Overview

overview

10

Static

static

3

tmpkg660511.exe

windows10-ltsc_2021-x64

10

tmpkg660511.exe

windows10-2004-x64

10

tmpkg660511.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • 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, 03:37

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General

  • Target
    tmpkg660511.exe
  • Size 524KB
  • Sample260602-d61c5ac16x
  • SHA256 ce16cfb716ea2a3ebb272428883f5b7375f2b38c5eeff3c4e455baa9a9fb0168
  • 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 33 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 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\tmpkg660511.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpkg660511.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5096
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmpkg660511.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:4336
      • C:\Users\Admin\AppData\Local\Temp\nsvzgk.exe
        "C:\Users\Admin\AppData\Local\Temp\nsvzgk.exe" "-C:\Users\Admin\AppData\Local\Temp\zobpgutcxjmitmxh.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:2384
      • C:\Users\Admin\AppData\Local\Temp\nsvzgk.exe
        "C:\Users\Admin\AppData\Local\Temp\nsvzgk.exe" "-C:\Users\Admin\AppData\Local\Temp\zobpgutcxjmitmxh.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:3780
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\users\admin\appdata\local\temp\tmpkg660511.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:4580
  • C:\Windows\zobpgutcxjmitmxh.exe
    zobpgutcxjmitmxh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3192
  • C:\Windows\gwkzrggqmzdamgsdr.exe
    gwkzrggqmzdamgsdr.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:204
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:208
  • C:\Windows\zobpgutcxjmitmxh.exe
    zobpgutcxjmitmxh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4692
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\zobpgutcxjmitmxh.exe*."
      2⤵
      • Executes dropped EXE
      PID:3020
  • C:\Windows\pgvleuvgdrwuhcpbqx.exe
    pgvleuvgdrwuhcpbqx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2800
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\pgvleuvgdrwuhcpbqx.exe*."
      2⤵
      • Executes dropped EXE
      PID:1164
  • C:\Users\Admin\AppData\Local\Temp\gwkzrggqmzdamgsdr.exe
    C:\Users\Admin\AppData\Local\Temp\gwkzrggqmzdamgsdr.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3404
  • C:\Windows\asiztkmywlrqeaobrze.exe
    asiztkmywlrqeaobrze.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:940
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\asiztkmywlrqeaobrze.exe*."
      2⤵
      • Executes dropped EXE
      PID:1840
  • C:\Windows\cwohdwaoofnoecshzjqkc.exe
    cwohdwaoofnoecshzjqkc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2952
    • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
      "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\cwohdwaoofnoecshzjqkc.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:988
  • C:\Windows\ngxpkcfsrhoodapdudjc.exe
    ngxpkcfsrhoodapdudjc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4560
  • C:\Users\Admin\AppData\Local\Temp\cwohdwaoofnoecshzjqkc.exe
    C:\Users\Admin\AppData\Local\Temp\cwohdwaoofnoecshzjqkc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3868
  • C:\Windows\System32\Conhost.exe
    \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
    1⤵
      PID:3020
    • C:\Windows\ngxpkcfsrhoodapdudjc.exe
      ngxpkcfsrhoodapdudjc.exe .
      1⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3060
      • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
        "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\ngxpkcfsrhoodapdudjc.exe*."
        2⤵
        • Executes dropped EXE
        PID:1796
    • C:\Users\Admin\AppData\Local\Temp\pgvleuvgdrwuhcpbqx.exe
      C:\Users\Admin\AppData\Local\Temp\pgvleuvgdrwuhcpbqx.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4156
    • C:\Users\Admin\AppData\Local\Temp\asiztkmywlrqeaobrze.exe
      C:\Users\Admin\AppData\Local\Temp\asiztkmywlrqeaobrze.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:2664
    • C:\Windows\asiztkmywlrqeaobrze.exe
      asiztkmywlrqeaobrze.exe
      1⤵
      • Executes dropped EXE
      PID:888
    • C:\Windows\gwkzrggqmzdamgsdr.exe
      gwkzrggqmzdamgsdr.exe .
      1⤵
      • Checks computer location settings
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4944
      • C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
        "C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe" "c:\windows\gwkzrggqmzdamgsdr.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:2016
    • C:\Windows\pgvleuvgdrwuhcpbqx.exe
      pgvleuvgdrwuhcpbqx.exe
      1⤵
      • Executes dropped EXE
      PID:2764
    • C:\Users\Admin\AppData\Local\Temp\zobpgutcxjmitmxh.exe
      C:\Users\Admin\AppData\Local\Temp\zobpgutcxjmitmxh.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:1992
    • C:\Users\Admin\AppData\Local\Temp\ngxpkcfsrhoodapdudjc.exe
      C:\Users\Admin\AppData\Local\Temp\ngxpkcfsrhoodapdudjc.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3684
    • C:\Windows\cwohdwaoofnoecshzjqkc.exe
      cwohdwaoofnoecshzjqkc.exe
      1⤵
      • Executes dropped EXE
      PID:4772

    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

          duaouzhhnek.exe
          • Path C:\Users\Admin\AppData\Local\Temp\duaouzhhnek.exe
          • Size 320KB
          • SHA256 c4b122f7bab30363b472a3dffb8a7c61604c0ec4719ebd233ccbac8be0951be1
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          nsvzgk.exe
          • Path C:\Users\Admin\AppData\Local\Temp\nsvzgk.exe
          • Size 716KB
          • SHA256 6762828465333d4c40ea65f402a87d2ae391e9e351dd2e985b764779527f9c38
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          dczxywfydzmsnqlfcrdczx.wfy
          • Path C:\Users\Admin\AppData\Local\dczxywfydzmsnqlfcrdczx.wfy
          • Size 272B
          • SHA256 31557348bc39a6acb719903b5708bef0fdf530394ec831c91009d0e68f1ec02e
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          uemvhqkoeljaguafnnkuclxgaeubzqwkq.dda
          • Path C:\Users\Admin\AppData\Local\uemvhqkoeljaguafnnkuclxgaeubzqwkq.dda
          • Size 3KB
          • SHA256 4a16595f50612394628776b3d0118c6421ae222f2750fb838b17942fe247d747
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          pgvleuvgdrwuhcpbqx.exe
          • Path C:\Windows\SysWOW64\pgvleuvgdrwuhcpbqx.exe
          • Size 524KB
          • SHA256 ce16cfb716ea2a3ebb272428883f5b7375f2b38c5eeff3c4e455baa9a9fb0168
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download