Overview

overview

10

Static

static

3

tmp9izf8l1m.exe

windows10-ltsc_2021-x64

10

tmp9izf8l1m.exe

windows10-2004-x64

10

tmp9izf8l1m.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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, 15:18

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General

  • Target
    tmp9izf8l1m.exe
  • Size 640KB
  • Sample260522-spv5eahx7z
  • SHA256 b7f14ca5c74288d372b0dc9e66bd34a7fb1b4d184246c5d63496f9677fd0af68
  • 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 34 IoCs
    persistence
  • Disables RegEdit via registry modification 9 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 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 autorun.inf file 1 TTPs 4 IoCs

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

  • 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 16 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\tmp9izf8l1m.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp9izf8l1m.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3028
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\users\admin\appdata\local\temp\tmp9izf8l1m.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:2256
      • C:\Users\Admin\AppData\Local\Temp\tjixahp.exe
        "C:\Users\Admin\AppData\Local\Temp\tjixahp.exe" "-c:\users\admin\appdata\local\temp\tmp9izf8l1m.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:2120
      • C:\Users\Admin\AppData\Local\Temp\tjixahp.exe
        "C:\Users\Admin\AppData\Local\Temp\tjixahp.exe" "-c:\users\admin\appdata\local\temp\tmp9izf8l1m.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:1096
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\users\admin\appdata\local\temp\tmp9izf8l1m.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:3708
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:2092
  • C:\Windows\gjvxnhcwnfyubkasuqcf.exe
    gjvxnhcwnfyubkasuqcf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1556
  • C:\Windows\zzihulduixngkqdsr.exe
    zzihulduixngkqdsr.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4348
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\zzihulduixngkqdsr.exe*."
      2⤵
      • Executes dropped EXE
      PID:4968
  • C:\Users\Admin\AppData\Local\Temp\vzmpgbxskdxucmdwzwjna.exe
    C:\Users\Admin\AppData\Local\Temp\vzmpgbxskdxucmdwzwjna.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3784
  • C:\Windows\srzxjzqgthworwiw.exe
    srzxjzqgthworwiw.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2592
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\srzxjzqgthworwiw.exe*."
      2⤵
      • Executes dropped EXE
      PID:1684
  • C:\Users\Admin\AppData\Local\Temp\gjvxnhcwnfyubkasuqcf.exe
    C:\Users\Admin\AppData\Local\Temp\gjvxnhcwnfyubkasuqcf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1716
  • C:\Windows\srzxjzqgthworwiw.exe
    srzxjzqgthworwiw.exe
    1⤵
    • Executes dropped EXE
    PID:2540
  • C:\Windows\ijtthzskzpgafmaqqk.exe
    ijtthzskzpgafmaqqk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\ijtthzskzpgafmaqqk.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:5080
  • C:\Windows\vzmpgbxskdxucmdwzwjna.exe
    vzmpgbxskdxucmdwzwjna.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4828
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\vzmpgbxskdxucmdwzwjna.exe*."
      2⤵
      • Executes dropped EXE
      PID:4104
  • C:\Users\Admin\AppData\Local\Temp\zzihulduixngkqdsr.exe
    C:\Users\Admin\AppData\Local\Temp\zzihulduixngkqdsr.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1184
  • C:\Windows\ijtthzskzpgafmaqqk.exe
    ijtthzskzpgafmaqqk.exe
    1⤵
    • Executes dropped EXE
    PID:5092
  • C:\Windows\tvghwpjcsjbwckzqrmx.exe
    tvghwpjcsjbwckzqrmx.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\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\tvghwpjcsjbwckzqrmx.exe*."
      2⤵
      • Executes dropped EXE
      PID:4128
  • C:\Windows\tvghwpjcsjbwckzqrmx.exe
    tvghwpjcsjbwckzqrmx.exe
    1⤵
    • Executes dropped EXE
    PID:764
  • C:\Users\Admin\AppData\Local\Temp\tvghwpjcsjbwckzqrmx.exe
    C:\Users\Admin\AppData\Local\Temp\tvghwpjcsjbwckzqrmx.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4260
  • C:\Users\Admin\AppData\Local\Temp\ijtthzskzpgafmaqqk.exe
    C:\Users\Admin\AppData\Local\Temp\ijtthzskzpgafmaqqk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4424
  • C:\Windows\vzmpgbxskdxucmdwzwjna.exe
    vzmpgbxskdxucmdwzwjna.exe
    1⤵
    • Executes dropped EXE
    PID:4880
  • C:\Windows\gjvxnhcwnfyubkasuqcf.exe
    gjvxnhcwnfyubkasuqcf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3104
    • C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
      "C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe" "c:\windows\gjvxnhcwnfyubkasuqcf.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
      • Drops file in System32 directory
      • Drops file in Windows directory
      • System policy modification
      PID:2860
  • C:\Windows\zzihulduixngkqdsr.exe
    zzihulduixngkqdsr.exe
    1⤵
    • Executes dropped EXE
    PID:3488
  • C:\Users\Admin\AppData\Local\Temp\srzxjzqgthworwiw.exe
    C:\Users\Admin\AppData\Local\Temp\srzxjzqgthworwiw.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2124

