Overview

overview

10

Static

static

3

tmpq3wfd43w.exe

windows10-ltsc_2021-x64

10

tmpq3wfd43w.exe

windows10-2004-x64

10

tmpq3wfd43w.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260513-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    22/05/2026, 14:45

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General

  • Target
    tmpq3wfd43w.exe
  • Size 1016KB
  • Sample260522-r4845set8r
  • SHA256 4ead061ce77e00a73922495a1c9298df7913b866deb7d80ddc8d5f35b6a55763
  • 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 39 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 7 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 9 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 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 44 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmpq3wfd43w.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpq3wfd43w.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4792
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\users\admin\appdata\local\temp\tmpq3wfd43w.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:5004
      • C:\Users\Admin\AppData\Local\Temp\afnot.exe
        "C:\Users\Admin\AppData\Local\Temp\afnot.exe" "-C:\Users\Admin\AppData\Local\Temp\xngsiupbulumzdhw.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:4100
      • C:\Users\Admin\AppData\Local\Temp\afnot.exe
        "C:\Users\Admin\AppData\Local\Temp\afnot.exe" "-C:\Users\Admin\AppData\Local\Temp\xngsiupbulumzdhw.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:3052
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\users\admin\appdata\local\temp\tmpq3wfd43w.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:5856
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:5744
  • C:\Windows\lfcsmcbrojwsjrzsonhe.exe
    lfcsmcbrojwsjrzsonhe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:6004
  • C:\Windows\xngsiupbulumzdhw.exe
    xngsiupbulumzdhw.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4996
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\xngsiupbulumzdhw.exe*."
      2⤵
      • Executes dropped EXE
      PID:3896
  • C:\Windows\xngsiupbulumzdhw.exe
    xngsiupbulumzdhw.exe
    1⤵
    • Executes dropped EXE
    PID:404
  • C:\Users\Admin\AppData\Local\Temp\nfaogurfateyntzqkh.exe
    C:\Users\Admin\AppData\Local\Temp\nfaogurfateyntzqkh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:452
  • C:\Windows\nfaogurfateyntzqkh.exe
    nfaogurfateyntzqkh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5000
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\nfaogurfateyntzqkh.exe*."
      2⤵
      • Executes dropped EXE
      PID:5548
  • C:\Users\Admin\AppData\Local\Temp\avtkfwwnlhvsktcwttomd.exe
    C:\Users\Admin\AppData\Local\Temp\avtkfwwnlhvsktcwttomd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4508
  • C:\Windows\yrncvkixtnzukryqljc.exe
    yrncvkixtnzukryqljc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2996
  • C:\Windows\lfcsmcbrojwsjrzsonhe.exe
    lfcsmcbrojwsjrzsonhe.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3492
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\lfcsmcbrojwsjrzsonhe.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:4988
  • C:\Windows\nfaogurfateyntzqkh.exe
    nfaogurfateyntzqkh.exe
    1⤵
    • Executes dropped EXE
    PID:3792
  • C:\Windows\avtkfwwnlhvsktcwttomd.exe
    avtkfwwnlhvsktcwttomd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4840
  • C:\Users\Admin\AppData\Local\Temp\lfcsmcbrojwsjrzsonhe.exe
    C:\Users\Admin\AppData\Local\Temp\lfcsmcbrojwsjrzsonhe.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4856
  • C:\Users\Admin\AppData\Local\Temp\yrncvkixtnzukryqljc.exe
    C:\Users\Admin\AppData\Local\Temp\yrncvkixtnzukryqljc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2104
  • C:\Users\Admin\AppData\Local\Temp\evpctgcpjblesxcsl.exe
    C:\Users\Admin\AppData\Local\Temp\evpctgcpjblesxcsl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5552
  • C:\Windows\yrncvkixtnzukryqljc.exe
    yrncvkixtnzukryqljc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3268
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\yrncvkixtnzukryqljc.exe*."
      2⤵
      • Executes dropped EXE
      PID:3712
  • C:\Windows\evpctgcpjblesxcsl.exe
    evpctgcpjblesxcsl.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4248
  • C:\Windows\avtkfwwnlhvsktcwttomd.exe
    avtkfwwnlhvsktcwttomd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2596
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\avtkfwwnlhvsktcwttomd.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:3416
  • C:\Users\Admin\AppData\Local\Temp\xngsiupbulumzdhw.exe
    C:\Users\Admin\AppData\Local\Temp\xngsiupbulumzdhw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4080
  • C:\Windows\evpctgcpjblesxcsl.exe
    evpctgcpjblesxcsl.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2400
    • C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
      "C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe" "c:\windows\evpctgcpjblesxcsl.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:2412

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

        afnot.exe
        • Path C:\Users\Admin\AppData\Local\Temp\afnot.exe
        • Size 736KB
        • SHA256 2dc83b9662f4ba7f120b679a28182e79936e7c886bef85ea32c3a3c5aace7632
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        swjrqpzmcgt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\swjrqpzmcgt.exe
        • Size 320KB
        • SHA256 f604baf867543643590ad9690607aaaf03f80644c1a4d1502fa533c08e2adb0b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        rvccggppwbyefxpsyhlsswwffm.ouv
        • Path C:\Users\Admin\AppData\Local\rvccggppwbyefxpsyhlsswwffm.ouv
        • Size 280B
        • SHA256 bda6cc3506caa973810386bf7ce35fdc94c70b5289284811c8d574248c7e96ac
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        shzkzkephxfwiloctncufufzkcsardgjxoixp.pau
        • Path C:\Users\Admin\AppData\Local\shzkzkephxfwiloctncufufzkcsardgjxoixp.pau
        • Size 4KB
        • SHA256 a0d3b9b58b45afa54802f007b3cbca90ec2daf02f1cd94fcf29d3793d96a443c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nfaogurfateyntzqkh.exe
        • Path C:\Windows\SysWOW64\nfaogurfateyntzqkh.exe
        • Size 1016KB
        • SHA256 4ead061ce77e00a73922495a1c9298df7913b866deb7d80ddc8d5f35b6a55763
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download