Overview

overview

10

Static

static

3

tmpquyrzupa.exe

windows10-ltsc_2021-x64

10

tmpquyrzupa.exe

windows10-2004-x64

10

tmpquyrzupa.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, 03:11

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General

  • Target
    tmpquyrzupa.exe
  • Size 488KB
  • Sample260602-dpx7facw2y
  • SHA256 20e4241d56de82ebe1f1eec55cdf29ecfe8717610008b6c81e1ada4f7e361cc1
  • 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 7 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpquyrzupa.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpquyrzupa.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2484
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\users\admin\appdata\local\temp\tmpquyrzupa.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:2132
      • C:\Users\Admin\AppData\Local\Temp\vjqubij.exe
        "C:\Users\Admin\AppData\Local\Temp\vjqubij.exe" "-C:\Users\Admin\AppData\Local\Temp\urhukakbzjvkaoye.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:1036
      • C:\Users\Admin\AppData\Local\Temp\vjqubij.exe
        "C:\Users\Admin\AppData\Local\Temp\vjqubij.exe" "-C:\Users\Admin\AppData\Local\Temp\urhukakbzjvkaoye.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:3180
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\users\admin\appdata\local\temp\tmpquyrzupa.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:2288
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3440
  • C:\Windows\bzqevmxpozmctitae.exe
    bzqevmxpozmctitae.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:796
  • C:\Windows\xzumhcrnqfwqletemtlni.exe
    xzumhcrnqfwqletemtlni.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3016
  • C:\Users\Admin\AppData\Local\Temp\ijduoiwrthxqkcqahnef.exe
    C:\Users\Admin\AppData\Local\Temp\ijduoiwrthxqkcqahnef.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2076
  • C:\Windows\vvoexqdxylaslcpyejz.exe
    vvoexqdxylaslcpyejz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2360
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\vvoexqdxylaslcpyejz.exe*."
      2⤵
      • Executes dropped EXE
      PID:5036
  • C:\Users\Admin\AppData\Local\Temp\urhukakbzjvkaoye.exe
    C:\Users\Admin\AppData\Local\Temp\urhukakbzjvkaoye.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5088
  • C:\Windows\bzqevmxpozmctitae.exe
    bzqevmxpozmctitae.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\bzqevmxpozmctitae.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:3452
  • C:\Windows\ijduoiwrthxqkcqahnef.exe
    ijduoiwrthxqkcqahnef.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2272
  • C:\Windows\kjbqiamffrfwoeqydh.exe
    kjbqiamffrfwoeqydh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1488
  • C:\Windows\vvoexqdxylaslcpyejz.exe
    vvoexqdxylaslcpyejz.exe
    1⤵
    • Executes dropped EXE
    PID:4904
  • C:\Windows\urhukakbzjvkaoye.exe
    urhukakbzjvkaoye.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2768
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\urhukakbzjvkaoye.exe*."
      2⤵
      • Executes dropped EXE
      PID:692
  • C:\Users\Admin\AppData\Local\Temp\kjbqiamffrfwoeqydh.exe
    C:\Users\Admin\AppData\Local\Temp\kjbqiamffrfwoeqydh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2136
  • C:\Windows\xzumhcrnqfwqletemtlni.exe
    xzumhcrnqfwqletemtlni.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3892
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\xzumhcrnqfwqletemtlni.exe*."
      2⤵
      • Executes dropped EXE
      PID:4412
  • C:\Windows\ijduoiwrthxqkcqahnef.exe
    ijduoiwrthxqkcqahnef.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4884
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\ijduoiwrthxqkcqahnef.exe*."
      2⤵
      • Executes dropped EXE
      PID:4920
  • C:\Users\Admin\AppData\Local\Temp\vvoexqdxylaslcpyejz.exe
    C:\Users\Admin\AppData\Local\Temp\vvoexqdxylaslcpyejz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3420
  • C:\Windows\kjbqiamffrfwoeqydh.exe
    kjbqiamffrfwoeqydh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2388
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\kjbqiamffrfwoeqydh.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:3416
  • C:\Windows\urhukakbzjvkaoye.exe
    urhukakbzjvkaoye.exe
    1⤵
    • Executes dropped EXE
    PID:4636
  • C:\Users\Admin\AppData\Local\Temp\bzqevmxpozmctitae.exe
    C:\Users\Admin\AppData\Local\Temp\bzqevmxpozmctitae.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1132
  • C:\Users\Admin\AppData\Local\Temp\xzumhcrnqfwqletemtlni.exe
    C:\Users\Admin\AppData\Local\Temp\xzumhcrnqfwqletemtlni.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1444

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

        Loading Replay Monitor...

        Downloads

        ozdeimkpbzzcgigarhitxycgej.ttw
        • Path C:\Program Files (x86)\ozdeimkpbzzcgigarhitxycgej.ttw
        • Size 280B
        • SHA256 103ea0641c9c1e2cb70229b6807f04cfb3a9a5a37f8d518b5f5ce642cd0203e9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ozdeimkpbzzcgigarhitxycgej.ttw
        • Path C:\Program Files (x86)\ozdeimkpbzzcgigarhitxycgej.ttw
        • Size 280B
        • SHA256 946fd81fa9faa4fb3d47d996346ae8d397738cff40654944dadbaa10aaeda1d6
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ozdeimkpbzzcgigarhitxycgej.ttw
        • Path C:\Program Files (x86)\ozdeimkpbzzcgigarhitxycgej.ttw
        • Size 280B
        • SHA256 24142e4e0704bce04751c8bb0bbb62272178f93657d9743ed7587ba3db168271
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ozdeimkpbzzcgigarhitxycgej.ttw
        • Path C:\Program Files (x86)\ozdeimkpbzzcgigarhitxycgej.ttw
        • Size 280B
        • SHA256 ef258280c48d0d99d2e339b742da92496becbb0a5a840850c76652ed3565f4c4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        mwhqvwurwgr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
        • Size 320KB
        • SHA256 49910428fc3ce52165c7010010dd6659e64d110292cad375a2dca77572ee0c47
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vjqubij.exe
        • Path C:\Users\Admin\AppData\Local\Temp\vjqubij.exe
        • Size 704KB
        • SHA256 668c7e8a8d6557a4d7b36da00972408935077f54e458a96f7a72daab1a85176e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ozdeimkpbzzcgigarhitxycgej.ttw
        • Path C:\Users\Admin\AppData\Local\ozdeimkpbzzcgigarhitxycgej.ttw
        • Size 280B
        • SHA256 b443f02344fceb7950a9ffab4c19339bbd2490282ebd6072a6d1dfcb295aed3e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        plambqzpmvgujwfkmnzvkwlajzwfqetgpuwxj.ugv
        • Path C:\Users\Admin\AppData\Local\plambqzpmvgujwfkmnzvkwlajzwfqetgpuwxj.ugv
        • Size 4KB
        • SHA256 d5ab098effa33a230c8cd6549be17eadd9ec525cf1859ddba3f32183e7151fde
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        kjbqiamffrfwoeqydh.exe
        • Path C:\Windows\SysWOW64\kjbqiamffrfwoeqydh.exe
        • Size 488KB
        • SHA256 20e4241d56de82ebe1f1eec55cdf29ecfe8717610008b6c81e1ada4f7e361cc1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ulvcmwaldh.bat
        • Path C:\ulvcmwaldh.bat
        • Size 520KB
        • SHA256 7189e494394cfd62092b01bb30a0a8610559efdfbfd79d2584630d9ca3582183
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download