Overview

overview

10

Static

static

3

tmpkfdisqat.exe

windows10-ltsc_2021-x64

10

tmpkfdisqat.exe

windows10-2004-x64

10

tmpkfdisqat.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • 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, 15:03

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General

  • Target
    tmpkfdisqat.exe
  • Size 516KB
  • Sample260522-sff9wshs8x
  • SHA256 1c4fcff23a29745f4898a96751ebc60a54f24d887eb91c1c94eb0e8b91dfa288
  • 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 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 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 autorun.inf file 1 TTPs 4 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • 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\tmpkfdisqat.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpkfdisqat.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:892
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\users\admin\appdata\local\temp\tmpkfdisqat.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:4408
      • C:\Users\Admin\AppData\Local\Temp\ucnqcjr.exe
        "C:\Users\Admin\AppData\Local\Temp\ucnqcjr.exe" "-C:\Users\Admin\AppData\Local\Temp\tkeqlbsdshyxatye.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 autorun.inf file
        • 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:3180
      • C:\Users\Admin\AppData\Local\Temp\ucnqcjr.exe
        "C:\Users\Admin\AppData\Local\Temp\ucnqcjr.exe" "-C:\Users\Admin\AppData\Local\Temp\tkeqlbsdshyxatye.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:780
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\users\admin\appdata\local\temp\tmpkfdisqat.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:2868
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1984
  • C:\Windows\wsriidzpjdzdljtesqkgf.exe
    wsriidzpjdzdljtesqkgf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4064
  • C:\Users\Admin\AppData\Local\Temp\hcaqpjetmfadkhqankdy.exe
    C:\Users\Admin\AppData\Local\Temp\hcaqpjetmfadkhqankdy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2476
  • C:\Windows\tkeqlbsdshyxatye.exe
    tkeqlbsdshyxatye.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4232
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\tkeqlbsdshyxatye.exe*."
      2⤵
      • Executes dropped EXE
      PID:2236
  • C:\Windows\jcymjbuhypijojqyje.exe
    jcymjbuhypijojqyje.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2492
  • C:\Users\Admin\AppData\Local\Temp\tkeqlbsdshyxatye.exe
    C:\Users\Admin\AppData\Local\Temp\tkeqlbsdshyxatye.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:232
  • C:\Windows\jcymjbuhypijojqyje.exe
    jcymjbuhypijojqyje.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:448
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\jcymjbuhypijojqyje.exe*."
      2⤵
      • Executes dropped EXE
      PID:3288
  • C:\Windows\asnawnfrhxpptntak.exe
    asnawnfrhxpptntak.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2256
  • C:\Windows\uolayrlzrjdflhpykgy.exe
    uolayrlzrjdflhpykgy.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2956
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\uolayrlzrjdflhpykgy.exe*."
      2⤵
      • Executes dropped EXE
      PID:820
  • C:\Windows\wsriidzpjdzdljtesqkgf.exe
    wsriidzpjdzdljtesqkgf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4016
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\wsriidzpjdzdljtesqkgf.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:4880
  • C:\Users\Admin\AppData\Local\Temp\uolayrlzrjdflhpykgy.exe
    C:\Users\Admin\AppData\Local\Temp\uolayrlzrjdflhpykgy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3852
  • C:\Users\Admin\AppData\Local\Temp\wsriidzpjdzdljtesqkgf.exe
    C:\Users\Admin\AppData\Local\Temp\wsriidzpjdzdljtesqkgf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4480
  • C:\Users\Admin\AppData\Local\Temp\asnawnfrhxpptntak.exe
    C:\Users\Admin\AppData\Local\Temp\asnawnfrhxpptntak.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2696
  • C:\Users\Admin\AppData\Local\Temp\jcymjbuhypijojqyje.exe
    C:\Users\Admin\AppData\Local\Temp\jcymjbuhypijojqyje.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2220
  • C:\Windows\tkeqlbsdshyxatye.exe
    tkeqlbsdshyxatye.exe
    1⤵
    • Executes dropped EXE
    PID:3276
  • C:\Windows\asnawnfrhxpptntak.exe
    asnawnfrhxpptntak.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3652
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\asnawnfrhxpptntak.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:4848
  • C:\Windows\uolayrlzrjdflhpykgy.exe
    uolayrlzrjdflhpykgy.exe
    1⤵
    • Executes dropped EXE
    PID:4680
  • C:\Windows\hcaqpjetmfadkhqankdy.exe
    hcaqpjetmfadkhqankdy.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1796
  • C:\Windows\hcaqpjetmfadkhqankdy.exe
    hcaqpjetmfadkhqankdy.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3220
    • C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
      "C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe" "c:\windows\hcaqpjetmfadkhqankdy.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:844

Network

        MITRE ATT&CK Enterprise v16

        Reconnaissance

        Resource Development

        Initial Access

        Replication Through Removable Media

        1
        T1091

        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

        Replication Through Removable Media

        1
        T1091

        Collection

        Command and Control

        Exfiltration

        Impact

        Replay Monitor

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        Downloads

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Program Files (x86)\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 af5a35ca4fd11adf4708e68134021058d8c002a42a4f9b85088f315604a4b384
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Program Files (x86)\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 737e96051fc61e4b06d9c38ce3560f33daa40cc25d1676a337dc0f3f7dcd47e3
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Program Files (x86)\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 609010a92d628692e11ffa3a8288d00ec36abe94ef6ab7348d7746720fb4bebf
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Program Files (x86)\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 b993b3e09eb8d21104d483e15f5124978be5a420dc9f3cebfa57bc5a67e1eff4
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Program Files (x86)\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 11abd7bf57a481d5f093383f69aece7459a3eed78a8ebac2a401f671d8977388
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Program Files (x86)\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 dc89ca10cf307ca7848b50f34488c698e4dd302aa746083ff0aee21535664f6f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        pjhvvwaoztr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\pjhvvwaoztr.exe
        • Size 320KB
        • SHA256 0cc02d34d5fd4cf892fed282f98c1ad3e7dd6159a8877ae5c46d3f834ed36060
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ucnqcjr.exe
        • Path C:\Users\Admin\AppData\Local\Temp\ucnqcjr.exe
        • Size 716KB
        • SHA256 4fb4387bdbe7bdf3efc69d1df40e97ab8e413b45cf901534af516260439e2353
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nsaajnsruxcpgngaxehmuudhml.rwj
        • Path C:\Users\Admin\AppData\Local\nsaajnsruxcpgngaxehmuudhml.rwj
        • Size 272B
        • SHA256 f514baa522ed0209757fae8e0787f9d231bbc1b0f1be71ce293cdb6b8dfdfba5
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        oexicrhrftjhjbfkskyohsmbrbpdtrtlpucui.rcw
        • Path C:\Users\Admin\AppData\Local\oexicrhrftjhjbfkskyohsmbrbpdtrtlpucui.rcw
        • Size 3KB
        • SHA256 eb4fb6ad10ed89457bbf543d7a6fd1df265f5516dbc9f8fd70742eda77fb5ea1
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        jcymjbuhypijojqyje.exe
        • Path C:\Windows\SysWOW64\jcymjbuhypijojqyje.exe
        • Size 516KB
        • SHA256 1c4fcff23a29745f4898a96751ebc60a54f24d887eb91c1c94eb0e8b91dfa288
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        oapwmxjpzjv.bat
        • Path C:\oapwmxjpzjv.bat
        • Size 656KB
        • SHA256 a271556735a6bb205d225e579e8aa2011b0c82ebcf8e0ef7f6b425eb0d986748
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download