Overview

overview

10

Static

static

3

tmpvfrhow54.exe

windows10-ltsc_2021-x64

10

tmpvfrhow54.exe

windows10-2004-x64

10

tmpvfrhow54.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • 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, 15:21

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target
    tmpvfrhow54.exe
  • Size 560KB
  • Sample260522-srmaaafv9p
  • SHA256 91c53cbeec6bc93467588bd0657b4f5d1bb0658c5c89bc28ad599c8931db80b4
  • 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 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\tmpvfrhow54.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpvfrhow54.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3896
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\users\admin\appdata\local\temp\tmpvfrhow54.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:4772
      • C:\Users\Admin\AppData\Local\Temp\iqtcet.exe
        "C:\Users\Admin\AppData\Local\Temp\iqtcet.exe" "-C:\Users\Admin\AppData\Local\Temp\umzsedlhsksdsmbb.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 Location Discovery: System Language Discovery
        • System policy modification
        PID:5936
      • C:\Users\Admin\AppData\Local\Temp\iqtcet.exe
        "C:\Users\Admin\AppData\Local\Temp\iqtcet.exe" "-C:\Users\Admin\AppData\Local\Temp\umzsedlhsksdsmbb.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:5344
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\users\admin\appdata\local\temp\tmpvfrhow54.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:928
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:3616
  • C:\Windows\ketocdnlyscpgctvin.exe
    ketocdnlyscpgctvin.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2836
  • C:\Users\Admin\AppData\Local\Temp\vqgcrtedrmxldasvjpz.exe
    C:\Users\Admin\AppData\Local\Temp\vqgcrtedrmxldasvjpz.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3932
  • C:\Windows\buicppyvhajvlgwxj.exe
    buicppyvhajvlgwxj.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3960
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\windows\buicppyvhajvlgwxj.exe*."
      2⤵
      • Executes dropped EXE
      PID:1328
  • C:\Windows\vqgcrtedrmxldasvjpz.exe
    vqgcrtedrmxldasvjpz.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1316
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\windows\vqgcrtedrmxldasvjpz.exe*."
      2⤵
      • Executes dropped EXE
      PID:1088
  • C:\Users\Admin\AppData\Local\Temp\buicppyvhajvlgwxj.exe
    C:\Users\Admin\AppData\Local\Temp\buicppyvhajvlgwxj.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1848
  • C:\Windows\umzsedlhsksdsmbb.exe
    umzsedlhsksdsmbb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1732
  • C:\Windows\ievsilxxmiujcatxmtea.exe
    ievsilxxmiujcatxmtea.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5900
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\windows\ievsilxxmiujcatxmtea.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:5180
  • C:\Windows\umzsedlhsksdsmbb.exe
    umzsedlhsksdsmbb.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5312
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\windows\umzsedlhsksdsmbb.exe*."
      2⤵
      • Executes dropped EXE
      PID:5920
  • C:\Users\Admin\AppData\Local\Temp\umzsedlhsksdsmbb.exe
    C:\Users\Admin\AppData\Local\Temp\umzsedlhsksdsmbb.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:996
  • C:\Users\Admin\AppData\Local\Temp\ketocdnlyscpgctvin.exe
    C:\Users\Admin\AppData\Local\Temp\ketocdnlyscpgctvin.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2440
  • C:\Windows\ketocdnlyscpgctvin.exe
    ketocdnlyscpgctvin.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5796
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\windows\ketocdnlyscpgctvin.exe*."
      2⤵
      • Executes dropped EXE
      PID:2920
  • C:\Users\Admin\AppData\Local\Temp\xumkbfstjgtjdcwbrzlia.exe
    C:\Users\Admin\AppData\Local\Temp\xumkbfstjgtjdcwbrzlia.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1120
  • C:\Windows\buicppyvhajvlgwxj.exe
    buicppyvhajvlgwxj.exe
    1⤵
    • Executes dropped EXE
    PID:1816
  • C:\Windows\ievsilxxmiujcatxmtea.exe
    ievsilxxmiujcatxmtea.exe
    1⤵
    • Executes dropped EXE
    PID:5464
  • C:\Windows\vqgcrtedrmxldasvjpz.exe
    vqgcrtedrmxldasvjpz.exe
    1⤵
    • Executes dropped EXE
    PID:5972
  • C:\Windows\xumkbfstjgtjdcwbrzlia.exe
    xumkbfstjgtjdcwbrzlia.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4532
  • C:\Windows\xumkbfstjgtjdcwbrzlia.exe
    xumkbfstjgtjdcwbrzlia.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3884
    • C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
      "C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe" "c:\windows\xumkbfstjgtjdcwbrzlia.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:5112
  • C:\Users\Admin\AppData\Local\Temp\ievsilxxmiujcatxmtea.exe
    C:\Users\Admin\AppData\Local\Temp\ievsilxxmiujcatxmtea.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5252

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

        iqtcet.exe
        • Path C:\Users\Admin\AppData\Local\Temp\iqtcet.exe
        • Size 704KB
        • SHA256 82b878d8494929586398cfd972a55453c1ec6a152d1bce89c3309431ffb75d7b
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        jpzoytzxtzj.exe
        • Path C:\Users\Admin\AppData\Local\Temp\jpzoytzxtzj.exe
        • Size 320KB
        • SHA256 e1862453216f1acaf5896750bf93ce1163a18b044815cf12373f5a9569cfaa9c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ugnagzbrwikpymvpurselyexzpuginwk.nsp
        • Path C:\Users\Admin\AppData\Local\ugnagzbrwikpymvpurselyexzpuginwk.nsp
        • Size 4KB
        • SHA256 0dcc84f9b9de52ed8419722de817e6a537a3e6c7e02c0a0cc38f891b6f13dad3
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        zawytbsxrsjdbeclfrhie.bja
        • Path C:\Users\Admin\AppData\Local\zawytbsxrsjdbeclfrhie.bja
        • Size 280B
        • SHA256 a7bbd7cbe7bdac8abf76ee356eb77b451cb8a6264af97a3d9a149b34b611ddf0
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ketocdnlyscpgctvin.exe
        • Path C:\Windows\SysWOW64\ketocdnlyscpgctvin.exe
        • Size 560KB
        • SHA256 91c53cbeec6bc93467588bd0657b4f5d1bb0658c5c89bc28ad599c8931db80b4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download