Overview

overview

10

Static

static

3

tmpkeznofoz.exe

windows10-ltsc_2021-x64

10

tmpkeznofoz.exe

windows10-2004-x64

10

tmpkeznofoz.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    154s
  • 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, 14:11

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General

  • Target
    tmpkeznofoz.exe
  • Size 1016KB
  • Sample260522-rhb8aadv3r
  • SHA256 8a3725ef19fa5684dca253f2648f166970b90963ac8ecf9b805974abdec1ec18
  • 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 35 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 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 19 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\tmpkeznofoz.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpkeznofoz.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:748
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmpkeznofoz.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:1264
      • C:\Users\Admin\AppData\Local\Temp\vfhqehj.exe
        "C:\Users\Admin\AppData\Local\Temp\vfhqehj.exe" "-C:\Users\Admin\AppData\Local\Temp\unyqnzkjqkmvqtxc.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:2012
      • C:\Users\Admin\AppData\Local\Temp\vfhqehj.exe
        "C:\Users\Admin\AppData\Local\Temp\vfhqehj.exe" "-C:\Users\Admin\AppData\Local\Temp\unyqnzkjqkmvqtxc.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:4092
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\users\admin\appdata\local\temp\tmpkeznofoz.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:2976
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2532
  • C:\Users\Admin\AppData\Local\Temp\unyqnzkjqkmvqtxc.exe
    C:\Users\Admin\AppData\Local\Temp\unyqnzkjqkmvqtxc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:584
  • C:\Windows\unyqnzkjqkmvqtxc.exe
    unyqnzkjqkmvqtxc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3472
  • C:\Windows\ifuqrhwzkiobahpyoleb.exe
    ifuqrhwzkiobahpyoleb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4220
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\ifuqrhwzkiobahpyoleb.exe*."
      2⤵
      • Executes dropped EXE
      PID:3900
  • C:\Windows\vrfaapdfpmrdbhowlhz.exe
    vrfaapdfpmrdbhowlhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4980
  • C:\Windows\ifuqrhwzkiobahpyoleb.exe
    ifuqrhwzkiobahpyoleb.exe
    1⤵
    • Executes dropped EXE
    PID:3440
  • C:\Windows\bvhaylxxfadnjnsyl.exe
    bvhaylxxfadnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3512
  • C:\Windows\kfsmlzmnwswhejpwkf.exe
    kfsmlzmnwswhejpwkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3996
  • C:\Windows\xvlikbrvhgnbbjsctrljz.exe
    xvlikbrvhgnbbjsctrljz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1844
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\xvlikbrvhgnbbjsctrljz.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:1396
  • C:\Users\Admin\AppData\Local\Temp\ifuqrhwzkiobahpyoleb.exe
    C:\Users\Admin\AppData\Local\Temp\ifuqrhwzkiobahpyoleb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3940
  • C:\Windows\vrfaapdfpmrdbhowlhz.exe
    vrfaapdfpmrdbhowlhz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2164
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\vrfaapdfpmrdbhowlhz.exe*."
      2⤵
      • Executes dropped EXE
      PID:2248
  • C:\Windows\bvhaylxxfadnjnsyl.exe
    bvhaylxxfadnjnsyl.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2716
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\bvhaylxxfadnjnsyl.exe*."
      2⤵
      • Executes dropped EXE
      PID:4932
  • C:\Users\Admin\AppData\Local\Temp\kfsmlzmnwswhejpwkf.exe
    C:\Users\Admin\AppData\Local\Temp\kfsmlzmnwswhejpwkf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5104
  • C:\Users\Admin\AppData\Local\Temp\vrfaapdfpmrdbhowlhz.exe
    C:\Users\Admin\AppData\Local\Temp\vrfaapdfpmrdbhowlhz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:384
  • C:\Users\Admin\AppData\Local\Temp\bvhaylxxfadnjnsyl.exe
    C:\Users\Admin\AppData\Local\Temp\bvhaylxxfadnjnsyl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3628
  • C:\Windows\xvlikbrvhgnbbjsctrljz.exe
    xvlikbrvhgnbbjsctrljz.exe
    1⤵
    • Executes dropped EXE
    PID:2276
  • C:\Users\Admin\AppData\Local\Temp\xvlikbrvhgnbbjsctrljz.exe
    C:\Users\Admin\AppData\Local\Temp\xvlikbrvhgnbbjsctrljz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3376
  • C:\Windows\unyqnzkjqkmvqtxc.exe
    unyqnzkjqkmvqtxc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4608
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\unyqnzkjqkmvqtxc.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:3804
  • C:\Windows\kfsmlzmnwswhejpwkf.exe
    kfsmlzmnwswhejpwkf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
      "C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe" "c:\windows\kfsmlzmnwswhejpwkf.exe*."
      2⤵
      • Executes dropped EXE
      PID:2492

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

        System Information Discovery

        2
        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

        hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Path C:\Program Files (x86)\hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Size 280B
        • SHA256 e624aff736ad9b207d35dd0277d37a1406853184445d827e5585c4ee6bae780a
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Path C:\Program Files (x86)\hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Size 280B
        • SHA256 183f61b31c5d857ae3a9e641ee8a8c04436de1fe1247e4a5f439de296fc5edd8
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Path C:\Program Files (x86)\hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Size 280B
        • SHA256 406f8f0a347cca7a0e78099402265d2d0c9bb3a531d6c0a683f84d9819ac047f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        dhxvuubpnrh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dhxvuubpnrh.exe
        • Size 320KB
        • SHA256 3d06b68d5bff0ceb4783c3fd744c3d3f0d2098d5bce6f8f769580bb16ceabd5a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vfhqehj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\vfhqehj.exe
        • Size 696KB
        • SHA256 1f5ae4d0b8f7fdafb3cf974425d8052d693f0acd761194daa6336a65b68f3cd9
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Path C:\Users\Admin\AppData\Local\hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Size 280B
        • SHA256 36189c5f9b9f2df0b69308071eb07852bb40fbfdaf7ee436f80a3e4a0de080ec
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Path C:\Users\Admin\AppData\Local\hnlqazxjdkzvdtkcbhjpnscbz.fmb
        • Size 280B
        • SHA256 22568603641e2e8d6fe4898e2252b80cc387bebc3034259a14524145e9048d24
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        mdmcxhqnskkrklnqareveupzifkccjcdfisj.nwm
        • Path C:\Users\Admin\AppData\Local\mdmcxhqnskkrklnqareveupzifkccjcdfisj.nwm
        • Size 4KB
        • SHA256 2211e28e1b811a4aa0860c991dfa0e6f3c4521b9c83fcf5d30c6d286c4aaee29
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        kfsmlzmnwswhejpwkf.exe
        • Path C:\Windows\SysWOW64\kfsmlzmnwswhejpwkf.exe
        • Size 1016KB
        • SHA256 8a3725ef19fa5684dca253f2648f166970b90963ac8ecf9b805974abdec1ec18
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download