Overview

overview

10

Static

static

3

RMD MINGGUAN.exe

windows10-ltsc_2021-x64

10

Analysis

  • user interaction
    yes
  • max time kernel
    71s
  • max time network
    73s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20260911-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20260911-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
  • submitted
    30/09/2026, 11:23

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General

  • Target
    RMD MINGGUAN.exe
  • Size 556KB
  • Sample260930-ng4pcstanh
  • SHA256 95ae2b37d68b84781889fbf1150281f8b4ca227a308ce89c2e2e9bddd53242ee
  • 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 5 IoCs
    persistence
  • UAC bypass 3 TTPs 14 IoCs
    defense_evasiontrojan
  • Adds policy Run key to start application 2 TTPs 27 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 27 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 10 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 1 TTPs 7 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

    discovery
  • Drops autorun.inf file 1 TTPs 4 IoCs

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

  • Drops file in System32 directory 39 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 39 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

    discovery
  • 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 9 IoCs
  • System policy modification 1 TTPs 40 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\RMD MINGGUAN.exe
    "C:\Users\Admin\AppData\Local\Temp\RMD MINGGUAN.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:64
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\users\admin\appdata\local\temp\rmd mingguan.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:2304
      • C:\Users\Admin\AppData\Local\Temp\ejlmu.exe
        "C:\Users\Admin\AppData\Local\Temp\ejlmu.exe" "-C:\Users\Admin\AppData\Local\Temp\breqjvrdrhkxasqk.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
        • Reads the TCP/IP host and domain name from the registry
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • System policy modification
        PID:4804
      • C:\Users\Admin\AppData\Local\Temp\ejlmu.exe
        "C:\Users\Admin\AppData\Local\Temp\ejlmu.exe" "-C:\Users\Admin\AppData\Local\Temp\breqjvrdrhkxasqk.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:1940
  • C:\Windows\cvlawlkzqjpflghefjg.exe
    cvlawlkzqjpflghefjg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1856
  • C:\Windows\rjymhvthxpujoiieeh.exe
    rjymhvthxpujoiieeh.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4464
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\windows\rjymhvthxpujoiieeh.exe*."
      2⤵
      • Executes dropped EXE
      PID:1832
  • C:\Windows\explorer.exe
    Explorer.exe
    1⤵
    • Modifies registry class
    PID:1364
  • C:\Users\Admin\AppData\Local\Temp\pjaqnddtlfmdkgiginlf.exe
    C:\Users\Admin\AppData\Local\Temp\pjaqnddtlfmdkgiginlf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3868
  • C:\Windows\pjaqnddtlfmdkgiginlf.exe
    pjaqnddtlfmdkgiginlf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4020
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\windows\pjaqnddtlfmdkgiginlf.exe*."
      2⤵
      • Executes dropped EXE
      PID:2804
  • C:\Users\Admin\AppData\Local\Temp\ezrigxypidldlilkntsnf.exe
    C:\Users\Admin\AppData\Local\Temp\ezrigxypidldlilkntsnf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3240
  • C:\Windows\ezrigxypidldlilkntsnf.exe
    ezrigxypidldlilkntsnf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:60
  • C:\Windows\pjaqnddtlfmdkgiginlf.exe
    pjaqnddtlfmdkgiginlf.exe
    1⤵
    • Executes dropped EXE
    PID:5052
  • C:\Windows\ezrigxypidldlilkntsnf.exe
    ezrigxypidldlilkntsnf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2504
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\windows\ezrigxypidldlilkntsnf.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:2972
  • C:\Users\Admin\AppData\Local\Temp\breqjvrdrhkxasqk.exe
    C:\Users\Admin\AppData\Local\Temp\breqjvrdrhkxasqk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:988
  • C:\Users\Admin\AppData\Local\Temp\iznauhergxbptmlgf.exe
    C:\Users\Admin\AppData\Local\Temp\iznauhergxbptmlgf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3480
  • C:\Windows\iznauhergxbptmlgf.exe
    iznauhergxbptmlgf.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3240
  • C:\Windows\breqjvrdrhkxasqk.exe
    breqjvrdrhkxasqk.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:3772
  • C:\Windows\cvlawlkzqjpflghefjg.exe
    cvlawlkzqjpflghefjg.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3888
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\windows\cvlawlkzqjpflghefjg.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:2052
  • C:\Users\Admin\AppData\Local\Temp\rjymhvthxpujoiieeh.exe
    C:\Users\Admin\AppData\Local\Temp\rjymhvthxpujoiieeh.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2296
  • C:\Windows\breqjvrdrhkxasqk.exe
    breqjvrdrhkxasqk.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1956
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\windows\breqjvrdrhkxasqk.exe*."
      2⤵
      • Executes dropped EXE
      PID:1244
  • C:\Windows\iznauhergxbptmlgf.exe
    iznauhergxbptmlgf.exe .
    1⤵
    • Checks computer location settings
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4284
    • C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
      "C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe" "c:\windows\iznauhergxbptmlgf.exe*."
      2⤵
      • Executes dropped EXE
      PID:1740
  • C:\Users\Admin\AppData\Local\Temp\cvlawlkzqjpflghefjg.exe
    C:\Users\Admin\AppData\Local\Temp\cvlawlkzqjpflghefjg.exe
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:4184
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:2128
    • C:\Windows\rjymhvthxpujoiieeh.exe
      rjymhvthxpujoiieeh.exe
      1⤵
      • Executes dropped EXE
      PID:3304

