Overview

overview

10

Static

static

3

tmp_u63bu5o.exe

windows10-ltsc_2021-x64

10

tmp_u63bu5o.exe

windows10-2004-x64

10

tmp_u63bu5o.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, 03:51

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General

  • Target
    tmp_u63bu5o.exe
  • Size 636KB
  • Sample260602-eewfjaew8n
  • SHA256 57c1e030441de1e230a0b4eccf9283b469684ebfa6835230435abfb26c94de74
  • 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 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 6 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
  • Launches sc.exe 1 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • 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\tmp_u63bu5o.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp_u63bu5o.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5988
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmp_u63bu5o.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:5980
      • C:\Users\Admin\AppData\Local\Temp\bejpzej.exe
        "C:\Users\Admin\AppData\Local\Temp\bejpzej.exe" "-C:\Users\Admin\AppData\Local\Temp\amapiwkcrhejxydt.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:3724
      • C:\Users\Admin\AppData\Local\Temp\bejpzej.exe
        "C:\Users\Admin\AppData\Local\Temp\bejpzej.exe" "-C:\Users\Admin\AppData\Local\Temp\amapiwkcrhejxydt.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:2984
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmp_u63bu5o.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:3264
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:6024
  • C:\Windows\bqhzvmdyqjjrimunghf.exe
    bqhzvmdyqjjrimunghf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1548
  • C:\Windows\oewpmewslfgphmvpjlka.exe
    oewpmewslfgphmvpjlka.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1504
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\oewpmewslfgphmvpjlka.exe*."
      2⤵
      • Executes dropped EXE
      PID:1860
  • C:\Windows\hujztixqgxvbqsypg.exe
    hujztixqgxvbqsypg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3420
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\hujztixqgxvbqsypg.exe*."
      2⤵
      • Executes dropped EXE
      PID:2568
  • C:\Users\Admin\AppData\Local\Temp\dunhfyroidfpioytorrib.exe
    C:\Users\Admin\AppData\Local\Temp\dunhfyroidfpioytorrib.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3236
  • C:\Windows\oewpmewslfgphmvpjlka.exe
    oewpmewslfgphmvpjlka.exe
    1⤵
    • Executes dropped EXE
    PID:1972
  • C:\Users\Admin\AppData\Local\Temp\hujztixqgxvbqsypg.exe
    C:\Users\Admin\AppData\Local\Temp\hujztixqgxvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5072
  • C:\Windows\amapiwkcrhejxydt.exe
    amapiwkcrhejxydt.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2056
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\amapiwkcrhejxydt.exe*."
      2⤵
      • Executes dropped EXE
      PID:1768
  • C:\Users\Admin\AppData\Local\Temp\amapiwkcrhejxydt.exe
    C:\Users\Admin\AppData\Local\Temp\amapiwkcrhejxydt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4412
  • C:\Windows\hujztixqgxvbqsypg.exe
    hujztixqgxvbqsypg.exe
    1⤵
    • Executes dropped EXE
    PID:5128
  • C:\Users\Admin\AppData\Local\Temp\bqhzvmdyqjjrimunghf.exe
    C:\Users\Admin\AppData\Local\Temp\bqhzvmdyqjjrimunghf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4376
  • C:\Windows\bqhzvmdyqjjrimunghf.exe
    bqhzvmdyqjjrimunghf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2608
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\bqhzvmdyqjjrimunghf.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:3652
  • C:\Windows\amapiwkcrhejxydt.exe
    amapiwkcrhejxydt.exe
    1⤵
    • Executes dropped EXE
    PID:5848
  • C:\Users\Admin\AppData\Local\Temp\oewpmewslfgphmvpjlka.exe
    C:\Users\Admin\AppData\Local\Temp\oewpmewslfgphmvpjlka.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3956
  • C:\Windows\dunhfyroidfpioytorrib.exe
    dunhfyroidfpioytorrib.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:632
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\dunhfyroidfpioytorrib.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:3200
  • C:\Windows\qeulgwmgxpovlovnff.exe
    qeulgwmgxpovlovnff.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:6088
  • C:\Windows\qeulgwmgxpovlovnff.exe
    qeulgwmgxpovlovnff.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5200
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\qeulgwmgxpovlovnff.exe*."
      2⤵
      • Executes dropped EXE
      PID:3828
  • C:\Windows\dunhfyroidfpioytorrib.exe
    dunhfyroidfpioytorrib.exe
    1⤵
    • Executes dropped EXE
    PID:2192
  • C:\Users\Admin\AppData\Local\Temp\qeulgwmgxpovlovnff.exe
    C:\Users\Admin\AppData\Local\Temp\qeulgwmgxpovlovnff.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2552
  • C:\Windows\system32\sc.exe
    C:\Windows\system32\sc.exe start wuauserv
    1⤵
    • Launches sc.exe
    PID:5020

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

        bejpzej.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bejpzej.exe
        • Size 720KB
        • SHA256 a6847fb705b01507b9d7e533aaa8685750b7d4ffee5e9efc1e6511e407042767
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vveaalwpffo.exe
        • Path C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
        • Size 320KB
        • SHA256 0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        eayxaywyxxetrcrrrzeayx.ywy
        • Path C:\Users\Admin\AppData\Local\eayxaywyxxetrcrrrzeayx.ywy
        • Size 272B
        • SHA256 050218be7ff52458e2248d6047927d4122d5176894dd5592e06061e49d977559
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        vclvjsboyjbbkggrcvlsblzireozrraww.slb
        • Path C:\Users\Admin\AppData\Local\vclvjsboyjbbkggrcvlsblzireozrraww.slb
        • Size 3KB
        • SHA256 dd6fb579ead9d33f7dee72b2ddc588b6fda771d3c5ece6fc1e0760449620ccff
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qeulgwmgxpovlovnff.exe
        • Path C:\Windows\SysWOW64\qeulgwmgxpovlovnff.exe
        • Size 636KB
        • SHA256 57c1e030441de1e230a0b4eccf9283b469684ebfa6835230435abfb26c94de74
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download