Overview

overview

10

Static

static

3

tmpfp0uk4lu.exe

windows10-ltsc_2021-x64

10

tmpfp0uk4lu.exe

windows10-2004-x64

10

tmpfp0uk4lu.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, 14:27

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General

  • Target
    tmpfp0uk4lu.exe
  • Size 576KB
  • Sample260522-rssm1sgs41
  • SHA256 1ed70970e81a93edb1e09878af5927c71fc6f16ec86b7a62ec444f858c97e7c0
  • 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\tmpfp0uk4lu.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpfp0uk4lu.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5792
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\users\admin\appdata\local\temp\tmpfp0uk4lu.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:4864
      • C:\Users\Admin\AppData\Local\Temp\cjptxcp.exe
        "C:\Users\Admin\AppData\Local\Temp\cjptxcp.exe" "-C:\Users\Admin\AppData\Local\Temp\brgtguqczhzhaohw.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:5724
      • C:\Users\Admin\AppData\Local\Temp\cjptxcp.exe
        "C:\Users\Admin\AppData\Local\Temp\cjptxcp.exe" "-C:\Users\Admin\AppData\Local\Temp\brgtguqczhzhaohw.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:1660
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\users\admin\appdata\local\temp\tmpfp0uk4lu.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:1064
  • C:\Windows\cvndtkjyyjeplcyqfug.exe
    cvndtkjyyjeplcyqfug.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2872
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\cvndtkjyyjeplcyqfug.exe*."
      2⤵
      • Executes dropped EXE
      PID:5128
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5428
  • C:\Windows\brgtguqczhzhaohw.exe
    brgtguqczhzhaohw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4988
  • C:\Windows\rjapeusgfpjtoezqes.exe
    rjapeusgfpjtoezqes.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:704
  • C:\Users\Admin\AppData\Local\Temp\pjctkccstfbnkczsiylf.exe
    C:\Users\Admin\AppData\Local\Temp\pjctkccstfbnkczsiylf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3984
  • C:\Users\Admin\AppData\Local\Temp\brgtguqczhzhaohw.exe
    C:\Users\Admin\AppData\Local\Temp\brgtguqczhzhaohw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4696
  • C:\Windows\eztldwxoqdanlecwnesnh.exe
    eztldwxoqdanlecwnesnh.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\eztldwxoqdanlecwnesnh.exe*."
      2⤵
      • Executes dropped EXE
      PID:3040
  • C:\Windows\izpdrgdqoxqzticsf.exe
    izpdrgdqoxqzticsf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2236
  • C:\Windows\eztldwxoqdanlecwnesnh.exe
    eztldwxoqdanlecwnesnh.exe
    1⤵
    • Executes dropped EXE
    PID:5648
  • C:\Windows\izpdrgdqoxqzticsf.exe
    izpdrgdqoxqzticsf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2612
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\izpdrgdqoxqzticsf.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:444
  • C:\Users\Admin\AppData\Local\Temp\eztldwxoqdanlecwnesnh.exe
    C:\Users\Admin\AppData\Local\Temp\eztldwxoqdanlecwnesnh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4372
  • C:\Windows\brgtguqczhzhaohw.exe
    brgtguqczhzhaohw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:556
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\brgtguqczhzhaohw.exe*."
      2⤵
      • Executes dropped EXE
      PID:2028
  • C:\Windows\cvndtkjyyjeplcyqfug.exe
    cvndtkjyyjeplcyqfug.exe
    1⤵
    • Executes dropped EXE
    PID:4556
  • C:\Users\Admin\AppData\Local\Temp\rjapeusgfpjtoezqes.exe
    C:\Users\Admin\AppData\Local\Temp\rjapeusgfpjtoezqes.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4364
  • C:\Users\Admin\AppData\Local\Temp\cvndtkjyyjeplcyqfug.exe
    C:\Users\Admin\AppData\Local\Temp\cvndtkjyyjeplcyqfug.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5284
  • C:\Windows\rjapeusgfpjtoezqes.exe
    rjapeusgfpjtoezqes.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3712
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\rjapeusgfpjtoezqes.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:4816
  • C:\Windows\pjctkccstfbnkczsiylf.exe
    pjctkccstfbnkczsiylf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3760
  • C:\Users\Admin\AppData\Local\Temp\izpdrgdqoxqzticsf.exe
    C:\Users\Admin\AppData\Local\Temp\izpdrgdqoxqzticsf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5852
  • C:\Windows\pjctkccstfbnkczsiylf.exe
    pjctkccstfbnkczsiylf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4196
    • C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe
      "C:\Users\Admin\AppData\Local\Temp\qthqeovcadr.exe" "c:\windows\pjctkccstfbnkczsiylf.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:4596

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

        cjptxcp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\cjptxcp.exe
        • Size 724KB
        • SHA256 786248e22bf9541e8fdf194ee7ffa6f4208e2745718cc8a032bd26060debc334
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        jlmlkksqztxrwwbcaytvwvuu.ajd
        • Path C:\Users\Admin\AppData\Local\jlmlkksqztxrwwbcaytvwvuu.ajd
        • Size 272B
        • SHA256 61e772eea23f75694a7b52031c49037077d3903f179d6846425c28fe44fc1472
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sfrblwpysxmrhsiudmsfrblwpysxmrhsiud.sfr
        • Path C:\Users\Admin\AppData\Local\sfrblwpysxmrhsiudmsfrblwpysxmrhsiud.sfr
        • Size 3KB
        • SHA256 6602e41e3d51ceaa95e7cf806ec1e8813049ff00de7dd8c728f792c7f92e1ee9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rjapeusgfpjtoezqes.exe
        • Path C:\Windows\SysWOW64\rjapeusgfpjtoezqes.exe
        • Size 576KB
        • SHA256 1ed70970e81a93edb1e09878af5927c71fc6f16ec86b7a62ec444f858c97e7c0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download