Overview

overview

10

Static

static

3

tmpu53sm5nu.exe

windows10-ltsc_2021-x64

10

tmpu53sm5nu.exe

windows10-2004-x64

10

tmpu53sm5nu.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    02/06/2026, 03:56

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General

  • Target
    tmpu53sm5nu.exe
  • Size 640KB
  • Sample260602-ehg3baex5l
  • SHA256 08565ab76bff7b276fa60584ca2adc3afafbce2ac1a47bd5cb014f744370e598
  • 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 37 IoCs
    persistence
  • Disables RegEdit via registry modification 9 IoCs
    defense_evasion
  • 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 4 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\tmpu53sm5nu.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpu53sm5nu.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1812
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\users\admin\appdata\local\temp\tmpu53sm5nu.exe*"
      2⤵
      • 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 Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2856
      • C:\Users\Admin\AppData\Local\Temp\zalqq.exe
        "C:\Users\Admin\AppData\Local\Temp\zalqq.exe" "-c:\users\admin\appdata\local\temp\tmpu53sm5nu.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 Location Discovery: System Language Discovery
        • System policy modification
        PID:2812
      • C:\Users\Admin\AppData\Local\Temp\zalqq.exe
        "C:\Users\Admin\AppData\Local\Temp\zalqq.exe" "-c:\users\admin\appdata\local\temp\tmpu53sm5nu.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:3780
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\users\admin\appdata\local\temp\tmpu53sm5nu.exe"
      2⤵
      • 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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:464
  • C:\Windows\mayqdasldmnzuzlgfg.exe
    mayqdasldmnzuzlgfg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3724
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\mayqdasldmnzuzlgfg.exe*."
      2⤵
      • Executes dropped EXE
      PID:840
  • C:\Windows\kaaujicxrcftqxlijmcc.exe
    kaaujicxrcftqxlijmcc.exe
    1⤵
    • Executes dropped EXE
    PID:3552
  • C:\Windows\kaaujicxrcftqxlijmcc.exe
    kaaujicxrcftqxlijmcc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4484
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\kaaujicxrcftqxlijmcc.exe*."
      2⤵
      • Executes dropped EXE
      PID:2196
  • C:\Users\Admin\AppData\Local\Temp\zqrmccxtoaetrzomosjkf.exe
    C:\Users\Admin\AppData\Local\Temp\zqrmccxtoaetrzomosjkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2176
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4548
  • C:\Windows\dqneqmdvmuufzdoig.exe
    dqneqmdvmuufzdoig.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4316
  • C:\Users\Admin\AppData\Local\Temp\wieufaqhxedngjtm.exe
    C:\Users\Admin\AppData\Local\Temp\wieufaqhxedngjtm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4040
  • C:\Windows\xmlesqjdwgivrxkggix.exe
    xmlesqjdwgivrxkggix.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3364
  • C:\Windows\mayqdasldmnzuzlgfg.exe
    mayqdasldmnzuzlgfg.exe
    1⤵
    • Executes dropped EXE
    PID:4680
  • C:\Users\Admin\AppData\Local\Temp\mayqdasldmnzuzlgfg.exe
    C:\Users\Admin\AppData\Local\Temp\mayqdasldmnzuzlgfg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4392
  • C:\Windows\zqrmccxtoaetrzomosjkf.exe
    zqrmccxtoaetrzomosjkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2976
  • C:\Windows\wieufaqhxedngjtm.exe
    wieufaqhxedngjtm.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1524
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\wieufaqhxedngjtm.exe*."
      2⤵
      • 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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:2200
  • C:\Users\Admin\AppData\Local\Temp\kaaujicxrcftqxlijmcc.exe
    C:\Users\Admin\AppData\Local\Temp\kaaujicxrcftqxlijmcc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1536
  • C:\Windows\zqrmccxtoaetrzomosjkf.exe
    zqrmccxtoaetrzomosjkf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1416
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\zqrmccxtoaetrzomosjkf.exe*."
      2⤵
      • Executes dropped EXE
      PID:4932
  • C:\Windows\dqneqmdvmuufzdoig.exe
    dqneqmdvmuufzdoig.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:220
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\dqneqmdvmuufzdoig.exe*."
      2⤵
      • Executes dropped EXE
      PID:2968
  • C:\Windows\wieufaqhxedngjtm.exe
    wieufaqhxedngjtm.exe
    1⤵
    • Executes dropped EXE
    PID:400
  • C:\Users\Admin\AppData\Local\Temp\dqneqmdvmuufzdoig.exe
    C:\Users\Admin\AppData\Local\Temp\dqneqmdvmuufzdoig.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4900
  • C:\Windows\xmlesqjdwgivrxkggix.exe
    xmlesqjdwgivrxkggix.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3840
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\xmlesqjdwgivrxkggix.exe*."
      2⤵
      • 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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3880
  • C:\Users\Admin\AppData\Local\Temp\xmlesqjdwgivrxkggix.exe
    C:\Users\Admin\AppData\Local\Temp\xmlesqjdwgivrxkggix.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3272

