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
    151s
  • 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, 14:28

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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 6 IoCs
    persistence
  • UAC bypass 3 TTPs 15 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 35 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 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 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\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:1068
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.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:1392
      • C:\Users\Admin\AppData\Local\Temp\chmtxgl.exe
        "C:\Users\Admin\AppData\Local\Temp\chmtxgl.exe" "-C:\Users\Admin\AppData\Local\Temp\bpdtgymbsizisesp.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:3908
      • C:\Users\Admin\AppData\Local\Temp\chmtxgl.exe
        "C:\Users\Admin\AppData\Local\Temp\chmtxgl.exe" "-C:\Users\Admin\AppData\Local\Temp\bpdtgymbsizisesp.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:2776
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.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:2976
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2636
  • C:\Users\Admin\AppData\Local\Temp\bpdtgymbsizisesp.exe
    C:\Users\Admin\AppData\Local\Temp\bpdtgymbsizisesp.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2428
  • C:\Windows\ixmdrkzphyqalynla.exe
    ixmdrkzphyqalynla.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4392
  • C:\Windows\ixmdrkzphyqalynla.exe
    ixmdrkzphyqalynla.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4320
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\ixmdrkzphyqalynla.exe*."
      2⤵
      • Executes dropped EXE
      PID:900
  • C:\Windows\exqldatnjeaodunpiwsle.exe
    exqldatnjeaodunpiwsle.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:760
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\exqldatnjeaodunpiwsle.exe*."
      2⤵
      • Executes dropped EXE
      PID:5056
  • C:\Users\Admin\AppData\Local\Temp\exqldatnjeaodunpiwsle.exe
    C:\Users\Admin\AppData\Local\Temp\exqldatnjeaodunpiwsle.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1188
  • C:\Windows\exqldatnjeaodunpiwsle.exe
    exqldatnjeaodunpiwsle.exe
    1⤵
    • Executes dropped EXE
    PID:2024
  • C:\Windows\bpdtgymbsizisesp.exe
    bpdtgymbsizisesp.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3044
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\bpdtgymbsizisesp.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:3288
  • C:\Windows\phztkgyrmgbocskldqld.exe
    phztkgyrmgbocskldqld.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3488
  • C:\Users\Admin\AppData\Local\Temp\ctkdtofxrkeqdsjjamg.exe
    C:\Users\Admin\AppData\Local\Temp\ctkdtofxrkeqdsjjamg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3136
  • C:\Windows\ctkdtofxrkeqdsjjamg.exe
    ctkdtofxrkeqdsjjamg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:376
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\ctkdtofxrkeqdsjjamg.exe*."
      2⤵
      • Executes dropped EXE
      PID:1204
  • C:\Users\Admin\AppData\Local\Temp\rhxpeyofyqjugukjzk.exe
    C:\Users\Admin\AppData\Local\Temp\rhxpeyofyqjugukjzk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2076
  • C:\Users\Admin\AppData\Local\Temp\phztkgyrmgbocskldqld.exe
    C:\Users\Admin\AppData\Local\Temp\phztkgyrmgbocskldqld.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2436
  • C:\Windows\rhxpeyofyqjugukjzk.exe
    rhxpeyofyqjugukjzk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1768
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\rhxpeyofyqjugukjzk.exe*."
      2⤵
      • Executes dropped EXE
      PID:4752
  • C:\Windows\ctkdtofxrkeqdsjjamg.exe
    ctkdtofxrkeqdsjjamg.exe
    1⤵
    • Executes dropped EXE
    PID:2388
  • C:\Windows\bpdtgymbsizisesp.exe
    bpdtgymbsizisesp.exe
    1⤵
    • Executes dropped EXE
    PID:1912
  • C:\Users\Admin\AppData\Local\Temp\ixmdrkzphyqalynla.exe
    C:\Users\Admin\AppData\Local\Temp\ixmdrkzphyqalynla.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3956
  • C:\Windows\rhxpeyofyqjugukjzk.exe
    rhxpeyofyqjugukjzk.exe
    1⤵
    • Executes dropped EXE
    PID:4260
  • C:\Windows\phztkgyrmgbocskldqld.exe
    phztkgyrmgbocskldqld.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2116
    • C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
      "C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe" "c:\windows\phztkgyrmgbocskldqld.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:2580

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

        chmtxgl.exe
        • Path C:\Users\Admin\AppData\Local\Temp\chmtxgl.exe
        • Size 708KB
        • SHA256 f8a5a12121e463d0027edff01ef3f30d8e199a916e006fa989fd10230dbc14ae
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        quzgphquaej.exe
        • Path C:\Users\Admin\AppData\Local\Temp\quzgphquaej.exe
        • Size 320KB
        • SHA256 bb613640d46cedbfe29647a8feafc4361c04239e8b6a2db998486627bc972e5d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        vxzdekmpuydayyalnkprtxyegj.sxu
        • Path C:\Users\Admin\AppData\Local\vxzdekmpuydayyalnkprtxyegj.sxu
        • Size 280B
        • SHA256 b8997dba7597587f87f361ec7e6493c3d4f054413fc4abb75b3e2903e82efa85
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wjwlxobpfuksbmzviqgtgvhylzpeuclwjfsaq.qfr
        • Path C:\Users\Admin\AppData\Local\wjwlxobpfuksbmzviqgtgvhylzpeuclwjfsaq.qfr
        • Size 4KB
        • SHA256 6428296d8cc95bb98df2be13aef7b16117cebd7d5c4a504c6153d84f899202bb
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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