Overview

overview

10

Static

static

3

tmpsngxofs3.exe

windows10-ltsc_2021-x64

10

tmpsngxofs3.exe

windows10-2004-x64

10

tmpsngxofs3.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    147s
  • 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, 02:55

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General

  • Target
    tmpsngxofs3.exe
  • Size 1016KB
  • Sample260602-del2esct2v
  • SHA256 64c983843d97da8c80b6fb8af1e3cb42396844dd7e17861f6c132bf46fbe486b
  • 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 37 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 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 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpsngxofs3.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpsngxofs3.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3308
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\users\admin\appdata\local\temp\tmpsngxofs3.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:2716
      • C:\Users\Admin\AppData\Local\Temp\yfjxdgj.exe
        "C:\Users\Admin\AppData\Local\Temp\yfjxdgj.exe" "-C:\Users\Admin\AppData\Local\Temp\xnaxmykdssfjxfjo.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:3456
      • C:\Users\Admin\AppData\Local\Temp\yfjxdgj.exe
        "C:\Users\Admin\AppData\Local\Temp\yfjxdgj.exe" "-C:\Users\Admin\AppData\Local\Temp\xnaxmykdssfjxfjo.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:876
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\users\admin\appdata\local\temp\tmpsngxofs3.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:5088
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2424
  • C:\Windows\lfwxqgwtmqhphtbkcnhy.exe
    lfwxqgwtmqhphtbkcnhy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2176
  • C:\Windows\nfutkymhyapvlvbiyh.exe
    nfutkymhyapvlvbiyh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4736
  • C:\Windows\yrhhzodzrukritaizjc.exe
    yrhhzodzrukritaizjc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4352
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\yrhhzodzrukritaizjc.exe*."
      2⤵
      • Executes dropped EXE
      PID:1932
  • C:\Users\Admin\AppData\Local\Temp\lfwxqgwtmqhphtbkcnhy.exe
    C:\Users\Admin\AppData\Local\Temp\lfwxqgwtmqhphtbkcnhy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4756
  • C:\Users\Admin\AppData\Local\Temp\nfutkymhyapvlvbiyh.exe
    C:\Users\Admin\AppData\Local\Temp\nfutkymhyapvlvbiyh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3756
  • C:\Windows\yrhhzodzrukritaizjc.exe
    yrhhzodzrukritaizjc.exe
    1⤵
    • Executes dropped EXE
    PID:1348
  • C:\Windows\lfwxqgwtmqhphtbkcnhy.exe
    lfwxqgwtmqhphtbkcnhy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3820
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\lfwxqgwtmqhphtbkcnhy.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:2368
  • C:\Windows\evjhxkxrhiwbqzekz.exe
    evjhxkxrhiwbqzekz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3172
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\evjhxkxrhiwbqzekz.exe*."
      2⤵
      • Executes dropped EXE
      PID:2112
  • C:\Windows\xnaxmykdssfjxfjo.exe
    xnaxmykdssfjxfjo.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2636
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\xnaxmykdssfjxfjo.exe*."
      2⤵
      • Executes dropped EXE
      PID:1140
  • C:\Users\Admin\AppData\Local\Temp\avnpjarpjogpiveohtogi.exe
    C:\Users\Admin\AppData\Local\Temp\avnpjarpjogpiveohtogi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4500
  • C:\Windows\nfutkymhyapvlvbiyh.exe
    nfutkymhyapvlvbiyh.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2168
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\nfutkymhyapvlvbiyh.exe*."
      2⤵
      • Executes dropped EXE
      PID:1876
  • C:\Users\Admin\AppData\Local\Temp\evjhxkxrhiwbqzekz.exe
    C:\Users\Admin\AppData\Local\Temp\evjhxkxrhiwbqzekz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1760
  • C:\Windows\avnpjarpjogpiveohtogi.exe
    avnpjarpjogpiveohtogi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3968
  • C:\Users\Admin\AppData\Local\Temp\yrhhzodzrukritaizjc.exe
    C:\Users\Admin\AppData\Local\Temp\yrhhzodzrukritaizjc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3992
  • C:\Windows\xnaxmykdssfjxfjo.exe
    xnaxmykdssfjxfjo.exe
    1⤵
    • Executes dropped EXE
    PID:4880
  • C:\Windows\evjhxkxrhiwbqzekz.exe
    evjhxkxrhiwbqzekz.exe
    1⤵
    • Executes dropped EXE
    PID:3732
  • C:\Users\Admin\AppData\Local\Temp\xnaxmykdssfjxfjo.exe
    C:\Users\Admin\AppData\Local\Temp\xnaxmykdssfjxfjo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4976
  • C:\Windows\avnpjarpjogpiveohtogi.exe
    avnpjarpjogpiveohtogi.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3512
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\avnpjarpjogpiveohtogi.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:960

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

        Loading Replay Monitor...

        Downloads

        yfjxdgj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\yfjxdgj.exe
        • Size 708KB
        • SHA256 8bb972deab957292430d18f8b3671683bccd7a5f32b03c13f5566eaf22d20f10
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zhgpsrrajrq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
        • Size 320KB
        • SHA256 e593430a66a41409ff83bb482bfd1da85be0eb20a9f5fe50f34a4190b4feb0d4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        knnxzyxdfssjkfwopjmmwyxwc.rri
        • Path C:\Users\Admin\AppData\Local\knnxzyxdfssjkfwopjmmwyxwc.rri
        • Size 280B
        • SHA256 755cbaac6d6cca7f61cc5b4247d142adccbf0c105f7fc127583372e34525cab4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        pdojwgqhusdfrxzcothsnakulywhjvbdgsxl.reo
        • Path C:\Users\Admin\AppData\Local\pdojwgqhusdfrxzcothsnakulywhjvbdgsxl.reo
        • Size 4KB
        • SHA256 d81e81d47095c7babe96bf6d965017cd31158a3e35bf9717b2820c09b2a89f16
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nfutkymhyapvlvbiyh.exe
        • Path C:\Windows\SysWOW64\nfutkymhyapvlvbiyh.exe
        • Size 1016KB
        • SHA256 64c983843d97da8c80b6fb8af1e3cb42396844dd7e17861f6c132bf46fbe486b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download