Overview

overview

10

Static

static

3

tmp_4np4l0y.exe

windows10-ltsc_2021-x64

10

tmp_4np4l0y.exe

windows10-2004-x64

10

tmp_4np4l0y.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, 03:45

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General

  • Target
    tmp_4np4l0y.exe
  • Size 472KB
  • Sample260602-ea546sew2r
  • SHA256 d87db55477a0f36b5c94e16d8f60ac79745be3d58cc77db6be405e8e4afb911c
  • 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
  • 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 9 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 64 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 55 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\tmp_4np4l0y.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp_4np4l0y.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4624
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\users\admin\appdata\local\temp\tmp_4np4l0y.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:3600
      • C:\Users\Admin\AppData\Local\Temp\ahnpchs.exe
        "C:\Users\Admin\AppData\Local\Temp\ahnpchs.exe" "-c:\users\admin\appdata\local\temp\tmp_4np4l0y.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:2660
      • C:\Users\Admin\AppData\Local\Temp\ahnpchs.exe
        "C:\Users\Admin\AppData\Local\Temp\ahnpchs.exe" "-c:\users\admin\appdata\local\temp\tmp_4np4l0y.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:2708
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\users\admin\appdata\local\temp\tmp_4np4l0y.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:2400
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3508
  • C:\Windows\nhapphfxnfburddrnsjd.exe
    nhapphfxnfburddrnsjd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3344
  • C:\Windows\atlzypmdsjewsdcpkoe.exe
    atlzypmdsjewsdcpkoe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4272
  • C:\Windows\gxnzwlgvixqgajgrk.exe
    gxnzwlgvixqgajgrk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1272
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\windows\gxnzwlgvixqgajgrk.exe*."
      2⤵
      • Executes dropped EXE
      PID:4828
  • C:\Users\Admin\AppData\Local\Temp\atlzypmdsjewsdcpkoe.exe
    C:\Users\Admin\AppData\Local\Temp\atlzypmdsjewsdcpkoe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3432
  • C:\Windows\atlzypmdsjewsdcpkoe.exe
    atlzypmdsjewsdcpkoe.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1860
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\windows\atlzypmdsjewsdcpkoe.exe*."
      2⤵
      • Executes dropped EXE
      PID:3892
  • C:\Windows\cxrhibatkdausfgvsyqlf.exe
    cxrhibatkdausfgvsyqlf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4940
  • C:\Users\Admin\AppData\Local\Temp\zpeplzththzohplv.exe
    C:\Users\Admin\AppData\Local\Temp\zpeplzththzohplv.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3188
  • C:\Windows\zpeplzththzohplv.exe
    zpeplzththzohplv.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4524
  • C:\Windows\cxrhibatkdausfgvsyqlf.exe
    cxrhibatkdausfgvsyqlf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4580
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\windows\cxrhibatkdausfgvsyqlf.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:1984
  • C:\Users\Admin\AppData\Local\Temp\nhapphfxnfburddrnsjd.exe
    C:\Users\Admin\AppData\Local\Temp\nhapphfxnfburddrnsjd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4984
  • C:\Users\Admin\AppData\Local\Temp\phyljzvlzpjavfdpjm.exe
    C:\Users\Admin\AppData\Local\Temp\phyljzvlzpjavfdpjm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:116
  • C:\Windows\nhapphfxnfburddrnsjd.exe
    nhapphfxnfburddrnsjd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3536
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\windows\nhapphfxnfburddrnsjd.exe*."
      2⤵
      • Executes dropped EXE
      PID:1688
  • C:\Windows\phyljzvlzpjavfdpjm.exe
    phyljzvlzpjavfdpjm.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4488
  • C:\Users\Admin\AppData\Local\Temp\cxrhibatkdausfgvsyqlf.exe
    C:\Users\Admin\AppData\Local\Temp\cxrhibatkdausfgvsyqlf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2508
  • C:\Windows\gxnzwlgvixqgajgrk.exe
    gxnzwlgvixqgajgrk.exe
    1⤵
    • Executes dropped EXE
    PID:4852
  • C:\Windows\zpeplzththzohplv.exe
    zpeplzththzohplv.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2144
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\windows\zpeplzththzohplv.exe*."
      2⤵
      • Executes dropped EXE
      PID:3024
  • C:\Windows\phyljzvlzpjavfdpjm.exe
    phyljzvlzpjavfdpjm.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4212
    • C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
      "C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe" "c:\windows\phyljzvlzpjavfdpjm.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:3552
  • C:\Users\Admin\AppData\Local\Temp\gxnzwlgvixqgajgrk.exe
    C:\Users\Admin\AppData\Local\Temp\gxnzwlgvixqgajgrk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4256

