Overview

overview

10

Static

static

3

tmp6tv4n76r.exe

windows10-ltsc_2021-x64

10

tmp6tv4n76r.exe

windows10-2004-x64

10

tmp6tv4n76r.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • 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, 14:04

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General

  • Target
    tmp6tv4n76r.exe
  • Size 1016KB
  • Sample260522-rdsdpsds6m
  • SHA256 1adfe64c20a9e0ec8625ef833b81288dbb1af3ebe44bf10903a87b372937d2e5
  • 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 39 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 9 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\tmp6tv4n76r.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp6tv4n76r.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4268
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\users\admin\appdata\local\temp\tmp6tv4n76r.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:392
      • C:\Users\Admin\AppData\Local\Temp\ehftq.exe
        "C:\Users\Admin\AppData\Local\Temp\ehftq.exe" "-C:\Users\Admin\AppData\Local\Temp\bpyxfxtdwiabhucv.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:944
      • C:\Users\Admin\AppData\Local\Temp\ehftq.exe
        "C:\Users\Admin\AppData\Local\Temp\ehftq.exe" "-C:\Users\Admin\AppData\Local\Temp\bpyxfxtdwiabhucv.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:992
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\users\admin\appdata\local\temp\tmp6tv4n76r.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:4444
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5004
  • C:\Windows\phuxjfftqgchriurhuld.exe
    phuxjfftqgchriurhuld.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2064
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\phuxjfftqgchriurhuld.exe*."
      2⤵
      • Executes dropped EXE
      PID:3356
  • C:\Windows\ixhhqjgrlyrtaoxre.exe
    ixhhqjgrlyrtaoxre.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2664
  • C:\Windows\ixhhqjgrlyrtaoxre.exe
    ixhhqjgrlyrtaoxre.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2996
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\ixhhqjgrlyrtaoxre.exe*."
      2⤵
      • Executes dropped EXE
      PID:1504
  • C:\Users\Admin\AppData\Local\Temp\phuxjfftqgchriurhuld.exe
    C:\Users\Admin\AppData\Local\Temp\phuxjfftqgchriurhuld.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:664
  • C:\Windows\exlpczapnebhskxvmaslz.exe
    exlpczapnebhskxvmaslz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2320
  • C:\Users\Admin\AppData\Local\Temp\ctfhsnmzvkfjsitpeqg.exe
    C:\Users\Admin\AppData\Local\Temp\ctfhsnmzvkfjsitpeqg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:224
  • C:\Windows\ctfhsnmzvkfjsitpeqg.exe
    ctfhsnmzvkfjsitpeqg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2116
  • C:\Windows\rhstdxvhcqknvkupdo.exe
    rhstdxvhcqknvkupdo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4604
  • C:\Users\Admin\AppData\Local\Temp\rhstdxvhcqknvkupdo.exe
    C:\Users\Admin\AppData\Local\Temp\rhstdxvhcqknvkupdo.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4540
  • C:\Windows\bpyxfxtdwiabhucv.exe
    bpyxfxtdwiabhucv.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2748
  • C:\Windows\bpyxfxtdwiabhucv.exe
    bpyxfxtdwiabhucv.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1452
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\bpyxfxtdwiabhucv.exe*."
      2⤵
      • Executes dropped EXE
      PID:1812
  • C:\Windows\ctfhsnmzvkfjsitpeqg.exe
    ctfhsnmzvkfjsitpeqg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2112
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\ctfhsnmzvkfjsitpeqg.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:868
  • C:\Users\Admin\AppData\Local\Temp\ixhhqjgrlyrtaoxre.exe
    C:\Users\Admin\AppData\Local\Temp\ixhhqjgrlyrtaoxre.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2736
  • C:\Windows\phuxjfftqgchriurhuld.exe
    phuxjfftqgchriurhuld.exe
    1⤵
    • Executes dropped EXE
    PID:3584
  • C:\Windows\rhstdxvhcqknvkupdo.exe
    rhstdxvhcqknvkupdo.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4628
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\rhstdxvhcqknvkupdo.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:1144
  • C:\Users\Admin\AppData\Local\Temp\bpyxfxtdwiabhucv.exe
    C:\Users\Admin\AppData\Local\Temp\bpyxfxtdwiabhucv.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4872
  • C:\Users\Admin\AppData\Local\Temp\exlpczapnebhskxvmaslz.exe
    C:\Users\Admin\AppData\Local\Temp\exlpczapnebhskxvmaslz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2856
  • C:\Windows\exlpczapnebhskxvmaslz.exe
    exlpczapnebhskxvmaslz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2944
    • C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
      "C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe" "c:\windows\exlpczapnebhskxvmaslz.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:3164

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

        gfzjcfmhlilxomfjgayxrbu.ezd
        • Path C:\Program Files (x86)\gfzjcfmhlilxomfjgayxrbu.ezd
        • Size 280B
        • SHA256 6da7af0f4fe9447adb5f629bcaaf4c85c4558e1cd87ab83bf864c747ecc2bab2
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        gfzjcfmhlilxomfjgayxrbu.ezd
        • Path C:\Program Files (x86)\gfzjcfmhlilxomfjgayxrbu.ezd
        • Size 280B
        • SHA256 98f440fe06c3f7bcb6015801cec00bc54aa1e5538f363aa57703a2cc08552fed
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        gfzjcfmhlilxomfjgayxrbu.ezd
        • Path C:\Program Files (x86)\gfzjcfmhlilxomfjgayxrbu.ezd
        • Size 280B
        • SHA256 04f554bc0cd0e550e3e51fac811f45ca725adb7e965ed18d6c49db5007956697
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ehftq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ehftq.exe
        • Size 692KB
        • SHA256 e1d3bab0c3ddfb678e73c60a45b1b5d3d118f9a1f0c912abcdfe402e878a9861
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        rnowznuybxy.exe
        • Path C:\Users\Admin\AppData\Local\Temp\rnowznuybxy.exe
        • Size 320KB
        • SHA256 b2979fab91993a58479b84356bb6d906311030de7643bb0a71c936a210125265
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        gfzjcfmhlilxomfjgayxrbu.ezd
        • Path C:\Users\Admin\AppData\Local\gfzjcfmhlilxomfjgayxrbu.ezd
        • Size 280B
        • SHA256 d2615cb039a167f647e4667245d217931a39e45b22460e376e07587823ebb3b3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        gfzjcfmhlilxomfjgayxrbu.ezd
        • Path C:\Users\Admin\AppData\Local\gfzjcfmhlilxomfjgayxrbu.ezd
        • Size 280B
        • SHA256 a48f793538a995b4a362899284a15aded2cc8e3b0bc17ac4069b3a8dfe582104
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tdidhvntiqebdmqfnsblqlpdvbqymjluyn.ajt
        • Path C:\Users\Admin\AppData\Local\tdidhvntiqebdmqfnsblqlpdvbqymjluyn.ajt
        • Size 4KB
        • SHA256 b447d785f4db309dd4c2267faba8742e834782ddfd9cee74ee1db6cc43074a81
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        rhstdxvhcqknvkupdo.exe
        • Path C:\Windows\SysWOW64\rhstdxvhcqknvkupdo.exe
        • Size 1016KB
        • SHA256 1adfe64c20a9e0ec8625ef833b81288dbb1af3ebe44bf10903a87b372937d2e5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download