Overview

overview

10

Static

static

3

tmpu55txez0.exe

windows10-ltsc_2021-x64

10

tmpu55txez0.exe

windows10-2004-x64

10

tmpu55txez0.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    02/06/2026, 03:53

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General

  • Target
    tmpu55txez0.exe
  • Size 560KB
  • Sample260602-efngbaex2m
  • SHA256 717c2978702de3a7f235ab5c1de7bcb7a2519ec1bdf366a9e13c46f12485fd5d
  • 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 6 IoCs
    persistence
  • UAC bypass 3 TTPs 15 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 35 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 12 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 6 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 46 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 46 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 20 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpu55txez0.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpu55txez0.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3620
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\users\admin\appdata\local\temp\tmpu55txez0.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:1812
      • C:\Users\Admin\AppData\Local\Temp\veitp.exe
        "C:\Users\Admin\AppData\Local\Temp\veitp.exe" "-C:\Users\Admin\AppData\Local\Temp\smbxewkjrjzisesp.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:2488
      • C:\Users\Admin\AppData\Local\Temp\veitp.exe
        "C:\Users\Admin\AppData\Local\Temp\veitp.exe" "-C:\Users\Admin\AppData\Local\Temp\smbxewkjrjzisesp.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:4720
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\users\admin\appdata\local\temp\tmpu55txez0.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:3444
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3896
  • C:\Windows\vuopbyrvifaodunpiwjic.exe
    vuopbyrvifaodunpiwjic.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2088
  • C:\Windows\gexxiewzlhbocskldqca.exe
    gexxiewzlhbocskldqca.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4316
  • C:\Windows\gexxiewzlhbocskldqca.exe
    gexxiewzlhbocskldqca.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3560
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\gexxiewzlhbocskldqca.exe*."
      2⤵
      • Executes dropped EXE
      PID:2100
  • C:\Users\Admin\AppData\Local\Temp\ievtcwmnxrjugukjzk.exe
    C:\Users\Admin\AppData\Local\Temp\ievtcwmnxrjugukjzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:472
  • C:\Windows\zukhpixxgzqalynla.exe
    zukhpixxgzqalynla.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2604
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\zukhpixxgzqalynla.exe*."
      2⤵
      • Executes dropped EXE
      PID:804
  • C:\Users\Admin\AppData\Local\Temp\vuopbyrvifaodunpiwjic.exe
    C:\Users\Admin\AppData\Local\Temp\vuopbyrvifaodunpiwjic.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1800
  • C:\Windows\ievtcwmnxrjugukjzk.exe
    ievtcwmnxrjugukjzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2608
  • C:\Windows\smbxewkjrjzisesp.exe
    smbxewkjrjzisesp.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3276
  • C:\Windows\zukhpixxgzqalynla.exe
    zukhpixxgzqalynla.exe
    1⤵
    • Executes dropped EXE
    PID:2292
  • C:\Users\Admin\AppData\Local\Temp\tqihrmdfqleqdsjjamx.exe
    C:\Users\Admin\AppData\Local\Temp\tqihrmdfqleqdsjjamx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1256
  • C:\Users\Admin\AppData\Local\Temp\smbxewkjrjzisesp.exe
    C:\Users\Admin\AppData\Local\Temp\smbxewkjrjzisesp.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1344
  • C:\Windows\vuopbyrvifaodunpiwjic.exe
    vuopbyrvifaodunpiwjic.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3840
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\vuopbyrvifaodunpiwjic.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:4656
  • C:\Users\Admin\AppData\Local\Temp\gexxiewzlhbocskldqca.exe
    C:\Users\Admin\AppData\Local\Temp\gexxiewzlhbocskldqca.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2668
  • C:\Windows\smbxewkjrjzisesp.exe
    smbxewkjrjzisesp.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2392
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\smbxewkjrjzisesp.exe*."
      2⤵
      • Executes dropped EXE
      PID:4436
  • C:\Users\Admin\AppData\Local\Temp\zukhpixxgzqalynla.exe
    C:\Users\Admin\AppData\Local\Temp\zukhpixxgzqalynla.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2320
  • C:\Windows\tqihrmdfqleqdsjjamx.exe
    tqihrmdfqleqdsjjamx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3728
  • C:\Windows\tqihrmdfqleqdsjjamx.exe
    tqihrmdfqleqdsjjamx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4852
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\tqihrmdfqleqdsjjamx.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:1040
  • C:\Windows\ievtcwmnxrjugukjzk.exe
    ievtcwmnxrjugukjzk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\ievtcwmnxrjugukjzk.exe*."
      2⤵
      • Executes dropped EXE
      PID:2672

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

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        Downloads

        aghpimmxrvxsommvvqkqrzsw.hbf
        • Path C:\Program Files (x86)\aghpimmxrvxsommvvqkqrzsw.hbf
        • Size 280B
        • SHA256 1cbe5361983d86e07d2a62db92287fdf10695c720aad1913e0f69e2974525e99
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        aghpimmxrvxsommvvqkqrzsw.hbf
        • Path C:\Program Files (x86)\aghpimmxrvxsommvvqkqrzsw.hbf
        • Size 280B
        • SHA256 b4ed69e726957e327d068f63108a3cc1a07bccc07e9b0dbef5ace832338aa595
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        aghpimmxrvxsommvvqkqrzsw.hbf
        • Path C:\Program Files (x86)\aghpimmxrvxsommvvqkqrzsw.hbf
        • Size 280B
        • SHA256 847fdc4f8c47dab06648cd9ed7f2bf53af59e616c9a8e80fb0c6a01b719e9e44
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        quzgphquaej.exe
        • Path C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
        • Size 320KB
        • SHA256 cde8b7cc7a1dcfb8c2946fa76ba388bb818fede353ac27213f680b3d55ac0cf5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        veitp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\veitp.exe
        • Size 724KB
        • SHA256 d80702f17190344bb98ea1ebe35c111f7cd15249faadafc004b915cda78d1f5a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        aghpimmxrvxsommvvqkqrzsw.hbf
        • Path C:\Users\Admin\AppData\Local\aghpimmxrvxsommvvqkqrzsw.hbf
        • Size 280B
        • SHA256 abb80284cf06489ebbc7d7e31a783c53d22ac84fe59559f7331a287047cdbcc1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        jamfjyjfkzmszitnyejamfjyjfkzmszitny.jam
        • Path C:\Users\Admin\AppData\Local\jamfjyjfkzmszitnyejamfjyjfkzmszitny.jam
        • Size 4KB
        • SHA256 4db6653785b576b859bfc1019bfee32b2b5d406e7893aa0eda9962971439a7c9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ievtcwmnxrjugukjzk.exe
        • Path C:\Windows\SysWOW64\ievtcwmnxrjugukjzk.exe
        • Size 560KB
        • SHA256 717c2978702de3a7f235ab5c1de7bcb7a2519ec1bdf366a9e13c46f12485fd5d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        sgpfgsatvh.bat
        • Path C:\sgpfgsatvh.bat
        • Size 648KB
        • SHA256 26d293e58730c9e4651ca9907157c99ecc58833f5d8f9f4c720e8d6eb39128da
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download