Analysis

  • max time kernel
    150s
  • max time network
    147s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    22/09/2026, 22:56

General

  • Target
    2026-09-22_015f2d5a9e8bd5b866a414b6a1639b10_elex_rhadamanthys_smoke-loader.exe
  • Size 1.5MB
  • Sample260922-2wpewahc67
  • SHA256 bc8fdb735669f83bed938fca2ed7d5d852def36ab44721865ffc769a359d97a7
  • 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\2026-09-22_015f2d5a9e8bd5b866a414b6a1639b10_elex_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2026-09-22_015f2d5a9e8bd5b866a414b6a1639b10_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:4884
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k GPSvcGroup
    1⤵
      PID:1152

    Network

          MITRE ATT&CK Enterprise v16

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          7z.exe

          • Path C:\Program Files\7-Zip\7z.exe
          • Size 327KB
          • SHA256 1940592f5b69df48b484386a617e6f4f98f29bd6faeeffe78673ca024db1c67a
          • 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 e276e39e5977b70afc8248ad93e7b8e05724ab82d45bf065f56f9c5725f78193
          • MD5 SHA1 SHA512 SSDEEP TLSH

          RCX5444.tmp

          • Path C:\Program Files\Google\Chrome\Application\RCX5444.tmp
          • Size 284KB
          • SHA256 490daf4711b585fcd0cd3fe2c3d5b34ebe1f36add2e5d49fc69d7e55aca4774c
          • MD5 SHA1 SHA512 SSDEEP TLSH

          chrome.exe

          • Path C:\Program Files\Google\Chrome\Application\chrome.exe
          • Size 1.5MB
          • SHA256 3ac2faeedec076214fec5d106b5e02a8f60b3ce1d45c86b106b10b0fff046003
          • MD5 SHA1 SHA512 SSDEEP TLSH

          RCX55C5.tmp

          • Path C:\Program Files\Java\jdk-1.8\bin\RCX55C5.tmp
          • Size 284KB
          • SHA256 20a501f68b5ffeeea67d4cc3d790db2c4622933592d01edabe6889c880b28e47
          • MD5 SHA1 SHA512 SSDEEP TLSH

          crashreporter.exe

          • Path C:\Program Files\Mozilla Firefox\crashreporter.exe
          • Size 1.5MB
          • SHA256 6a81d6af6a8b32071d813b7bfeebdd3ad2262730ee2404675d0bdd74b32f3987
          • MD5 SHA1 SHA512 SSDEEP TLSH