Analysis

  • max time kernel
    148s
  • max time network
    116s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    10/07/2026, 22:22

General

  • Target
    2026-07-10_8e3fdbb76cfcd1fc1a5ac36d0fd7e35b_elex_rhadamanthys_smoke-loader.exe
  • Size 288KB
  • Sample260710-1962eae16s
  • SHA256 18133aa676d4eab800a494010e86b7881ada8cb0f561a6c4d56fbdfdafa967c6
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

  • Detects Cosmu payload 6 IoCs

    Cosmu is a worm written in C++.

  • Enumerates connected drives 3 TTPs 10 IoCs

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

  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 2 IoCs
  • 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.

  • Modifies Internet Explorer settings 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-07-10_8e3fdbb76cfcd1fc1a5ac36d0fd7e35b_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-07-10_8e3fdbb76cfcd1fc1a5ac36d0fd7e35b_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies Internet Explorer settings
    PID:4828

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 333KB
        • SHA256 d1bcd815e318f899ab845023056acc98fcd56320e1cbef8ea0bc8d3b9d204d1f
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX43AF.tmp

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\RCX43AF.tmp
        • Size 284KB
        • SHA256 5861ad4067661b668de0324dbd92a9750fda6e01113c9aac0a8a9bf4c7140bc7
        • MD5 SHA1 SHA512 SSDEEP TLSH

        chrmstp.exe

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\chrmstp.exe
        • Size 1.5MB
        • SHA256 ca96ed5eee805ac06176d85978eecada17f88c97cff1ec2aa94c81e94495e612
        • MD5 SHA1 SHA512 SSDEEP TLSH

        chrome_pwa_launcher.exe

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\chrome_pwa_launcher.exe
        • Size 1.5MB
        • SHA256 b14aedba804351d1d4dcea36c3e6a94cf9302c6aa29bc104a8db9638d6a25c01
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX4214.tmp

        • Path C:\Program Files\Google\Chrome\Application\RCX4214.tmp
        • Size 284KB
        • SHA256 8efd5fe0ed90dbe5414520b7e18c912381339aba9852f5e4829c5c91a05197dc
        • MD5 SHA1 SHA512 SSDEEP TLSH

        crashreporter.exe

        • Path C:\Program Files\Mozilla Firefox\crashreporter.exe
        • Size 1.5MB
        • SHA256 b7ec3cf0d6e1960a98ec54f514d8beaaee535bbffdb95f4a6c6dd3b9bc2c8f4b
        • MD5 SHA1 SHA512 SSDEEP TLSH