Overview

overview

10

Static

static

3

tmpd0xwiw4x.exe

windows10-ltsc_2021-x64

10

tmpd0xwiw4x.exe

windows10-2004-x64

10

tmpd0xwiw4x.exe

windows11-21h2-x64

10

Analysis

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

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    22/05/2026, 14:58

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General

  • Target
    tmpd0xwiw4x.exe
  • Size 612KB
  • Sample260522-schcsag16y
  • SHA256 034cd97620ef3015085fa2adfb8cc39cf6d9afac417f973b0cf9be6e5ad50617
  • 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 38 IoCs
    persistence
  • Disables RegEdit via registry modification 6 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 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 4 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\tmpd0xwiw4x.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpd0xwiw4x.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4420
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmpd0xwiw4x.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:1952
      • C:\Users\Admin\AppData\Local\Temp\uhixcdr.exe
        "C:\Users\Admin\AppData\Local\Temp\uhixcdr.exe" "-C:\Users\Admin\AppData\Local\Temp\tpzxlvsiwwfadhmy.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:5064
      • C:\Users\Admin\AppData\Local\Temp\uhixcdr.exe
        "C:\Users\Admin\AppData\Local\Temp\uhixcdr.exe" "-C:\Users\Admin\AppData\Local\Temp\tpzxlvsiwwfadhmy.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:3608
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmpd0xwiw4x.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:3612
  • C:\Windows\jhttjvumcepmrxesnd.exe
    jhttjvumcepmrxesnd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4776
  • C:\Users\Admin\AppData\Local\Temp\tpzxlvsiwwfadhmy.exe
    C:\Users\Admin\AppData\Local\Temp\tpzxlvsiwwfadhmy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:420
  • C:\Windows\hhvxpdeyquhgnveurjjx.exe
    hhvxpdeyquhgnveurjjx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4912
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\hhvxpdeyquhgnveurjjx.exe*."
      2⤵
      • Executes dropped EXE
      PID:4840
  • C:\Windows\wxmpixzunsggoxhywpqfi.exe
    wxmpixzunsggoxhywpqfi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1732
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4896
  • C:\Windows\wxmpixzunsggoxhywpqfi.exe
    wxmpixzunsggoxhywpqfi.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\wxmpixzunsggoxhywpqfi.exe*."
      2⤵
      • Executes dropped EXE
      PID:1632
  • C:\Users\Admin\AppData\Local\Temp\axihwhfwlmwswbhuo.exe
    C:\Users\Admin\AppData\Local\Temp\axihwhfwlmwswbhuo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4744
  • C:\Windows\tpzxlvsiwwfadhmy.exe
    tpzxlvsiwwfadhmy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3996
  • C:\Windows\utghyllevykiovdsofe.exe
    utghyllevykiovdsofe.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5040
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\utghyllevykiovdsofe.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:3980
  • C:\Windows\jhttjvumcepmrxesnd.exe
    jhttjvumcepmrxesnd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1052
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\jhttjvumcepmrxesnd.exe*."
      2⤵
      • Executes dropped EXE
      PID:3036
  • C:\Users\Admin\AppData\Local\Temp\wxmpixzunsggoxhywpqfi.exe
    C:\Users\Admin\AppData\Local\Temp\wxmpixzunsggoxhywpqfi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5016
  • C:\Windows\utghyllevykiovdsofe.exe
    utghyllevykiovdsofe.exe
    1⤵
    • Executes dropped EXE
    PID:2452
  • C:\Users\Admin\AppData\Local\Temp\jhttjvumcepmrxesnd.exe
    C:\Users\Admin\AppData\Local\Temp\jhttjvumcepmrxesnd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1468
  • C:\Windows\hhvxpdeyquhgnveurjjx.exe
    hhvxpdeyquhgnveurjjx.exe
    1⤵
    • Executes dropped EXE
    PID:836
  • C:\Windows\axihwhfwlmwswbhuo.exe
    axihwhfwlmwswbhuo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:732
  • C:\Users\Admin\AppData\Local\Temp\utghyllevykiovdsofe.exe
    C:\Users\Admin\AppData\Local\Temp\utghyllevykiovdsofe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4884
  • C:\Users\Admin\AppData\Local\Temp\hhvxpdeyquhgnveurjjx.exe
    C:\Users\Admin\AppData\Local\Temp\hhvxpdeyquhgnveurjjx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4856
  • C:\Windows\axihwhfwlmwswbhuo.exe
    axihwhfwlmwswbhuo.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4932
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\axihwhfwlmwswbhuo.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:4004
  • C:\Windows\tpzxlvsiwwfadhmy.exe
    tpzxlvsiwwfadhmy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3004
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\tpzxlvsiwwfadhmy.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:5032

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

        System Information Discovery

        2
        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

        nxvhjhswymjsjbuubdnlxzximo.ziz
        • Path C:\Program Files (x86)\nxvhjhswymjsjbuubdnlxzximo.ziz
        • Size 272B
        • SHA256 e0ed99c336fafa15de725941b0cffb8111e623c25066103dc3c77fd5ce5b197e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nxvhjhswymjsjbuubdnlxzximo.ziz
        • Path C:\Program Files (x86)\nxvhjhswymjsjbuubdnlxzximo.ziz
        • Size 272B
        • SHA256 ce5b880ebda794cccc646503e81c16da5b816e3befef9219f8b0390294d7c63d
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dhxvuubpnrh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
        • Size 320KB
        • SHA256 0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        uhixcdr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\uhixcdr.exe
        • Size 728KB
        • SHA256 048bb6014c0ccad038937d822a05c435b3753060e9ba9f4c559ea474f5750e9c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nxvhjhswymjsjbuubdnlxzximo.ziz
        • Path C:\Users\Admin\AppData\Local\nxvhjhswymjsjbuubdnlxzximo.ziz
        • Size 272B
        • SHA256 145815992443b7fbf9b76129fc0cd7d953798195577642bb69041f5f5f713e24
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ojspclhwjiqkmptewjenkxgcredlfhkozrezi.sbx
        • Path C:\Users\Admin\AppData\Local\ojspclhwjiqkmptewjenkxgcredlfhkozrezi.sbx
        • Size 3KB
        • SHA256 375c1092945f56f9cbfe5d4f3e529963f4323716778dfde5ade69e67c25c6dc7
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        jhttjvumcepmrxesnd.exe
        • Path C:\Windows\SysWOW64\jhttjvumcepmrxesnd.exe
        • Size 612KB
        • SHA256 034cd97620ef3015085fa2adfb8cc39cf6d9afac417f973b0cf9be6e5ad50617
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download