Overview

overview

10

Static

static

3

tmp59f736d0.exe

windows10-ltsc_2021-x64

10

tmp59f736d0.exe

windows10-2004-x64

10

tmp59f736d0.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    162s
  • 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, 03:28

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General

  • Target
    tmp59f736d0.exe
  • Size 464KB
  • Sample260602-d1cd4ses5m
  • SHA256 332a36217af84582eb0f36d841976508c1ccb7fcd638e90684d50b5763b9f617
  • 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 33 IoCs
    persistence
  • Disables RegEdit via registry modification 9 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 7 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 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\tmp59f736d0.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp59f736d0.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:6080
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmp59f736d0.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:3188
      • C:\Users\Admin\AppData\Local\Temp\mqsgnp.exe
        "C:\Users\Admin\AppData\Local\Temp\mqsgnp.exe" "-c:\users\admin\appdata\local\temp\tmp59f736d0.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:3436
      • C:\Users\Admin\AppData\Local\Temp\mqsgnp.exe
        "C:\Users\Admin\AppData\Local\Temp\mqsgnp.exe" "-c:\users\admin\appdata\local\temp\tmp59f736d0.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:5312
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\users\admin\appdata\local\temp\tmp59f736d0.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:5824
  • C:\Windows\oesslzpfcpovlovnff.exe
    oesslzpfcpovlovnff.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3472
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\oesslzpfcpovlovnff.exe*."
      2⤵
      • Executes dropped EXE
      PID:5720
  • C:\Users\Admin\AppData\Local\Temp\oesslzpfcpovlovnff.exe
    C:\Users\Admin\AppData\Local\Temp\oesslzpfcpovlovnff.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2916
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1088
  • C:\Windows\bulokbunndfpioytorpiz.exe
    bulokbunndfpioytorpiz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1640
  • C:\Windows\fuhgylaplxvbqsypg.exe
    fuhgylaplxvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3992
  • C:\Windows\meuwrhzrqfgphmvpjlia.exe
    meuwrhzrqfgphmvpjlia.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\meuwrhzrqfgphmvpjlia.exe*."
      2⤵
      • Executes dropped EXE
      PID:1892
  • C:\Windows\ymywnznbwhejxydt.exe
    ymywnznbwhejxydt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5980
  • C:\Windows\zqfgapgxvjjrimunghd.exe
    zqfgapgxvjjrimunghd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5908
  • C:\Windows\ymywnznbwhejxydt.exe
    ymywnznbwhejxydt.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5904
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\ymywnznbwhejxydt.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3228
  • C:\Windows\bulokbunndfpioytorpiz.exe
    bulokbunndfpioytorpiz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1552
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\bulokbunndfpioytorpiz.exe*."
      2⤵
      • Executes dropped EXE
      PID:1868
  • C:\Users\Admin\AppData\Local\Temp\fuhgylaplxvbqsypg.exe
    C:\Users\Admin\AppData\Local\Temp\fuhgylaplxvbqsypg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2544
  • C:\Users\Admin\AppData\Local\Temp\ymywnznbwhejxydt.exe
    C:\Users\Admin\AppData\Local\Temp\ymywnznbwhejxydt.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4168
  • C:\Windows\oesslzpfcpovlovnff.exe
    oesslzpfcpovlovnff.exe
    1⤵
    • Executes dropped EXE
    PID:4164
  • C:\Windows\fuhgylaplxvbqsypg.exe
    fuhgylaplxvbqsypg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4148
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\fuhgylaplxvbqsypg.exe*."
      2⤵
      • Executes dropped EXE
      PID:1280
  • C:\Users\Admin\AppData\Local\Temp\meuwrhzrqfgphmvpjlia.exe
    C:\Users\Admin\AppData\Local\Temp\meuwrhzrqfgphmvpjlia.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5832
  • C:\Windows\meuwrhzrqfgphmvpjlia.exe
    meuwrhzrqfgphmvpjlia.exe
    1⤵
    • Executes dropped EXE
    PID:540
  • C:\Users\Admin\AppData\Local\Temp\bulokbunndfpioytorpiz.exe
    C:\Users\Admin\AppData\Local\Temp\bulokbunndfpioytorpiz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1252
  • C:\Windows\zqfgapgxvjjrimunghd.exe
    zqfgapgxvjjrimunghd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3536
    • C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe
      "C:\Users\Admin\AppData\Local\Temp\vveaalwpffo.exe" "c:\windows\zqfgapgxvjjrimunghd.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:5688
  • C:\Users\Admin\AppData\Local\Temp\zqfgapgxvjjrimunghd.exe
    C:\Users\Admin\AppData\Local\Temp\zqfgapgxvjjrimunghd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2944

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

        befsyzcfppbvyoinsfnqreklorb.nhk
        • Path C:\Program Files (x86)\befsyzcfppbvyoinsfnqreklorb.nhk
        • Size 272B
        • SHA256 c296fbcbac71124d456a74d18caf9bd23246e981bab661ac0e044becc15282a8
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        befsyzcfppbvyoinsfnqreklorb.nhk
        • Path C:\Program Files (x86)\befsyzcfppbvyoinsfnqreklorb.nhk
        • Size 272B
        • SHA256 2375f43d48a0232b32aaddf94973e500cda1eae318f6e3dd90fdd9da07146e27
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        mqsgnp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mqsgnp.exe
        • Size 728KB
        • SHA256 96d648ecc6e90103929d351c440ca656f26c99554e43b5125e4fb7175abcf776
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        befsyzcfppbvyoinsfnqreklorb.nhk
        • Path C:\Users\Admin\AppData\Local\befsyzcfppbvyoinsfnqreklorb.nhk
        • Size 272B
        • SHA256 72cc5baccab312e239da0a5d53f94aa3b87970a97c43e5b7d39c9afa068ac364
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ymywnznbwhejxydtjhaoaypbpdyjglzafvljcq.ard
        • Path C:\Users\Admin\AppData\Local\ymywnznbwhejxydtjhaoaypbpdyjglzafvljcq.ard
        • Size 3KB
        • SHA256 61e595e02f13294e6f37eb5d790d3cf1ca644b05e463f51494aea4347ae18fed
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        oesslzpfcpovlovnff.exe
        • Path C:\Windows\SysWOW64\oesslzpfcpovlovnff.exe
        • Size 464KB
        • SHA256 332a36217af84582eb0f36d841976508c1ccb7fcd638e90684d50b5763b9f617
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        tcjcovendjb.bat
        • Path C:\tcjcovendjb.bat
        • Size 556KB
        • SHA256 fbcd7a3f59084091afe913516e17a6ac562e83f3268ba54acf2fabb3c1cd2026
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download