Overview

overview

10

Static

static

3

tmpv4c9m3lz.exe

windows10-ltsc_2021-x64

10

tmpv4c9m3lz.exe

windows10-2004-x64

10

tmpv4c9m3lz.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    22/05/2026, 15:12

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General

  • Target
    tmpv4c9m3lz.exe
  • Size 1016KB
  • Sample260522-sllrkahw21
  • SHA256 19bfc62f4162a8399e6c22f14721710d96007e027aaa8154e3d80bb725c360e4
  • 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 36 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 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\tmpv4c9m3lz.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpv4c9m3lz.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\users\admin\appdata\local\temp\tmpv4c9m3lz.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:1044
      • C:\Users\Admin\AppData\Local\Temp\gobgnm.exe
        "C:\Users\Admin\AppData\Local\Temp\gobgnm.exe" "-C:\Users\Admin\AppData\Local\Temp\skhwnwmfxjvvlibq.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:2036
      • C:\Users\Admin\AppData\Local\Temp\gobgnm.exe
        "C:\Users\Admin\AppData\Local\Temp\gobgnm.exe" "-C:\Users\Admin\AppData\Local\Temp\skhwnwmfxjvvlibq.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:1792
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\users\admin\appdata\local\temp\tmpv4c9m3lz.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:2628
  • C:\Windows\skhwnwmfxjvvlibq.exe
    skhwnwmfxjvvlibq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1520
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4636
  • C:\Windows\skhwnwmfxjvvlibq.exe
    skhwnwmfxjvvlibq.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\skhwnwmfxjvvlibq.exe*."
      2⤵
      • Executes dropped EXE
      PID:4484
  • C:\Windows\zsqgyiztmzmnecwmj.exe
    zsqgyiztmzmnecwmj.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3828
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\zsqgyiztmzmnecwmj.exe*."
      2⤵
      • Executes dropped EXE
      PID:4376
  • C:\Windows\toogamfbwladwwskjsx.exe
    toogamfbwladwwskjsx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3720
  • C:\Users\Admin\AppData\Local\Temp\toogamfbwladwwskjsx.exe
    C:\Users\Admin\AppData\Local\Temp\toogamfbwladwwskjsx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1628
  • C:\Users\Admin\AppData\Local\Temp\gcdwreyvrhxbvwtmmwcy.exe
    C:\Users\Admin\AppData\Local\Temp\gcdwreyvrhxbvwtmmwcy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3256
  • C:\Windows\vsuokytrofwbwywqrcjgi.exe
    vsuokytrofwbwywqrcjgi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3844
  • C:\Windows\icbslwojdrfhzytkiq.exe
    icbslwojdrfhzytkiq.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1748
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\icbslwojdrfhzytkiq.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:4928
  • C:\Windows\icbslwojdrfhzytkiq.exe
    icbslwojdrfhzytkiq.exe
    1⤵
    • Executes dropped EXE
    PID:1932
  • C:\Windows\toogamfbwladwwskjsx.exe
    toogamfbwladwwskjsx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\toogamfbwladwwskjsx.exe*."
      2⤵
      • Executes dropped EXE
      PID:3368
  • C:\Users\Admin\AppData\Local\Temp\skhwnwmfxjvvlibq.exe
    C:\Users\Admin\AppData\Local\Temp\skhwnwmfxjvvlibq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:540
  • C:\Users\Admin\AppData\Local\Temp\vsuokytrofwbwywqrcjgi.exe
    C:\Users\Admin\AppData\Local\Temp\vsuokytrofwbwywqrcjgi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:656
  • C:\Windows\zsqgyiztmzmnecwmj.exe
    zsqgyiztmzmnecwmj.exe
    1⤵
    • Executes dropped EXE
    PID:3824
  • C:\Windows\gcdwreyvrhxbvwtmmwcy.exe
    gcdwreyvrhxbvwtmmwcy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1320
  • C:\Users\Admin\AppData\Local\Temp\zsqgyiztmzmnecwmj.exe
    C:\Users\Admin\AppData\Local\Temp\zsqgyiztmzmnecwmj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1360
  • C:\Windows\gcdwreyvrhxbvwtmmwcy.exe
    gcdwreyvrhxbvwtmmwcy.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\gcdwreyvrhxbvwtmmwcy.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:4812
  • C:\Windows\vsuokytrofwbwywqrcjgi.exe
    vsuokytrofwbwywqrcjgi.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3476
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\vsuokytrofwbwywqrcjgi.exe*."
      2⤵
      • Executes dropped EXE
      PID:1080
  • C:\Users\Admin\AppData\Local\Temp\icbslwojdrfhzytkiq.exe
    C:\Users\Admin\AppData\Local\Temp\icbslwojdrfhzytkiq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4620

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

        gobgnm.exe
        • Path C:\Users\Admin\AppData\Local\Temp\gobgnm.exe
        • Size 720KB
        • SHA256 db03f0147ae72b31f380aa2c057ede5fbd3580c8652f3990013b8302942de577
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mhskyizawrc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
        • Size 320KB
        • SHA256 7cc0205fc50646f4cdbd24f455c4546fc14e241be6816c89369d8ec7df212263
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        aenormotxvtfhqvwewkoxybw.dhf
        • Path C:\Users\Admin\AppData\Local\aenormotxvtfhqvwewkoxybw.dhf
        • Size 280B
        • SHA256 1067dc99c149d2a3285f103a887f1dff817434ad2e9bb249817b877b2782ecb9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        jysesylbqzifsmcohkjysesylbqzifsmcoh.jys
        • Path C:\Users\Admin\AppData\Local\jysesylbqzifsmcohkjysesylbqzifsmcoh.jys
        • Size 4KB
        • SHA256 701b97e9dfdee8ab0b6a6433a721052944873f420583ead3c21f6a5bd3be068e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        icbslwojdrfhzytkiq.exe
        • Path C:\Windows\SysWOW64\icbslwojdrfhzytkiq.exe
        • Size 1016KB
        • SHA256 19bfc62f4162a8399e6c22f14721710d96007e027aaa8154e3d80bb725c360e4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download