Analysis

  • max time kernel
    148s
  • 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
    26/10/2026, 23:34

General

  • Target
    2026-10-25_76f8012d6cf05a3cad14075cecd05c5f_elex_rhadamanthys_smoke-loader.exe
  • Size 1.5MB
  • Sample261026-3kshtszwes
  • SHA256 f70a3cc14e82dc878ef91002dab4fbb85ab40fdbdb7fff46bd826082ec0cacab
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Family: Cosmu

    Cosmu is a Windows worm written in C++.

  • Detects Cosmu payload 4 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\2026-10-25_76f8012d6cf05a3cad14075cecd05c5f_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-10-25_76f8012d6cf05a3cad14075cecd05c5f_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:1192

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 331KB
        • SHA256 41f6a64288ed7475dedb5d3576b86ef7814ba3b147a00bcea85a9e1ce450f557
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA874.tmp

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\RCXA874.tmp
        • Size 288KB
        • SHA256 030e90a9ffd6eda4db5ad68e1d35add543b40dd2f385914a0ad8df70bf435aca
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA885.tmp

        • Path C:\Program Files\Google\Chrome\Application\140.0.7339.81\Installer\RCXA885.tmp
        • Size 288KB
        • SHA256 7605d5ec83966e6f266768a7078de46994ac3d7b8b80c5b2ff4c8e0ef71719dd
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCXA754.tmp

        • Path C:\Program Files\Google\Chrome\Application\RCXA754.tmp
        • Size 288KB
        • SHA256 59275104a1bebfb0b85d1371cbbf3c919b404afe1cf04b842969a7bb0e1cc5e0
        • MD5 SHA1 SHA512 SSDEEP TLSH