Overview

overview

10

Static

static

3

tmpnif77iqx.exe

windows10-ltsc_2021-x64

10

tmpnif77iqx.exe

windows10-2004-x64

10

tmpnif77iqx.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    02/06/2026, 03:58

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General

  • Target
    tmpnif77iqx.exe
  • Size 600KB
  • Sample260602-ejg4psex6p
  • SHA256 5b3dc82ddc8865d7d06be428110829154be48e3345b91a663e4e2435a14d8497
  • 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 36 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 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 9 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\tmpnif77iqx.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpnif77iqx.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2300
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\users\admin\appdata\local\temp\tmpnif77iqx.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:3300
      • C:\Users\Admin\AppData\Local\Temp\bbjrt.exe
        "C:\Users\Admin\AppData\Local\Temp\bbjrt.exe" "-C:\Users\Admin\AppData\Local\Temp\yjcvidpczeqzyqix.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:1044
      • C:\Users\Admin\AppData\Local\Temp\bbjrt.exe
        "C:\Users\Admin\AppData\Local\Temp\bbjrt.exe" "-C:\Users\Admin\AppData\Local\Temp\yjcvidpczeqzyqix.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:1300
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\users\admin\appdata\local\temp\tmpnif77iqx.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:4012
  • C:\Windows\yjcvidpczeqzyqix.exe
    yjcvidpczeqzyqix.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5032
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:4792
  • C:\Windows\mbyvmlbstcsfieatioda.exe
    mbyvmlbstcsfieatioda.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4800
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\mbyvmlbstcsfieatioda.exe*."
      2⤵
      • Executes dropped EXE
      PID:4328
  • C:\Windows\znjfvtiyygvhjezrfky.exe
    znjfvtiyygvhjezrfky.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4540
  • C:\Windows\obwrgdrgfmalmgarei.exe
    obwrgdrgfmalmgarei.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1876
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\obwrgdrgfmalmgarei.exe*."
      2⤵
      • Executes dropped EXE
      PID:3244
  • C:\Users\Admin\AppData\Local\Temp\mbyvmlbstcsfieatioda.exe
    C:\Users\Admin\AppData\Local\Temp\mbyvmlbstcsfieatioda.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5012
  • C:\Users\Admin\AppData\Local\Temp\znjfvtiyygvhjezrfky.exe
    C:\Users\Admin\AppData\Local\Temp\znjfvtiyygvhjezrfky.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4192
  • C:\Windows\znjfvtiyygvhjezrfky.exe
    znjfvtiyygvhjezrfky.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4104
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\znjfvtiyygvhjezrfky.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:3140
  • C:\Windows\frlftpcqouhrrkdtf.exe
    frlftpcqouhrrkdtf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4540
  • C:\Windows\brpnffwoqarfjgdxnukig.exe
    brpnffwoqarfjgdxnukig.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:5000
  • C:\Windows\frlftpcqouhrrkdtf.exe
    frlftpcqouhrrkdtf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3004
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\frlftpcqouhrrkdtf.exe*."
      2⤵
      • Executes dropped EXE
      PID:3304
  • C:\Users\Admin\AppData\Local\Temp\brpnffwoqarfjgdxnukig.exe
    C:\Users\Admin\AppData\Local\Temp\brpnffwoqarfjgdxnukig.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1172
  • C:\Windows\brpnffwoqarfjgdxnukig.exe
    brpnffwoqarfjgdxnukig.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\brpnffwoqarfjgdxnukig.exe*."
      2⤵
      • Executes dropped EXE
      PID:3832
  • C:\Users\Admin\AppData\Local\Temp\yjcvidpczeqzyqix.exe
    C:\Users\Admin\AppData\Local\Temp\yjcvidpczeqzyqix.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3092
  • C:\Windows\yjcvidpczeqzyqix.exe
    yjcvidpczeqzyqix.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4536
    • C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe
      "C:\Users\Admin\AppData\Local\Temp\lswqdqagvcg.exe" "c:\windows\yjcvidpczeqzyqix.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:3088
  • C:\Windows\mbyvmlbstcsfieatioda.exe
    mbyvmlbstcsfieatioda.exe
    1⤵
    • Executes dropped EXE
    PID:2008
  • C:\Windows\obwrgdrgfmalmgarei.exe
    obwrgdrgfmalmgarei.exe
    1⤵
    • Executes dropped EXE
    PID:3304
  • C:\Users\Admin\AppData\Local\Temp\obwrgdrgfmalmgarei.exe
    C:\Users\Admin\AppData\Local\Temp\obwrgdrgfmalmgarei.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3852
  • C:\Users\Admin\AppData\Local\Temp\frlftpcqouhrrkdtf.exe
    C:\Users\Admin\AppData\Local\Temp\frlftpcqouhrrkdtf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3272

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

        bbjrt.exe
        • Path C:\Users\Admin\AppData\Local\Temp\bbjrt.exe
        • Size 724KB
        • SHA256 8da50ccca600b08f3bc6d4f26b237f493e1bffb2e8b106b9c6f8a8d7b554d9e5
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

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

        dxzbxbwsymhzhijhbmgik.kfb
        • Path C:\Users\Admin\AppData\Local\dxzbxbwsymhzhijhbmgik.kfb
        • Size 272B
        • SHA256 ed3665654d3c6815fa126475a4ad9b3a82380ce3bb98648b26df5281c06cb53d
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        ydqdkzfmdcileqclqmreryntarqwzseq.eaf
        • Path C:\Users\Admin\AppData\Local\ydqdkzfmdcileqclqmreryntarqwzseq.eaf
        • Size 3KB
        • SHA256 c351c04b2a2ab4e4f75bce6ee68b8c7f81c7d6aa620ceb1db096c18e89d1a0c7
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        obwrgdrgfmalmgarei.exe
        • Path C:\Windows\SysWOW64\obwrgdrgfmalmgarei.exe
        • Size 600KB
        • SHA256 5b3dc82ddc8865d7d06be428110829154be48e3345b91a663e4e2435a14d8497
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download