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General

  • Target

    Fantom.exe

  • Size

    261KB

  • Sample

    241128-ym7nbaykez

  • MD5

    7d80230df68ccba871815d68f016c282

  • SHA1

    e10874c6108a26ceedfc84f50881824462b5b6b6

  • SHA256

    f4234a501edcd30d3bc15c983692c9450383b73bdd310059405c5e3a43cc730b

  • SHA512

    64d02b3e7ed82a64aaac1f74c34d6b6e6feaac665ca9c08911b93eddcec66595687024ec576e74ea09a1193ace3923969c75de8733859835fef45335cf265540

  • SSDEEP

    3072:vDKW1LgppLRHMY0TBfJvjcTp5XxG8pt+oSOpE22obq+NYgvPuCEbMBWJxLRiUgV:vDKW1Lgbdl0TBBvjc/M8n35nYgvKjdzi

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0018-0409-0000-0000000FF1CE}-C\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>Aw84mBVYLArc91ce1mlnyVcxY19AMvjTAyKpviDfr/3o4N4SA7ZJOnSK/G5KNETXDrOZOZLLGCD0EFCiKs8fAO2t55GpY6lJ67Q5jdOxexcUowFjvQNhPIXw0gqwSWuJ3z3G5FArbaPgoYhtPrYMdTvMNMUSmi3UA7V9sFNAoI/S9mbeOAgd6pysslQ5Rj266iBcSIDn064CnhYOjkyM0nvugHELdzJ3YXhS5Mx+cO5yXV+ZW3tjsJnjFIWsJSk7SwJZvP3TnKAA3LDZ1hMQ58ffpWvJQH2Kxamr+Ck/s6+NdE96Kd+vUJJ5IABeMfUiRikU8h7rIZinRlSlhBYJrA==ZW4tVVM=</p></td> </tr> </tbody> </table> </center></html></body>

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>TtsbBSkcpKWju75ux5Cbyj67Jd3A3AIyF5CKurNEMFfXspXhaeJjGmSSd1InF/F7oasdkPDAJZYGMURlxRDrhAlxXmHStyX5V8GXutRdY8PdVAkindXdjpkKLYdfKo97VElVGXbqyiZHSUxlnVW2FQf5zJPjQ4Sd7oyS6D0CbpXe6nnh9hZm9N7bEmZTTYp7pm/dpMpOHHv+dDkjbXKEysO4uzN/FLF/Hd9A7YZ/lfKXK+89cBJcwNi8zFwXOe8a1bw9bthzf/aJmNudt86QBKSdUy5V36Dq519944+oxZHNCPeqtwmcsh9zXTKwx2/bw165xEHmYMCLPyEvuF0kUw==ZW4tVVM=</p></td> </tr> </tbody> </table> </center></html></body>

Targets

    • Target

      Fantom.exe

    • Size

      261KB

    • MD5

      7d80230df68ccba871815d68f016c282

    • SHA1

      e10874c6108a26ceedfc84f50881824462b5b6b6

    • SHA256

      f4234a501edcd30d3bc15c983692c9450383b73bdd310059405c5e3a43cc730b

    • SHA512

      64d02b3e7ed82a64aaac1f74c34d6b6e6feaac665ca9c08911b93eddcec66595687024ec576e74ea09a1193ace3923969c75de8733859835fef45335cf265540

    • SSDEEP

      3072:vDKW1LgppLRHMY0TBfJvjcTp5XxG8pt+oSOpE22obq+NYgvPuCEbMBWJxLRiUgV:vDKW1Lgbdl0TBBvjc/M8n35nYgvKjdzi

    • Fantom

      Ransomware which hides encryption process behind fake Windows Update screen.

    • Fantom family

    • Renames multiple (3039) files with added filename extension

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

    • Disables Task Manager via registry modification

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks