Overview

overview

10

Static

static

10

2026-08-08...at.exe

windows10-2004-x64

10

2026-08-08...at.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    151s
  • max time network
    138s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    08/08/2026, 11:28

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General

  • Target
    2026-08-08_d02bef3d9cfbe9270ebb7ff43e1f766d_cryptbot_elex_luca-stealer_mespinoza_njrat.exe
  • Size 2.9MB
  • Sample260808-nkzjtazthy
  • SHA256 cf48d4bc5f1d44a3ace9b6d54df66f19e0f1aadedb0e465b3f1e4e858d6aabd8
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
backdoorcredential_accessdiscoveryexpiropersistencespywarestealer

Malware Config

Signatures

  • Family: Expiro, m0yv

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

    backdoorexpiro
  • Expiro payload 1 IoCs
    backdoor
  • Detects executables packed with VMProtect. 23 IoCs
  • Executes dropped EXE 7 IoCs
  • Modifies system executable filetype association 2 TTPs 8 IoCs
    persistence
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Unsecured Credentials: Credentials In Files 1 TTPs

    Steal credentials from unsecured files.

    credential_accessstealer
  • Drops Chrome extension 1 IoCs
  • 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 58 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 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 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: LoadsDriver 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-08_d02bef3d9cfbe9270ebb7ff43e1f766d_cryptbot_elex_luca-stealer_mespinoza_njrat.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-08_d02bef3d9cfbe9270ebb7ff43e1f766d_cryptbot_elex_luca-stealer_mespinoza_njrat.exe"
    1⤵
    • Modifies system executable filetype association
    • Drops Chrome extension
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2868
  • 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
    PID:3892
  • 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:2784
  • C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
    "C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe"
    1⤵
    • Executes dropped EXE
    PID:2596
  • \??\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:932
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:3640
  • C:\Windows\system32\AgentService.exe
    C:\Windows\system32\AgentService.exe
    1⤵
    • Executes dropped EXE
    PID:6036
  • C:\Windows\system32\wbengine.exe
    "C:\Windows\system32\wbengine.exe"
    1⤵
    • Executes dropped EXE
    PID:6056

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 d4a1d1301236756dd8f2e694e2fd2f1930ce3317c52d65882a96839001ea0dc0
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        maintenanceservice.exe
        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 820KB
        • SHA256 a7261de13d43618f474a1e6329f97c5d4a4da3c70018fa47da6d24ade508c274
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        OSE.EXE
        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 800KB
        • SHA256 bbffe94c6c49d1232dbd280d4eaa854b34acd264045d952b212ee078f733e37d
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        setup.vir
        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\setup.vir
        • Size 6.6MB
        • SHA256 dfc45cba9c1c8e786741b93970e0aaa5c9ff6f298ce331561ebdfec488f9b0a5
        • 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 8d7220b2596a7c700ea61c576b70905642e4542c39e57e9ac192c0c2574e2a6f
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        AgentService.exe
        • Path C:\Windows\System32\AgentService.exe
        • Size 1.4MB
        • SHA256 83e732737af88a20e6a6fa59be968c5ebd8eb40c20c7419a5fad529d50734692
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ssh-agent.exe
        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 1.1MB
        • SHA256 ec4f46c7300b05469e946ad28af8ad108fb8c50c8f4fcb200ac311fdc17af3b6
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        wbengine.exe
        • Path C:\Windows\System32\wbengine.exe
        • Size 2.0MB
        • SHA256 5b78ebd65fb89e4bab3721cdde2d897a652e4cda9911296a6c0e0214cefeb236
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/932-38-0x0000000140000000-0x000000014021A000-memory.dmp
        Download

        memory/932-37-0x0000000140000000-0x000000014021A000-memory.dmp
        Download

        memory/2596-22-0x0000000140000000-0x0000000140220000-memory.dmp
        Download

        memory/2596-23-0x0000000140000000-0x0000000140220000-memory.dmp
        Download

        memory/2784-16-0x0000000140000000-0x000000014041F000-memory.dmp
        Download

        memory/2784-17-0x0000000140000000-0x000000014041F000-memory.dmp
        Download

        memory/2868-0-0x0000000000400000-0x00000000008BB000-memory.dmp
        Download

        memory/2868-10-0x0000000000400000-0x00000000008BB000-memory.dmp
        Download

        memory/3640-49-0x0000000140000000-0x0000000140289000-memory.dmp
        Download

        memory/3640-50-0x0000000140000000-0x0000000140289000-memory.dmp
        Download

        memory/3892-11-0x0000000140000000-0x0000000140434000-memory.dmp
        Download

        memory/6036-55-0x0000000140000000-0x00000001402B2000-memory.dmp
        Download

        memory/6036-56-0x0000000140000000-0x00000001402B2000-memory.dmp
        Download

        memory/6056-61-0x0000000140000000-0x0000000140354000-memory.dmp
        Download

        memory/6056-62-0x0000000140000000-0x0000000140354000-memory.dmp
        Download