Overview

overview

10

Static

static

3

2025-09-18...er.exe

windows10-2004-x64

10

2025-09-18...er.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    2025-09-18_47817a846aaf34c8aafa3e2db9b38435_cobalt-strike_mountlocker
  • Size 75KB
  • Sample250918-2kfzcsxlt3
  • SHA256 3d41a002c09448d74070a7eb7c44d49da68b2790b17337686d6dd018012db89d
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
quantumdefense_evasionransomware

Malware Config

Extracted

Path

  • C:\Users\Admin\README_TO_DECRYPT.html

  • quantum

Ransom Note
  • <html> <head> <title>Quantum</title> </head> <body> <h1>Your ID:</h1> <b> <pre> b8f5f7f554c55f68be05a0e357857bc43bd64170dc90623b82f6194e83291f44 </pre> </b> <hr/> This message contains an information how to fix the troubles you've got with your network.<br><br> Files on the workstations in your network were encrypted and any your attempt to change, decrypt or rename them could destroy the content.<br> The only way to get files back is a decryption with Key, provided by the Quantum Locker.<br><br> During the period your network was under our control, we downloaded a huge volume of information.<br> Now it is stored on our servers with high-secure access. This information contains a lot of sensitive, private and personal data.<br> Publishing of such data will cause serious consequences and even business disruption.<br><br> It's not a threat, on the contrary - it's a manual how to get a way out.<br> Quantum team doesn't aim to damage your company, our goals are only financial.<br><br> After a payment you'll get network decryption, full destruction of downloaded data, information about your network vulnerabilities and penetration points.<br> If you decide not to negotiate, in 48 hours the fact of the attack and all your information will be posted on our site and will be promoted among dozens of cyber forums, news agencies, websites etc.<br><br> To contact our support and start the negotiations, please visit our support chat.<br> It is simple, secure and you can set a password to avoid intervention of unauthorised persons.<br> <a href="http://c7hnws6zvlkp5td4cap3eyeempzzz55nm4cqfcuz6zlfjmqfyzl6otqd.onion/?cid=b8f5f7f554c55f68be05a0e357857bc43bd64170dc90623b82f6194e83291f44">http://c7hnws6zvlkp5td4cap3eyeempzzz55nm4cqfcuz6zlfjmqfyzl6otqd.onion/?cid=b8f5f7f554c55f68be05a0e357857bc43bd64170dc90623b82f6194e83291f44</a> <ul> <li>Password field should be blank for the first login. <li>Note that this server is available via Tor browser only. </ul> P.S. How to get TOR browser - see at https://www.torproject.org </body> </html>

Extracted

Path

  • C:\README_TO_DECRYPT.html

  • quantum

Ransom Note
  • <html> <head> <title>Quantum</title> </head> <body> <h1>Your ID:</h1> <b> <pre> b8f5f7f554c55f68be05a0e357857bc42ccb5861da83742e82f6194e83291f4c </pre> </b> <hr/> This message contains an information how to fix the troubles you've got with your network.<br><br> Files on the workstations in your network were encrypted and any your attempt to change, decrypt or rename them could destroy the content.<br> The only way to get files back is a decryption with Key, provided by the Quantum Locker.<br><br> During the period your network was under our control, we downloaded a huge volume of information.<br> Now it is stored on our servers with high-secure access. This information contains a lot of sensitive, private and personal data.<br> Publishing of such data will cause serious consequences and even business disruption.<br><br> It's not a threat, on the contrary - it's a manual how to get a way out.<br> Quantum team doesn't aim to damage your company, our goals are only financial.<br><br> After a payment you'll get network decryption, full destruction of downloaded data, information about your network vulnerabilities and penetration points.<br> If you decide not to negotiate, in 48 hours the fact of the attack and all your information will be posted on our site and will be promoted among dozens of cyber forums, news agencies, websites etc.<br><br> To contact our support and start the negotiations, please visit our support chat.<br> It is simple, secure and you can set a password to avoid intervention of unauthorised persons.<br> <a href="http://c7hnws6zvlkp5td4cap3eyeempzzz55nm4cqfcuz6zlfjmqfyzl6otqd.onion/?cid=b8f5f7f554c55f68be05a0e357857bc42ccb5861da83742e82f6194e83291f4c">http://c7hnws6zvlkp5td4cap3eyeempzzz55nm4cqfcuz6zlfjmqfyzl6otqd.onion/?cid=b8f5f7f554c55f68be05a0e357857bc42ccb5861da83742e82f6194e83291f4c</a> <ul> <li>Password field should be blank for the first login. <li>Note that this server is available via Tor browser only. </ul> P.S. How to get TOR browser - see at https://www.torproject.org </body> </html>

Targets

    • Target
      2025-09-18_47817a846aaf34c8aafa3e2db9b38435_cobalt-strike_mountlocker
    • Size 75KB
    • SHA256 3d41a002c09448d74070a7eb7c44d49da68b2790b17337686d6dd018012db89d
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    defense_evasionquantumransomware

    • Quantum Ransomware

      A rebrand of the MountLocker ransomware first seen in August 2021.

      ransomwarequantum

    • Quantum family

      quantum

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks