Overview

overview

10

Static

static

3

tmp66a2wtzl.exe

windows10-ltsc_2021-x64

10

tmp66a2wtzl.exe

windows10-2004-x64

10

tmp66a2wtzl.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    157s
  • 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, 14:56

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General

  • Target
    tmp66a2wtzl.exe
  • Size 556KB
  • Sample260522-sbb5daex6l
  • SHA256 4a5dc0a8527388a5a96838556e49988c8e40a511e2f8ac3b19fd7db7fecfc92c
  • 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 7 IoCs
    persistence
  • UAC bypass 3 TTPs 16 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 14 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 6 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 53 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 53 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp66a2wtzl.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp66a2wtzl.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3752
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\users\admin\appdata\local\temp\tmp66a2wtzl.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:3404
      • C:\Users\Admin\AppData\Local\Temp\bfgpp.exe
        "C:\Users\Admin\AppData\Local\Temp\bfgpp.exe" "-C:\Users\Admin\AppData\Local\Temp\ynztevtbveqzyqix.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:1532
      • C:\Users\Admin\AppData\Local\Temp\bfgpp.exe
        "C:\Users\Admin\AppData\Local\Temp\bfgpp.exe" "-C:\Users\Admin\AppData\Local\Temp\ynztevtbveqzyqix.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:4204
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\users\admin\appdata\local\temp\tmp66a2wtzl.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:2272
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4404
  • C:\Windows\mfvtidfrpcsfieatiohx.exe
    mfvtidfrpcsfieatiohx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2116
  • C:\Windows\zrgdrlmxugvhjezrfkc.exe
    zrgdrlmxugvhjezrfkc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4128
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\zrgdrlmxugvhjezrfkc.exe*."
      2⤵
      • Executes dropped EXE
      PID:2136
  • C:\Windows\fvidphgpkuhrrkdtf.exe
    fvidphgpkuhrrkdtf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2040
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\fvidphgpkuhrrkdtf.exe*."
      2⤵
      • Executes dropped EXE
      PID:784
  • C:\Users\Admin\AppData\Local\Temp\mfvtidfrpcsfieatiohx.exe
    C:\Users\Admin\AppData\Local\Temp\mfvtidfrpcsfieatiohx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3880
  • C:\Windows\oftpcvvfbmalmgarei.exe
    oftpcvvfbmalmgarei.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1336
  • C:\Windows\zrgdrlmxugvhjezrfkc.exe
    zrgdrlmxugvhjezrfkc.exe
    1⤵
    • Executes dropped EXE
    PID:1256
  • C:\Windows\oftpcvvfbmalmgarei.exe
    oftpcvvfbmalmgarei.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:776
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\oftpcvvfbmalmgarei.exe*."
      2⤵
      • Executes dropped EXE
      PID:1204
  • C:\Users\Admin\AppData\Local\Temp\bvmlbxanmarfjgdxnuofe.exe
    C:\Users\Admin\AppData\Local\Temp\bvmlbxanmarfjgdxnuofe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4708
  • C:\Users\Admin\AppData\Local\Temp\oftpcvvfbmalmgarei.exe
    C:\Users\Admin\AppData\Local\Temp\oftpcvvfbmalmgarei.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2376
  • C:\Windows\ynztevtbveqzyqix.exe
    ynztevtbveqzyqix.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2588
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\ynztevtbveqzyqix.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:3744
  • C:\Windows\ynztevtbveqzyqix.exe
    ynztevtbveqzyqix.exe
    1⤵
    • Executes dropped EXE
    PID:3880
  • C:\Windows\bvmlbxanmarfjgdxnuofe.exe
    bvmlbxanmarfjgdxnuofe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4616
  • C:\Users\Admin\AppData\Local\Temp\fvidphgpkuhrrkdtf.exe
    C:\Users\Admin\AppData\Local\Temp\fvidphgpkuhrrkdtf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1184
  • C:\Windows\bvmlbxanmarfjgdxnuofe.exe
    bvmlbxanmarfjgdxnuofe.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4116
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\bvmlbxanmarfjgdxnuofe.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:4996
  • C:\Windows\fvidphgpkuhrrkdtf.exe
    fvidphgpkuhrrkdtf.exe
    1⤵
    • Executes dropped EXE
    PID:1280
  • C:\Users\Admin\AppData\Local\Temp\ynztevtbveqzyqix.exe
    C:\Users\Admin\AppData\Local\Temp\ynztevtbveqzyqix.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1384
  • C:\Windows\mfvtidfrpcsfieatiohx.exe
    mfvtidfrpcsfieatiohx.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2288
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\mfvtidfrpcsfieatiohx.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:1224
  • C:\Users\Admin\AppData\Local\Temp\zrgdrlmxugvhjezrfkc.exe
    C:\Users\Admin\AppData\Local\Temp\zrgdrlmxugvhjezrfkc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:728

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

        Query Registry

        1
        T1012

        System Information Discovery

        3
        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

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        Downloads

        cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Path C:\Program Files (x86)\cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Size 272B
        • SHA256 150d10668bfcdf529f2385ee474b7009bc17105c17f181fbcba0656c79d4d6df
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Path C:\Program Files (x86)\cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Size 272B
        • SHA256 804983a5e0c686640f7f1713f0bab3346431cbfc269e82741103e22bbd17ceb4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Path C:\Program Files (x86)\cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Size 272B
        • SHA256 8bd17fdd5e6dc2aee18e55d5c44fffe6a8abbaea9f581d6c03864c0b4ec4ac5b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        bfgpp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bfgpp.exe
        • Size 736KB
        • SHA256 4801c5f0e64285c84b0bd12a3e8875c706b4e1e6367f7971da669fc0f0e3031c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        lswqdqagvcg.exe
        • Path C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
        • Size 320KB
        • SHA256 0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Path C:\Users\Admin\AppData\Local\cbxbwxfxbuqjsuwvqcbxbw.fxb
        • Size 272B
        • SHA256 765aa07291ed38a1c3fd6f0774bcd0f5b13247cadc3359096d6a71f467200efe
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tdkzfrkncgnrlylvbyipekwpshlswqdqa.dnu
        • Path C:\Users\Admin\AppData\Local\tdkzfrkncgnrlylvbyipekwpshlswqdqa.dnu
        • Size 3KB
        • SHA256 7a7c5b019f88c74c9bd1e7cdeea9f97cd10c602c804e639dc3c61dfe905c329b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        oftpcvvfbmalmgarei.exe
        • Path C:\Windows\SysWOW64\oftpcvvfbmalmgarei.exe
        • Size 556KB
        • SHA256 4a5dc0a8527388a5a96838556e49988c8e40a511e2f8ac3b19fd7db7fecfc92c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ovzloxnn.bat
        • Path C:\ovzloxnn.bat
        • Size 532KB
        • SHA256 05ce2746ea9657fa0629d82ab45b21562d701a6a9040985019ba6b2b551e69f2
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download