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
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-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 6 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 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 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 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:3972
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.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:4552
      • C:\Users\Admin\AppData\Local\Temp\aenvalm.exe
        "C:\Users\Admin\AppData\Local\Temp\aenvalm.exe" "-C:\Users\Admin\AppData\Local\Temp\zmevjdneqkvkaoye.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:4720
      • C:\Users\Admin\AppData\Local\Temp\aenvalm.exe
        "C:\Users\Admin\AppData\Local\Temp\aenvalm.exe" "-C:\Users\Admin\AppData\Local\Temp\zmevjdneqkvkaoye.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:1536
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.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:3940
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3184
  • C:\Windows\gunfupasfamctitae.exe
    gunfupasfamctitae.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1404
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\gunfupasfamctitae.exe*."
      2⤵
      • Executes dropped EXE
      PID:3228
  • C:\Windows\zmevjdneqkvkaoye.exe
    zmevjdneqkvkaoye.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4256
  • C:\Windows\peyrhdpiwsfwoeqydh.exe
    peyrhdpiwsfwoeqydh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2672
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\peyrhdpiwsfwoeqydh.exe*."
      2⤵
      • Executes dropped EXE
      PID:4012
  • C:\Users\Admin\AppData\Local\Temp\aqlfwtgapmaslcpyeje.exe
    C:\Users\Admin\AppData\Local\Temp\aqlfwtgapmaslcpyeje.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2776
  • C:\Windows\gunfupasfamctitae.exe
    gunfupasfamctitae.exe
    1⤵
    • Executes dropped EXE
    PID:4144
  • C:\Users\Admin\AppData\Local\Temp\peyrhdpiwsfwoeqydh.exe
    C:\Users\Admin\AppData\Local\Temp\peyrhdpiwsfwoeqydh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:628
  • C:\Windows\curngfuqhgwqletemtqif.exe
    curngfuqhgwqletemtqif.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\curngfuqhgwqletemtqif.exe*."
      2⤵
      • Executes dropped EXE
      PID:3776
  • C:\Windows\aqlfwtgapmaslcpyeje.exe
    aqlfwtgapmaslcpyeje.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4656
  • C:\Windows\zmevjdneqkvkaoye.exe
    zmevjdneqkvkaoye.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:816
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\zmevjdneqkvkaoye.exe*."
      2⤵
      • Executes dropped EXE
      PID:3940
  • C:\Users\Admin\AppData\Local\Temp\curngfuqhgwqletemtqif.exe
    C:\Users\Admin\AppData\Local\Temp\curngfuqhgwqletemtqif.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4820
  • C:\Windows\aqlfwtgapmaslcpyeje.exe
    aqlfwtgapmaslcpyeje.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\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\aqlfwtgapmaslcpyeje.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:4316
  • C:\Users\Admin\AppData\Local\Temp\neavnlzukixqkcqahnja.exe
    C:\Users\Admin\AppData\Local\Temp\neavnlzukixqkcqahnja.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3088
  • C:\Users\Admin\AppData\Local\Temp\zmevjdneqkvkaoye.exe
    C:\Users\Admin\AppData\Local\Temp\zmevjdneqkvkaoye.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2356
  • C:\Windows\neavnlzukixqkcqahnja.exe
    neavnlzukixqkcqahnja.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4928
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\neavnlzukixqkcqahnja.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:1020
  • C:\Windows\neavnlzukixqkcqahnja.exe
    neavnlzukixqkcqahnja.exe
    1⤵
    • Executes dropped EXE
    PID:1032
  • C:\Users\Admin\AppData\Local\Temp\gunfupasfamctitae.exe
    C:\Users\Admin\AppData\Local\Temp\gunfupasfamctitae.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4476
  • C:\Windows\peyrhdpiwsfwoeqydh.exe
    peyrhdpiwsfwoeqydh.exe
    1⤵
    • Executes dropped EXE
    PID:412
  • C:\Windows\curngfuqhgwqletemtqif.exe
    curngfuqhgwqletemtqif.exe
    1⤵
    • Executes dropped EXE
    PID:4064

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

        aenvalm.exe
        • Path C:\Users\Admin\AppData\Local\Temp\aenvalm.exe
        • Size 720KB
        • SHA256 b3d472fb1cbcd3e0642dca035a2dd97d2bf46542e732fe46e71417d8705ee0d7
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mwhqvwurwgr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
        • Size 320KB
        • SHA256 535f97536cd22901c62d9ade68be2c4c5411ab24b9688a05675113f6d94bfcf1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mmrvwdaedkiknoleujootxyfc.fmk
        • Path C:\Users\Admin\AppData\Local\mmrvwdaedkiknoleujootxyfc.fmk
        • Size 280B
        • SHA256 6b49ac825513a0f4e3fa668f211591b45d7176910f37a5b0ee5aab3969ba9603
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rcshtltisktgugosttjukzldlakclymygkll.mcr
        • Path C:\Users\Admin\AppData\Local\rcshtltisktgugosttjukzldlakclymygkll.mcr
        • Size 4KB
        • SHA256 8c402b4be1a97289ac66def5601eac44d0bb096ed0b36768d9471b7d1402a749
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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