Analysis

  • max time kernel
    150s
  • max time network
    125s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    20/10/2026, 23:27

General

  • Target
    2026-10-19_371eff5e24c6332e28a336c4ebed6cda_elex_rhadamanthys_smoke-loader.exe
  • Size 320KB
  • Sample261020-3frezabs8k
  • SHA256 eeb37ec9c1d432e2c48d9421d9582d3d51d2ff7226f7f60d5d8a14514cd8a9af
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

  • Detects Cosmu payload 8 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\2026-10-19_371eff5e24c6332e28a336c4ebed6cda_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-19_371eff5e24c6332e28a336c4ebed6cda_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:3440

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 284KB
        • SHA256 4ea0201b09cd70c32a7d52544fe372c2d5c664b59e22a76f9ca1273bbba4e7c2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX6D5.tmp

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\RCX6D5.tmp
        • Size 284KB
        • SHA256 9fc58364ed7d077ea87af855d3ee60a6adfa46c1f1f6b88a30ffc47ceb7593b8
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX6E6.tmp

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\RCX6E6.tmp
        • Size 284KB
        • SHA256 811c8cb31885d69acffc657a8dbfe6cdf4a3a3a75830e98a32f24682129229b1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        chrome.exe

        • Path C:\Program Files\Google\Chrome\Application\chrome.exe
        • Size 284KB
        • SHA256 0e16bac7d689de9fb254e4bf04145c3a6e68111492ba7d97184e97ca0649a26b
        • MD5 SHA1 SHA512 SSDEEP TLSH

        chrome.exe

        • Path C:\Program Files\Google\Chrome\Application\chrome.exe
        • Size 1.5MB
        • SHA256 81e88941cd43a29bfad74896f2a062fab3708396d8657f110d93e6a3977aa3e2
        • MD5 SHA1 SHA512 SSDEEP TLSH

        jabswitch.exe

        • Path C:\Program Files\Java\jre-1.8\bin\jabswitch.exe
        • Size 284KB
        • SHA256 586be53cc093a2a58810bdfd359552b492164508d75116581a8d2cec0e157675
        • MD5 SHA1 SHA512 SSDEEP TLSH

        helper.exe

        • Path C:\Program Files\Mozilla Firefox\uninstall\helper.exe
        • Size 346KB
        • SHA256 df2d0ca08868f8d52ce730004251a1677e1c98aaa65c23d6d68de3d86600e295
        • MD5 SHA1 SHA512 SSDEEP TLSH

        dotnet.exe

        • Path C:\Program Files\dotnet\dotnet.exe
        • Size 284KB
        • SHA256 6004770fc7d3cea13ad80c7ff817b0b36673906472adc268548315f68cbce2fa
        • MD5 SHA1 SHA512 SSDEEP TLSH