Overview

overview

10

Static

static

3

tmp7tahrmn5.exe

windows10-ltsc_2021-x64

10

tmp7tahrmn5.exe

windows10-2004-x64

10

tmp7tahrmn5.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    146s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    02/06/2026, 02:49

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General

  • Target
    tmp7tahrmn5.exe
  • Size 1016KB
  • Sample260602-dbbraadw2m
  • SHA256 383bd1a96891bc0ccfe0dc4131dd73273c82dc7667eb68f6c5aef189bd6511a5
  • 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 37 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 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 4 IoCs

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

  • 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 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\tmp7tahrmn5.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp7tahrmn5.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4228
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmp7tahrmn5.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:2520
      • C:\Users\Admin\AppData\Local\Temp\zfnovek.exe
        "C:\Users\Admin\AppData\Local\Temp\zfnovek.exe" "-C:\Users\Admin\AppData\Local\Temp\yneoewliqkwpsmkx.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:1404
      • C:\Users\Admin\AppData\Local\Temp\zfnovek.exe
        "C:\Users\Admin\AppData\Local\Temp\zfnovek.exe" "-C:\Users\Admin\AppData\Local\Temp\yneoewliqkwpsmkx.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:3332
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\users\admin\appdata\local\temp\tmp7tahrmn5.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:1352
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5096
  • C:\Windows\bvrgbysuhgxvdcfxlipjf.exe
    bvrgbysuhgxvdcfxlipjf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2552
  • C:\Windows\fvnypiywfanhlgftd.exe
    fvnypiywfanhlgftd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4260
  • C:\Users\Admin\AppData\Local\Temp\fvnypiywfanhlgftd.exe
    C:\Users\Admin\AppData\Local\Temp\fvnypiywfanhlgftd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5100
  • C:\Windows\yneoewliqkwpsmkx.exe
    yneoewliqkwpsmkx.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4188
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\yneoewliqkwpsmkx.exe*."
      2⤵
      • Executes dropped EXE
      PID:2732
  • C:\Windows\zrlyrmeepmbxdabrdyd.exe
    zrlyrmeepmbxdabrdyd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3336
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\zrlyrmeepmbxdabrdyd.exe*."
      2⤵
      • Executes dropped EXE
      PID:1584
  • C:\Windows\yneoewliqkwpsmkx.exe
    yneoewliqkwpsmkx.exe
    1⤵
    • Executes dropped EXE
    PID:2668
  • C:\Windows\mfaoiexykiyvcactgcib.exe
    mfaoiexykiyvcactgcib.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2228
  • C:\Windows\bvrgbysuhgxvdcfxlipjf.exe
    bvrgbysuhgxvdcfxlipjf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1052
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\bvrgbysuhgxvdcfxlipjf.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:3224
  • C:\Users\Admin\AppData\Local\Temp\bvrgbysuhgxvdcfxlipjf.exe
    C:\Users\Admin\AppData\Local\Temp\bvrgbysuhgxvdcfxlipjf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1856
  • C:\Users\Admin\AppData\Local\Temp\ofykcwnmwsgbgccrcw.exe
    C:\Users\Admin\AppData\Local\Temp\ofykcwnmwsgbgccrcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3792
  • C:\Windows\fvnypiywfanhlgftd.exe
    fvnypiywfanhlgftd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\fvnypiywfanhlgftd.exe*."
      2⤵
      • Executes dropped EXE
      PID:4616
  • C:\Users\Admin\AppData\Local\Temp\yneoewliqkwpsmkx.exe
    C:\Users\Admin\AppData\Local\Temp\yneoewliqkwpsmkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4736
  • C:\Windows\ofykcwnmwsgbgccrcw.exe
    ofykcwnmwsgbgccrcw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1584
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\ofykcwnmwsgbgccrcw.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:1712
  • C:\Windows\zrlyrmeepmbxdabrdyd.exe
    zrlyrmeepmbxdabrdyd.exe
    1⤵
    • Executes dropped EXE
    PID:1528
  • C:\Users\Admin\AppData\Local\Temp\mfaoiexykiyvcactgcib.exe
    C:\Users\Admin\AppData\Local\Temp\mfaoiexykiyvcactgcib.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2484
  • C:\Windows\ofykcwnmwsgbgccrcw.exe
    ofykcwnmwsgbgccrcw.exe
    1⤵
    • Executes dropped EXE
    PID:4216
  • C:\Windows\mfaoiexykiyvcactgcib.exe
    mfaoiexykiyvcactgcib.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3572
    • C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
      "C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe" "c:\windows\mfaoiexykiyvcactgcib.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:844
  • C:\Users\Admin\AppData\Local\Temp\zrlyrmeepmbxdabrdyd.exe
    C:\Users\Admin\AppData\Local\Temp\zrlyrmeepmbxdabrdyd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4544

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

        Loading Replay Monitor...

        Downloads

        nbzohptgxlj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nbzohptgxlj.exe
        • Size 320KB
        • SHA256 16517d800f2300e62a5eb97da3340c487ef7e43db76ae1af7e175c540cca8b8e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zfnovek.exe
        • Path C:\Users\Admin\AppData\Local\Temp\zfnovek.exe
        • Size 700KB
        • SHA256 078e92aacd8a3fc548c670b24b71de058afcde75f5894d854c2df1f82d12b662
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        cbcwwyxewawzmqyvoqcbcw.yxe
        • Path C:\Users\Admin\AppData\Local\cbcwwyxewawzmqyvoqcbcw.yxe
        • Size 280B
        • SHA256 33c2c91c9aa788ebf1b4883f94fd94543ecf40e8d2f6a7d982544ae811a924b1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tdpufscuxmthfunvzmjtfkviskncjxvkd.pcz
        • Path C:\Users\Admin\AppData\Local\tdpufscuxmthfunvzmjtfkviskncjxvkd.pcz
        • Size 4KB
        • SHA256 2fded02360dd48470142ecbd54b6dc09d804031a2e37d08c38919149e275f628
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ofykcwnmwsgbgccrcw.exe
        • Path C:\Windows\SysWOW64\ofykcwnmwsgbgccrcw.exe
        • Size 1016KB
        • SHA256 383bd1a96891bc0ccfe0dc4131dd73273c82dc7667eb68f6c5aef189bd6511a5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download