Overview

overview

10

Static

static

3

tmpowu4zwln.exe

windows10-ltsc_2021-x64

10

tmpowu4zwln.exe

windows10-2004-x64

10

tmpowu4zwln.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
    22/05/2026, 14:20

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General

  • Target
    tmpowu4zwln.exe
  • Size 548KB
  • Sample260522-rnpessf121
  • SHA256 3a801906af230c0578e40c4ee18f2fe76ec90085acfc14c1fc95cb0b33b6ac54
  • 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 7 IoCs
    persistence
  • UAC bypass 3 TTPs 16 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 39 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 14 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 53 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 53 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 18 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpowu4zwln.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpowu4zwln.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4716
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\users\admin\appdata\local\temp\tmpowu4zwln.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:2856
      • C:\Users\Admin\AppData\Local\Temp\knzdln.exe
        "C:\Users\Admin\AppData\Local\Temp\knzdln.exe" "-C:\Users\Admin\AppData\Local\Temp\wjftlxpbyjjuybou.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:1940
      • C:\Users\Admin\AppData\Local\Temp\knzdln.exe
        "C:\Users\Admin\AppData\Local\Temp\knzdln.exe" "-C:\Users\Admin\AppData\Local\Temp\wjftlxpbyjjuybou.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:2728
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\users\admin\appdata\local\temp\tmpowu4zwln.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:4876
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2444
  • C:\Windows\xnmdynixxlocjpfoysb.exe
    xnmdynixxlocjpfoysb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3464
  • C:\Windows\drodwjcpnzamrvjqy.exe
    drodwjcpnzamrvjqy.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:632
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\windows\drodwjcpnzamrvjqy.exe*."
      2⤵
      • Executes dropped EXE
      PID:3592
  • C:\Users\Admin\AppData\Local\Temp\xnmdynixxlocjpfoysb.exe
    C:\Users\Admin\AppData\Local\Temp\xnmdynixxlocjpfoysb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1976
  • C:\Windows\kbbtpfbrshlaipgqbwgx.exe
    kbbtpfbrshlaipgqbwgx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1540
  • C:\Users\Admin\AppData\Local\Temp\wjftlxpbyjjuybou.exe
    C:\Users\Admin\AppData\Local\Temp\wjftlxpbyjjuybou.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1376
  • C:\Windows\wjftlxpbyjjuybou.exe
    wjftlxpbyjjuybou.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2160
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\windows\wjftlxpbyjjuybou.exe*."
      2⤵
      • Executes dropped EXE
      PID:4832
  • C:\Windows\zrslizwnpfkajrjugcnfg.exe
    zrslizwnpfkajrjugcnfg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2344
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\windows\zrslizwnpfkajrjugcnfg.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:3592
  • C:\Windows\mbzpjxrfertgmrgoxq.exe
    mbzpjxrfertgmrgoxq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4484
  • C:\Windows\drodwjcpnzamrvjqy.exe
    drodwjcpnzamrvjqy.exe
    1⤵
    • Executes dropped EXE
    PID:4452
  • C:\Users\Admin\AppData\Local\Temp\kbbtpfbrshlaipgqbwgx.exe
    C:\Users\Admin\AppData\Local\Temp\kbbtpfbrshlaipgqbwgx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:700
  • C:\Windows\zrslizwnpfkajrjugcnfg.exe
    zrslizwnpfkajrjugcnfg.exe
    1⤵
    • Executes dropped EXE
    PID:2564
  • C:\Windows\mbzpjxrfertgmrgoxq.exe
    mbzpjxrfertgmrgoxq.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4800
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\windows\mbzpjxrfertgmrgoxq.exe*."
      2⤵
      • Executes dropped EXE
      PID:2024
  • C:\Users\Admin\AppData\Local\Temp\drodwjcpnzamrvjqy.exe
    C:\Users\Admin\AppData\Local\Temp\drodwjcpnzamrvjqy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4704
  • C:\Windows\wjftlxpbyjjuybou.exe
    wjftlxpbyjjuybou.exe
    1⤵
    • Executes dropped EXE
    PID:5108
  • C:\Windows\xnmdynixxlocjpfoysb.exe
    xnmdynixxlocjpfoysb.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3708
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\windows\xnmdynixxlocjpfoysb.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:4484
  • C:\Users\Admin\AppData\Local\Temp\zrslizwnpfkajrjugcnfg.exe
    C:\Users\Admin\AppData\Local\Temp\zrslizwnpfkajrjugcnfg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2192
  • C:\Windows\kbbtpfbrshlaipgqbwgx.exe
    kbbtpfbrshlaipgqbwgx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4108
    • C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
      "C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe" "c:\windows\kbbtpfbrshlaipgqbwgx.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:4264
  • C:\Users\Admin\AppData\Local\Temp\mbzpjxrfertgmrgoxq.exe
    C:\Users\Admin\AppData\Local\Temp\mbzpjxrfertgmrgoxq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5004

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

        agfdlmoakqp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\agfdlmoakqp.exe
        • Size 320KB
        • SHA256 c3465c64a6dba68e8d2b3120441cead83137b19d13504a805941e524444f8d02
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        knzdln.exe
        • Path C:\Users\Admin\AppData\Local\Temp\knzdln.exe
        • Size 708KB
        • SHA256 7b9de60092e07d08e5a9ae83d06abc79a0a43b18f423a5702f2d0e3686feb378
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bxczavwrxrauhtpeuujfk.ide
        • Path C:\Users\Admin\AppData\Local\bxczavwrxrauhtpeuujfk.ide
        • Size 280B
        • SHA256 37877ed83aad3e1ebbc4044ade90347de16ac5c1b9d357d2e096d404c2a7451c
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wdtbntflchbgebiijuubrzlrdjafzecz.ghs
        • Path C:\Users\Admin\AppData\Local\wdtbntflchbgebiijuubrzlrdjafzecz.ghs
        • Size 4KB
        • SHA256 40623b9b1cb22b797b8c0d5fd4eb97ad4e4b71be4da0cddeadc5abec2a548774
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mbzpjxrfertgmrgoxq.exe
        • Path C:\Windows\SysWOW64\mbzpjxrfertgmrgoxq.exe
        • Size 548KB
        • SHA256 3a801906af230c0578e40c4ee18f2fe76ec90085acfc14c1fc95cb0b33b6ac54
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download