Overview

overview

10

Static

static

3

2026-08-19...at.exe

windows10-2004-x64

10

2026-08-19...at.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    130s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260710-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260710-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    19/08/2026, 16:47

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General

  • Target
    2026-08-19_f881a9df1da9de24e440af349652299c_cryptbot_icedid_mespinoza_njrat.exe
  • Size 2.7MB
  • Sample260819-vaj5psybre
  • SHA256 7a0172df169d67188346b156b7e19090bddda281c68e80c743a452277b431002
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
backdoorcredential_accessdefense_evasiondiscoveryexpiropersistencestealertrojan

Malware Config

Signatures

  • Family: Expiro, m0yv

    Expiro aka m0yv is a multi-functional backdoor written in C++.

    backdoorexpiro
  • Expiro payload 1 IoCs
    backdoor
  • Disables taskbar notifications via registry modification
    defense_evasion
  • Executes dropped EXE 5 IoCs
  • Modifies system executable filetype association 2 TTPs 4 IoCs
    persistence
  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

    credential_accessstealer
  • Windows security modification 2 TTPs 2 IoCs
    defense_evasiontrojan
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates connected drives 3 TTPs 21 IoCs

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

  • Drops file in System32 directory 56 IoCs
  • Drops file in Program Files directory 45 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • System policy modification 1 TTPs 2 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-19_f881a9df1da9de24e440af349652299c_cryptbot_icedid_mespinoza_njrat.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-19_f881a9df1da9de24e440af349652299c_cryptbot_icedid_mespinoza_njrat.exe"
    1⤵
    • Modifies system executable filetype association
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:4292
  • C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
    "C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe"
    1⤵
    • Executes dropped EXE
    • Windows security modification
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • System policy modification
    PID:1776
  • C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe"
    1⤵
    • Executes dropped EXE
    PID:3588
  • C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
    "C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
    1⤵
    • Executes dropped EXE
    • Drops file in Program Files directory
    PID:844
  • \??\c:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE
    "c:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE"
    1⤵
    • Executes dropped EXE
    PID:1408
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:5248

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        elevation_service.exe
        • Path C:\Program Files (x86)\Microsoft\Edge\Application\139.0.3405.125\elevation_service.exe
        • Size 2.7MB
        • SHA256 efe0bd0a6d1159b12705abc6fca18c392059721a465a4235ff253573768c7b55
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        maintenanceservice.exe
        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 818KB
        • SHA256 34706a6843768aa7bfd74b4cd61619390c1d5949cb785acb2c43d28ac05ca1ba
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        OSE.EXE
        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 797KB
        • SHA256 080e4f4fad66a621dc4ad838c33120857db71e07b4eb55e6a8a1672c863355ce
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        elevation_service.exe
        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\elevation_service.exe
        • Size 2.8MB
        • SHA256 a0fee46bf4217c494216c6073851071c73867f990028e6cf667830092864e3e4
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ssh-agent.exe
        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 1.1MB
        • SHA256 7d703752cd5e4d2bc38276bd0150514b7916820c2a785847b61fec868cf42874
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/844-28-0x0000000140000000-0x00000001402B9000-memory.dmp
        Download

        memory/844-20-0x0000000140000000-0x00000001402B9000-memory.dmp
        Download

        memory/1408-33-0x0000000140000000-0x00000001402B3000-memory.dmp
        Download

        memory/1408-72-0x0000000140000000-0x00000001402B3000-memory.dmp
        Download

        memory/1776-10-0x0000000140000000-0x00000001404CD000-memory.dmp
        Download

        memory/1776-70-0x0000000140000000-0x00000001404CD000-memory.dmp
        Download

        memory/3588-15-0x0000000140000000-0x00000001404B7000-memory.dmp
        Download

        memory/3588-71-0x0000000140000000-0x00000001404B7000-memory.dmp
        Download

        memory/4292-0-0x0000000140000000-0x0000000140533000-memory.dmp
        Download

        memory/4292-9-0x0000000140000000-0x0000000140533000-memory.dmp
        Download

        memory/4292-69-0x0000000140000000-0x0000000140533000-memory.dmp
        Download

        memory/5248-44-0x0000000140000000-0x0000000140322000-memory.dmp
        Download

        memory/5248-73-0x0000000140000000-0x0000000140322000-memory.dmp
        Download