Overview

overview

10

Static

static

3

tmpl3zf8n54.exe

windows10-ltsc_2021-x64

10

tmpl3zf8n54.exe

windows10-2004-x64

10

tmpl3zf8n54.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    124s
  • 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, 03:47

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General

  • Target
    tmpl3zf8n54.exe
  • Size 812KB
  • Sample260602-ecjzqaew5p
  • SHA256 110412f2f3e3257b0e6bf514aa866903fd1968e661dbbd54ccf5faae0c12cb8f
  • 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 5 IoCs
    persistence
  • UAC bypass 3 TTPs 14 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 34 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 6 IoCs
    defense_evasion
  • Adds Run key to start application 2 TTPs 64 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 10 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 8 IoCs

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

  • Drops file in System32 directory 39 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 39 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 17 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 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpl3zf8n54.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpl3zf8n54.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmpl3zf8n54.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:4044
      • C:\Users\Admin\AppData\Local\Temp\eifqq.exe
        "C:\Users\Admin\AppData\Local\Temp\eifqq.exe" "-C:\Users\Admin\AppData\Local\Temp\bqyufdteywsdwhre.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:632
      • C:\Users\Admin\AppData\Local\Temp\eifqq.exe
        "C:\Users\Admin\AppData\Local\Temp\eifqq.exe" "-C:\Users\Admin\AppData\Local\Temp\bqyufdteywsdwhre.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:2928
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmpl3zf8n54.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:4360
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4668
  • C:\Users\Admin\AppData\Local\Temp\risqddvieecpkxjyfl.exe
    C:\Users\Admin\AppData\Local\Temp\risqddvieecpkxjyfl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2996
  • C:\Windows\piuujlfusuujgvjajrkw.exe
    piuujlfusuujgvjajrkw.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3476
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\piuujlfusuujgvjajrkw.exe*."
      2⤵
      • Executes dropped EXE
      PID:2008
  • C:\Windows\piuujlfusuujgvjajrkw.exe
    piuujlfusuujgvjajrkw.exe
    1⤵
    • Executes dropped EXE
    PID:3552
  • C:\Windows\risqddvieecpkxjyfl.exe
    risqddvieecpkxjyfl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1152
  • C:\Windows\cufestmaxyxlhviygnf.exe
    cufestmaxyxlhviygnf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1628
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\cufestmaxyxlhviygnf.exe*."
      2⤵
      • Executes dropped EXE
      PID:3848
  • C:\Users\Admin\AppData\Local\Temp\cufestmaxyxlhviygnf.exe
    C:\Users\Admin\AppData\Local\Temp\cufestmaxyxlhviygnf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1780
  • C:\Windows\bqyufdteywsdwhre.exe
    bqyufdteywsdwhre.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4336
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\bqyufdteywsdwhre.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:4684
  • C:\Windows\risqddvieecpkxjyfl.exe
    risqddvieecpkxjyfl.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4488
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\risqddvieecpkxjyfl.exe*."
      2⤵
      • Executes dropped EXE
      PID:4624
  • C:\Users\Admin\AppData\Local\Temp\iyheqpgsnmjvpbmag.exe
    C:\Users\Admin\AppData\Local\Temp\iyheqpgsnmjvpbmag.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:744
  • C:\Windows\cufestmaxyxlhviygnf.exe
    cufestmaxyxlhviygnf.exe
    1⤵
    • Executes dropped EXE
    PID:1788
  • C:\Windows\eylmcfaqpstjhxmeoxref.exe
    eylmcfaqpstjhxmeoxref.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1716
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\eylmcfaqpstjhxmeoxref.exe*."
      2⤵
      • Executes dropped EXE
      PID:792
  • C:\Windows\eylmcfaqpstjhxmeoxref.exe
    eylmcfaqpstjhxmeoxref.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4828
  • C:\Windows\iyheqpgsnmjvpbmag.exe
    iyheqpgsnmjvpbmag.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2100
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\iyheqpgsnmjvpbmag.exe*."
      2⤵
      • Executes dropped EXE
      PID:2968
  • C:\Windows\bqyufdteywsdwhre.exe
    bqyufdteywsdwhre.exe
    1⤵
    • Executes dropped EXE
    PID:2364
  • C:\Users\Admin\AppData\Local\Temp\bqyufdteywsdwhre.exe
    C:\Users\Admin\AppData\Local\Temp\bqyufdteywsdwhre.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4160
  • C:\Users\Admin\AppData\Local\Temp\piuujlfusuujgvjajrkw.exe
    C:\Users\Admin\AppData\Local\Temp\piuujlfusuujgvjajrkw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4476
  • C:\Windows\iyheqpgsnmjvpbmag.exe
    iyheqpgsnmjvpbmag.exe
    1⤵
    • Executes dropped EXE
    PID:404
  • C:\Users\Admin\AppData\Local\Temp\eylmcfaqpstjhxmeoxref.exe
    C:\Users\Admin\AppData\Local\Temp\eylmcfaqpstjhxmeoxref.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4644

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

        duaouzhhnek.exe
        • Path C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
        • Size 320KB
        • SHA256 d936bfd3b4264fe1650dee22119858b9d0cc58598e7e956ebecf72fb82f7c7d3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        eifqq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\eifqq.exe
        • Size 728KB
        • SHA256 12d1588477c7e945dc88e17876231edc787053900338da5f8eae4a925df209eb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ggzgclminwdzdzusixxqxtc.zen
        • Path C:\Users\Admin\AppData\Local\ggzgclminwdzdzusixxqxtc.zen
        • Size 272B
        • SHA256 e69599a9a84d822db919a4858539111d9a8cbb6b35b4154f1daa3555a108901e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        teiahbnukewdszfoppaewdxjqgaszovbkl.was
        • Path C:\Users\Admin\AppData\Local\teiahbnukewdszfoppaewdxjqgaszovbkl.was
        • Size 3KB
        • SHA256 43b8154d86d0557c27605115201f13a03cf8f47e7f5013008d8b746d87c22448
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        risqddvieecpkxjyfl.exe
        • Path C:\Windows\SysWOW64\risqddvieecpkxjyfl.exe
        • Size 812KB
        • SHA256 110412f2f3e3257b0e6bf514aa866903fd1968e661dbbd54ccf5faae0c12cb8f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download