Overview

overview

10

Static

static

3

tmpnjuz9f_o.exe

windows10-ltsc_2021-x64

10

tmpnjuz9f_o.exe

windows10-2004-x64

10

tmpnjuz9f_o.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • 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, 02:57

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General

  • Target
    tmpnjuz9f_o.exe
  • Size 1016KB
  • Sample260602-dflgaadx2p
  • SHA256 f937d199612f75f129b1b8ffe0cbcb58cecd5b2b8975be1e0a1cfb4ea484e729
  • 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 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\tmpnjuz9f_o.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpnjuz9f_o.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4584
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\users\admin\appdata\local\temp\tmpnjuz9f_o.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:2208
      • C:\Users\Admin\AppData\Local\Temp\xgjschq.exe
        "C:\Users\Admin\AppData\Local\Temp\xgjschq.exe" "-C:\Users\Admin\AppData\Local\Temp\woaslzresljapdsd.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:4388
      • C:\Users\Admin\AppData\Local\Temp\xgjschq.exe
        "C:\Users\Admin\AppData\Local\Temp\xgjschq.exe" "-C:\Users\Admin\AppData\Local\Temp\woaslzresljapdsd.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:4972
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\users\admin\appdata\local\temp\tmpnjuz9f_o.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:4944
  • C:\Windows\dwjcwleshbasixnzk.exe
    dwjcwleshbasixnzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3192
  • C:\Windows\mguojztiyttmdtkxjg.exe
    mguojztiyttmdtkxjg.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3612
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\windows\mguojztiyttmdtkxjg.exe*."
      2⤵
      • Executes dropped EXE
      PID:3288
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1996
  • C:\Windows\mguojztiyttmdtkxjg.exe
    mguojztiyttmdtkxjg.exe
    1⤵
    • Executes dropped EXE
    PID:644
  • C:\Users\Admin\AppData\Local\Temp\kgwsphdumjlgzrkznmiy.exe
    C:\Users\Admin\AppData\Local\Temp\kgwsphdumjlgzrkznmiy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2080
  • C:\Windows\xshcypkarnoiarjxkid.exe
    xshcypkarnoiarjxkid.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2604
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\windows\xshcypkarnoiarjxkid.exe*."
      2⤵
      • Executes dropped EXE
      PID:1500
  • C:\Users\Admin\AppData\Local\Temp\woaslzresljapdsd.exe
    C:\Users\Admin\AppData\Local\Temp\woaslzresljapdsd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4436
  • C:\Windows\dwjcwleshbasixnzk.exe
    dwjcwleshbasixnzk.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4152
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\windows\dwjcwleshbasixnzk.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:4608
  • C:\Windows\zwnkibyqjhkgatndsspgd.exe
    zwnkibyqjhkgatndsspgd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4020
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\windows\zwnkibyqjhkgatndsspgd.exe*."
      2⤵
      • Executes dropped EXE
      PID:1720
  • C:\Users\Admin\AppData\Local\Temp\dwjcwleshbasixnzk.exe
    C:\Users\Admin\AppData\Local\Temp\dwjcwleshbasixnzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3960
  • C:\Windows\xshcypkarnoiarjxkid.exe
    xshcypkarnoiarjxkid.exe
    1⤵
    • Executes dropped EXE
    PID:4468
  • C:\Users\Admin\AppData\Local\Temp\zwnkibyqjhkgatndsspgd.exe
    C:\Users\Admin\AppData\Local\Temp\zwnkibyqjhkgatndsspgd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4156
  • C:\Windows\woaslzresljapdsd.exe
    woaslzresljapdsd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3224
  • C:\Users\Admin\AppData\Local\Temp\mguojztiyttmdtkxjg.exe
    C:\Users\Admin\AppData\Local\Temp\mguojztiyttmdtkxjg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:408
  • C:\Windows\kgwsphdumjlgzrkznmiy.exe
    kgwsphdumjlgzrkznmiy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:228
  • C:\Windows\kgwsphdumjlgzrkznmiy.exe
    kgwsphdumjlgzrkznmiy.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4028
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\windows\kgwsphdumjlgzrkznmiy.exe*."
      2⤵
      • Executes dropped EXE
      PID:4060
  • C:\Windows\woaslzresljapdsd.exe
    woaslzresljapdsd.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2904
    • C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
      "C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe" "c:\windows\woaslzresljapdsd.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:4712
  • C:\Windows\zwnkibyqjhkgatndsspgd.exe
    zwnkibyqjhkgatndsspgd.exe
    1⤵
    • Executes dropped EXE
    PID:4912
  • C:\Users\Admin\AppData\Local\Temp\xshcypkarnoiarjxkid.exe
    C:\Users\Admin\AppData\Local\Temp\xshcypkarnoiarjxkid.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1548

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

        bcxyaxyurtaayvtngklgh.ghd
        • Path C:\Program Files (x86)\bcxyaxyurtaayvtngklgh.ghd
        • Size 280B
        • SHA256 64e6c4c5f27c97f57220e02339c2d807e7f9f65cfbfa7c0cd2b03b1d443c6430
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bcxyaxyurtaayvtngklgh.ghd
        • Path C:\Program Files (x86)\bcxyaxyurtaayvtngklgh.ghd
        • Size 280B
        • SHA256 cd2934e562fc31d5dd65dbfc44d90b227834e761b825541781cf4edba10a4305
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        slxhqaglcvh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\slxhqaglcvh.exe
        • Size 320KB
        • SHA256 6bc10568b77fa95d3108dcff310c9e178b63aa66adf9fbe54eddcb676a84533c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        xgjschq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\xgjschq.exe
        • Size 720KB
        • SHA256 ef663390626e47488d37dd227d92ac9b4a80382f31a5b092e8707059fa353c3f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        bcxyaxyurtaayvtngklgh.ghd
        • Path C:\Users\Admin\AppData\Local\bcxyaxyurtaayvtngklgh.ghd
        • Size 280B
        • SHA256 b17a737cd0700b0bd48f87efa8129cd5a4a558148de6fb10cf5d9c5cfae12a73
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wioanvhowjbmvdmrvkwcobjvckxpajra.jyk
        • Path C:\Users\Admin\AppData\Local\wioanvhowjbmvdmrvkwcobjvckxpajra.jyk
        • Size 4KB
        • SHA256 2f95be8364d4e37e152775fec41429c587c3c5e61170481549ef0b8fd2965104
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mguojztiyttmdtkxjg.exe
        • Path C:\Windows\SysWOW64\mguojztiyttmdtkxjg.exe
        • Size 1016KB
        • SHA256 f937d199612f75f129b1b8ffe0cbcb58cecd5b2b8975be1e0a1cfb4ea484e729
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download