Overview

overview

10

Static

static

3

tmpq3wfd43w.exe

windows10-ltsc_2021-x64

10

tmpq3wfd43w.exe

windows10-2004-x64

10

tmpq3wfd43w.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    22/05/2026, 14:45

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General

  • Target
    tmpq3wfd43w.exe
  • Size 1016KB
  • Sample260522-r4845set8r
  • SHA256 4ead061ce77e00a73922495a1c9298df7913b866deb7d80ddc8d5f35b6a55763
  • 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 32 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 7 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\tmpq3wfd43w.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpq3wfd43w.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3992
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\users\admin\appdata\local\temp\tmpq3wfd43w.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:3328
      • C:\Users\Admin\AppData\Local\Temp\xdmudcm.exe
        "C:\Users\Admin\AppData\Local\Temp\xdmudcm.exe" "-C:\Users\Admin\AppData\Local\Temp\wldumunhppfcvkgm.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:1068
      • C:\Users\Admin\AppData\Local\Temp\xdmudcm.exe
        "C:\Users\Admin\AppData\Local\Temp\xdmudcm.exe" "-C:\Users\Admin\AppData\Local\Temp\wldumunhppfcvkgm.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:2712
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\users\admin\appdata\local\temp\tmpq3wfd43w.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:3264
  • C:\Windows\xpkezkgdorkkgyxgphc.exe
    xpkezkgdorkkgyxgphc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3980
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1460
  • C:\Windows\mdxqkuplvxpojaygof.exe
    mdxqkuplvxpojaygof.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3028
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\mdxqkuplvxpojaygof.exe*."
      2⤵
      • Executes dropped EXE
      PID:32
  • C:\Windows\dtmexgavefwuoebip.exe
    dtmexgavefwuoebip.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4992
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\dtmexgavefwuoebip.exe*."
      2⤵
      • Executes dropped EXE
      PID:820
  • C:\Users\Admin\AppData\Local\Temp\kdzuqczxjnhifyyislhc.exe
    C:\Users\Admin\AppData\Local\Temp\kdzuqczxjnhifyyislhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2732
  • C:\Users\Admin\AppData\Local\Temp\mdxqkuplvxpojaygof.exe
    C:\Users\Admin\AppData\Local\Temp\mdxqkuplvxpojaygof.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1892
  • C:\Windows\mdxqkuplvxpojaygof.exe
    mdxqkuplvxpojaygof.exe
    1⤵
    • Executes dropped EXE
    PID:5008
  • C:\Windows\ztqmjwutglgigabmxrokh.exe
    ztqmjwutglgigabmxrokh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3652
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\ztqmjwutglgigabmxrokh.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:2556
  • C:\Windows\kdzuqczxjnhifyyislhc.exe
    kdzuqczxjnhifyyislhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3780
  • C:\Windows\kdzuqczxjnhifyyislhc.exe
    kdzuqczxjnhifyyislhc.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\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\kdzuqczxjnhifyyislhc.exe*."
      2⤵
      • Executes dropped EXE
      PID:2028
  • C:\Windows\xpkezkgdorkkgyxgphc.exe
    xpkezkgdorkkgyxgphc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1824
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\xpkezkgdorkkgyxgphc.exe*."
      2⤵
      • Executes dropped EXE
      PID:4920
  • C:\Users\Admin\AppData\Local\Temp\wldumunhppfcvkgm.exe
    C:\Users\Admin\AppData\Local\Temp\wldumunhppfcvkgm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3628
  • C:\Windows\wldumunhppfcvkgm.exe
    wldumunhppfcvkgm.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2632
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\wldumunhppfcvkgm.exe*."
      2⤵
      • Executes dropped EXE
      PID:1912
  • C:\Windows\wldumunhppfcvkgm.exe
    wldumunhppfcvkgm.exe
    1⤵
    • Executes dropped EXE
    PID:1292
  • C:\Windows\dtmexgavefwuoebip.exe
    dtmexgavefwuoebip.exe
    1⤵
    • Executes dropped EXE
    PID:4160
  • C:\Windows\ztqmjwutglgigabmxrokh.exe
    ztqmjwutglgigabmxrokh.exe
    1⤵
    • Executes dropped EXE
    PID:4840
  • C:\Users\Admin\AppData\Local\Temp\xpkezkgdorkkgyxgphc.exe
    C:\Users\Admin\AppData\Local\Temp\xpkezkgdorkkgyxgphc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3004
  • C:\Users\Admin\AppData\Local\Temp\ztqmjwutglgigabmxrokh.exe
    C:\Users\Admin\AppData\Local\Temp\ztqmjwutglgigabmxrokh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2384
  • C:\Users\Admin\AppData\Local\Temp\dtmexgavefwuoebip.exe
    C:\Users\Admin\AppData\Local\Temp\dtmexgavefwuoebip.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1292

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

        mhskyizawrc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
        • Size 320KB
        • SHA256 fe3150cb4d1970a784d35dcc0000c954fbb0ad224191357a3ea3521d15430150
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        xdmudcm.exe
        • Path C:\Users\Admin\AppData\Local\Temp\xdmudcm.exe
        • Size 728KB
        • SHA256 b801defe7af09f672cc5031670fe95ce59ddcbc3d7007b2099cef8ccb4ab36c0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qtzekgnvrfjubeoicflqwszhdr.gnq
        • Path C:\Users\Admin\AppData\Local\qtzekgnvrfjubeoicflqwszhdr.gnq
        • Size 280B
        • SHA256 787c2555ab5f180e8770df1dcde70274b26a0d963d71eb57db0564b72d4fdbb5
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rfwmdkcvcbqmesnsxlcsjqibihwskytydriyp.oho
        • Path C:\Users\Admin\AppData\Local\rfwmdkcvcbqmesnsxlcsjqibihwskytydriyp.oho
        • Size 4KB
        • SHA256 079d3f9205378916d229cbab75701042412bc249475a76cab48260c0859f8ee0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mdxqkuplvxpojaygof.exe
        • Path C:\Windows\SysWOW64\mdxqkuplvxpojaygof.exe
        • Size 1016KB
        • SHA256 4ead061ce77e00a73922495a1c9298df7913b866deb7d80ddc8d5f35b6a55763
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download