Overview

overview

10

Static

static

10

mhsra.exe

windows10-2004-x64

10

mhsra.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260617-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260617-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    23/06/2026, 06:22

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General

  • Target
    mhsra.exe
  • Size 203KB
  • Sample260623-g42d7aa171
  • SHA256 752faadcef0c8a53370583cddec408b88b0922655e260d424763ce00f08b91d4
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
adwaredefense_evasiondiscoveryexecutionnanocorekeyloggerpersistenceransomwarespywarestealertrojan

Malware Config

Extracted

Family

  • nanocore

Version

  • 1.2.2.0

C2

  • mhsra.com:443

  • www.mhsra.com:443

Mutex

  • 73349d73-93a9-4f3e-ae3e-acc1a456a384

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    www.mhsra.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2026-04-04T08:00:11.787167136Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    443

  • default_group

    Default

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    73349d73-93a9-4f3e-ae3e-acc1a456a384

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    mhsra.com

  • primary_dns_server

    8.8.8.8

  • request_elevation

    false

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • Family: NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

    keyloggertrojanstealerspywarenanocore
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    defense_evasiontrojan
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 62 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
    adwarespyware
  • Modifies registry class 38 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 29 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 33 IoCs
  • Suspicious use of FindShellTrayWindow 53 IoCs
  • Suspicious use of SendNotifyMessage 39 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence
  • Uses Volume Shadow Copy WMI provider

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\mhsra.exe
    "C:\Users\Admin\AppData\Local\Temp\mhsra.exe"
    1⤵
    • Adds Run key to start application
    • Checks whether UAC is enabled
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1132
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "IMAP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1860.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:5784
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "IMAP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp192C.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3000
  • C:\Program Files (x86)\IMAP Manager\imapmgr.exe
    "C:\Program Files (x86)\IMAP Manager\imapmgr.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:1808
  • C:\Users\Admin\AppData\Local\Temp\mhsra.exe
    "C:\Users\Admin\AppData\Local\Temp\mhsra.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:1828
  • C:\Windows\system32\sihost.exe
    sihost.exe
    1⤵
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of WriteProcessMemory
    PID:5988
    • C:\Windows\explorer.exe
      explorer.exe /LOADSAVEDWINDOWS
      2⤵
      • Boot or Logon Autostart Execution: Active Setup
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      PID:1988
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\SearchHost.exe" -ServerName:CortanaUI.AppXstmwaab17q5s3y22tp6apqz7a45vwv65.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:3192
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2956

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        imapmgr.exe
        • Path C:\Program Files (x86)\IMAP Manager\imapmgr.exe
        • Size 203KB
        • SHA256 752faadcef0c8a53370583cddec408b88b0922655e260d424763ce00f08b91d4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        prep_Activatable Class_Hermes_perf.cache
        • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\prep_Activatable Class_Hermes_perf.cache
        • Size 599B
        • SHA256 b536a3dae9ea5c69081f0491eed829e3b57e32401fdf49a63031bcd6b20e6fdb
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tmp1860.tmp
        • Path C:\Users\Admin\AppData\Local\Temp\tmp1860.tmp
        • Size 1KB
        • SHA256 1a8ffcaba7e0f581569915fc9b08764f71fd224fb1b8556d7a9be16c4db4e84f
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        tmp192C.tmp
        • Path C:\Users\Admin\AppData\Local\Temp\tmp192C.tmp
        • Size 1KB
        • SHA256 a9df5dc5b3462bdfeaedb8b1bb3733fab886d77805b004adaaa4a5fba7f2c404
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/1132-14-0x0000000001870000-0x0000000001880000-memory.dmp
        Download

        memory/1132-1-0x0000000074982000-0x0000000074984000-memory.dmp
        Download

        memory/1132-19-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1132-11-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1132-0-0x0000000001870000-0x0000000001880000-memory.dmp
        Download

        memory/1132-15-0x0000000074982000-0x0000000074984000-memory.dmp
        Download

        memory/1808-16-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1808-17-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1808-10-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1808-9-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1828-13-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1828-12-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/1828-18-0x0000000074980000-0x0000000074FA1000-memory.dmp
        Download

        memory/3192-23-0x00000163001E0000-0x00000163002E0000-memory.dmp
        Download

        memory/3192-67-0x0000016314120000-0x0000016314140000-memory.dmp
        Download

        memory/3192-35-0x0000016301D90000-0x0000016301E90000-memory.dmp
        Download

        memory/3192-33-0x0000016301930000-0x0000016301950000-memory.dmp
        Download

        memory/3192-45-0x0000016301B90000-0x0000016301BB0000-memory.dmp
        Download

        memory/3192-21-0x00000163001E0000-0x00000163002E0000-memory.dmp
        Download

        memory/3192-204-0x00000163470A0000-0x000001634897C000-memory.dmp
        Download