Overview

overview

10

Static

static

3

tmp_y4twmt8.exe

windows10-ltsc_2021-x64

10

tmp_y4twmt8.exe

windows10-2004-x64

10

tmp_y4twmt8.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    155s
  • 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, 02:55

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    tmp_y4twmt8.exe
  • Size 1016KB
  • Sample260602-dewkvsct3t
  • SHA256 f13e9a8bdf97c08930e2697bae6b69e648ba1cce905f82aef08a25bc540af67f
  • 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 5 IoCs
    persistence
  • UAC bypass 3 TTPs 14 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 33 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 10 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 file in System32 directory 39 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 39 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 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp_y4twmt8.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp_y4twmt8.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:5264
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmp_y4twmt8.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:4788
      • C:\Users\Admin\AppData\Local\Temp\osxfmn.exe
        "C:\Users\Admin\AppData\Local\Temp\osxfmn.exe" "-C:\Users\Admin\AppData\Local\Temp\aodvmxnawhbolkcw.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:5596
      • C:\Users\Admin\AppData\Local\Temp\osxfmn.exe
        "C:\Users\Admin\AppData\Local\Temp\osxfmn.exe" "-C:\Users\Admin\AppData\Local\Temp\aodvmxnawhbolkcw.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:1560
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\users\admin\appdata\local\temp\tmp_y4twmt8.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:1888
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5528
  • C:\Windows\ogzvqfzqqfduvyusthkc.exe
    ogzvqfzqqfduvyusthkc.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3772
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\ogzvqfzqqfduvyusthkc.exe*."
      2⤵
      • Executes dropped EXE
      PID:6100
  • C:\Windows\qgxrkxpecplazauqpb.exe
    qgxrkxpecplazauqpb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5364
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\qgxrkxpecplazauqpb.exe*."
      2⤵
      • Executes dropped EXE
      PID:3656
  • C:\Users\Admin\AppData\Local\Temp\qgxrkxpecplazauqpb.exe
    C:\Users\Admin\AppData\Local\Temp\qgxrkxpecplazauqpb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4268
  • C:\Windows\aodvmxnawhbolkcw.exe
    aodvmxnawhbolkcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4912
  • C:\Windows\ogzvqfzqqfduvyusthkc.exe
    ogzvqfzqqfduvyusthkc.exe
    1⤵
    • Executes dropped EXE
    PID:2236
  • C:\Users\Admin\AppData\Local\Temp\ogzvqfzqqfduvyusthkc.exe
    C:\Users\Admin\AppData\Local\Temp\ogzvqfzqqfduvyusthkc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1936
  • C:\Windows\bskfzngwvjgwwytqqdf.exe
    bskfzngwvjgwwytqqdf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1264
  • C:\Windows\hwmfxjaolxsgeexsq.exe
    hwmfxjaolxsgeexsq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5208
  • C:\Windows\dwqnjzumndcuwaxwynrke.exe
    dwqnjzumndcuwaxwynrke.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2016
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\dwqnjzumndcuwaxwynrke.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:1012
  • C:\Users\Admin\AppData\Local\Temp\aodvmxnawhbolkcw.exe
    C:\Users\Admin\AppData\Local\Temp\aodvmxnawhbolkcw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3408
  • C:\Windows\bskfzngwvjgwwytqqdf.exe
    bskfzngwvjgwwytqqdf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5320
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\bskfzngwvjgwwytqqdf.exe*."
      2⤵
      • Executes dropped EXE
      PID:5244
  • C:\Users\Admin\AppData\Local\Temp\bskfzngwvjgwwytqqdf.exe
    C:\Users\Admin\AppData\Local\Temp\bskfzngwvjgwwytqqdf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5508
  • C:\Windows\aodvmxnawhbolkcw.exe
    aodvmxnawhbolkcw.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\aodvmxnawhbolkcw.exe*."
      2⤵
      • Executes dropped EXE
      PID:5172
  • C:\Windows\hwmfxjaolxsgeexsq.exe
    hwmfxjaolxsgeexsq.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4968
    • C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
      "C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe" "c:\windows\hwmfxjaolxsgeexsq.exe*."
      2⤵
      • Executes dropped EXE
      PID:5316
  • C:\Windows\dwqnjzumndcuwaxwynrke.exe
    dwqnjzumndcuwaxwynrke.exe
    1⤵
    • Executes dropped EXE
    PID:3612
  • C:\Users\Admin\AppData\Local\Temp\dwqnjzumndcuwaxwynrke.exe
    C:\Users\Admin\AppData\Local\Temp\dwqnjzumndcuwaxwynrke.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3240
  • C:\Windows\qgxrkxpecplazauqpb.exe
    qgxrkxpecplazauqpb.exe
    1⤵
    • Executes dropped EXE
    PID:4268
  • C:\Users\Admin\AppData\Local\Temp\hwmfxjaolxsgeexsq.exe
    C:\Users\Admin\AppData\Local\Temp\hwmfxjaolxsgeexsq.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3768

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

        System Information Discovery

        2
        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

        fcabbvuqvpsoucdgmfnki.jdc
        • Path C:\Program Files (x86)\fcabbvuqvpsoucdgmfnki.jdc
        • Size 280B
        • SHA256 25fb388e3ff4a8a3876b0eaf8ec5263444b650f4905182eba9f70a3ebf643115
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        fcabbvuqvpsoucdgmfnki.jdc
        • Path C:\Program Files (x86)\fcabbvuqvpsoucdgmfnki.jdc
        • Size 280B
        • SHA256 3d4ba86b3bfbf142e4f1387be0311e7a699a4cf3e673c9e36255070cf66d0dc1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        osxfmn.exe
        • Path C:\Users\Admin\AppData\Local\Temp\osxfmn.exe
        • Size 712KB
        • SHA256 e64c82c85ec9ad7112ecd48317fae39a0cc637a10a33ddfe0f7e4dc4fc33a1a1
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        sasmzoglckc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\sasmzoglckc.exe
        • Size 320KB
        • SHA256 f89f20d1c164f3de69b4ad38f5586bf420150181489203aeabe30250d101f8a5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        airdotdkaftarkwkbfygpbmrbiydrypi.izd
        • Path C:\Users\Admin\AppData\Local\airdotdkaftarkwkbfygpbmrbiydrypi.izd
        • Size 4KB
        • SHA256 d7af5146379c759638e45230c4d4cb5bea59a7cef1b1a9b6ebe6117bfa02bef3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        fcabbvuqvpsoucdgmfnki.jdc
        • Path C:\Users\Admin\AppData\Local\fcabbvuqvpsoucdgmfnki.jdc
        • Size 280B
        • SHA256 0054509eb5c3e77073b21d46f0e8273d45619f5605270858d56efdfaf4d0d1d4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qgxrkxpecplazauqpb.exe
        • Path C:\Windows\SysWOW64\qgxrkxpecplazauqpb.exe
        • Size 1016KB
        • SHA256 f13e9a8bdf97c08930e2697bae6b69e648ba1cce905f82aef08a25bc540af67f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download