Overview

overview

10

Static

static

3

tmp1l50foxo.exe

windows10-ltsc_2021-x64

10

tmp1l50foxo.exe

windows10-2004-x64

10

tmp1l50foxo.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • 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, 03:39

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General

  • Target
    tmp1l50foxo.exe
  • Size 516KB
  • Sample260602-d7pm1sc17x
  • SHA256 f3cb92699801b3fd4ca75d9e7a09d1b40b0a4591399753c4222c0b6385d8c897
  • 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 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp1l50foxo.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp1l50foxo.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3396
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\users\admin\appdata\local\temp\tmp1l50foxo.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:4012
      • C:\Users\Admin\AppData\Local\Temp\bhjqp.exe
        "C:\Users\Admin\AppData\Local\Temp\bhjqp.exe" "-C:\Users\Admin\AppData\Local\Temp\ypcueusbrckxlvwv.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:1720
      • C:\Users\Admin\AppData\Local\Temp\bhjqp.exe
        "C:\Users\Admin\AppData\Local\Temp\bhjqp.exe" "-C:\Users\Admin\AppData\Local\Temp\ypcueusbrckxlvwv.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:4192
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\users\admin\appdata\local\temp\tmp1l50foxo.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:4780
  • C:\Windows\ohwqcuufxkujzlopwi.exe
    ohwqcuufxkujzlopwi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4068
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4972
  • C:\Windows\ztjerklxqepfwjnpxke.exe
    ztjerklxqepfwjnpxke.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3360
  • C:\Windows\ypcueusbrckxlvwv.exe
    ypcueusbrckxlvwv.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1124
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\ypcueusbrckxlvwv.exe*."
      2⤵
      • Executes dropped EXE
      PID:4584
  • C:\Windows\ztjerklxqepfwjnpxke.exe
    ztjerklxqepfwjnpxke.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1120
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\ztjerklxqepfwjnpxke.exe*."
      2⤵
      • Executes dropped EXE
      PID:1792
  • C:\Users\Admin\AppData\Local\Temp\ohwqcuufxkujzlopwi.exe
    C:\Users\Admin\AppData\Local\Temp\ohwqcuufxkujzlopwi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:560
  • C:\Users\Admin\AppData\Local\Temp\mhyuicerlamdvjoraoja.exe
    C:\Users\Admin\AppData\Local\Temp\mhyuicerlamdvjoraoja.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2404
  • C:\Windows\fxlepgfpgsbpeprrx.exe
    fxlepgfpgsbpeprrx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:468
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\fxlepgfpgsbpeprrx.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:1676
  • C:\Users\Admin\AppData\Local\Temp\bxpmbwzniyldwlrvfuqif.exe
    C:\Users\Admin\AppData\Local\Temp\bxpmbwzniyldwlrvfuqif.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2936
  • C:\Windows\ypcueusbrckxlvwv.exe
    ypcueusbrckxlvwv.exe
    1⤵
    • Executes dropped EXE
    PID:896
  • C:\Windows\bxpmbwzniyldwlrvfuqif.exe
    bxpmbwzniyldwlrvfuqif.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5040
  • C:\Users\Admin\AppData\Local\Temp\ypcueusbrckxlvwv.exe
    C:\Users\Admin\AppData\Local\Temp\ypcueusbrckxlvwv.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3356
  • C:\Windows\mhyuicerlamdvjoraoja.exe
    mhyuicerlamdvjoraoja.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2824
  • C:\Windows\mhyuicerlamdvjoraoja.exe
    mhyuicerlamdvjoraoja.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2968
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\mhyuicerlamdvjoraoja.exe*."
      2⤵
      • Executes dropped EXE
      PID:2664
  • C:\Windows\bxpmbwzniyldwlrvfuqif.exe
    bxpmbwzniyldwlrvfuqif.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2628
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\bxpmbwzniyldwlrvfuqif.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:1548
  • C:\Windows\fxlepgfpgsbpeprrx.exe
    fxlepgfpgsbpeprrx.exe
    1⤵
    • Executes dropped EXE
    PID:2536
  • C:\Users\Admin\AppData\Local\Temp\fxlepgfpgsbpeprrx.exe
    C:\Users\Admin\AppData\Local\Temp\fxlepgfpgsbpeprrx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4628
  • C:\Users\Admin\AppData\Local\Temp\ztjerklxqepfwjnpxke.exe
    C:\Users\Admin\AppData\Local\Temp\ztjerklxqepfwjnpxke.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4020
  • C:\Windows\ohwqcuufxkujzlopwi.exe
    ohwqcuufxkujzlopwi.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
      "C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe" "c:\windows\ohwqcuufxkujzlopwi.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

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

        bhjqp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bhjqp.exe
        • Size 712KB
        • SHA256 75bf607f3eb26ddba742062e97a170e85d36326b308c9f9a231ffe3dcf73f13e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        jmudieyytwe.exe
        • Path C:\Users\Admin\AppData\Local\Temp\jmudieyytwe.exe
        • Size 320KB
        • SHA256 73c4520c4453bfbba5e2c474c41cb8349b113720d22d24b6460ab0ffca836c86
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        cdacwwexxskhfzkticdacw.exx
        • Path C:\Users\Admin\AppData\Local\cdacwwexxskhfzkticdacw.exx
        • Size 280B
        • SHA256 8081c2d8160d98ebbf7b904a057dd58184e043ad9939ca448b3ca29b89abc045
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tfnafqjnyehpydzttyksfkvosdjmudiey.dpx
        • Path C:\Users\Admin\AppData\Local\tfnafqjnyehpydzttyksfkvosdjmudiey.dpx
        • Size 4KB
        • SHA256 ba9fb817f20befbc56a1d59ba67b86ac28f800f832333fa4ae57c15517d57fd0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ohwqcuufxkujzlopwi.exe
        • Path C:\Windows\SysWOW64\ohwqcuufxkujzlopwi.exe
        • Size 516KB
        • SHA256 f3cb92699801b3fd4ca75d9e7a09d1b40b0a4591399753c4222c0b6385d8c897
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download