Resubmissions

22/11/2025, 18:22

251122-wz4fbazrev10

23/06/2024, 13:48

240623-q4gt8asgmg10

General

  • Target
    Fantom.exe
  • Size 261KB
  • Sample251122-wz4fbazrev
  • SHA256 f4234a501edcd30d3bc15c983692c9450383b73bdd310059405c5e3a43cc730b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\Program Files\7-Zip\DECRYPT_YOUR_FILES.HTML

Ransom Note
  • <html> <head> <style> body{ background-color: #3366CC; } h1 { background-color: RGB(249, 201, 16); } p { background-color: maroon; color: white; } </style> </head> <body> <center> <h1><b> Attention ! All your files </b> have been encrypted. </h1></br> <p> Due encrypting was used algoritm RSA-4096 and AES-256, used for protection military secrets.</br> That means > RESTORE YOU DATA POSIBLE ONLY BUYING decryption passwords from us.</br> Getting a decryption of your files is - SIMPLY task.</br></br> That all what you need:</br> 1. Sent Your ID_KEY on mailbox [email protected] or [email protected] </br> 2. For test, decrypt 2 small files, to be sure that we can decrypt you files.</br> 3. Pay our services. </br> 4. GET software with passwords for decrypt you files.</br> 5. Make measures to prevent this type situations again.</br></br> IMPORTANT(1)</br> Do not try restore files without our help, this is useless, and can destroy you data permanetly.</br></br> IMPORTANT(2) </br> We Cant hold you decryption passwords forever. </br>ALL DECRYPTION PASSWORDS, for what wasn`t we receive reward, will destroy after week of moment of encryption. </p> <p> Your ID_KEY: <br> </p> <table width="1024" border="0"> <tbody> <tr> <td><p>M1XE3SEwOagR8yo8MaWO6qBkHvdV6hfzDFSmW5WPxAeUr287fNIWW2aIxa40p3/TAcr9DJWDSi/4tf+U8wSNEg78M2CdnWpsGmYaHR9UVtj9MXgVHicOhxDiJ/AAFAHi/pq2qrbM8oF0n9YuooMlMB2Xvq+jRUNsK6XizWOeYPbmyJF9gz8rtKWfYN6VZRKmI1hzP767/mV9gd7hTMixS3YTYPcjj4V4XLetxiJ3n5qiQ75stGF4VF7dQSXeSO7GfAK9BxwF6VSdNMgBaw3M9LGoeC7Nh81jWARqbhaspYFcx0wqq56EECd4xCl4M/7n7UP0BLKhSWnVDsZGSLMpYA==ZW4tVVM=</p></td> </tr> </tbody> </table> </center></html></body>

Extracted

Path
  • C:\Program Files\Common Files\microsoft shared\ClickToRun\DECRYPT_YOUR_FILES.HTML

Ransom Note
  • Attention ! All your files have been encrypted. Due encrypting was used algoritm RSA-4096 and AES-256, used for protection military secrets. That means > RESTORE YOU DATA POSIBLE ONLY BUYING decryption passwords from us. Getting a decryption of your files is - SIMPLY task. That all what you need: 1. Sent Your ID_KEY on mailbox [email protected] or [email protected] 2. For test, decrypt 2 small files, to be sure that we can decrypt you files. 3. Pay our services. 4. GET software with passwords for decrypt you files. 5. Make measures to prevent this type situations again. IMPORTANT(1) Do not try restore files without our help, this is useless, and can destroy you data permanetly. IMPORTANT(2) We Cant hold you decryption passwords forever. ALL DECRYPTION PASSWORDS, for what wasn`t we receive reward, will destroy after week of moment of encryption. Your ID_KEY: Fi9w9lPZMCQf++EE9WXETWN9/ajl5cJi2RVK6+VYc9wa3ii4+GaCLEDPBt25uSqM6sxVb3f2TJxBxVAC1sM8YNAG7tS0jRQvBpyzRCR9vO7+JkIIr0Y5R4VAO8sz498s5zyS8lYETZ+YRsnCkasTdoXbze0qYFyS7yM5yaGLoKVYb+ZEybOuwlIzHQNa4mYjey/oDAvqFYbcQ+Uh8jdVHxZwScE9PyKl2oVmsQ2tOoV7OM185TVksaCOY8mvFUyXqHrfyHC4dRj7t/bbaLGpJF7x40LGcsaftKGAO6pjkiMxGWgLvMga4/vb5o0J6k3Xk8xcftZSs7qGwqGET9ElLg==ZW4tVVM=

Targets

    • Target
      Fantom.exe
    • Size 261KB
    • SHA256 f4234a501edcd30d3bc15c983692c9450383b73bdd310059405c5e3a43cc730b
    • MD5 SHA1 SHA512 SSDEEP
    • Fantom

      Ransomware which hides encryption process behind fake Windows Update screen.

    • Fantom family

    • Renames multiple (4457) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

    • Disables Task Manager via registry modification

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Drops Chrome extension

MITRE ATT&CK Enterprise v16

Tasks