Overview

overview

10

Static

static

3

tmphfvfi_nh.exe

windows10-ltsc_2021-x64

10

tmphfvfi_nh.exe

windows10-2004-x64

10

tmphfvfi_nh.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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, 15:24

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General

  • Target
    tmphfvfi_nh.exe
  • Size 988KB
  • Sample260522-ss3zeshz4t
  • SHA256 0f780901563b453854e1595f8cb3414ce162e9398b766d6066a0356037b04abc
  • 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 7 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 9 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 57 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 42 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmphfvfi_nh.exe
    "C:\Users\Admin\AppData\Local\Temp\tmphfvfi_nh.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4228
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\users\admin\appdata\local\temp\tmphfvfi_nh.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:3688
      • C:\Users\Admin\AppData\Local\Temp\yemtv.exe
        "C:\Users\Admin\AppData\Local\Temp\yemtv.exe" "-C:\Users\Admin\AppData\Local\Temp\vmfxkukbwyzfeimk.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:3744
      • C:\Users\Admin\AppData\Local\Temp\yemtv.exe
        "C:\Users\Admin\AppData\Local\Temp\yemtv.exe" "-C:\Users\Admin\AppData\Local\Temp\vmfxkukbwyzfeimk.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:4268
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\users\admin\appdata\local\temp\tmphfvfi_nh.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:2568
  • C:\Windows\jebxocwrqwblowegxlgd.exe
    jebxocwrqwblowegxlgd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2300
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\windows\jebxocwrqwblowegxlgd.exe*."
      2⤵
      • Executes dropped EXE
      PID:996
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4452
  • C:\Windows\leztiumfcgjrsyeetf.exe
    leztiumfcgjrsyeetf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1524
  • C:\Windows\leztiumfcgjrsyeetf.exe
    leztiumfcgjrsyeetf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:460
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\windows\leztiumfcgjrsyeetf.exe*."
      2⤵
      • Executes dropped EXE
      PID:3640
  • C:\Windows\cuohvgxploqxxchgu.exe
    cuohvgxploqxxchgu.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3832
  • C:\Users\Admin\AppData\Local\Temp\wqmhxkdxvaenpwdeuhb.exe
    C:\Users\Admin\AppData\Local\Temp\wqmhxkdxvaenpwdeuhb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1840
  • C:\Users\Admin\AppData\Local\Temp\vmfxkukbwyzfeimk.exe
    C:\Users\Admin\AppData\Local\Temp\vmfxkukbwyzfeimk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1512
  • C:\Windows\wqmhxkdxvaenpwdeuhb.exe
    wqmhxkdxvaenpwdeuhb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3052
  • C:\Users\Admin\AppData\Local\Temp\yusphwrnnualpyhkcrnli.exe
    C:\Users\Admin\AppData\Local\Temp\yusphwrnnualpyhkcrnli.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2280
  • C:\Windows\wqmhxkdxvaenpwdeuhb.exe
    wqmhxkdxvaenpwdeuhb.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4492
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\windows\wqmhxkdxvaenpwdeuhb.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:3924
  • C:\Users\Admin\AppData\Local\Temp\jebxocwrqwblowegxlgd.exe
    C:\Users\Admin\AppData\Local\Temp\jebxocwrqwblowegxlgd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3860
  • C:\Windows\cuohvgxploqxxchgu.exe
    cuohvgxploqxxchgu.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4336
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\windows\cuohvgxploqxxchgu.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:3640
  • C:\Windows\jebxocwrqwblowegxlgd.exe
    jebxocwrqwblowegxlgd.exe
    1⤵
    • Executes dropped EXE
    PID:3260
  • C:\Users\Admin\AppData\Local\Temp\cuohvgxploqxxchgu.exe
    C:\Users\Admin\AppData\Local\Temp\cuohvgxploqxxchgu.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4712
  • C:\Windows\vmfxkukbwyzfeimk.exe
    vmfxkukbwyzfeimk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2200
  • C:\Windows\yusphwrnnualpyhkcrnli.exe
    yusphwrnnualpyhkcrnli.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4888
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\windows\yusphwrnnualpyhkcrnli.exe*."
      2⤵
      • Executes dropped EXE
      PID:2432
  • C:\Windows\vmfxkukbwyzfeimk.exe
    vmfxkukbwyzfeimk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5076
    • C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
      "C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe" "c:\windows\vmfxkukbwyzfeimk.exe*."
      2⤵
      • Executes dropped EXE
      PID:2180
  • C:\Users\Admin\AppData\Local\Temp\leztiumfcgjrsyeetf.exe
    C:\Users\Admin\AppData\Local\Temp\leztiumfcgjrsyeetf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1464
  • C:\Windows\yusphwrnnualpyhkcrnli.exe
    yusphwrnnualpyhkcrnli.exe
    1⤵
    • Executes dropped EXE
    PID:4936

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

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        Downloads

        pubhigkpyodxkcughfkrxywafo.tna
        • Path C:\Program Files (x86)\pubhigkpyodxkcughfkrxywafo.tna
        • Size 260B
        • SHA256 4dc4e8be79ef3d07e4dafaa16d38835869811c149fcb183ee7a055d1e9559034
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        pubhigkpyodxkcughfkrxywafo.tna
        • Path C:\Program Files (x86)\pubhigkpyodxkcughfkrxywafo.tna
        • Size 260B
        • SHA256 823c547b71fa663a2ab4d1b068aa47f690da29e1f3d5532820d8e5a9508a28ad
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fbcwvunvplm.exe
        • Path C:\Users\Admin\AppData\Local\Temp\fbcwvunvplm.exe
        • Size 320KB
        • SHA256 34a5f9e2b494b086abad2721019be271fa43350c9146f000e50fe554f170743d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        yemtv.exe
        • Path C:\Users\Admin\AppData\Local\Temp\yemtv.exe
        • Size 680KB
        • SHA256 7cff91710cd0430c4c78ce34bc1a452f36c812ae9eddf746e6f2ee3f7fac6698
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pubhigkpyodxkcughfkrxywafo.tna
        • Path C:\Users\Admin\AppData\Local\pubhigkpyodxkcughfkrxywafo.tna
        • Size 260B
        • SHA256 61cc7d7889bd7190e56d35cdb5b371c0c444dcf9062192820e9021ef22ae99a3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qgypbkzpjkkpnqtqclbtkwfukeffkilolxgwo.rap
        • Path C:\Users\Admin\AppData\Local\qgypbkzpjkkpnqtqclbtkwfukeffkilolxgwo.rap
        • Size 3KB
        • SHA256 36d94b524572223c15003750cf3adfa4d3a05f3ce053bc1783939af6bc266b18
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        jebxocwrqwblowegxlgd.exe
        • Path C:\Windows\jebxocwrqwblowegxlgd.exe
        • Size 988KB
        • SHA256 0f780901563b453854e1595f8cb3414ce162e9398b766d6066a0356037b04abc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download