Overview

overview

10

Static

static

3

tmpod5b_sag.exe

windows10-ltsc_2021-x64

10

tmpod5b_sag.exe

windows10-2004-x64

10

tmpod5b_sag.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
    02/06/2026, 03:29

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General

  • Target
    tmpod5b_sag.exe
  • Size 508KB
  • Sample260602-d1445aes6m
  • SHA256 4bef104c72830617853df2551a2ff6630dcfebde00899ed36bfdc7e4b9fee596
  • 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 36 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 3 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpod5b_sag.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpod5b_sag.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3884
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\users\admin\appdata\local\temp\tmpod5b_sag.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:2324
      • C:\Users\Admin\AppData\Local\Temp\nuydgt.exe
        "C:\Users\Admin\AppData\Local\Temp\nuydgt.exe" "-C:\Users\Admin\AppData\Local\Temp\zqetgdsirhutdwzj.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:788
      • C:\Users\Admin\AppData\Local\Temp\nuydgt.exe
        "C:\Users\Admin\AppData\Local\Temp\nuydgt.exe" "-C:\Users\Admin\AppData\Local\Temp\zqetgdsirhutdwzj.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:2640
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\users\admin\appdata\local\temp\tmpod5b_sag.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:3908
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4816
  • C:\Windows\piypedumxpefrmrdyx.exe
    piypedumxpefrmrdyx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4532
  • C:\Users\Admin\AppData\Local\Temp\niatkleylfwznkrfcdje.exe
    C:\Users\Admin\AppData\Local\Temp\niatkleylfwznkrfcdje.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3584
  • C:\Windows\auldttleqjzbokqdzze.exe
    auldttleqjzbokqdzze.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4728
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\auldttleqjzbokqdzze.exe*."
      2⤵
      • Executes dropped EXE
      PID:4596
  • C:\Windows\niatkleylfwznkrfcdje.exe
    niatkleylfwznkrfcdje.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3704
  • C:\Windows\zqetgdsirhutdwzj.exe
    zqetgdsirhutdwzj.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1572
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\zqetgdsirhutdwzj.exe*."
      2⤵
      • Executes dropped EXE
      PID:2516
  • C:\Windows\auldttleqjzbokqdzze.exe
    auldttleqjzbokqdzze.exe
    1⤵
    • Executes dropped EXE
    PID:3224
  • C:\Windows\piypedumxpefrmrdyx.exe
    piypedumxpefrmrdyx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2836
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\piypedumxpefrmrdyx.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:472
  • C:\Users\Admin\AppData\Local\Temp\auldttleqjzbokqdzze.exe
    C:\Users\Admin\AppData\Local\Temp\auldttleqjzbokqdzze.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1948
  • C:\Windows\cyrldfzuidvzomujhjqmf.exe
    cyrldfzuidvzomujhjqmf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5080
  • C:\Windows\cyrldfzuidvzomujhjqmf.exe
    cyrldfzuidvzomujhjqmf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3488
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\cyrldfzuidvzomujhjqmf.exe*."
      2⤵
      • Executes dropped EXE
      PID:2668
  • C:\Windows\niatkleylfwznkrfcdje.exe
    niatkleylfwznkrfcdje.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3260
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\niatkleylfwznkrfcdje.exe*."
      2⤵
      • Executes dropped EXE
      PID:4000
  • C:\Users\Admin\AppData\Local\Temp\cyrldfzuidvzomujhjqmf.exe
    C:\Users\Admin\AppData\Local\Temp\cyrldfzuidvzomujhjqmf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4652
  • C:\Windows\gyndrpfwgxllwqufz.exe
    gyndrpfwgxllwqufz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:652
  • C:\Windows\zqetgdsirhutdwzj.exe
    zqetgdsirhutdwzj.exe
    1⤵
    • Executes dropped EXE
    PID:1620
  • C:\Users\Admin\AppData\Local\Temp\piypedumxpefrmrdyx.exe
    C:\Users\Admin\AppData\Local\Temp\piypedumxpefrmrdyx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:332
  • C:\Users\Admin\AppData\Local\Temp\zqetgdsirhutdwzj.exe
    C:\Users\Admin\AppData\Local\Temp\zqetgdsirhutdwzj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1008
  • C:\Windows\gyndrpfwgxllwqufz.exe
    gyndrpfwgxllwqufz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2896
    • C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
      "C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe" "c:\windows\gyndrpfwgxllwqufz.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:1760
  • C:\Users\Admin\AppData\Local\Temp\gyndrpfwgxllwqufz.exe
    C:\Users\Admin\AppData\Local\Temp\gyndrpfwgxllwqufz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4104

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

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        Downloads

        lfkywbphvpu.exe
        • Path C:\Users\Admin\AppData\Local\Temp\lfkywbphvpu.exe
        • Size 320KB
        • SHA256 b5643a7d0fe6085506e23f0f7a8ffdd41f0cb91aef9c4348dd724a5f743be5b9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nuydgt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nuydgt.exe
        • Size 704KB
        • SHA256 997c3b218148c4c8bb293edc1ec14822e7e52511984520f43269d643a15f61eb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        eebzvbzyqpltmoatvbmmj.djh
        • Path C:\Users\Admin\AppData\Local\eebzvbzyqpltmoatvbmmj.djh
        • Size 272B
        • SHA256 5f9454f33fb974ace6a9ddf3a45c61c1a70098935b8f77711dbe6b2a0778359f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        zksbizisvfmfjwtxkbxiqzgxgqtdkdhu.viz
        • Path C:\Users\Admin\AppData\Local\zksbizisvfmfjwtxkbxiqzgxgqtdkdhu.viz
        • Size 3KB
        • SHA256 3f30e3b9bb4bb0840dbe04704e2fec669fbf1d7d2c8cb2b6fdc5548b1e8bbd5c
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        piypedumxpefrmrdyx.exe
        • Path C:\Windows\SysWOW64\piypedumxpefrmrdyx.exe
        • Size 508KB
        • SHA256 4bef104c72830617853df2551a2ff6630dcfebde00899ed36bfdc7e4b9fee596
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download