Overview

overview

10

Static

static

3

tmpfoxpotz0.exe

windows10-ltsc_2021-x64

10

tmpfoxpotz0.exe

windows10-2004-x64

10

tmpfoxpotz0.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/06/2026, 03:52

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    tmpfoxpotz0.exe
  • Size 1016KB
  • Sample260602-efdbcadt7y
  • SHA256 94297af35450e94c09bbc9a6216363c4c8a11a6a50169ca8c9cec594595aacc3
  • 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 37 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 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 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 46 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 46 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\tmpfoxpotz0.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpfoxpotz0.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3824
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\users\admin\appdata\local\temp\tmpfoxpotz0.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:3520
      • C:\Users\Admin\AppData\Local\Temp\afnucij.exe
        "C:\Users\Admin\AppData\Local\Temp\afnucij.exe" "-C:\Users\Admin\AppData\Local\Temp\zneulakirgybgsge.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:4392
      • C:\Users\Admin\AppData\Local\Temp\afnucij.exe
        "C:\Users\Admin\AppData\Local\Temp\afnucij.exe" "-C:\Users\Admin\AppData\Local\Temp\zneulakirgybgsge.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:4276
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\users\admin\appdata\local\temp\tmpfoxpotz0.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:468
  • C:\Windows\zneulakirgybgsge.exe
    zneulakirgybgsge.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4404
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2148
  • C:\Windows\pfyqjammxoinuiyysj.exe
    pfyqjammxoinuiyysj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2616
  • C:\Windows\nfaupiwyleahqgyawphc.exe
    nfaupiwyleahqgyawphc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5112
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\nfaupiwyleahqgyawphc.exe*."
      2⤵
      • Executes dropped EXE
      PID:4476
  • C:\Users\Admin\AppData\Local\Temp\pfyqjammxoinuiyysj.exe
    C:\Users\Admin\AppData\Local\Temp\pfyqjammxoinuiyysj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1116
  • C:\Windows\gvnewmxwgwptzmbat.exe
    gvnewmxwgwptzmbat.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4036
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\gvnewmxwgwptzmbat.exe*."
      2⤵
      • Executes dropped EXE
      PID:4184
  • C:\Users\Admin\AppData\Local\Temp\cvrmicruiczhribebvokf.exe
    C:\Users\Admin\AppData\Local\Temp\cvrmicruiczhribebvokf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2040
  • C:\Windows\arleyqdeqidjrgxytlc.exe
    arleyqdeqidjrgxytlc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3780
  • C:\Windows\arleyqdeqidjrgxytlc.exe
    arleyqdeqidjrgxytlc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4400
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\arleyqdeqidjrgxytlc.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:4368
  • C:\Windows\zneulakirgybgsge.exe
    zneulakirgybgsge.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\zneulakirgybgsge.exe*."
      2⤵
      • Executes dropped EXE
      PID:4540
  • C:\Users\Admin\AppData\Local\Temp\arleyqdeqidjrgxytlc.exe
    C:\Users\Admin\AppData\Local\Temp\arleyqdeqidjrgxytlc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4980
  • C:\Users\Admin\AppData\Local\Temp\nfaupiwyleahqgyawphc.exe
    C:\Users\Admin\AppData\Local\Temp\nfaupiwyleahqgyawphc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2084
  • C:\Users\Admin\AppData\Local\Temp\zneulakirgybgsge.exe
    C:\Users\Admin\AppData\Local\Temp\zneulakirgybgsge.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3792
  • C:\Windows\pfyqjammxoinuiyysj.exe
    pfyqjammxoinuiyysj.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3780
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\pfyqjammxoinuiyysj.exe*."
      2⤵
      • Executes dropped EXE
      PID:4456
  • C:\Windows\nfaupiwyleahqgyawphc.exe
    nfaupiwyleahqgyawphc.exe
    1⤵
    • Executes dropped EXE
    PID:1812
  • C:\Windows\gvnewmxwgwptzmbat.exe
    gvnewmxwgwptzmbat.exe
    1⤵
    • Executes dropped EXE
    PID:1888
  • C:\Users\Admin\AppData\Local\Temp\gvnewmxwgwptzmbat.exe
    C:\Users\Admin\AppData\Local\Temp\gvnewmxwgwptzmbat.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1904
  • C:\Windows\cvrmicruiczhribebvokf.exe
    cvrmicruiczhribebvokf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3684
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\cvrmicruiczhribebvokf.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:3792
  • C:\Windows\cvrmicruiczhribebvokf.exe
    cvrmicruiczhribebvokf.exe
    1⤵
    • Executes dropped EXE
    PID:4600

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

        Loading Replay Monitor...

        Downloads

        mnruyaxieglbtstejlmqtxzwh.fka
        • Path C:\Program Files (x86)\mnruyaxieglbtstejlmqtxzwh.fka
        • Size 280B
        • SHA256 6265dadbd8b1ede889fc9e312fa4c5b49571a9135a726ecda2f074ea8948e061
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        mnruyaxieglbtstejlmqtxzwh.fka
        • Path C:\Program Files (x86)\mnruyaxieglbtstejlmqtxzwh.fka
        • Size 280B
        • SHA256 cbe26f3054ccd92c4037d7b60f4f842ab9d03afb8d0f8742d047c4bbb0a18768
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        afnucij.exe
        • Path C:\Users\Admin\AppData\Local\Temp\afnucij.exe
        • Size 708KB
        • SHA256 3d4045523a1acf1af73108dc3ac9ed1cbff394bb71e945a2b74749a2836891bc
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nayyfohuxki.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
        • Size 320KB
        • SHA256 59c119747974fc27a7eda068d391adb247bb70ca7b204b07dd21d2a009052d6e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mnruyaxieglbtstejlmqtxzwh.fka
        • Path C:\Users\Admin\AppData\Local\mnruyaxieglbtstejlmqtxzwh.fka
        • Size 280B
        • SHA256 0a9af1309932a7f82a8b6795bd1b7945368d792808fdd81a360d09d2421d7619
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        rdsgviqmtgwxakwsivhwkzmuqxkabeoawmzl.odq
        • Path C:\Users\Admin\AppData\Local\rdsgviqmtgwxakwsivhwkzmuqxkabeoawmzl.odq
        • Size 4KB
        • SHA256 85254ba744625ee3caa1f5db4904fc7f4f79f2849285e96dd1a3321727186296
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        pfyqjammxoinuiyysj.exe
        • Path C:\Windows\SysWOW64\pfyqjammxoinuiyysj.exe
        • Size 1016KB
        • SHA256 94297af35450e94c09bbc9a6216363c4c8a11a6a50169ca8c9cec594595aacc3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download