Overview

overview

10

Static

static

3

tmpia6aetn4.exe

windows10-ltsc_2021-x64

10

tmpia6aetn4.exe

windows10-2004-x64

10

tmpia6aetn4.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    22/05/2026, 14:37

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General

  • Target
    tmpia6aetn4.exe
  • Size 656KB
  • Sample260522-ry6f3ad18q
  • SHA256 981060a1e46587bf0a8a8a74b64ab520240c502326cfa347a72b10f73c59a1c8
  • 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 35 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 7 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 7 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpia6aetn4.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpia6aetn4.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4008
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\users\admin\appdata\local\temp\tmpia6aetn4.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:3020
      • C:\Users\Admin\AppData\Local\Temp\hoxckq.exe
        "C:\Users\Admin\AppData\Local\Temp\hoxckq.exe" "-C:\Users\Admin\AppData\Local\Temp\tkdskaojuihkdiox.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 Location Discovery: System Language Discovery
        • System policy modification
        PID:3048
      • C:\Users\Admin\AppData\Local\Temp\hoxckq.exe
        "C:\Users\Admin\AppData\Local\Temp\hoxckq.exe" "-C:\Users\Admin\AppData\Local\Temp\tkdskaojuihkdiox.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:3192
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\users\admin\appdata\local\temp\tmpia6aetn4.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:4848
  • C:\Windows\tkdskaojuihkdiox.exe
    tkdskaojuihkdiox.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4412
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2924
  • C:\Windows\uokcxqhftkmsowfrnfz.exe
    uokcxqhftkmsowfrnfz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3556
  • C:\Users\Admin\AppData\Local\Temp\jcxoiaqnaqrwrygrmd.exe
    C:\Users\Admin\AppData\Local\Temp\jcxoiaqnaqrwrygrmd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3784
  • C:\Windows\wsqkhcvvleiqoyjxvpljd.exe
    wsqkhcvvleiqoyjxvpljd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1452
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\wsqkhcvvleiqoyjxvpljd.exe*."
      2⤵
      • Executes dropped EXE
      PID:3644
  • C:\Windows\tkdskaojuihkdiox.exe
    tkdskaojuihkdiox.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:380
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\tkdskaojuihkdiox.exe*."
      2⤵
      • Executes dropped EXE
      PID:2908
  • C:\Users\Admin\AppData\Local\Temp\wsqkhcvvleiqoyjxvpljd.exe
    C:\Users\Admin\AppData\Local\Temp\wsqkhcvvleiqoyjxvpljd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1336
  • C:\Windows\jcxoiaqnaqrwrygrmd.exe
    jcxoiaqnaqrwrygrmd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4452
  • C:\Windows\asmcvmbxjyycwcjtn.exe
    asmcvmbxjyycwcjtn.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\asmcvmbxjyycwcjtn.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:2024
  • C:\Windows\asmcvmbxjyycwcjtn.exe
    asmcvmbxjyycwcjtn.exe
    1⤵
    • Executes dropped EXE
    PID:3344
  • C:\Users\Admin\AppData\Local\Temp\uokcxqhftkmsowfrnfz.exe
    C:\Users\Admin\AppData\Local\Temp\uokcxqhftkmsowfrnfz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4952
  • C:\Windows\wsqkhcvvleiqoyjxvpljd.exe
    wsqkhcvvleiqoyjxvpljd.exe
    1⤵
    • Executes dropped EXE
    PID:1476
  • C:\Windows\jcxoiaqnaqrwrygrmd.exe
    jcxoiaqnaqrwrygrmd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4508
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\jcxoiaqnaqrwrygrmd.exe*."
      2⤵
      • Executes dropped EXE
      PID:3780
  • C:\Users\Admin\AppData\Local\Temp\hczsoiazogjqnwgtqjeb.exe
    C:\Users\Admin\AppData\Local\Temp\hczsoiazogjqnwgtqjeb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2360
  • C:\Windows\System32\Conhost.exe
    \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
    1⤵
      PID:2908
    • C:\Users\Admin\AppData\Local\Temp\tkdskaojuihkdiox.exe
      C:\Users\Admin\AppData\Local\Temp\tkdskaojuihkdiox.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2924
    • C:\Users\Admin\AppData\Local\Temp\asmcvmbxjyycwcjtn.exe
      C:\Users\Admin\AppData\Local\Temp\asmcvmbxjyycwcjtn.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3284
    • C:\Windows\hczsoiazogjqnwgtqjeb.exe
      hczsoiazogjqnwgtqjeb.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4896
    • C:\Windows\hczsoiazogjqnwgtqjeb.exe
      hczsoiazogjqnwgtqjeb.exe .
      1⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3160
      • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
        "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\hczsoiazogjqnwgtqjeb.exe*."
        2⤵
        • Executes dropped EXE
        PID:2504
    • C:\Windows\uokcxqhftkmsowfrnfz.exe
      uokcxqhftkmsowfrnfz.exe .
      1⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
        "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\uokcxqhftkmsowfrnfz.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:5076

    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

          Loading Replay Monitor...

          Downloads

          hoxckq.exe
          • Path C:\Users\Admin\AppData\Local\Temp\hoxckq.exe
          • Size 720KB
          • SHA256 b4ba41ae784aed37de985248b99ceb3c31003067a3b56606c9c853c0397ad1ea
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

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

          lynymyizgqlkzachwhujuiuevcmhgvwyds.qfq
          • Path C:\Users\Admin\AppData\Local\lynymyizgqlkzachwhujuiuevcmhgvwyds.qfq
          • Size 3KB
          • SHA256 87352c88dca6c88728701d5807326fe15d51f416f8d1e9837bbd0e0772a40496
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          yaeehihnjisgkarlpprvvyz.eaz
          • Path C:\Users\Admin\AppData\Local\yaeehihnjisgkarlpprvvyz.eaz
          • Size 272B
          • SHA256 bfc648d03ca35712e5bcffdf27cbffaee275dd2ba6191d8b722f5f13409589a2
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          jcxoiaqnaqrwrygrmd.exe
          • Path C:\Windows\SysWOW64\jcxoiaqnaqrwrygrmd.exe
          • Size 656KB
          • SHA256 981060a1e46587bf0a8a8a74b64ab520240c502326cfa347a72b10f73c59a1c8
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download