Overview

overview

10

Static

static

3

tmpxtrlx0io.exe

windows10-ltsc_2021-x64

10

tmpxtrlx0io.exe

windows10-2004-x64

10

tmpxtrlx0io.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    22/05/2026, 14:44

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General

  • Target
    tmpxtrlx0io.exe
  • Size 592KB
  • Sample260522-r4ce6set5p
  • SHA256 95cb74bdf85aeefa394ffffe9fed5c4bcd75ea11621a67882f364d827b42e037
  • 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 36 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 7 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 9 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpxtrlx0io.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpxtrlx0io.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5044
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\users\admin\appdata\local\temp\tmpxtrlx0io.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:3040
      • C:\Users\Admin\AppData\Local\Temp\bjjlu.exe
        "C:\Users\Admin\AppData\Local\Temp\bjjlu.exe" "-C:\Users\Admin\AppData\Local\Temp\yrcpjbsaqiabhucv.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:2180
      • C:\Users\Admin\AppData\Local\Temp\bjjlu.exe
        "C:\Users\Admin\AppData\Local\Temp\bjjlu.exe" "-C:\Users\Admin\AppData\Local\Temp\yrcpjbsaqiabhucv.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:2664
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\users\admin\appdata\local\temp\tmpxtrlx0io.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:644
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2124
  • C:\Windows\fzlzunfofyrtaoxre.exe
    fzlzunfofyrtaoxre.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1960
  • C:\Windows\zvjzwrlwpkfjsitpeqd.exe
    zvjzwrlwpkfjsitpeqd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:220
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\zvjzwrlwpkfjsitpeqd.exe*."
      2⤵
      • Executes dropped EXE
      PID:780
  • C:\Windows\mjypnjeqkgchriurhuif.exe
    mjypnjeqkgchriurhuif.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4940
  • C:\Windows\bzphgdzmhebhskxvmapnd.exe
    bzphgdzmhebhskxvmapnd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\bzphgdzmhebhskxvmapnd.exe*."
      2⤵
      • Executes dropped EXE
      PID:3440
  • C:\Users\Admin\AppData\Local\Temp\bzphgdzmhebhskxvmapnd.exe
    C:\Users\Admin\AppData\Local\Temp\bzphgdzmhebhskxvmapnd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1072
  • C:\Users\Admin\AppData\Local\Temp\mjypnjeqkgchriurhuif.exe
    C:\Users\Admin\AppData\Local\Temp\mjypnjeqkgchriurhuif.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5040
  • C:\Windows\ojwlhbuewqknvkupdo.exe
    ojwlhbuewqknvkupdo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2228
  • C:\Windows\ojwlhbuewqknvkupdo.exe
    ojwlhbuewqknvkupdo.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2272
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\ojwlhbuewqknvkupdo.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:5040
  • C:\Users\Admin\AppData\Local\Temp\yrcpjbsaqiabhucv.exe
    C:\Users\Admin\AppData\Local\Temp\yrcpjbsaqiabhucv.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4124
  • C:\Users\Admin\AppData\Local\Temp\ojwlhbuewqknvkupdo.exe
    C:\Users\Admin\AppData\Local\Temp\ojwlhbuewqknvkupdo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3488
  • C:\Windows\yrcpjbsaqiabhucv.exe
    yrcpjbsaqiabhucv.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4940
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\yrcpjbsaqiabhucv.exe*."
      2⤵
      • Executes dropped EXE
      PID:1724
  • C:\Users\Admin\AppData\Local\Temp\fzlzunfofyrtaoxre.exe
    C:\Users\Admin\AppData\Local\Temp\fzlzunfofyrtaoxre.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3848
  • C:\Windows\yrcpjbsaqiabhucv.exe
    yrcpjbsaqiabhucv.exe
    1⤵
    • Executes dropped EXE
    PID:3216
  • C:\Windows\fzlzunfofyrtaoxre.exe
    fzlzunfofyrtaoxre.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\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\fzlzunfofyrtaoxre.exe*."
      2⤵
      • Executes dropped EXE
      PID:3004
  • C:\Windows\mjypnjeqkgchriurhuif.exe
    mjypnjeqkgchriurhuif.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2872
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\mjypnjeqkgchriurhuif.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:3116
  • C:\Users\Admin\AppData\Local\Temp\zvjzwrlwpkfjsitpeqd.exe
    C:\Users\Admin\AppData\Local\Temp\zvjzwrlwpkfjsitpeqd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1204
  • C:\Windows\zvjzwrlwpkfjsitpeqd.exe
    zvjzwrlwpkfjsitpeqd.exe
    1⤵
    • Executes dropped EXE
    PID:3104
  • C:\Windows\bzphgdzmhebhskxvmapnd.exe
    bzphgdzmhebhskxvmapnd.exe
    1⤵
    • Executes dropped EXE
    PID:4644

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

        bjjlu.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bjjlu.exe
        • Size 704KB
        • SHA256 2db9827fa28aa4eb6e5c6426335404ebfec44b2cbc5cecd701ea395cfc7beffb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        rnowznuybxy.exe
        • Path C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
        • Size 320KB
        • SHA256 14ac6eb6f4b8fdff14e5391e728628cc830a0a4ec96816d22937e76605414096
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dfzvyzzqpqrbqmdfaslnh.ghh
        • Path C:\Users\Admin\AppData\Local\dfzvyzzqpqrbqmdfaslnh.ghh
        • Size 280B
        • SHA256 75610ffddf309756553b51354f83f4950c8d79dfe2a57ed73636c03848a60eec
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ylqxlxikugsnnuwjpswjovjvgiseqlls.hnq
        • Path C:\Users\Admin\AppData\Local\ylqxlxikugsnnuwjpswjovjvgiseqlls.hnq
        • Size 4KB
        • SHA256 74143cedcf8a49d681820538c5a509e5d6c6a8558df116ecc1a38be15f802506
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ojwlhbuewqknvkupdo.exe
        • Path C:\Windows\SysWOW64\ojwlhbuewqknvkupdo.exe
        • Size 592KB
        • SHA256 95cb74bdf85aeefa394ffffe9fed5c4bcd75ea11621a67882f364d827b42e037
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download