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

        ddcxdbfdzxzybtztvgddcx.bfd
        • Path C:\Program Files (x86)\ddcxdbfdzxzybtztvgddcx.bfd
        • Size 120B
        • SHA256 02c7076a042f02b83f18edf18d2b98e394070e4415650e73c005b299f1aed932
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ddcxdbfdzxzybtztvgddcx.bfd
        • Path C:\Program Files (x86)\ddcxdbfdzxzybtztvgddcx.bfd
        • Size 120B
        • SHA256 2dc500331d033506b46bcd97f22ca01e7c63f185e074ae7070a7d0425e12a3eb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ddcxdbfdzxzybtztvgddcx.bfd
        • Path C:\Program Files (x86)\ddcxdbfdzxzybtztvgddcx.bfd
        • Size 120B
        • SHA256 6c81eacffb2b91c6e50c317d5b454d0eaead16e9c15f11a7f7e11e0febeda870
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ddcxdbfdzxzybtztvgddcx.bfd
        • Path C:\Program Files (x86)\ddcxdbfdzxzybtztvgddcx.bfd
        • Size 120B
        • SHA256 d9278a9af6500cad3b336b5767c288a360c5999d68a8feb08f399ec2e3bdb2fd
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ddcxdbfdzxzybtztvgddcx.bfd
        • Path C:\Program Files (x86)\ddcxdbfdzxzybtztvgddcx.bfd
        • Size 120B
        • SHA256 001002b39526dd56749fec360b8d52ce71612aa072398f482c2ca2d639522712
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ahnpchs.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ahnpchs.exe
        • Size 680KB
        • SHA256 e82db0eb537f3f8d0bff2d2241d0ec9b893e3de466c62a9534eefcb3f7ddd963
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        qaorinawaky.exe
        • Path C:\Users\Admin\AppData\Local\Temp\qaorinawaky.exe
        • Size 308KB
        • SHA256 6fff20aabe8265b6e811c9dbcb987f9c15cf07d1d8b80ced7b287d96900f5c62
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ddcxdbfdzxzybtztvgddcx.bfd
        • Path C:\Users\Admin\AppData\Local\ddcxdbfdzxzybtztvgddcx.bfd
        • Size 120B
        • SHA256 98aa9c34f3b2ab9309612f55973b3df2eff969202cc4b6907f803096dc6dba55
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ufpvmvktajwguxotgckvflclajqzmwkne.wsa
        • Path C:\Users\Admin\AppData\Local\ufpvmvktajwguxotgckvflclajqzmwkne.wsa
        • Size 3KB
        • SHA256 a56e264194a7df55a864a2934f88c865663e39331e266b9067ba02544958bb3d
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        phyljzvlzpjavfdpjm.exe
        • Path C:\Windows\SysWOW64\phyljzvlzpjavfdpjm.exe
        • Size 472KB
        • SHA256 d87db55477a0f36b5c94e16d8f60ac79745be3d58cc77db6be405e8e4afb911c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        gpxbqxkrw.bat
        • Path C:\gpxbqxkrw.bat
        • Size 508KB
        • SHA256 4c4eb76a1a2fcbc9697c863b556b86a8f79142c7909cf15913bdca8239e4fef2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download