Overview

overview

10

Static

static

3

tmp_y4twmt8.exe

windows10-ltsc_2021-x64

10

tmp_y4twmt8.exe

windows10-2004-x64

10

tmp_y4twmt8.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/06/2026, 02:55

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General

  • Target
    tmp_y4twmt8.exe
  • Size 1016KB
  • Sample260602-dewkvsct3t
  • SHA256 f13e9a8bdf97c08930e2697bae6b69e648ba1cce905f82aef08a25bc540af67f
  • 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 34 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 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 13 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\tmp_y4twmt8.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp_y4twmt8.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4604
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\users\admin\appdata\local\temp\tmp_y4twmt8.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:3804
      • C:\Users\Admin\AppData\Local\Temp\dcgqv.exe
        "C:\Users\Admin\AppData\Local\Temp\dcgqv.exe" "-C:\Users\Admin\AppData\Local\Temp\akzukzqivircqeah.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:2164
      • C:\Users\Admin\AppData\Local\Temp\dcgqv.exe
        "C:\Users\Admin\AppData\Local\Temp\dcgqv.exe" "-C:\Users\Admin\AppData\Local\Temp\akzukzqivircqeah.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:3704
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\users\admin\appdata\local\temp\tmp_y4twmt8.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:4744
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2700
  • C:\Windows\ocvuohcypgtiassddqky.exe
    ocvuohcypgtiassddqky.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5084
  • C:\Windows\bogexpjeukwkbsrbamf.exe
    bogexpjeukwkbsrbamf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3716
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\bogexpjeukwkbsrbamf.exe*."
      2⤵
      • Executes dropped EXE
      PID:5100
  • C:\Windows\dsmmhbxumesibuvhiwrga.exe
    dsmmhbxumesibuvhiwrga.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1748
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\dsmmhbxumesibuvhiwrga.exe*."
      2⤵
      • Executes dropped EXE
      PID:720
  • C:\Windows\dsmmhbxumesibuvhiwrga.exe
    dsmmhbxumesibuvhiwrga.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2504
  • C:\Users\Admin\AppData\Local\Temp\akzukzqivircqeah.exe
    C:\Users\Admin\AppData\Local\Temp\akzukzqivircqeah.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4428
  • C:\Users\Admin\AppData\Local\Temp\bogexpjeukwkbsrbamf.exe
    C:\Users\Admin\AppData\Local\Temp\bogexpjeukwkbsrbamf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3920
  • C:\Windows\ocvuohcypgtiassddqky.exe
    ocvuohcypgtiassddqky.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3784
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\ocvuohcypgtiassddqky.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:3300
  • C:\Windows\bogexpjeukwkbsrbamf.exe
    bogexpjeukwkbsrbamf.exe
    1⤵
    • Executes dropped EXE
    PID:4516
  • C:\Windows\qctqizsmbqboeusbzk.exe
    qctqizsmbqboeusbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4464
  • C:\Windows\hsievldwkyiujyvda.exe
    hsievldwkyiujyvda.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2304
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\hsievldwkyiujyvda.exe*."
      2⤵
      • Executes dropped EXE
      PID:1672
  • C:\Windows\akzukzqivircqeah.exe
    akzukzqivircqeah.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:548
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\akzukzqivircqeah.exe*."
      2⤵
      • Executes dropped EXE
      PID:2172
  • C:\Users\Admin\AppData\Local\Temp\ocvuohcypgtiassddqky.exe
    C:\Users\Admin\AppData\Local\Temp\ocvuohcypgtiassddqky.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4940
  • C:\Users\Admin\AppData\Local\Temp\hsievldwkyiujyvda.exe
    C:\Users\Admin\AppData\Local\Temp\hsievldwkyiujyvda.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1388
  • C:\Windows\akzukzqivircqeah.exe
    akzukzqivircqeah.exe
    1⤵
    • Executes dropped EXE
    PID:3820
  • C:\Windows\qctqizsmbqboeusbzk.exe
    qctqizsmbqboeusbzk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2724
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\qctqizsmbqboeusbzk.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:4028
  • C:\Windows\hsievldwkyiujyvda.exe
    hsievldwkyiujyvda.exe
    1⤵
    • Executes dropped EXE
    PID:2440
  • C:\Users\Admin\AppData\Local\Temp\dsmmhbxumesibuvhiwrga.exe
    C:\Users\Admin\AppData\Local\Temp\dsmmhbxumesibuvhiwrga.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:620
  • C:\Users\Admin\AppData\Local\Temp\qctqizsmbqboeusbzk.exe
    C:\Users\Admin\AppData\Local\Temp\qctqizsmbqboeusbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4628

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

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        Downloads

        nkmuxzdiiiecdenhqmpmowzbf.kkg
        • Path C:\Program Files (x86)\nkmuxzdiiiecdenhqmpmowzbf.kkg
        • Size 280B
        • SHA256 dbeec57c7d3dd6752026049d88cccacaaa1e677333cc2549a4ad602f4659d917
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nkmuxzdiiiecdenhqmpmowzbf.kkg
        • Path C:\Program Files (x86)\nkmuxzdiiiecdenhqmpmowzbf.kkg
        • Size 280B
        • SHA256 b1ff8680ce9c6834064e3102b3611e6f0f6e752b8c07a8826d02f034ac1badf0
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dcgqv.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dcgqv.exe
        • Size 720KB
        • SHA256 237788e558627f26457a9564d6c166f3c186a1176ea986d6ac7b153e3c0baeaf
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ioxgxzqusyh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
        • Size 320KB
        • SHA256 a253ebb7e2f2dc19fb4d5d581af5790813969585f3e5741ae150fc01e0df57d1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nkmuxzdiiiecdenhqmpmowzbf.kkg
        • Path C:\Users\Admin\AppData\Local\nkmuxzdiiiecdenhqmpmowzbf.kkg
        • Size 280B
        • SHA256 6c093089882286115b1b18ae166ea2d97f0fdc71acf150fbdb4822c11bb472e3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sanguhwmxipykwqvpwksfymzoepahqcoinho.kxq
        • Path C:\Users\Admin\AppData\Local\sanguhwmxipykwqvpwksfymzoepahqcoinho.kxq
        • Size 4KB
        • SHA256 d56f898c0a3b83eb5a62306f3104ed802369980c850908523e79cec6ddc2a68d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qctqizsmbqboeusbzk.exe
        • Path C:\Windows\SysWOW64\qctqizsmbqboeusbzk.exe
        • Size 1016KB
        • SHA256 f13e9a8bdf97c08930e2697bae6b69e648ba1cce905f82aef08a25bc540af67f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download