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
    155s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-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 7 IoCs
    persistence
  • UAC bypass 3 TTPs 16 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 7 IoCs
    defense_evasion
  • Adds Run key to start application 2 TTPs 64 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 14 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 autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Drops file in System32 directory 53 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 53 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 20 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 44 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:4444
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.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:4656
      • C:\Users\Admin\AppData\Local\Temp\xdivyhj.exe
        "C:\Users\Admin\AppData\Local\Temp\xdivyhj.exe" "-C:\Users\Admin\AppData\Local\Temp\wlzvhzkfwibkcptx.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 Location Discovery: System Language Discovery
        • System policy modification
        PID:5792
      • C:\Users\Admin\AppData\Local\Temp\xdivyhj.exe
        "C:\Users\Admin\AppData\Local\Temp\xdivyhj.exe" "-C:\Users\Admin\AppData\Local\Temp\wlzvhzkfwibkcptx.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:3824
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.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:5972
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5796
  • C:\Users\Admin\AppData\Local\Temp\kdvvlhwvqgdqmdltmigz.exe
    C:\Users\Admin\AppData\Local\Temp\kdvvlhwvqgdqmdltmigz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5956
  • C:\Windows\wlzvhzkfwibkcptx.exe
    wlzvhzkfwibkcptx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2536
  • C:\Windows\ztmnebrrnecqnfoxronha.exe
    ztmnebrrnecqnfoxronha.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4140
  • C:\Windows\kdvvlhwvqgdqmdltmigz.exe
    kdvvlhwvqgdqmdltmigz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2176
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\kdvvlhwvqgdqmdltmigz.exe*."
      2⤵
      • Executes dropped EXE
      PID:4844
  • C:\Windows\wlzvhzkfwibkcptx.exe
    wlzvhzkfwibkcptx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2728
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\wlzvhzkfwibkcptx.exe*."
      2⤵
      • Executes dropped EXE
      PID:2344
  • C:\Users\Admin\AppData\Local\Temp\dtifslxtlyscvjotj.exe
    C:\Users\Admin\AppData\Local\Temp\dtifslxtlyscvjotj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1668
  • C:\Windows\kdvvlhwvqgdqmdltmigz.exe
    kdvvlhwvqgdqmdltmigz.exe
    1⤵
    • Executes dropped EXE
    PID:1640
  • C:\Windows\ztmnebrrnecqnfoxronha.exe
    ztmnebrrnecqnfoxronha.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:952
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\ztmnebrrnecqnfoxronha.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:964
  • C:\Windows\dtifslxtlyscvjotj.exe
    dtifslxtlyscvjotj.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:116
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\dtifslxtlyscvjotj.exe*."
      2⤵
      • Executes dropped EXE
      PID:2148
  • C:\Users\Admin\AppData\Local\Temp\xpgfupdbvkgsndkrjeb.exe
    C:\Users\Admin\AppData\Local\Temp\xpgfupdbvkgsndkrjeb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2220
  • C:\Windows\dtifslxtlyscvjotj.exe
    dtifslxtlyscvjotj.exe
    1⤵
    • Executes dropped EXE
    PID:3800
  • C:\Users\Admin\AppData\Local\Temp\ztmnebrrnecqnfoxronha.exe
    C:\Users\Admin\AppData\Local\Temp\ztmnebrrnecqnfoxronha.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3896
  • C:\Users\Admin\AppData\Local\Temp\wlzvhzkfwibkcptx.exe
    C:\Users\Admin\AppData\Local\Temp\wlzvhzkfwibkcptx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1904
  • C:\Windows\xpgfupdbvkgsndkrjeb.exe
    xpgfupdbvkgsndkrjeb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2216
  • C:\Windows\mdtrfzmjcqlwqflric.exe
    mdtrfzmjcqlwqflric.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5260
  • C:\Windows\xpgfupdbvkgsndkrjeb.exe
    xpgfupdbvkgsndkrjeb.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4408
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\xpgfupdbvkgsndkrjeb.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:4808
  • C:\Users\Admin\AppData\Local\Temp\mdtrfzmjcqlwqflric.exe
    C:\Users\Admin\AppData\Local\Temp\mdtrfzmjcqlwqflric.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4208
  • C:\Windows\mdtrfzmjcqlwqflric.exe
    mdtrfzmjcqlwqflric.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5392
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\mdtrfzmjcqlwqflric.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:3452

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

        bzwbwxrvvqsklhuhfgjhe.efz
        • Path C:\Program Files (x86)\bzwbwxrvvqsklhuhfgjhe.efz
        • Size 280B
        • SHA256 b5a0cdb0c335b56bee5adb6d576383ef085b6dca424e785963e07994d836ba03
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bzwbwxrvvqsklhuhfgjhe.efz
        • Path C:\Program Files (x86)\bzwbwxrvvqsklhuhfgjhe.efz
        • Size 280B
        • SHA256 474bb9fe14fc5f12f1f7ca4347420b021c85060cf1c27bf5c073ea2679f8bc48
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bzwbwxrvvqsklhuhfgjhe.efz
        • Path C:\Program Files (x86)\bzwbwxrvvqsklhuhfgjhe.efz
        • Size 280B
        • SHA256 6deb1959cd2d8b8168803a47353a1abcbb605c8f3a8a4e685278cbe0f4d35bd6
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        swjrqpzmcgt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
        • Size 320KB
        • SHA256 174339a889b239283ed95c6137288b9611e6f39674c075bf2960fbac1ac0d750
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        xdivyhj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\xdivyhj.exe
        • Size 696KB
        • SHA256 3e88637404b525472eaead1c963e1b10a457faaaeff65ee89c692551aab6acda
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bzwbwxrvvqsklhuhfgjhe.efz
        • Path C:\Users\Admin\AppData\Local\bzwbwxrvvqsklhuhfgjhe.efz
        • Size 280B
        • SHA256 d286e7813d59e3c8e970bc0dd501af824c41df77afa85f1250abec8bd8adfa2b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wfndjvapagtwipnlugudlbhtynyerugn.jse
        • Path C:\Users\Admin\AppData\Local\wfndjvapagtwipnlugudlbhtynyerugn.jse
        • Size 4KB
        • SHA256 92bec6400dd820e62d7ca634ddba9a1e23b5cdbabdd8486b85b81740cb809b14
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        rbkbivbrdky.bat
        • Path C:\rbkbivbrdky.bat
        • Size 648KB
        • SHA256 63f718b62089efcf70d190c41857e8d1c69b79cb4c4395e0e0835e08cbe55f86
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download