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
    149s
  • max time network
    150s
  • 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, 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 34 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 file in System32 directory 64 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 56 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 16 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 41 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmphfvfi_nh.exe
    "C:\Users\Admin\AppData\Local\Temp\tmphfvfi_nh.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:960
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.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
      • 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:2592
      • C:\Users\Admin\AppData\Local\Temp\lnadgm.exe
        "C:\Users\Admin\AppData\Local\Temp\lnadgm.exe" "-C:\Users\Admin\AppData\Local\Temp\xjgtgwlirhivznvz.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:2964
      • C:\Users\Admin\AppData\Local\Temp\lnadgm.exe
        "C:\Users\Admin\AppData\Local\Temp\lnadgm.exe" "-C:\Users\Admin\AppData\Local\Temp\xjgtgwlirhivznvz.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:4948
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.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:3020
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4556
  • C:\Users\Admin\AppData\Local\Temp\artldysuidjbkdqzjcofh.exe
    C:\Users\Admin\AppData\Local\Temp\artldysuidjbkdqzjcofh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3160
  • C:\Windows\xjgtgwlirhivznvz.exe
    xjgtgwlirhivznvz.exe
    1⤵
    • Executes dropped EXE
    PID:2172
  • C:\Windows\lbctkexylfkbjbnvewhx.exe
    lbctkexylfkbjbnvewhx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3212
  • C:\Windows\xjgtgwlirhivznvz.exe
    xjgtgwlirhivznvz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2280
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\xjgtgwlirhivznvz.exe*."
      2⤵
      • Executes dropped EXE
      PID:1220
  • C:\Windows\nbapewnmxpshndntaq.exe
    nbapewnmxpshndntaq.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2156
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\nbapewnmxpshndntaq.exe*."
      2⤵
      • Executes dropped EXE
      PID:2664
  • C:\Users\Admin\AppData\Local\Temp\nbapewnmxpshndntaq.exe
    C:\Users\Admin\AppData\Local\Temp\nbapewnmxpshndntaq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4720
  • C:\Windows\erpdriywgxznshqvb.exe
    erpdriywgxznshqvb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3212
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\erpdriywgxznshqvb.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:2176
  • C:\Windows\artldysuidjbkdqzjcofh.exe
    artldysuidjbkdqzjcofh.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1996
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\artldysuidjbkdqzjcofh.exe*."
      2⤵
      • Executes dropped EXE
      PID:4200
  • C:\Users\Admin\AppData\Local\Temp\xjgtgwlirhivznvz.exe
    C:\Users\Admin\AppData\Local\Temp\xjgtgwlirhivznvz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2864
  • C:\Windows\nbapewnmxpshndntaq.exe
    nbapewnmxpshndntaq.exe
    1⤵
    • Executes dropped EXE
    PID:1192
  • C:\Windows\ynndtmeeqjndkbmtbsc.exe
    ynndtmeeqjndkbmtbsc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4152
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\ynndtmeeqjndkbmtbsc.exe*."
      2⤵
      • Executes dropped EXE
      PID:1676
  • C:\Users\Admin\AppData\Local\Temp\erpdriywgxznshqvb.exe
    C:\Users\Admin\AppData\Local\Temp\erpdriywgxznshqvb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4576
  • C:\Windows\erpdriywgxznshqvb.exe
    erpdriywgxznshqvb.exe
    1⤵
    • Executes dropped EXE
    PID:732
  • C:\Users\Admin\AppData\Local\Temp\ynndtmeeqjndkbmtbsc.exe
    C:\Users\Admin\AppData\Local\Temp\ynndtmeeqjndkbmtbsc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4988
  • C:\Windows\lbctkexylfkbjbnvewhx.exe
    lbctkexylfkbjbnvewhx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2796
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\lbctkexylfkbjbnvewhx.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:3628
  • C:\Windows\ynndtmeeqjndkbmtbsc.exe
    ynndtmeeqjndkbmtbsc.exe
    1⤵
    • Executes dropped EXE
    PID:4428
  • C:\Windows\artldysuidjbkdqzjcofh.exe
    artldysuidjbkdqzjcofh.exe
    1⤵
    • Executes dropped EXE
    PID:4656
  • C:\Users\Admin\AppData\Local\Temp\lbctkexylfkbjbnvewhx.exe
    C:\Users\Admin\AppData\Local\Temp\lbctkexylfkbjbnvewhx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:772

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

        System Information Discovery

        2
        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

        lnadgm.exe
        • Path C:\Users\Admin\AppData\Local\Temp\lnadgm.exe
        • Size 700KB
        • SHA256 84df4e4fab6c4cafab12651f8c7c112d110f1558cd00c93a3dac4f4344bad14d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        fdmlkmnwrtgfvvpfwwpnwvuw.gbd
        • Path C:\Users\Admin\AppData\Local\fdmlkmnwrtgfvvpfwwpnwvuw.gbd
        • Size 260B
        • SHA256 6b0d9348abc49815784574463c53f9a12b3a02ad561a5cf028a3866edc72c27f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        oxrblykekxvfgrwxzkoxrblykekxvfgrwxz.oxr
        • Path C:\Users\Admin\AppData\Local\oxrblykekxvfgrwxzkoxrblykekxvfgrwxz.oxr
        • Size 3KB
        • SHA256 a391edf459e3f00b50da95a30560c61ebd07e02d672b9b0c6f1f1e78004b7839
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nbapewnmxpshndntaq.exe
        • Path C:\Windows\SysWOW64\nbapewnmxpshndntaq.exe
        • Size 988KB
        • SHA256 0f780901563b453854e1595f8cb3414ce162e9398b766d6066a0356037b04abc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download