    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

          System Network Configuration Discovery

          2
          T1016

          Internet Connection Discovery

          1
          T1016.001

          Lateral Movement

          Replication Through Removable Media

          1
          T1091

          Collection

          Command and Control

          Exfiltration

          Impact

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          vzaahhrrtxopgmygshptuubbll.rij
          • Path C:\Program Files (x86)\vzaahhrrtxopgmygshptuubbll.rij
          • Size 280B
          • SHA256 701824ec924c725299032d1e6f5aa490b1f8661cc8ccf3c63aa77f93b8f357f8
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          vzaahhrrtxopgmygshptuubbll.rij
          • Path C:\Program Files (x86)\vzaahhrrtxopgmygshptuubbll.rij
          • Size 280B
          • SHA256 6edd2aab4fece5a796318021fbb41211aa949843176408b4e2a45ad9ddac9e40
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          vzaahhrrtxopgmygshptuubbll.rij
          • Path C:\Program Files (x86)\vzaahhrrtxopgmygshptuubbll.rij
          • Size 280B
          • SHA256 6fd18a4ebae8d2eb25324df08afb46ebc19158160ebd20c4e091b90ba98bfc9e
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          bjhuncvrltr.exe
          • Path C:\Users\Admin\AppData\Local\Temp\bjhuncvrltr.exe
          • Size 320KB
          • SHA256 1c1c7fd9dc5196b3a8acb5db221e3a381ef0ce3ef62bde2cc3a928104ce7ef46
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          ejlmu.exe
          • Path C:\Users\Admin\AppData\Local\Temp\ejlmu.exe
          • Size 708KB
          • SHA256 35499c92268feef5de92d43728eab143d8078e6351e54e2bd785b21976dcf13a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          vzaahhrrtxopgmygshptuubbll.rij
          • Path C:\Users\Admin\AppData\Local\vzaahhrrtxopgmygshptuubbll.rij
          • Size 280B
          • SHA256 e276ced7afe065e936595f6973d68447afed6849ce2e0d3576af082c7d8dddec
          • MD5 SHA1 SHA512 TLSH
          Submit Download

          wlxialgretvhjaxqnngvhskvqbodfrtkhaxxq.rcu
          • Path C:\Users\Admin\AppData\Local\wlxialgretvhjaxqnngvhskvqbodfrtkhaxxq.rcu
          • Size 4KB
          • SHA256 fcf06254cb96247c0b6039176313ccbf4e3e1c5fd1d3afbdc7565c1729fafc3a
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          rjymhvthxpujoiieeh.exe
          • Path C:\Windows\SysWOW64\rjymhvthxpujoiieeh.exe
          • Size 556KB
          • SHA256 95ae2b37d68b84781889fbf1150281f8b4ca227a308ce89c2e2e9bddd53242ee
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download

          blsylrhnvf.bat
          • Path C:\blsylrhnvf.bat
          • Size 648KB
          • SHA256 3eef046357e09f246f72baa7ee1738cd9169269ba283cde609aceb2961374182
          • MD5 SHA1 SHA512 SSDEEP TLSH
          Submit Download