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
    149s
  • max time network
    125s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-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 39 IoCs
    persistence
  • Disables RegEdit via registry modification 6 IoCs
    defense_evasion
  • Checks computer location settings 2 TTPs 8 IoCs

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

  • Executes dropped EXE 28 IoCs
  • Impair Defenses: Safe Mode Boot 1 TTPs 7 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 10 IoCs

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

  • 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 19 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⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4776
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.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
      • Checks computer location settings
      • 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:580
      • C:\Users\Admin\AppData\Local\Temp\thlqbco.exe
        "C:\Users\Admin\AppData\Local\Temp\thlqbco.exe" "-C:\Users\Admin\AppData\Local\Temp\spcqkupdsrunsyha.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 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:2072
      • C:\Users\Admin\AppData\Local\Temp\thlqbco.exe
        "C:\Users\Admin\AppData\Local\Temp\thlqbco.exe" "-C:\Users\Admin\AppData\Local\Temp\spcqkupdsrunsyha.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:3296
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.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:4748
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2092
  • C:\Windows\zxlavgcrhhlflscwl.exe
    zxlavgcrhhlflscwl.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:940
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\zxlavgcrhhlflscwl.exe*."
      2⤵
      • Executes dropped EXE
      PID:224
  • C:\Users\Admin\AppData\Local\Temp\ttjaxkizrtzvdmyullb.exe
    C:\Users\Admin\AppData\Local\Temp\ttjaxkizrtzvdmyullb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3620
  • C:\Windows\ghyqocbtmpwtcmzwopgy.exe
    ghyqocbtmpwtcmzwopgy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2596
  • C:\Windows\vxpihwwpjnvtdocatvngf.exe
    vxpihwwpjnvtdocatvngf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3176
  • C:\Windows\ttjaxkizrtzvdmyullb.exe
    ttjaxkizrtzvdmyullb.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2972
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\ttjaxkizrtzvdmyullb.exe*."
      2⤵
      • Executes dropped EXE
      PID:1184
  • C:\Users\Admin\AppData\Local\Temp\spcqkupdsrunsyha.exe
    C:\Users\Admin\AppData\Local\Temp\spcqkupdsrunsyha.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3832
  • C:\Windows\ihwmiurhyzezgozukj.exe
    ihwmiurhyzezgozukj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2580
  • C:\Users\Admin\AppData\Local\Temp\ihwmiurhyzezgozukj.exe
    C:\Users\Admin\AppData\Local\Temp\ihwmiurhyzezgozukj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2632
  • C:\Windows\spcqkupdsrunsyha.exe
    spcqkupdsrunsyha.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3980
  • C:\Windows\vxpihwwpjnvtdocatvngf.exe
    vxpihwwpjnvtdocatvngf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2416
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\vxpihwwpjnvtdocatvngf.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:1288
  • C:\Users\Admin\AppData\Local\Temp\ghyqocbtmpwtcmzwopgy.exe
    C:\Users\Admin\AppData\Local\Temp\ghyqocbtmpwtcmzwopgy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4004
  • C:\Windows\ghyqocbtmpwtcmzwopgy.exe
    ghyqocbtmpwtcmzwopgy.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4952
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\ghyqocbtmpwtcmzwopgy.exe*."
      2⤵
      • Executes dropped EXE
      PID:4680
  • C:\Users\Admin\AppData\Local\Temp\vxpihwwpjnvtdocatvngf.exe
    C:\Users\Admin\AppData\Local\Temp\vxpihwwpjnvtdocatvngf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4696
  • C:\Users\Admin\AppData\Local\Temp\zxlavgcrhhlflscwl.exe
    C:\Users\Admin\AppData\Local\Temp\zxlavgcrhhlflscwl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:828
  • C:\Windows\ihwmiurhyzezgozukj.exe
    ihwmiurhyzezgozukj.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2924
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\ihwmiurhyzezgozukj.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:4340
  • C:\Windows\zxlavgcrhhlflscwl.exe
    zxlavgcrhhlflscwl.exe
    1⤵
    • Executes dropped EXE
    PID:4920
  • C:\Windows\spcqkupdsrunsyha.exe
    spcqkupdsrunsyha.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4432
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\spcqkupdsrunsyha.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:2900
  • C:\Windows\ttjaxkizrtzvdmyullb.exe
    ttjaxkizrtzvdmyullb.exe
    1⤵
    • Executes dropped EXE
    PID:1300

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        T1082

        System Location Discovery

        1
        T1614

        System Language Discovery

        1
        T1614.001

        Lateral Movement

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        pjhvvwaoztr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
        • Size 320KB
        • SHA256 ef5b19c330ed31437f579418ad5981e4c779b3f2cb0aedfc725249e7a87ac3f4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        thlqbco.exe
        • Path C:\Users\Admin\AppData\Local\Temp\thlqbco.exe
        • Size 716KB
        • SHA256 563a99c105b89c04d7be68d71a6735d13724bdbb5c6291deecf9b0fbf32897ab
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mxyaigpruhyfyspwyjkmusbdgt.rke
        • Path C:\Users\Admin\AppData\Local\mxyaigpruhyfyspwyjkmusbdgt.rke
        • Size 280B
        • SHA256 2ccdba5cf389b4c71431ad6b85147cafb9fd00541c524330d7a1b87b5782af21
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        njvibkerfdfxbgogtpbohqkxljldhmumzvhun.qdr
        • Path C:\Users\Admin\AppData\Local\njvibkerfdfxbgogtpbohqkxljldhmumzvhun.qdr
        • Size 4KB
        • SHA256 f0483b898f6a4ac9fe0e11a2e298a828ce393e7b2a2bbb93b115226a560cbe00
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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