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

        System Information Discovery

        2
        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

        qqaedmqvzuhfmdbitggqutcglp.xvc
        • Path C:\Program Files (x86)\qqaedmqvzuhfmdbitggqutcglp.xvc
        • Size 280B
        • SHA256 9e002635c26562961bb0c083788d90e5e3444b4d2b52af7d89d460f4283d46eb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qqaedmqvzuhfmdbitggqutcglp.xvc
        • Path C:\Program Files (x86)\qqaedmqvzuhfmdbitggqutcglp.xvc
        • Size 280B
        • SHA256 9bc4126029ce1f0339e5caf25fadc4208aaafbdd50da29a1a4032b4987a9dce4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qqaedmqvzuhfmdbitggqutcglp.xvc
        • Path C:\Program Files (x86)\qqaedmqvzuhfmdbitggqutcglp.xvc
        • Size 280B
        • SHA256 b2f6d91b4584dbc7b674ee9cb947880f446fd0752d35f9293948192dd4279433
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qqaedmqvzuhfmdbitggqutcglp.xvc
        • Path C:\Program Files (x86)\qqaedmqvzuhfmdbitggqutcglp.xvc
        • Size 280B
        • SHA256 c8439ce190aee5df412d0570291ddcf05e1abf5c2506037ba4aa86574fcbe7b4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        lfkywbphvpu.exe
        • Path C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
        • Size 320KB
        • SHA256 2818a771f371ca8b4a9982a0840f9e8d5c4f50dece6d3b083b5b1effe9023056
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zalqq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\zalqq.exe
        • Size 740KB
        • SHA256 bb0644db330b80b92bccbf45795c40d6ac98a601209e782d41d2502ca57d642c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qqaedmqvzuhfmdbitggqutcglp.xvc
        • Path C:\Users\Admin\AppData\Local\qqaedmqvzuhfmdbitggqutcglp.xvc
        • Size 280B
        • SHA256 1e2d2f8fd113c26af003e7b9e6a1a21601a714d8ba56bbd2a09f039d706a76b3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rcxmwqfvkqoxprasomxshrlaqfljskmvnjhsn.mgv
        • Path C:\Users\Admin\AppData\Local\rcxmwqfvkqoxprasomxshrlaqfljskmvnjhsn.mgv
        • Size 4KB
        • SHA256 a9672ec332a88c8fa3d33e9c87dea08cc40780f19105560ce262b5ddd56c628e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mayqdasldmnzuzlgfg.exe
        • Path C:\Windows\SysWOW64\mayqdasldmnzuzlgfg.exe
        • Size 640KB
        • SHA256 08565ab76bff7b276fa60584ca2adc3afafbce2ac1a47bd5cb014f744370e598
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download