Overview

overview

10

Static

static

3

tmpxtrlx0io.exe

windows10-ltsc_2021-x64

10

tmpxtrlx0io.exe

windows10-2004-x64

10

tmpxtrlx0io.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    22/05/2026, 14:44

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General

  • Target
    tmpxtrlx0io.exe
  • Size 592KB
  • Sample260522-r4ce6set5p
  • SHA256 95cb74bdf85aeefa394ffffe9fed5c4bcd75ea11621a67882f364d827b42e037
  • 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 6 IoCs
    defense_evasion
  • 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 4 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 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\tmpxtrlx0io.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpxtrlx0io.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3984
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\users\admin\appdata\local\temp\tmpxtrlx0io.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
      • 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:1336
      • C:\Users\Admin\AppData\Local\Temp\denss.exe
        "C:\Users\Admin\AppData\Local\Temp\denss.exe" "-C:\Users\Admin\AppData\Local\Temp\amgwhykgyiivznvz.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:1448
      • C:\Users\Admin\AppData\Local\Temp\denss.exe
        "C:\Users\Admin\AppData\Local\Temp\denss.exe" "-C:\Users\Admin\AppData\Local\Temp\amgwhykgyiivznvz.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:1712
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\users\admin\appdata\local\temp\tmpxtrlx0io.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:4072
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4452
  • C:\Windows\amgwhykgyiivznvz.exe
    amgwhykgyiivznvz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:8
  • C:\Windows\oecwlgwwsgkbjbnvewka.exe
    oecwlgwwsgkbjbnvewka.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1668
  • C:\Windows\bqnguodcxkndkbmtbsf.exe
    bqnguodcxkndkbmtbsf.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3940
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\bqnguodcxkndkbmtbsf.exe*."
      2⤵
      • Executes dropped EXE
      PID:4844
  • C:\Users\Admin\AppData\Local\Temp\hupgskxunyznshqvb.exe
    C:\Users\Admin\AppData\Local\Temp\hupgskxunyznshqvb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:244
  • C:\Windows\qeasfymkeqshndntaq.exe
    qeasfymkeqshndntaq.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:856
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\qeasfymkeqshndntaq.exe*."
      2⤵
      • Executes dropped EXE
      PID:948
  • C:\Users\Admin\AppData\Local\Temp\dutoearspejbkdqzjcrih.exe
    C:\Users\Admin\AppData\Local\Temp\dutoearspejbkdqzjcrih.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1724
  • C:\Windows\amgwhykgyiivznvz.exe
    amgwhykgyiivznvz.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3932
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\amgwhykgyiivznvz.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:228
  • C:\Windows\bqnguodcxkndkbmtbsf.exe
    bqnguodcxkndkbmtbsf.exe
    1⤵
    • Executes dropped EXE
    PID:3780
  • C:\Windows\dutoearspejbkdqzjcrih.exe
    dutoearspejbkdqzjcrih.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:772
  • C:\Windows\hupgskxunyznshqvb.exe
    hupgskxunyznshqvb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4040
  • C:\Windows\hupgskxunyznshqvb.exe
    hupgskxunyznshqvb.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1516
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\hupgskxunyznshqvb.exe*."
      2⤵
      • Executes dropped EXE
      PID:2496
  • C:\Users\Admin\AppData\Local\Temp\oecwlgwwsgkbjbnvewka.exe
    C:\Users\Admin\AppData\Local\Temp\oecwlgwwsgkbjbnvewka.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2404
  • C:\Windows\dutoearspejbkdqzjcrih.exe
    dutoearspejbkdqzjcrih.exe .
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2880
    • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
      "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\dutoearspejbkdqzjcrih.exe*."
      2⤵
      • Executes dropped EXE
      PID:2316
  • C:\Users\Admin\AppData\Local\Temp\amgwhykgyiivznvz.exe
    C:\Users\Admin\AppData\Local\Temp\amgwhykgyiivznvz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3068
  • C:\Windows\System32\Conhost.exe
    \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
    1⤵
      PID:4844
    • C:\Users\Admin\AppData\Local\Temp\qeasfymkeqshndntaq.exe
      C:\Users\Admin\AppData\Local\Temp\qeasfymkeqshndntaq.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:5028
    • C:\Windows\qeasfymkeqshndntaq.exe
      qeasfymkeqshndntaq.exe
      1⤵
      • Executes dropped EXE
      PID:1408
    • C:\Users\Admin\AppData\Local\Temp\bqnguodcxkndkbmtbsf.exe
      C:\Users\Admin\AppData\Local\Temp\bqnguodcxkndkbmtbsf.exe
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:1428
    • C:\Windows\oecwlgwwsgkbjbnvewka.exe
      oecwlgwwsgkbjbnvewka.exe .
      1⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1640
      • C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
        "C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe" "c:\windows\oecwlgwwsgkbjbnvewka.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:4452

    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

          System Information Discovery

          2
          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

          denss.exe
          • Path C:\Users\Admin\AppData\Local\Temp\denss.exe
          • Size 712KB
          • SHA256 6ec0b019d4ddb810c1961e979001732be5ecf9e85a1fca9af4e6e94b6d8d81da
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          zhgpsrrajrq.exe
          • Path C:\Users\Admin\AppData\Local\Temp\zhgpsrrajrq.exe
          • Size 320KB
          • SHA256 a4f94782787fa9ec3a5353c6e79745f4c50c7efd40c158cae4cb0a66d9563b8b
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          aguejuaqcgahfnpnmuyeschsyoaeyfdl.lks
          • Path C:\Users\Admin\AppData\Local\aguejuaqcgahfnpnmuyeschsyoaeyfdl.lks
          • Size 4KB
          • SHA256 bcb40874b484716b04bb84b76070b957b9ef58fb1194f040200fb1bb30ba3eab
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          fadcwwrwxqzvifwjxunil.eez
          • Path C:\Users\Admin\AppData\Local\fadcwwrwxqzvifwjxunil.eez
          • Size 280B
          • SHA256 2c942ec0c6f3f381940c2c350d3beb3cea48da57ad3226995aa1dcf348f4816b
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          qeasfymkeqshndntaq.exe
          • Path C:\Windows\SysWOW64\qeasfymkeqshndntaq.exe
          • Size 592KB
          • SHA256 95cb74bdf85aeefa394ffffe9fed5c4bcd75ea11621a67882f364d827b42e037
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download