Overview

overview

10

Static

static

3

tmpgvcwtt0d.exe

windows10-ltsc_2021-x64

10

tmpgvcwtt0d.exe

windows10-2004-x64

10

tmpgvcwtt0d.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
    22/05/2026, 14:12

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General

  • Target
    tmpgvcwtt0d.exe
  • Size 512KB
  • Sample260522-rh871sdv7p
  • SHA256 1d643f3ceaf2d8b1acfe46aa928f34a9af91dce13564e42af144585764a7bb67
  • 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
  • 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 7 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 19 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\tmpgvcwtt0d.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpgvcwtt0d.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\users\admin\appdata\local\temp\tmpgvcwtt0d.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:3872
      • C:\Users\Admin\AppData\Local\Temp\cfopp.exe
        "C:\Users\Admin\AppData\Local\Temp\cfopp.exe" "-C:\Users\Admin\AppData\Local\Temp\znhtedtfufukyior.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:4684
      • C:\Users\Admin\AppData\Local\Temp\cfopp.exe
        "C:\Users\Admin\AppData\Local\Temp\cfopp.exe" "-C:\Users\Admin\AppData\Local\Temp\znhtedtfufukyior.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:3416
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\users\admin\appdata\local\temp\tmpgvcwtt0d.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:3752
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1996
  • C:\Windows\znhtedtfufukyior.exe
    znhtedtfufukyior.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3784
  • C:\Windows\cvulbfarlbvqjyjryvone.exe
    cvulbfarlbvqjyjryvone.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4824
  • C:\Users\Admin\AppData\Local\Temp\pfbpcdvjanewmyglpj.exe
    C:\Users\Admin\AppData\Local\Temp\pfbpcdvjanewmyglpj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:464
  • C:\Windows\nfdtilfvodwqiwgntphf.exe
    nfdtilfvodwqiwgntphf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3632
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\nfdtilfvodwqiwgntphf.exe*."
      2⤵
      • Executes dropped EXE
      PID:2940
  • C:\Users\Admin\AppData\Local\Temp\znhtedtfufukyior.exe
    C:\Users\Admin\AppData\Local\Temp\znhtedtfufukyior.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4472
  • C:\Windows\znhtedtfufukyior.exe
    znhtedtfufukyior.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5048
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\znhtedtfufukyior.exe*."
      2⤵
      • Executes dropped EXE
      PID:3384
  • C:\Windows\arodrtmbthzsjwflqlc.exe
    arodrtmbthzsjwflqlc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2456
  • C:\Windows\gvqdppgtjvlcrcjnq.exe
    gvqdppgtjvlcrcjnq.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1052
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\gvqdppgtjvlcrcjnq.exe*."
      2⤵
      • Executes dropped EXE
      PID:744
  • C:\Windows\pfbpcdvjanewmyglpj.exe
    pfbpcdvjanewmyglpj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1392
  • C:\Windows\pfbpcdvjanewmyglpj.exe
    pfbpcdvjanewmyglpj.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1000
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\pfbpcdvjanewmyglpj.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:212
  • C:\Users\Admin\AppData\Local\Temp\nfdtilfvodwqiwgntphf.exe
    C:\Users\Admin\AppData\Local\Temp\nfdtilfvodwqiwgntphf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2960
  • C:\Users\Admin\AppData\Local\Temp\gvqdppgtjvlcrcjnq.exe
    C:\Users\Admin\AppData\Local\Temp\gvqdppgtjvlcrcjnq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3880
  • C:\Windows\arodrtmbthzsjwflqlc.exe
    arodrtmbthzsjwflqlc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:932
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\arodrtmbthzsjwflqlc.exe*."
      2⤵
      • Executes dropped EXE
      PID:3480
  • C:\Users\Admin\AppData\Local\Temp\arodrtmbthzsjwflqlc.exe
    C:\Users\Admin\AppData\Local\Temp\arodrtmbthzsjwflqlc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4532
  • C:\Windows\nfdtilfvodwqiwgntphf.exe
    nfdtilfvodwqiwgntphf.exe
    1⤵
    • Executes dropped EXE
    PID:4732
  • C:\Windows\gvqdppgtjvlcrcjnq.exe
    gvqdppgtjvlcrcjnq.exe
    1⤵
    • Executes dropped EXE
    PID:1752
  • C:\Users\Admin\AppData\Local\Temp\cvulbfarlbvqjyjryvone.exe
    C:\Users\Admin\AppData\Local\Temp\cvulbfarlbvqjyjryvone.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3912
  • C:\Windows\cvulbfarlbvqjyjryvone.exe
    cvulbfarlbvqjyjryvone.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1628
    • C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
      "C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe" "c:\windows\cvulbfarlbvqjyjryvone.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:876

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

        cfopp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\cfopp.exe
        • Size 704KB
        • SHA256 aca55c1bc14cf25887e546a9055c553cd88f93c7e4fbfae8af2b5e8116ba500e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mwhqvwurwgr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mwhqvwurwgr.exe
        • Size 320KB
        • SHA256 7c63b0d5c376d8fbc5ab7b5fcc673aa72f68be76c2872358361efffda5995abd
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dbfbwffbavuusmcpbdbfbw.fba
        • Path C:\Users\Admin\AppData\Local\dbfbwffbavuusmcpbdbfbw.fba
        • Size 280B
        • SHA256 7efcdc83ce21f8cdbe2c3d1d4dd15e508b14e36bdcb6574f3f9de5368fc61394
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        udszfzkrbhrclqrpmzixekepwgmwhqvwu.enc
        • Path C:\Users\Admin\AppData\Local\udszfzkrbhrclqrpmzixekepwgmwhqvwu.enc
        • Size 4KB
        • SHA256 3d5f05ce9533c0d22e2f6a3475b49bf19ad00d9c596a463bbbc354b5a709d12b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pfbpcdvjanewmyglpj.exe
        • Path C:\Windows\SysWOW64\pfbpcdvjanewmyglpj.exe
        • Size 512KB
        • SHA256 1d643f3ceaf2d8b1acfe46aa928f34a9af91dce13564e42af144585764a7bb67
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download