Overview

overview

10

Static

static

3

tmpd82z4k4a.exe

windows10-ltsc_2021-x64

10

tmpd82z4k4a.exe

windows10-2004-x64

10

tmpd82z4k4a.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, 02:29

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General

  • Target
    tmpd82z4k4a.exe
  • Size 1016KB
  • Sample260602-cys4eaby8y
  • SHA256 6e34d3ea93f057a8e1e2d6ac7a99a55d84741f19ab4911d30948e6a347454b7c
  • 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 7 IoCs
    persistence
  • UAC bypass 3 TTPs 16 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 37 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 14 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 file in System32 directory 53 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 53 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpd82z4k4a.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpd82z4k4a.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:976
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\users\admin\appdata\local\temp\tmpd82z4k4a.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:1212
      • C:\Users\Admin\AppData\Local\Temp\lutdhl.exe
        "C:\Users\Admin\AppData\Local\Temp\lutdhl.exe" "-C:\Users\Admin\AppData\Local\Temp\xqzthvqjxjvkaoye.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:2492
      • C:\Users\Admin\AppData\Local\Temp\lutdhl.exe
        "C:\Users\Admin\AppData\Local\Temp\lutdhl.exe" "-C:\Users\Admin\AppData\Local\Temp\xqzthvqjxjvkaoye.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:4164
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\users\admin\appdata\local\temp\tmpd82z4k4a.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:1452
  • C:\Windows\aymlexxvofwqletemtoma.exe
    aymlexxvofwqletemtoma.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1300
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3076
  • C:\Windows\xqzthvqjxjvkaoye.exe
    xqzthvqjxjvkaoye.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3772
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\xqzthvqjxjvkaoye.exe*."
      2⤵
      • Executes dropped EXE
      PID:2868
  • C:\Users\Admin\AppData\Local\Temp\xqzthvqjxjvkaoye.exe
    C:\Users\Admin\AppData\Local\Temp\xqzthvqjxjvkaoye.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3888
  • C:\Windows\livtldczrhxqkcqahnhe.exe
    livtldczrhxqkcqahnhe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2316
  • C:\Users\Admin\AppData\Local\Temp\eyidshdxmzmctitae.exe
    C:\Users\Admin\AppData\Local\Temp\eyidshdxmzmctitae.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4676
  • C:\Windows\eyidshdxmzmctitae.exe
    eyidshdxmzmctitae.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1164
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\eyidshdxmzmctitae.exe*."
      2⤵
      • Executes dropped EXE
      PID:2808
  • C:\Windows\nitpfvsndrfwoeqydh.exe
    nitpfvsndrfwoeqydh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:648
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\nitpfvsndrfwoeqydh.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:5040
  • C:\Users\Admin\AppData\Local\Temp\yugduljfwlaslcpyejc.exe
    C:\Users\Admin\AppData\Local\Temp\yugduljfwlaslcpyejc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2416
  • C:\Windows\yugduljfwlaslcpyejc.exe
    yugduljfwlaslcpyejc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1432
  • C:\Windows\eyidshdxmzmctitae.exe
    eyidshdxmzmctitae.exe
    1⤵
    • Executes dropped EXE
    PID:1320
  • C:\Users\Admin\AppData\Local\Temp\aymlexxvofwqletemtoma.exe
    C:\Users\Admin\AppData\Local\Temp\aymlexxvofwqletemtoma.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2836
  • C:\Windows\aymlexxvofwqletemtoma.exe
    aymlexxvofwqletemtoma.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:688
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\aymlexxvofwqletemtoma.exe*."
      2⤵
      • Executes dropped EXE
      PID:1680
  • C:\Windows\yugduljfwlaslcpyejc.exe
    yugduljfwlaslcpyejc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4724
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\yugduljfwlaslcpyejc.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:4076
  • C:\Users\Admin\AppData\Local\Temp\nitpfvsndrfwoeqydh.exe
    C:\Users\Admin\AppData\Local\Temp\nitpfvsndrfwoeqydh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3092
  • C:\Users\Admin\AppData\Local\Temp\livtldczrhxqkcqahnhe.exe
    C:\Users\Admin\AppData\Local\Temp\livtldczrhxqkcqahnhe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1332
  • C:\Windows\livtldczrhxqkcqahnhe.exe
    livtldczrhxqkcqahnhe.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\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\livtldczrhxqkcqahnhe.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:2868
  • C:\Windows\nitpfvsndrfwoeqydh.exe
    nitpfvsndrfwoeqydh.exe
    1⤵
    • Executes dropped EXE
    PID:4592
  • C:\Windows\xqzthvqjxjvkaoye.exe
    xqzthvqjxjvkaoye.exe
    1⤵
    • Executes dropped EXE
    PID:452

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

        bexbzxcfdzvuusmcpbbexb.xcf
        • Path C:\Program Files (x86)\bexbzxcfdzvuusmcpbbexb.xcf
        • Size 280B
        • SHA256 4dc8493fde00679b2632f6fdbf41d19d21b37a89d30281fdc5f9506e1d714e9b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        lutdhl.exe
        • Path C:\Users\Admin\AppData\Local\Temp\lutdhl.exe
        • Size 708KB
        • SHA256 35eafb3d59a5cb5569dfad66c3be41fe5e34431944d1dec428e58d7a3859e77c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mwhqvwurwgr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
        • Size 320KB
        • SHA256 23747979713aa1a7bd3a5e0d606e44a3604123833eabfba5c3eea0078724b179
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bexbzxcfdzvuusmcpbbexb.xcf
        • Path C:\Users\Admin\AppData\Local\bexbzxcfdzvuusmcpbbexb.xcf
        • Size 280B
        • SHA256 f59cb54431e4f2874b31c09cfdf31d2babc92ea610ea68ba821ee24f2c55fd05
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bexbzxcfdzvuusmcpbbexb.xcf
        • Path C:\Users\Admin\AppData\Local\bexbzxcfdzvuusmcpbbexb.xcf
        • Size 280B
        • SHA256 b43bf22d6d8dc57c89d3b8dde1d59f0d1098408162aaedc7cee2d8029c5e0e12
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sgkzirhvelscnwbcaxiwapyhxlubisdmr.qny
        • Path C:\Users\Admin\AppData\Local\sgkzirhvelscnwbcaxiwapyhxlubisdmr.qny
        • Size 4KB
        • SHA256 a742c113ae624297dc816243c38edee05b16f2909c37abd86a3c74df02da523a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nitpfvsndrfwoeqydh.exe
        • Path C:\Windows\SysWOW64\nitpfvsndrfwoeqydh.exe
        • Size 1016KB
        • SHA256 6e34d3ea93f057a8e1e2d6ac7a99a55d84741f19ab4911d30948e6a347454b7c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download