Overview

overview

10

Static

static

3

2026-10-01...at.exe

windows10-2004-x64

10

2026-10-01...at.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    127s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    02/10/2026, 15:51

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General

  • Target
    2026-10-01_42ec916683fbb3f2ba651eacb99e3dc8_cryptbot_icedid_mespinoza_njrat.exe
  • Size 2.7MB
  • Sample261002-tarn4svgmd
  • SHA256 2d304122ff8ffc3ab672d3bc328527525bff4b50b5223ae9f49f2053eea2f0a0
  • 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 22 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).

  • 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
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 42 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\2026-10-01_42ec916683fbb3f2ba651eacb99e3dc8_cryptbot_icedid_mespinoza_njrat.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-01_42ec916683fbb3f2ba651eacb99e3dc8_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
    • Reads the TCP/IP host and domain name from the registry
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2864
  • 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:2012
  • 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:5040
  • 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:5904
  • \??\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:3828
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:4832

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 3f5855639f83ccb944cea91d2e0fdc1446ad8c14409a73a8fa44b0762c98f833
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        maintenanceservice.exe
        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 810KB
        • SHA256 03d7b5fff60a7970f23ad51de8f93208656ddec72443e72b023818f7cb676891
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        OSE.EXE
        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 789KB
        • SHA256 98f288911a234f3baa6b9eda637928b16633629ba28ebfa5b9c6cbf16b858c4f
        • 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 2614791843fb4f2b1073e8c874c20b96a7cb1ca66709e1fc5b19a726a8c7275e
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ssh-agent.exe
        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 1.1MB
        • SHA256 3a794e838267e43de1189bd3966c3a70071525814810867a7cbeec4a6b92ed04
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2012-10-0x0000000140000000-0x0000000140440000-memory.dmp
        Download

        memory/2012-70-0x0000000140000000-0x0000000140440000-memory.dmp
        Download

        memory/2864-0-0x0000000140000000-0x00000001404A7000-memory.dmp
        Download

        memory/2864-9-0x0000000140000000-0x00000001404A7000-memory.dmp
        Download

        memory/2864-69-0x0000000140000000-0x00000001404A7000-memory.dmp
        Download

        memory/3828-72-0x0000000140000000-0x0000000140226000-memory.dmp
        Download

        memory/3828-33-0x0000000140000000-0x0000000140226000-memory.dmp
        Download

        memory/4832-73-0x0000000140000000-0x0000000140295000-memory.dmp
        Download

        memory/4832-44-0x0000000140000000-0x0000000140295000-memory.dmp
        Download

        memory/5040-15-0x0000000140000000-0x000000014042B000-memory.dmp
        Download

        memory/5040-71-0x0000000140000000-0x000000014042B000-memory.dmp
        Download

        memory/5904-31-0x0000000140000000-0x000000014022C000-memory.dmp
        Download

        memory/5904-20-0x0000000140000000-0x000000014022C000-memory.dmp
        Download