Overview

overview

10

Static

static

3

2026-09-10...at.exe

windows10-2004-x64

10

2026-09-10...at.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    11/09/2026, 02:28

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General

  • Target
    2026-09-10_b1c1fe7e003b602cbeefe7f7fce48fdb_cryptbot_icedid_mespinoza_njrat.exe
  • Size 2.7MB
  • Sample260911-cydnqabk6x
  • SHA256 5d4dd0cd2664b558998bbc029f432498548e06b3aaf6be17111ed3b155a658c8
  • 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 6 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 46 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 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • System policy modification 1 TTPs 2 IoCs
    defense_evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-09-10_b1c1fe7e003b602cbeefe7f7fce48fdb_cryptbot_icedid_mespinoza_njrat.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-09-10_b1c1fe7e003b602cbeefe7f7fce48fdb_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:4424
  • 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:3572
  • 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
    • 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:3124
  • 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:4352
  • \??\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:4192
  • C:\Windows\System32\OpenSSH\ssh-agent.exe
    C:\Windows\System32\OpenSSH\ssh-agent.exe
    1⤵
    • Executes dropped EXE
    PID:5468
  • C:\Windows\system32\AgentService.exe
    C:\Windows\system32\AgentService.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1260

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 1bcfdb65ee898d1feb1b083e7895e2c23ce68374648fdcd0dbaa28b44f5e04cf
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        maintenanceservice.exe
        • Path C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe
        • Size 814KB
        • SHA256 acb7681c5003abd21df8bfb1f6cbe6dc6ad75cc72f56b6c4f3db98327c251a27
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        OSE.EXE
        • Path C:\Program Files\Common Files\microsoft shared\Source Engine\OSE.EXE
        • Size 793KB
        • SHA256 4a1c9683f58fce9284a5879598355d2f4c2d1773814165a9deb7f318bf0942b6
        • 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 7c71a280ad15d8f7d03ae3b315eb06f0c4cbbcb269c1a4109b16be414c008c87
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        AgentService.exe
        • Path C:\Windows\System32\AgentService.exe
        • Size 1.4MB
        • SHA256 0a74e7620585c7b2a33665f52dfc7a99b1c86cbc93bde4b3cbab876c1ec1ee6c
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        ssh-agent.exe
        • Path C:\Windows\System32\OpenSSH\ssh-agent.exe
        • Size 1.1MB
        • SHA256 97f3228f87d2e64a70c42ca169c381e30f4bec421991f6f0d09e3c4881e55971
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1260-81-0x0000000140000000-0x00000001402C0000-memory.dmp
        Download

        memory/1260-50-0x0000000140000000-0x00000001402C0000-memory.dmp
        Download

        memory/3124-16-0x0000000140000000-0x000000014042C000-memory.dmp
        Download

        memory/3124-86-0x0000000140000000-0x000000014042C000-memory.dmp
        Download

        memory/3572-11-0x0000000140000000-0x0000000140441000-memory.dmp
        Download

        memory/3572-10-0x0000000140000000-0x0000000140441000-memory.dmp
        Download

        memory/4192-34-0x0000000140000000-0x0000000140227000-memory.dmp
        Download

        memory/4192-87-0x0000000140000000-0x0000000140227000-memory.dmp
        Download

        memory/4352-32-0x0000000140000000-0x000000014022D000-memory.dmp
        Download

        memory/4352-21-0x0000000140000000-0x000000014022D000-memory.dmp
        Download

        memory/4424-0-0x0000000140000000-0x0000000140533000-memory.dmp
        Download

        memory/4424-85-0x0000000140000000-0x0000000140533000-memory.dmp
        Download

        memory/4424-9-0x0000000140000000-0x0000000140533000-memory.dmp
        Download

        memory/5468-45-0x0000000140000000-0x0000000140296000-memory.dmp
        Download

        memory/5468-88-0x0000000140000000-0x0000000140296000-memory.dmp
        Download