Overview

overview

10

Static

static

3

tmpszni3y8b.exe

windows10-ltsc_2021-x64

10

tmpszni3y8b.exe

windows10-2004-x64

10

tmpszni3y8b.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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, 03:36

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General

  • Target
    tmpszni3y8b.exe
  • Size 656KB
  • Sample260602-d54ddsc13x
  • SHA256 9aab7948f428921efcc735e88e5adad78ff27a73e6cb2d54d9cfddae3286cf22
  • 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 7 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 8 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\tmpszni3y8b.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpszni3y8b.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2844
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\users\admin\appdata\local\temp\tmpszni3y8b.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:4512
      • C:\Users\Admin\AppData\Local\Temp\bcnnv.exe
        "C:\Users\Admin\AppData\Local\Temp\bcnnv.exe" "-C:\Users\Admin\AppData\Local\Temp\ykgrkxocyircqeah.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:1808
      • C:\Users\Admin\AppData\Local\Temp\bcnnv.exe
        "C:\Users\Admin\AppData\Local\Temp\bcnnv.exe" "-C:\Users\Admin\AppData\Local\Temp\ykgrkxocyircqeah.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:3756
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\users\admin\appdata\local\temp\tmpszni3y8b.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:1332
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2516
  • C:\Windows\ykgrkxocyircqeah.exe
    ykgrkxocyircqeah.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:212
  • C:\Users\Admin\AppData\Local\Temp\mccrofassgtiassddqiy.exe
    C:\Users\Admin\AppData\Local\Temp\mccrofassgtiassddqiy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4800
  • C:\Users\Admin\AppData\Local\Temp\ykgrkxocyircqeah.exe
    C:\Users\Admin\AppData\Local\Temp\ykgrkxocyircqeah.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4380
  • C:\Windows\ocanixqgeqboeusbzk.exe
    ocanixqgeqboeusbzk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\ocanixqgeqboeusbzk.exe*."
      2⤵
      • Executes dropped EXE
      PID:1852
  • C:\Windows\fspbvjbqnyiujyvda.exe
    fspbvjbqnyiujyvda.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4844
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\fspbvjbqnyiujyvda.exe*."
      2⤵
      • Executes dropped EXE
      PID:1964
  • C:\Windows\mccrofassgtiassddqiy.exe
    mccrofassgtiassddqiy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1016
  • C:\Windows\fspbvjbqnyiujyvda.exe
    fspbvjbqnyiujyvda.exe
    1⤵
    • Executes dropped EXE
    PID:3164
  • C:\Windows\ykgrkxocyircqeah.exe
    ykgrkxocyircqeah.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4748
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\ykgrkxocyircqeah.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:912
  • C:\Windows\ocanixqgeqboeusbzk.exe
    ocanixqgeqboeusbzk.exe
    1⤵
    • Executes dropped EXE
    PID:1368
  • C:\Windows\mccrofassgtiassddqiy.exe
    mccrofassgtiassddqiy.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3832
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\mccrofassgtiassddqiy.exe*."
      2⤵
      • Executes dropped EXE
      PID:1788
  • C:\Users\Admin\AppData\Local\Temp\zonbxnhyxkwkbsrbamd.exe
    C:\Users\Admin\AppData\Local\Temp\zonbxnhyxkwkbsrbamd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4288
  • C:\Users\Admin\AppData\Local\Temp\ocanixqgeqboeusbzk.exe
    C:\Users\Admin\AppData\Local\Temp\ocanixqgeqboeusbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4200
  • C:\Windows\bstjhzvopesibuvhiwpgh.exe
    bstjhzvopesibuvhiwpgh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2984
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\bstjhzvopesibuvhiwpgh.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3584
  • C:\Users\Admin\AppData\Local\Temp\bstjhzvopesibuvhiwpgh.exe
    C:\Users\Admin\AppData\Local\Temp\bstjhzvopesibuvhiwpgh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4392
  • C:\Users\Admin\AppData\Local\Temp\fspbvjbqnyiujyvda.exe
    C:\Users\Admin\AppData\Local\Temp\fspbvjbqnyiujyvda.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3580
  • C:\Windows\zonbxnhyxkwkbsrbamd.exe
    zonbxnhyxkwkbsrbamd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4004
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\zonbxnhyxkwkbsrbamd.exe*."
      2⤵
      • Executes dropped EXE
      PID:3476
  • C:\Windows\zonbxnhyxkwkbsrbamd.exe
    zonbxnhyxkwkbsrbamd.exe
    1⤵
    • Executes dropped EXE
    PID:4464
  • C:\Windows\bstjhzvopesibuvhiwpgh.exe
    bstjhzvopesibuvhiwpgh.exe
    1⤵
    • Executes dropped EXE
    PID:2852

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

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        Downloads

        sscbijoqayvuwyidnkmmwvcdik.spo
        • Path C:\Program Files (x86)\sscbijoqayvuwyidnkmmwvcdik.spo
        • Size 272B
        • SHA256 b4df9beb90fe59a3fe8c0c5ecd3b8f32f0b8d4b14dc9890dedc6a33de2c2637b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sscbijoqayvuwyidnkmmwvcdik.spo
        • Path C:\Program Files (x86)\sscbijoqayvuwyidnkmmwvcdik.spo
        • Size 272B
        • SHA256 bdf887aa432042253ace75b780cf3c97415f20a16306b6a5ac5b4ebff84e1c5b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sscbijoqayvuwyidnkmmwvcdik.spo
        • Path C:\Program Files (x86)\sscbijoqayvuwyidnkmmwvcdik.spo
        • Size 272B
        • SHA256 b728712647a512dca90bf1cce6b2398b5b0ca88b16f59275355d39d052b2da72
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sscbijoqayvuwyidnkmmwvcdik.spo
        • Path C:\Program Files (x86)\sscbijoqayvuwyidnkmmwvcdik.spo
        • Size 272B
        • SHA256 178be9d809532d2f304821fec7bfe1251f85bf901a800694b0b9dbe0fb84234e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bcnnv.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bcnnv.exe
        • Size 700KB
        • SHA256 736c2b42c742c551d063369e9085cc3ffef74179c047dd4314ac74830450b368
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ioxgxzqusyh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
        • Size 320KB
        • SHA256 c8c542ac3f6526d1501c2b9d6262bfa029a1ac0d9dd6b3c1965977abdd8bd126
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        sscbijoqayvuwyidnkmmwvcdik.spo
        • Path C:\Users\Admin\AppData\Local\sscbijoqayvuwyidnkmmwvcdik.spo
        • Size 272B
        • SHA256 4d11bd63b4536cadc957607c2e0ab67b979d25b14898f72eea3103ae5acea162
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tezjbndqlucmzmhniqdojtlxnavemwjwrxsan.tdv
        • Path C:\Users\Admin\AppData\Local\tezjbndqlucmzmhniqdojtlxnavemwjwrxsan.tdv
        • Size 3KB
        • SHA256 e4f0d88156ae1fe1c6d1016417dbe6261c6476de4359f04edec4e3c7cd25933e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ocanixqgeqboeusbzk.exe
        • Path C:\Windows\SysWOW64\ocanixqgeqboeusbzk.exe
        • Size 656KB
        • SHA256 9aab7948f428921efcc735e88e5adad78ff27a73e6cb2d54d9cfddae3286cf22
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        tarxltfofko.bat
        • Path C:\tarxltfofko.bat
        • Size 556KB
        • SHA256 31b0aef3382e55cfa91f800c1dcedd91f51b3095652981c8e79e36092a2c23f8
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download