Overview

overview

10

Static

static

3

tmptxf3sp01.exe

windows10-ltsc_2021-x64

10

tmptxf3sp01.exe

windows10-2004-x64

10

tmptxf3sp01.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    02/06/2026, 02:43

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General

  • Target
    tmptxf3sp01.exe
  • Size 1016KB
  • Sample260602-c7pgksdv4l
  • SHA256 838b5dac39dcd84b714969960bf3809f9fe66c8ac63195441824808511d80687
  • 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 35 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 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 4 IoCs

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

  • Drops autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • 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 17 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\tmptxf3sp01.exe
    "C:\Users\Admin\AppData\Local\Temp\tmptxf3sp01.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4624
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\users\admin\appdata\local\temp\tmptxf3sp01.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:2668
      • C:\Users\Admin\AppData\Local\Temp\uhioefr.exe
        "C:\Users\Admin\AppData\Local\Temp\uhioefr.exe" "-C:\Users\Admin\AppData\Local\Temp\tpzonxsayiyuctmc.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 autorun.inf file
        • 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:3596
      • C:\Users\Admin\AppData\Local\Temp\uhioefr.exe
        "C:\Users\Admin\AppData\Local\Temp\uhioefr.exe" "-C:\Users\Admin\AppData\Local\Temp\tpzonxsayiyuctmc.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:4788
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\users\admin\appdata\local\temp\tmptxf3sp01.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:2464
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2320
  • C:\Windows\utgyanlwxkdcnhdwjuy.exe
    utgyanlwxkdcnhdwjuy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1292
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\utgyanlwxkdcnhdwjuy.exe*."
      2⤵
      • Executes dropped EXE
      PID:3868
  • C:\Windows\jhtklxueeqigqjewis.exe
    jhtklxueeqigqjewis.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1192
  • C:\Users\Admin\AppData\Local\Temp\hhvorfeqsgaamheymydd.exe
    C:\Users\Admin\AppData\Local\Temp\hhvorfeqsgaamheymydd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:336
  • C:\Windows\utgyanlwxkdcnhdwjuy.exe
    utgyanlwxkdcnhdwjuy.exe
    1⤵
    • Executes dropped EXE
    PID:352
  • C:\Windows\hhvorfeqsgaamheymydd.exe
    hhvorfeqsgaamheymydd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4312
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\hhvorfeqsgaamheymydd.exe*."
      2⤵
      • Executes dropped EXE
      PID:424
  • C:\Users\Admin\AppData\Local\Temp\axiyyjfonypmvnhyj.exe
    C:\Users\Admin\AppData\Local\Temp\axiyyjfonypmvnhyj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:964
  • C:\Users\Admin\AppData\Local\Temp\utgyanlwxkdcnhdwjuy.exe
    C:\Users\Admin\AppData\Local\Temp\utgyanlwxkdcnhdwjuy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2152
  • C:\Windows\axiyyjfonypmvnhyj.exe
    axiyyjfonypmvnhyj.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4976
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\axiyyjfonypmvnhyj.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:4776
  • C:\Users\Admin\AppData\Local\Temp\wxmgkzzmpezanjhcrekla.exe
    C:\Users\Admin\AppData\Local\Temp\wxmgkzzmpezanjhcrekla.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5008
  • C:\Windows\axiyyjfonypmvnhyj.exe
    axiyyjfonypmvnhyj.exe
    1⤵
    • Executes dropped EXE
    PID:2500
  • C:\Windows\wxmgkzzmpezanjhcrekla.exe
    wxmgkzzmpezanjhcrekla.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2192
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\wxmgkzzmpezanjhcrekla.exe*."
      2⤵
      • Executes dropped EXE
      PID:3488
  • C:\Users\Admin\AppData\Local\Temp\tpzonxsayiyuctmc.exe
    C:\Users\Admin\AppData\Local\Temp\tpzonxsayiyuctmc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4260
  • C:\Windows\jhtklxueeqigqjewis.exe
    jhtklxueeqigqjewis.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:132
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\jhtklxueeqigqjewis.exe*."
      2⤵
      • Executes dropped EXE
      PID:4488
  • C:\Windows\tpzonxsayiyuctmc.exe
    tpzonxsayiyuctmc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:248
  • C:\Windows\tpzonxsayiyuctmc.exe
    tpzonxsayiyuctmc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4840
    • C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
      "C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe" "c:\windows\tpzonxsayiyuctmc.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:852
  • C:\Windows\hhvorfeqsgaamheymydd.exe
    hhvorfeqsgaamheymydd.exe
    1⤵
    • Executes dropped EXE
    PID:3204
  • C:\Windows\wxmgkzzmpezanjhcrekla.exe
    wxmgkzzmpezanjhcrekla.exe
    1⤵
    • Executes dropped EXE
    PID:4884
  • C:\Users\Admin\AppData\Local\Temp\jhtklxueeqigqjewis.exe
    C:\Users\Admin\AppData\Local\Temp\jhtklxueeqigqjewis.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3260

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Replication Through Removable Media

        1
        T1091

        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

        Replication Through Removable Media

        1
        T1091

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        bjfgrnuoyuweybgieyltpqbx.yie
        • Path C:\Program Files (x86)\bjfgrnuoyuweybgieyltpqbx.yie
        • Size 280B
        • SHA256 302d1b5ba968a003add15e5bcd1f30e7968c42357cf2e8cff6c9d1535c701e63
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bjfgrnuoyuweybgieyltpqbx.yie
        • Path C:\Program Files (x86)\bjfgrnuoyuweybgieyltpqbx.yie
        • Size 280B
        • SHA256 e78f8fa618c05f78d218c5daeed87cf45e3a0b7610f0bc50d963b6cbacdc03a2
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bjfgrnuoyuweybgieyltpqbx.yie
        • Path C:\Program Files (x86)\bjfgrnuoyuweybgieyltpqbx.yie
        • Size 280B
        • SHA256 0a88db05a2e41745c04bff665b0c6eaa5d1bd63e9737811b8ee57a946487db38
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        pgjvjuzczqt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\pgjvjuzczqt.exe
        • Size 320KB
        • SHA256 c83ff08e9d4a5ece57d589318a333810b59059237f9b2e95f49581233ffca129
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        uhioefr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\uhioefr.exe
        • Size 684KB
        • SHA256 68710ab806f8c1ad2bf667b69d0f77a6fa9ae9a784057ef03d5ed4a42b295d66
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        RCXEF2A.tmp
        • Path C:\Users\Admin\AppData\Local\Temp\uhioefr\RCXEF2A.tmp
        • Size 1.1MB
        • SHA256 4a79dba86d6bb48391d46a335be65ed939cc4ce531588aa1a2e6704602ac2296
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bjfgrnuoyuweybgieyltpqbx.yie
        • Path C:\Users\Admin\AppData\Local\bjfgrnuoyuweybgieyltpqbx.yie
        • Size 280B
        • SHA256 33a1b5a08f8a435d265c87018e5b5a559201993b8f315561eae2110859229556
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        kdkwszrwrylejxnahmkdkwszrwrylejxnah.kdk
        • Path C:\Users\Admin\AppData\Local\kdkwszrwrylejxnahmkdkwszrwrylejxnah.kdk
        • Size 4KB
        • SHA256 e8367b98c62686b6f9693593e67a9e28ee965294889b27d9d20eaf02e91d5840
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        jhtklxueeqigqjewis.exe
        • Path C:\Windows\SysWOW64\jhtklxueeqigqjewis.exe
        • Size 1016KB
        • SHA256 838b5dac39dcd84b714969960bf3809f9fe66c8ac63195441824808511d80687
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download