Overview

overview

10

Static

static

3

tmpzpnxyjp2.exe

windows10-2004-x64

10

tmpzpnxyjp2.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    22/05/2026, 14:04

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General

  • Target
    tmpzpnxyjp2.exe
  • Size 1016KB
  • Sample260522-rc9llads4p
  • SHA256 7461067b1c6d5c8b94f2ab1a7e80082193873eb5b75e8f20d301a3942b399e73
  • 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
  • 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 4 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 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 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpzpnxyjp2.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpzpnxyjp2.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4876
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmpzpnxyjp2.exe*"
      2⤵
      • 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
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:3064
      • C:\Users\Admin\AppData\Local\Temp\zhint.exe
        "C:\Users\Admin\AppData\Local\Temp\zhint.exe" "-C:\Users\Admin\AppData\Local\Temp\wpbriymhrlyvumgd.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:4196
      • C:\Users\Admin\AppData\Local\Temp\zhint.exe
        "C:\Users\Admin\AppData\Local\Temp\zhint.exe" "-C:\Users\Admin\AppData\Local\Temp\wpbriymhrlyvumgd.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:1316
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmpzpnxyjp2.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:2952
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5504
  • C:\Windows\mhvngyolxtihicyxjg.exe
    mhvngyolxtihicyxjg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5200
  • C:\Windows\mhvngyolxtihicyxjg.exe
    mhvngyolxtihicyxjg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3636
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\mhvngyolxtihicyxjg.exe*."
      2⤵
      • Executes dropped EXE
      PID:3296
  • C:\Windows\xtibvofdqnddfaxxkie.exe
    xtibvofdqnddfaxxkie.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2112
  • C:\Users\Admin\AppData\Local\Temp\wpbriymhrlyvumgd.exe
    C:\Users\Admin\AppData\Local\Temp\wpbriymhrlyvumgd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5600
  • C:\Users\Admin\AppData\Local\Temp\dxkbtkzvgbpnngbzk.exe
    C:\Users\Admin\AppData\Local\Temp\dxkbtkzvgbpnngbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5456
  • C:\Windows\wpbriymhrlyvumgd.exe
    wpbriymhrlyvumgd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2132
  • C:\Windows\zxojfattihzbfcbdssqhc.exe
    zxojfattihzbfcbdssqhc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1996
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\zxojfattihzbfcbdssqhc.exe*."
      2⤵
      • Executes dropped EXE
      PID:4532
  • C:\Windows\wpbriymhrlyvumgd.exe
    wpbriymhrlyvumgd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5536
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\wpbriymhrlyvumgd.exe*."
      2⤵
      • Executes dropped EXE
      PID:2028
  • C:\Windows\xtibvofdqnddfaxxkie.exe
    xtibvofdqnddfaxxkie.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:240
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\xtibvofdqnddfaxxkie.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:3384
  • C:\Users\Admin\AppData\Local\Temp\xtibvofdqnddfaxxkie.exe
    C:\Users\Admin\AppData\Local\Temp\xtibvofdqnddfaxxkie.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:6000
  • C:\Users\Admin\AppData\Local\Temp\zxojfattihzbfcbdssqhc.exe
    C:\Users\Admin\AppData\Local\Temp\zxojfattihzbfcbdssqhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4676
  • C:\Users\Admin\AppData\Local\Temp\mhvngyolxtihicyxjg.exe
    C:\Users\Admin\AppData\Local\Temp\mhvngyolxtihicyxjg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5132
  • C:\Users\Admin\AppData\Local\Temp\khxrmgyxljabeayznmjz.exe
    C:\Users\Admin\AppData\Local\Temp\khxrmgyxljabeayznmjz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4400
  • C:\Windows\dxkbtkzvgbpnngbzk.exe
    dxkbtkzvgbpnngbzk.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4984
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\dxkbtkzvgbpnngbzk.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:6112
  • C:\Windows\dxkbtkzvgbpnngbzk.exe
    dxkbtkzvgbpnngbzk.exe
    1⤵
    • Executes dropped EXE
    PID:5520
  • C:\Windows\khxrmgyxljabeayznmjz.exe
    khxrmgyxljabeayznmjz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5384
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\khxrmgyxljabeayznmjz.exe*."
      2⤵
      • Executes dropped EXE
      PID:3592
  • C:\Windows\zxojfattihzbfcbdssqhc.exe
    zxojfattihzbfcbdssqhc.exe
    1⤵
    • Executes dropped EXE
    PID:5544
  • C:\Windows\khxrmgyxljabeayznmjz.exe
    khxrmgyxljabeayznmjz.exe
    1⤵
    • Executes dropped EXE
    PID:2744

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

        System Information Discovery

        2
        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

        adzzaaydxbyfoqubvadzza.ydx
        • Path C:\Program Files (x86)\adzzaaydxbyfoqubvadzza.ydx
        • Size 280B
        • SHA256 619a0e8673d4ddf9c70a86f1c64758500a783f2290d46f432e8d65da44727a17
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        adzzaaydxbyfoqubvadzza.ydx
        • Path C:\Program Files (x86)\adzzaaydxbyfoqubvadzza.ydx
        • Size 280B
        • SHA256 b9e8eff3d357934e6f25a012639f8b9d3d6f75b31a9fb613091800e12801070a
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        adzzaaydxbyfoqubvadzza.ydx
        • Path C:\Program Files (x86)\adzzaaydxbyfoqubvadzza.ydx
        • Size 280B
        • SHA256 aa147a535bafb4bb9d87aa534f223f9d1f6ad9924d21e26b21316fa1dec0df98
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        adzzaaydxbyfoqubvadzza.ydx
        • Path C:\Program Files (x86)\adzzaaydxbyfoqubvadzza.ydx
        • Size 280B
        • SHA256 08055c602613bdbb0dad6cbaa318ff07ce12659742726ab2047bd225469cda59
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        sasmzoglckc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
        • Size 320KB
        • SHA256 e42fb5338af0607b1834ba6a6dd355614ff41ce5687ffe5b5690ee8d7a027cac
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zhint.exe
        • Path C:\Users\Admin\AppData\Local\Temp\zhint.exe
        • Size 728KB
        • SHA256 5d2d8d11ccaba93adb07a758c194854a7bcdf9d6a67852af51f4892a626b4e98
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        adzzaaydxbyfoqubvadzza.ydx
        • Path C:\Users\Admin\AppData\Local\adzzaaydxbyfoqubvadzza.ydx
        • Size 280B
        • SHA256 73d5b98c836150a92dd57cbdceb0bf1063e29792d358ed2950ee5f41810c3d61
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        adzzaaydxbyfoqubvadzza.ydx
        • Path C:\Users\Admin\AppData\Local\adzzaaydxbyfoqubvadzza.ydx
        • Size 280B
        • SHA256 2e325f818daedd7a433eb7aa294474c306aa044866a8380c98efcc593e3653b9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rfmxjudtynvnhujbgwkrcoziydsasmzog.bpw
        • Path C:\Users\Admin\AppData\Local\rfmxjudtynvnhujbgwkrcoziydsasmzog.bpw
        • Size 4KB
        • SHA256 3a41cab25fe173dcd0b577cd691d89819d832183312ce6563a81628a457fd3fd
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mhvngyolxtihicyxjg.exe
        • Path C:\Windows\SysWOW64\mhvngyolxtihicyxjg.exe
        • Size 1016KB
        • SHA256 7461067b1c6d5c8b94f2ab1a7e80082193873eb5b75e8f20d301a3942b399e73
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download