Overview

overview

10

Static

static

3

tmpx7zfwysq.exe

windows10-ltsc_2021-x64

10

tmpx7zfwysq.exe

windows10-2004-x64

10

tmpx7zfwysq.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • 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, 14:28

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General

  • Target
    tmpx7zfwysq.exe
  • Size 1016KB
  • Sample260522-rtesjsdz2n
  • SHA256 81275952478c989e3792f397f101cb5b1ec01fe782f5bb418ac6df550c633b55
  • 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 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 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 10 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 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\tmpx7zfwysq.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpx7zfwysq.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2848
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\users\admin\appdata\local\temp\tmpx7zfwysq.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:4840
      • C:\Users\Admin\AppData\Local\Temp\hryyik.exe
        "C:\Users\Admin\AppData\Local\Temp\hryyik.exe" "-C:\Users\Admin\AppData\Local\Temp\tneoiurdwffvslaw.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:3404
      • C:\Users\Admin\AppData\Local\Temp\hryyik.exe
        "C:\Users\Admin\AppData\Local\Temp\hryyik.exe" "-C:\Users\Admin\AppData\Local\Temp\tneoiurdwffvslaw.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:2372
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\users\admin\appdata\local\temp\tmpx7zfwysq.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:1776
  • C:\Windows\wvrgfwypnbgbdbvwhpokz.exe
    wvrgfwypnbgbdbvwhpokz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:208
  • C:\Windows\urlyvkkzvhkddzrqzfc.exe
    urlyvkkzvhkddzrqzfc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:32
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\urlyvkkzvhkddzrqzfc.exe*."
      2⤵
      • Executes dropped EXE
      PID:4780
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4276
  • C:\Windows\avnytgerlvwnlfvsz.exe
    avnytgerlvwnlfvsz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3192
  • C:\Windows\wvrgfwypnbgbdbvwhpokz.exe
    wvrgfwypnbgbdbvwhpokz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\wvrgfwypnbgbdbvwhpokz.exe*."
      2⤵
      • Executes dropped EXE
      PID:3068
  • C:\Users\Admin\AppData\Local\Temp\jfykguthcnphgbsqyd.exe
    C:\Users\Admin\AppData\Local\Temp\jfykguthcnphgbsqyd.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1664
  • C:\Users\Admin\AppData\Local\Temp\hfaomcdtqdhbczsscjhc.exe
    C:\Users\Admin\AppData\Local\Temp\hfaomcdtqdhbczsscjhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4908
  • C:\Windows\hfaomcdtqdhbczsscjhc.exe
    hfaomcdtqdhbczsscjhc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3160
  • C:\Windows\tneoiurdwffvslaw.exe
    tneoiurdwffvslaw.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2460
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\tneoiurdwffvslaw.exe*."
      2⤵
      • Executes dropped EXE
      PID:1368
  • C:\Windows\jfykguthcnphgbsqyd.exe
    jfykguthcnphgbsqyd.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1476
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\jfykguthcnphgbsqyd.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:1108
  • C:\Users\Admin\AppData\Local\Temp\wvrgfwypnbgbdbvwhpokz.exe
    C:\Users\Admin\AppData\Local\Temp\wvrgfwypnbgbdbvwhpokz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4216
  • C:\Windows\urlyvkkzvhkddzrqzfc.exe
    urlyvkkzvhkddzrqzfc.exe
    1⤵
    • Executes dropped EXE
    PID:3964
  • C:\Windows\hfaomcdtqdhbczsscjhc.exe
    hfaomcdtqdhbczsscjhc.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4356
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\hfaomcdtqdhbczsscjhc.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:2732
  • C:\Users\Admin\AppData\Local\Temp\urlyvkkzvhkddzrqzfc.exe
    C:\Users\Admin\AppData\Local\Temp\urlyvkkzvhkddzrqzfc.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4304
  • C:\Windows\jfykguthcnphgbsqyd.exe
    jfykguthcnphgbsqyd.exe
    1⤵
    • Executes dropped EXE
    PID:3736
  • C:\Users\Admin\AppData\Local\Temp\tneoiurdwffvslaw.exe
    C:\Users\Admin\AppData\Local\Temp\tneoiurdwffvslaw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1780
  • C:\Users\Admin\AppData\Local\Temp\avnytgerlvwnlfvsz.exe
    C:\Users\Admin\AppData\Local\Temp\avnytgerlvwnlfvsz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3264
  • C:\Windows\tneoiurdwffvslaw.exe
    tneoiurdwffvslaw.exe
    1⤵
    • Executes dropped EXE
    PID:2444
  • C:\Windows\avnytgerlvwnlfvsz.exe
    avnytgerlvwnlfvsz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1408
    • C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
      "C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe" "c:\windows\avnytgerlvwnlfvsz.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:3572

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

        nvayggrryvjnyfismdlqowwhho.zdo
        • Path C:\Program Files (x86)\nvayggrryvjnyfismdlqowwhho.zdo
        • Size 280B
        • SHA256 fec6bf437fdd95ece0d4ff98381cf7063e9affb4c83bc8b4c933adabebd832ed
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nvayggrryvjnyfismdlqowwhho.zdo
        • Path C:\Program Files (x86)\nvayggrryvjnyfismdlqowwhho.zdo
        • Size 280B
        • SHA256 6facce1e37b3fff51c46aae3274d6ab971efe4c687994c16794592a440d8ddbc
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        hryyik.exe
        • Path C:\Users\Admin\AppData\Local\Temp\hryyik.exe
        • Size 716KB
        • SHA256 76fd931171d1711d15912c7fa3eafbc9f5cf2067e6e7866c7c518815d5a7b8db
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        mhskyizawrc.exe
        • Path C:\Users\Admin\AppData\Local\Temp\mhskyizawrc.exe
        • Size 320KB
        • SHA256 ab06080a3f14338640ef7486c51f3bda4552690afbcc682ed8c5493427a18ba4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nvayggrryvjnyfismdlqowwhho.zdo
        • Path C:\Users\Admin\AppData\Local\nvayggrryvjnyfismdlqowwhho.zdo
        • Size 280B
        • SHA256 5be3955eeccfffd00fa0d0e7c51c8e3029460e0138b7a3d1af9646042e1c7b05
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ohxgzkgrjrqfbthchjcsbufbmemlawocxcexn.paw
        • Path C:\Users\Admin\AppData\Local\ohxgzkgrjrqfbthchjcsbufbmemlawocxcexn.paw
        • Size 4KB
        • SHA256 349439680adc0044e0eac0311a289eb4bd1902a6f90771e622662a55de9ee4ec
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        jfykguthcnphgbsqyd.exe
        • Path C:\Windows\SysWOW64\jfykguthcnphgbsqyd.exe
        • Size 1016KB
        • SHA256 81275952478c989e3792f397f101cb5b1ec01fe782f5bb418ac6df550c633b55
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download