Analysis

  • max time kernel
    148s
  • max time network
    144s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    17/08/2026, 21:07

General

  • Target
    2026-08-17_ef1e09ca84dc68f216bae32e3504111e_elex_rhadamanthys_smoke-loader.exe
  • Size 288KB
  • Sample260817-zycsrazang
  • SHA256 afc2193154f0f9b64eb1c1f58fcdc8fede3e111e2742c079f3237712180aee55
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10

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.

  • Drops file in Program Files directory 64 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\2026-08-17_ef1e09ca84dc68f216bae32e3504111e_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-08-17_ef1e09ca84dc68f216bae32e3504111e_elex_rhadamanthys_smoke-loader.exe"
    1⤵
    • Enumerates connected drives
    • Drops file in Program Files directory
    • System Location Discovery: System Language Discovery
    PID:5668

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        7z.exe

        • Path C:\Program Files\7-Zip\7z.exe
        • Size 329KB
        • SHA256 eb3ee7bad7b9064d0e6c85dec1c2942f0384fb180fa4a590222a47099b353047
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX539.tmp

        • Path C:\Program Files\Google\Chrome\Application\RCX539.tmp
        • Size 288KB
        • SHA256 5dbc11b9dfd912781b480fa731ceb060269a587f9ffe6fb1e931ab2ba9f6a4b9
        • MD5 SHA1 SHA512 SSDEEP TLSH

        RCX6DA.tmp

        • Path C:\Program Files\Java\jdk-1.8\bin\RCX6DA.tmp
        • Size 288KB
        • SHA256 f13d1f7864850ad003e7f7ab2371fc8947ea4c08f91b188c03dd02a71b5273b1
        • MD5 SHA1 SHA512 SSDEEP TLSH

        default-browser-agent.exe

        • Path C:\Program Files\Mozilla Firefox\default-browser-agent.exe
        • Size 288KB
        • SHA256 06488e09c2360006c682be69a203f021c19daea2de1ad56ccc465c8e9d744a35
        • MD5 SHA1 SHA512 SSDEEP TLSH