Overview

overview

10

Static

static

3

tmpybvsv0s1.exe

windows10-ltsc_2021-x64

10

tmpybvsv0s1.exe

windows10-2004-x64

10

tmpybvsv0s1.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • 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, 02:44

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General

  • Target
    tmpybvsv0s1.exe
  • Size 548KB
  • Sample260602-c8a1kscs2s
  • SHA256 3a801906af230c0578e40c4ee18f2fe76ec90085acfc14c1fc95cb0b33b6ac54
  • 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 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 17 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\tmpybvsv0s1.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpybvsv0s1.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1440
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\users\admin\appdata\local\temp\tmpybvsv0s1.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:1344
      • C:\Users\Admin\AppData\Local\Temp\dbokq.exe
        "C:\Users\Admin\AppData\Local\Temp\dbokq.exe" "-C:\Users\Admin\AppData\Local\Temp\ajhofwrjsircqeah.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:4308
      • C:\Users\Admin\AppData\Local\Temp\dbokq.exe
        "C:\Users\Admin\AppData\Local\Temp\dbokq.exe" "-C:\Users\Admin\AppData\Local\Temp\ajhofwrjsircqeah.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:60
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\users\admin\appdata\local\temp\tmpybvsv0s1.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:3324
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:204
  • C:\Windows\obdojedzmgtiassddqkx.exe
    obdojedzmgtiassddqkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4024
  • C:\Windows\drugcyyvjesibuvhiwrfi.exe
    drugcyyvjesibuvhiwrfi.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3936
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\drugcyyvjesibuvhiwrfi.exe*."
      2⤵
      • Executes dropped EXE
      PID:4904
  • C:\Windows\bnoysmkfrkwkbsrbamf.exe
    bnoysmkfrkwkbsrbamf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:960
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\bnoysmkfrkwkbsrbamf.exe*."
      2⤵
      • Executes dropped EXE
      PID:4780
  • C:\Windows\drugcyyvjesibuvhiwrfi.exe
    drugcyyvjesibuvhiwrfi.exe
    1⤵
    • Executes dropped EXE
    PID:2912
  • C:\Users\Admin\AppData\Local\Temp\obdojedzmgtiassddqkx.exe
    C:\Users\Admin\AppData\Local\Temp\obdojedzmgtiassddqkx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4264
  • C:\Users\Admin\AppData\Local\Temp\qbbkdwtnyqboeusbzk.exe
    C:\Users\Admin\AppData\Local\Temp\qbbkdwtnyqboeusbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2112
  • C:\Users\Admin\AppData\Local\Temp\hrqyqiexhyiujyvda.exe
    C:\Users\Admin\AppData\Local\Temp\hrqyqiexhyiujyvda.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2972
  • C:\Windows\qbbkdwtnyqboeusbzk.exe
    qbbkdwtnyqboeusbzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1120
  • C:\Windows\qbbkdwtnyqboeusbzk.exe
    qbbkdwtnyqboeusbzk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2812
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\qbbkdwtnyqboeusbzk.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:1168
  • C:\Users\Admin\AppData\Local\Temp\ajhofwrjsircqeah.exe
    C:\Users\Admin\AppData\Local\Temp\ajhofwrjsircqeah.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2784
  • C:\Windows\hrqyqiexhyiujyvda.exe
    hrqyqiexhyiujyvda.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3252
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\hrqyqiexhyiujyvda.exe*."
      2⤵
      • Executes dropped EXE
      PID:4032
  • C:\Windows\bnoysmkfrkwkbsrbamf.exe
    bnoysmkfrkwkbsrbamf.exe
    1⤵
    • Executes dropped EXE
    PID:4420
  • C:\Windows\ajhofwrjsircqeah.exe
    ajhofwrjsircqeah.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4608
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\ajhofwrjsircqeah.exe*."
      2⤵
      • Executes dropped EXE
      PID:1144
  • C:\Windows\ajhofwrjsircqeah.exe
    ajhofwrjsircqeah.exe
    1⤵
    • Executes dropped EXE
    PID:1488
  • C:\Windows\obdojedzmgtiassddqkx.exe
    obdojedzmgtiassddqkx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2444
    • C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
      "C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe" "c:\windows\obdojedzmgtiassddqkx.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:824
  • C:\Windows\hrqyqiexhyiujyvda.exe
    hrqyqiexhyiujyvda.exe
    1⤵
    • Executes dropped EXE
    PID:3704
  • C:\Users\Admin\AppData\Local\Temp\bnoysmkfrkwkbsrbamf.exe
    C:\Users\Admin\AppData\Local\Temp\bnoysmkfrkwkbsrbamf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3500
  • C:\Users\Admin\AppData\Local\Temp\drugcyyvjesibuvhiwrfi.exe
    C:\Users\Admin\AppData\Local\Temp\drugcyyvjesibuvhiwrfi.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3712

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

        dbokq.exe
        • Path C:\Users\Admin\AppData\Local\Temp\dbokq.exe
        • Size 712KB
        • SHA256 f635a6c01a5b7de28d5753ce78c0d23d442c4896daf7155dc1a950be8dd0f42a
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ioxgxzqusyh.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ioxgxzqusyh.exe
        • Size 320KB
        • SHA256 2be5d80de2a1162bb4f054149fdce4ef5ee4d21ded65d0fcfc7a2f18849a69a4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ajhofwrjsircqeahdmcljqhytluktesgcjfoen.sja
        • Path C:\Users\Admin\AppData\Local\ajhofwrjsircqeahdmcljqhytluktesgcjfoen.sja
        • Size 4KB
        • SHA256 7b314c4d549ce98732ac0fec82a8828f6ed5f7356f46c7a274e84216bb250106
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        dbokqwgnlqoorufbmkpnawciszx.aad
        • Path C:\Users\Admin\AppData\Local\dbokqwgnlqoorufbmkpnawciszx.aad
        • Size 280B
        • SHA256 324f2bba7d59d175e82d033f8d770f717f7667aa3abe33c9fe9a7510df5e3b19
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        qbbkdwtnyqboeusbzk.exe
        • Path C:\Windows\SysWOW64\qbbkdwtnyqboeusbzk.exe
        • Size 548KB
        • SHA256 3a801906af230c0578e40c4ee18f2fe76ec90085acfc14c1fc95cb0b33b6ac54
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download