwhejpwkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3136
  • C:\Windows\atlkfbstpfnbbjsctrohz.exe
    atlkfbstpfnbbjsctrohz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4920
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\atlkfbstpfnbbjsctrohz.exe*."
      2⤵
      • Executes dropped EXE
      PID:3508
  • C:\Users\Admin\AppData\Local\Temp\xlysizlhyjmvqtxc.exe
    C:\Users\Admin\AppData\Local\Temp\xlysizlhyjmvqtxc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3228
  • C:\Windows\ndsogznlerwhejpwkf.exe
    ndsogznlerwhejpwkf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4032
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ndsogznlerwhejpwkf.exe*."
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:1344
  • C:\Windows\ethctlyvnzdnjnsyl.exe
    ethctlyvnzdnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2556
  • C:\Windows\atlkfbstpfnbbjsctrohz.exe
    atlkfbstpfnbbjsctrohz.exe
    1⤵
    • Executes dropped EXE
    PID:928
  • C:\Windows\ldusmhxxshobahpyolhz.exe
    ldusmhxxshobahpyolhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1448
  • C:\Windows\ethctlyvnzdnjnsyl.exe
    ethctlyvnzdnjnsyl.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4572
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ethctlyvnzdnjnsyl.exe*."
      2⤵
      • Executes dropped EXE
      PID:1616
  • C:\Users\Admin\AppData\Local\Temp\atlkfbstpfnbbjsctrohz.exe
    C:\Users\Admin\AppData\Local\Temp\atlkfbstpfnbbjsctrohz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4108
  • C:\Windows\ldusmhxxshobahpyolhz.exe
    ldusmhxxshobahpyolhz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ldusmhxxshobahpyolhz.exe*."
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:2160
  • C:\Users\Admin\AppData\Local\Temp\ypfcvpedxlrdbhowlhc.exe
    C:\Users\Admin\AppData\Local\Temp\ypfcvpedxlrdbhowlhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2584
  • C:\Windows\ypfcvpedxlrdbhowlhc.exe
    ypfcvpedxlrdbhowlhc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ypfcvpedxlrdbhowlhc.exe*."
      2⤵
      • Modifies WinLogon for persistence
      • UAC bypass
      • Adds policy Run key to start application
      • Executes dropped EXE
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:4852
  • C:\Users\Admin\AppData\Local\Temp\ethctlyvnzdnjnsyl.exe
    C:\Users\Admin\AppData\Local\Temp\ethctlyvnzdnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4376
  • C:\Windows\ndsogznlerwhejpwkf.exe
    ndsogznlerwhejpwkf.exe
    1⤵
    • Executes dropped EXE
    PID:4912

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Replication Through Removable Media

        1
        T1091

        Execution

        Persistence

        Boot or Logon Autostart Execution

        3
        T1547

        Registry Run Keys / Startup Folder

        2
        T1547.001

        Winlogon Helper DLL

        1
        T1547.004

        Hijack Execution Flow

        1
        T1574

        Executable Installer File Permissions Weakness

        1
        T1574.005

        Privilege Escalation

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Boot or Logon Autostart Execution

        3
        T1547

        Registry Run Keys / Startup Folder

        2
        T1547.001

        Winlogon Helper DLL

        1
        T1547.004

        Hijack Execution Flow

        1
        T1574

        Executable Installer File Permissions Weakness

        1
        T1574.005

        Defense Evasion

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Hijack Execution Flow

        1
        T1574

        Executable Installer File Permissions Weakness

        1
        T1574.005

        Impair Defenses

        2
        T1562

        Disable or Modify Tools

        1
        T1562.001

        Safe Mode Boot

        1
        T1562.009

        Modify Registry

        5
        T1112

        Credential Access

        Discovery

        System Information Discovery

        2
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Replication Through Removable Media

        1
        T1091

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        rtucgllvazqnwnfyyflnowaffp.tkh
        • Path C:\Program Files (x86)\rtucgllvazqnwnfyyflnowaffp.tkh
        • Size 280B
        • SHA256 d3645721143a8e408db9dd9a630881f08493711021c37eeacdcf2bc2572e80b5
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rtucgllvazqnwnfyyflnowaffp.tkh
        • Path C:\Program Files (x86)\rtucgllvazqnwnfyyflnowaffp.tkh
        • Size 280B
        • SHA256 537fe090568b0c20d809e8e17e819e25387e280957a290db701fb8e290c5b2f4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rtucgllvazqnwnfyyflnowaffp.tkh
        • Path C:\Program Files (x86)\rtucgllvazqnwnfyyflnowaffp.tkh
        • Size 280B
        • SHA256 516795c1200b5f636ee2b5c4d9f0625709f3f32445bb89679d7bd2fa089962c2
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rtucgllvazqnwnfyyflnowaffp.tkh
        • Path C:\Program Files (x86)\rtucgllvazqnwnfyyflnowaffp.tkh
        • Size 280B
        • SHA256 9e0d3c645075fe323ac98dbe0539e2269abdda43b5dd71aecdb4f9ade8b492ce
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dhxvuubpnrh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
        • Size 320KB
        • SHA256 aa61be2fb4ca5d9929ec8bdc5b21e9443e11164da228fb797dcc505aaabbfdd3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        lpscip.exe
        • Path C:\Users\Admin\AppData\Local\Temp\lpscip.exe
        • Size 704KB
        • SHA256 ead7bf678c8b972bc114ad80582401e231b5673d47619a6178081c450345f9a3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        rtucgllvazqnwnfyyflnowaffp.tkh
        • Path C:\Users\Admin\AppData\Local\rtucgllvazqnwnfyyflnowaffp.tkh
        • Size 280B
        • SHA256 64466534211c78427bdbc8d0eb6208f127691ba8519b2e5103c292fe893f0971
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rtucgllvazqnwnfyyflnowaffp.tkh
        • Path C:\Users\Admin\AppData\Local\rtucgllvazqnwnfyyflnowaffp.tkh
        • Size 280B
        • SHA256 68384cbc17c9e8802d828dd7d55d49ebde506f0c88346eef44d48bd3392f2dcf
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sfrkzpavlvxfzbeitlcpbujzkfvfhpjlosdvm.let
        • Path C:\Users\Admin\AppData\Local\sfrkzpavlvxfzbeitlcpbujzkfvfhpjlosdvm.let
        • Size 4KB
        • SHA256 53e091d7146181739989766edf7f1e805d743e11898d98e9c97495034a926c50
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ndsogznlerwhejpwkf.exe
        • Path C:\Windows\SysWOW64\ndsogznlerwhejpwkf.exe
        • Size 1016KB
        • SHA256 46022e427a9e70e3d95fb9ddb016003d442d862942d08ed327f5d4c9133b05a9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        xfmakvbrch.bat
        • Path C:\xfmakvbrch.bat
        • Size 544KB
        • SHA256 f2c396c11df58667f8591b6ceb75227e7f1ec4d2273bbf196be61686e624667f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download