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

        wfxfbbcczxwylawucewfxf.bcc
        • Path C:\Program Files (x86)\wfxfbbcczxwylawucewfxf.bcc
        • Size 280B
        • SHA256 d21d67bb9a5c1e943113278564f965c78d4cd93279cf94426577c4ef1291c1c9
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wfxfbbcczxwylawucewfxf.bcc
        • Path C:\Program Files (x86)\wfxfbbcczxwylawucewfxf.bcc
        • Size 280B
        • SHA256 44f5cb73a84c7cd0c53f5cb116d842ea79fee7cd9990050bbffe59ad9e5c8580
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wfxfbbcczxwylawucewfxf.bcc
        • Path C:\Program Files (x86)\wfxfbbcczxwylawucewfxf.bcc
        • Size 280B
        • SHA256 ddfa73c9e02c9f1480622e47ca00c4bf2d41b124d27f5de3aba550e42d395684
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wfxfbbcczxwylawucewfxf.bcc
        • Path C:\Program Files (x86)\wfxfbbcczxwylawucewfxf.bcc
        • Size 280B
        • SHA256 3d6346066ac5c73d8bdee01f59f2390f00353d77f44c7537e784e088056e8d42
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        nayyfohuxki.exe
        • Path C:\Users\Admin\AppData\Local\Temp\nayyfohuxki.exe
        • Size 320KB
        • SHA256 5323b5f9cf364e8bc94f8b910179c2fb1789698f6812d6dfd85fa8eed407ebca
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        tjixahp.exe
        • Path C:\Users\Admin\AppData\Local\Temp\tjixahp.exe
        • Size 708KB
        • SHA256 9e42b60991118b6a34d560bc8018001ebf9391ee0706cd70dbde159d85c79261
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        nhkdkvhsajtgeelunadxatalxiqzjwuub.dqt
        • Path C:\Users\Admin\AppData\Local\nhkdkvhsajtgeelunadxatalxiqzjwuub.dqt
        • Size 4KB
        • SHA256 6cc5037fbaae2f2b1261f9d441a8a5dc68ce1a134aa75c64484033da2d6790be
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        wfxfbbcczxwylawucewfxf.bcc
        • Path C:\Users\Admin\AppData\Local\wfxfbbcczxwylawucewfxf.bcc
        • Size 280B
        • SHA256 1471afda6f540f2770e3a44ef3fe62fe29e164fab6c29319a614e3cb6cb5582b
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        wfxfbbcczxwylawucewfxf.bcc
        • Path C:\Users\Admin\AppData\Local\wfxfbbcczxwylawucewfxf.bcc
        • Size 280B
        • SHA256 bf8a8a0c068ffa872ee52e0197aa0c21c8136d5fcc9dcbf08e3966e7b3659b95
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ijtthzskzpgafmaqqk.exe
        • Path C:\Windows\SysWOW64\ijtthzskzpgafmaqqk.exe
        • Size 640KB
        • SHA256 b7f14ca5c74288d372b0dc9e66bd34a7fb1b4d184246c5d63496f9677fd0af68
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        slnflvgqxf.bat
        • Path C:\slnflvgqxf.bat
        • Size 468KB
        • SHA256 65f4fc96e4ff8761c8b4b372b0b69295fd721df4beea0474c6bc78223b0ea4bf
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download