Overview

overview

10

Static

static

3

tmpk44cj9rt.exe

windows10-ltsc_2021-x64

10

tmpk44cj9rt.exe

windows10-2004-x64

10

tmpk44cj9rt.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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, 02:40

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General

  • Target
    tmpk44cj9rt.exe
  • Size 556KB
  • Sample260602-c5837sdv2m
  • SHA256 91fc34dc596f132370482a841cafd27c67701eccd61b933e95f5d9c4b794d8a6
  • 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 34 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 8 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 17 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\tmpk44cj9rt.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpk44cj9rt.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4948
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmpk44cj9rt.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:5852
      • C:\Users\Admin\AppData\Local\Temp\bemqvdq.exe
        "C:\Users\Admin\AppData\Local\Temp\bemqvdq.exe" "-C:\Users\Admin\AppData\Local\Temp\amdqevrcyiejxydt.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:1824
      • C:\Users\Admin\AppData\Local\Temp\bemqvdq.exe
        "C:\Users\Admin\AppData\Local\Temp\bemqvdq.exe" "-C:\Users\Admin\AppData\Local\Temp\amdqevrcyiejxydt.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:5212
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmpk44cj9rt.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:3860
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5792
  • C:\Windows\duqibxyopefpioytorrie.exe
    duqibxyopefpioytorrie.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1652
  • C:\Windows\humapheqnyvbqsypg.exe
    humapheqnyvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:420
  • C:\Windows\duqibxyopefpioytorrie.exe
    duqibxyopefpioytorrie.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2424
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\duqibxyopefpioytorrie.exe*."
      2⤵
      • Executes dropped EXE
      PID:456
  • C:\Users\Admin\AppData\Local\Temp\oezqiddssggphmvpjlka.exe
    C:\Users\Admin\AppData\Local\Temp\oezqiddssggphmvpjlka.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1540
  • C:\Windows\bqkarlkyxkjrimunghf.exe
    bqkarlkyxkjrimunghf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3516
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\bqkarlkyxkjrimunghf.exe*."
      2⤵
      • Executes dropped EXE
      PID:3800
  • C:\Users\Admin\AppData\Local\Temp\qexmcvtgeqovlovnff.exe
    C:\Users\Admin\AppData\Local\Temp\qexmcvtgeqovlovnff.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1772
  • C:\Windows\bqkarlkyxkjrimunghf.exe
    bqkarlkyxkjrimunghf.exe
    1⤵
    • Executes dropped EXE
    PID:1456
  • C:\Windows\humapheqnyvbqsypg.exe
    humapheqnyvbqsypg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5516
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\humapheqnyvbqsypg.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:2432
  • C:\Users\Admin\AppData\Local\Temp\amdqevrcyiejxydt.exe
    C:\Users\Admin\AppData\Local\Temp\amdqevrcyiejxydt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4696
  • C:\Windows\oezqiddssggphmvpjlka.exe
    oezqiddssggphmvpjlka.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2272
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\oezqiddssggphmvpjlka.exe*."
      2⤵
      • Executes dropped EXE
      PID:5984
  • C:\Windows\oezqiddssggphmvpjlka.exe
    oezqiddssggphmvpjlka.exe
    1⤵
    • Executes dropped EXE
    PID:2808
  • C:\Windows\qexmcvtgeqovlovnff.exe
    qexmcvtgeqovlovnff.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3768
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\qexmcvtgeqovlovnff.exe*."
      2⤵
      • Executes dropped EXE
      PID:3324
  • C:\Windows\amdqevrcyiejxydt.exe
    amdqevrcyiejxydt.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4920
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\amdqevrcyiejxydt.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:224
  • C:\Users\Admin\AppData\Local\Temp\duqibxyopefpioytorrie.exe
    C:\Users\Admin\AppData\Local\Temp\duqibxyopefpioytorrie.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:572
  • C:\Windows\qexmcvtgeqovlovnff.exe
    qexmcvtgeqovlovnff.exe
    1⤵
    • Executes dropped EXE
    PID:4784
  • C:\Users\Admin\AppData\Local\Temp\humapheqnyvbqsypg.exe
    C:\Users\Admin\AppData\Local\Temp\humapheqnyvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5348
  • C:\Users\Admin\AppData\Local\Temp\bqkarlkyxkjrimunghf.exe
    C:\Users\Admin\AppData\Local\Temp\bqkarlkyxkjrimunghf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5868
  • C:\Windows\amdqevrcyiejxydt.exe
    amdqevrcyiejxydt.exe
    1⤵
    • Executes dropped EXE
    PID:3364

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

        dekmpvggrqbvyoinsfpqwybhssd.nhk
        • Path C:\Program Files (x86)\dekmpvggrqbvyoinsfpqwybhssd.nhk
        • Size 280B
        • SHA256 a65a0639c421530272c83f3ea1220ed6b1fdb8df24830f686cda9f6718ce7c0e
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bemqvdq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bemqvdq.exe
        • Size 720KB
        • SHA256 0d288a820c0b3eb3f8bd6a04aaeed5c4f773ffd1e74217ffbf7106ad9cf4ac6e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vveaalwpffo.exe
        • Path C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
        • Size 320KB
        • SHA256 f6e99572cbaf615b47c0880c5f1b85c049b46fc1249b087c6d4c73bc895a5ab8
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        amdqevrcyiejxydtjhcofsgxteakglzafvljeq.uiz
        • Path C:\Users\Admin\AppData\Local\amdqevrcyiejxydtjhcofsgxteakglzafvljeq.uiz
        • Size 4KB
        • SHA256 9732bb0da1a8728e9387ff26b4016a1fb80f07cd906dfd28358502a7296e656c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dekmpvggrqbvyoinsfpqwybhssd.nhk
        • Path C:\Users\Admin\AppData\Local\dekmpvggrqbvyoinsfpqwybhssd.nhk
        • Size 280B
        • SHA256 fe0b1be09b072c6769ca72ca1e7b4274c9856492bff8660dd9085f38b4cb5ae4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qexmcvtgeqovlovnff.exe
        • Path C:\Windows\SysWOW64\qexmcvtgeqovlovnff.exe
        • Size 556KB
        • SHA256 91fc34dc596f132370482a841cafd27c67701eccd61b933e95f5d9c4b794d8a6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download