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
    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, 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 5 IoCs
    persistence
  • UAC bypass 3 TTPs 14 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 31 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 10 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 39 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 39 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 20 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 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp1l50foxo.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp1l50foxo.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5076
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.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
      • 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:3584
      • C:\Users\Admin\AppData\Local\Temp\vdisegj.exe
        "C:\Users\Admin\AppData\Local\Temp\vdisegj.exe" "-C:\Users\Admin\AppData\Local\Temp\ulzsnykfvimvqtxc.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:1972
      • C:\Users\Admin\AppData\Local\Temp\vdisegj.exe
        "C:\Users\Admin\AppData\Local\Temp\vdisegj.exe" "-C:\Users\Admin\AppData\Local\Temp\ulzsnykfvimvqtxc.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:772
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.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:4656
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3372
  • C:\Users\Admin\AppData\Local\Temp\idvsrgwvpgobahpyolez.exe
    C:\Users\Admin\AppData\Local\Temp\idvsrgwvpgobahpyolez.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:236
  • C:\Windows\kdtolymjbqwhejpwkf.exe
    kdtolymjbqwhejpwkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:240
  • C:\Windows\ulzsnykfvimvqtxc.exe
    ulzsnykfvimvqtxc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4916
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ulzsnykfvimvqtxc.exe*."
      2⤵
      • Executes dropped EXE
      PID:452
  • C:\Windows\idvsrgwvpgobahpyolez.exe
    idvsrgwvpgobahpyolez.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2564
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\idvsrgwvpgobahpyolez.exe*."
      2⤵
      • Executes dropped EXE
      PID:2364
  • C:\Windows\ulzsnykfvimvqtxc.exe
    ulzsnykfvimvqtxc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:472
  • C:\Users\Admin\AppData\Local\Temp\vpgcaodbukrdbhowlhz.exe
    C:\Users\Admin\AppData\Local\Temp\vpgcaodbukrdbhowlhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5000
  • C:\Windows\vpgcaodbukrdbhowlhz.exe
    vpgcaodbukrdbhowlhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:440
  • C:\Windows\kdtolymjbqwhejpwkf.exe
    kdtolymjbqwhejpwkf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2636
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\kdtolymjbqwhejpwkf.exe*."
      2⤵
      • Executes dropped EXE
      PID:4076
  • C:\Windows\vpgcaodbukrdbhowlhz.exe
    vpgcaodbukrdbhowlhz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3012
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\vpgcaodbukrdbhowlhz.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:2156
  • C:\Windows\bticykxtkydnjnsyl.exe
    bticykxtkydnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3432
  • C:\Users\Admin\AppData\Local\Temp\bticykxtkydnjnsyl.exe
    C:\Users\Admin\AppData\Local\Temp\bticykxtkydnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1528
  • C:\Windows\idvsrgwvpgobahpyolez.exe
    idvsrgwvpgobahpyolez.exe
    1⤵
    • Executes dropped EXE
    PID:2068
  • C:\Windows\System32\Conhost.exe
    \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
    1⤵
      PID:452
    • C:\Windows\System32\Conhost.exe
      \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
      1⤵
        PID:2364
      • C:\Windows\bticykxtkydnjnsyl.exe
        bticykxtkydnjnsyl.exe .
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2260
        • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
          "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\bticykxtkydnjnsyl.exe*."
          2⤵
          • Executes dropped EXE
          PID:2168
      • C:\Windows\xtmkkarrmenbbjsctrlha.exe
        xtmkkarrmenbbjsctrlha.exe
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2572
      • C:\Windows\xtmkkarrmenbbjsctrlha.exe
        xtmkkarrmenbbjsctrlha.exe .
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3528
        • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
          "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\xtmkkarrmenbbjsctrlha.exe*."
          2⤵
          • Executes dropped EXE
          PID:2780
      • C:\Users\Admin\AppData\Local\Temp\ulzsnykfvimvqtxc.exe
        C:\Users\Admin\AppData\Local\Temp\ulzsnykfvimvqtxc.exe
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1404
      • C:\Users\Admin\AppData\Local\Temp\kdtolymjbqwhejpwkf.exe
        C:\Users\Admin\AppData\Local\Temp\kdtolymjbqwhejpwkf.exe
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2276
      • C:\Users\Admin\AppData\Local\Temp\xtmkkarrmenbbjsctrlha.exe
        C:\Users\Admin\AppData\Local\Temp\xtmkkarrmenbbjsctrlha.exe
        1⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4076

      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

            xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Path C:\Program Files (x86)\xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Size 280B
            • SHA256 f3db0e49bc2380e7c2fadacb5b910a42a94339929fc40b0a00d267dc716eba15
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Path C:\Program Files (x86)\xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Size 280B
            • SHA256 58ed8392c4701414c31a8d25a2dff11e8c247e61e0d9d06875060d4f32bd2624
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Path C:\Program Files (x86)\xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Size 280B
            • SHA256 450d2fb6c6e34ae31e1a6c552df7b701d7f175e1adb277405a00367552d05dd9
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Path C:\Program Files (x86)\xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Size 280B
            • SHA256 ffd18d4729c27430bb15ebbe91b450c365877393c9c31a522ee560b032bc1644
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            dhxvuubpnrh.exe
            • Path C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
            • Size 320KB
            • SHA256 051ff96a779f8b72149e963ef586c60d958730fbba4e073164397f5dddad074c
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            vdisegj.exe
            • Path C:\Users\Admin\AppData\Local\Temp\vdisegj.exe
            • Size 708KB
            • SHA256 95d0e428b38a6c7c5b28fdb197a647a09ae1bdbc25e3851803b6ac82bbfadd12
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            ulzsnykfvimvqtxcohwnbupamhxkoxsvzeqjyp.wrc
            • Path C:\Users\Admin\AppData\Local\ulzsnykfvimvqtxcohwnbupamhxkoxsvzeqjyp.wrc
            • Size 4KB
            • SHA256 ea071ec2c3297ab275ba8c41c12f27c932d749f7b9dddb0d734e5fa014bb315d
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Path C:\Users\Admin\AppData\Local\xdgoyyzjoqjhrjcwxfjpsakklva.vtd
            • Size 280B
            • SHA256 1d87d49f40da89fa14849f793e065cf9b24792f58d5d8c727f95190c77649693
            • MD5 SHA1 SHA512 TLSH
            Submit Download

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