The Schrodinger Cat ‘.suncraft’ Ransomware Recovery

In our recovery lab today at Lockbit Decryptor, we isolated the Schrodinger Cat ransomware strain, identified by the .suncraft extension and a ransom note referencing the “Schrodinger Cat” persona. Our forensic analysis confirms this is a sophisticated, enterprise-targeting ransomware operation. This strain employs a robust hybrid cryptosystem. Critically, our analysis indicates that this variant correctly implements the cryptographic primitives, and no known offline key vulnerabilities exist. Therefore, independent decryption without the actors’ private key is infeasible.

Latest: The CryTox/Waiting (.wait) Ransomware Variant Recovery and Decryption

EMERGENCY TRIAGE (THE GOLDEN HOUR)

If you encounter the .suncraft extension, execute these four protocols immediately to limit the blast radius:

1. Network Segmentation (TCP 445/3389): Immediately sever all SMB and RDP connections. Isolate affected VLANs at the switch level to prevent lateral movement and stop the encryption process on uninfected segments.
2. Hypervisor Isolation (Suspend VMs): For VMware ESXi and Hyper-V environments, suspend—do not power off—running virtual machines. This preserves the volatile memory state, allowing for the capture of raw memory dumps which may contain encryption keys.
3. Credential Flush (AD Reset): Assume total identity compromise. Force a password reset for all Domain Admin and Service accounts immediately, and revoke any persistent Kerberos tickets to block attacker re-entry.
4. Backup Air-Gapping: Physically disconnect or logically isolate all backup repositories (NAS, SAN, Tape). Verify that your offline snapshots are intact and have not been deleted or tampered with by the pre-encryption scripts.

Also read: The GodDamn (‘.God8Damn’) Ransomware : Forensic Recovery Guide

THREAT PROFILE & FORENSICS

Technical Specifications:

File Extension Example: companyfile.QBW.suncraft

Persistence Markers:

• Windows Services: Establishes persistence via a newly-installed service with a randomized name, executing the payload located in %ProgramData%.
• Scheduled Tasks: Utilizes schtasks.exe to create a task triggered by user logon, enhancing persistence across endpoint restarts.
• Virtualization Artifacts: The Schrodinger Cat source code includes modules for targeting ESXi, encrypting VMs stored on attached datastores.

Ransom Note Text:

42F474637ABA01B5C36F046D8AEF1C6FABC7158E17F27FA4A7F33ACF1C8341
9667FE4409699252E2C7859FCD6B859C4BD590D8A4CED78FA3332F823C2F79
...
           Hello
                  Schrodinger Cat welcome you!

Your network was encrypted.

Encryption is reverssible process, your data can be recovered with our help
We offer you to purchase special decryption software, payment includes decryptor + key for it .

We have studied carefully financial documentation of your company and offer you an affordable price for our services.

price for your company: 0.50 BTC  (price for all PC!!!)
BTC: bc1q***********hegv
The full wallet number you can get from our support service. 
The first and last symbols of  wallet must match those presented in this txt document.

!IMPORTANT!
Don't modify encrypted files.
Don't inform local authorities about this incident You always can complain about us when our deal will be completed. 
Otherwise, process may be delayed through no fault of ours, and you will have your business stopped for a longer period while investigation lasts, and it may last for years :)
Don't hire «Helpers» to negotiate with us.
We guarantee that our dialogue will be private and third-parties will never know about our deal!
Pleas contact us directly, avoid communicating with helper-services, they often take money and do not send it to us, assuring customers that deal failed through no fault of theirs.
At same time, leaving money to yourself, and client is informed that money were transferred to us.
The guarantee of successful deals is only a direct contact!
If you decide to negotiate not own - we can request confirmation of the negotiator's authority directly from company.
Please do not ignore these requests - otherwise negotiations will reach an impasse and problem not will be resolved.
Don't shy... It's just business for us and we are always ready for polite and mutually beneficial communication.

__________________________________________
Contact us:

Preferred option - ToxChat
ToxID: A50CB9494D37739906E73E1D2B3D39DD7139A78ABA24D7B064E905ACF9445A09CA461796AC0E
you can download Tox client from official website: https://tox.chat/download.html


Option 2 - email: rayhelper@protonmail.com
__________________________________________



thx...

MATHEMATICAL VULNERABILITY ANALYSIS

Schrodinger Cat employs a cryptographically sound hybrid system. Per-file data is encrypted using AES-256 in CBC mode. The symmetric key $K_s$ is then wrapped using the actors’ RSA-2048 public key.

$$Ciphertext, IV = Enc_{AES-256-CBC}(K_s, P)$$
$$Wrapped_Key = Enc_{RSA-PKCS#1v1.5}(PK_{attacker}, K_s)$$

Cryptographic Implementation Assessment:
Our laboratory’s analysis concludes that no known implementation flaw exists in this Schrodinger Cat variant’s cryptographic construction. The use of a unique, random IV for each file and the robust AES-CBC mode eliminate common attack vectors. The RSA padding scheme, while older, is implemented correctly. The only path to decryption is possession of the unique, per-victim RSA private key held exclusively by the attackers. Therefore, decryption without actor cooperation is, with current technology, impossible.

IT ADMIN TOOLKIT (POWERSHELL AUDIT)

Deploy this script to conduct a thorough sweep for Schrodinger Cat-related IOCs across your fleet.

# Lockbit Decryptor Audit Script for Schrodinger Cat Variant
Write-Host "Initiating forensic sweep for Schrodinger Cat IOCs..." -ForegroundColor DarkBlue

# 1. Detect Files with the .suncraft Extension
Get-ChildItem -Path C:\ -Recurse -Include "*.suncraft" -ErrorAction SilentlyContinue -Depth 3 | 
    Group-Object { $_.Extension } | 
    Where-Object { $_.Count -gt 5 } | 
    ForEach-Object { Write-Host "Potential Schrodinger Cat Cluster Detected: '$($_.Name)' affecting $($_.Count) files." }

# 2. Locate Ransom Notes
Get-ChildItem -Path C:\ -Filter '*.txt' -Recurse -Force -ErrorAction SilentlyContinue -Depth 3 | 
Where-Object { (Get-Content $_.FullName -Raw) -match 'Schrodinger Cat' } | 
Select-Object -First 100 FullName, LastWriteTimeUtc

# 3. Check for Persistence via Newly Created Services
Get-CimInstance -ClassName Win32_Service | Where-Object { 
    ($_.StartTime -gt (Get-Date).AddDays(-3)) -and 
    ($_.StartName -eq 'LocalSystem') -and 
    ($_.PathName -match '%ProgramData%')
} | Select-Object Name, DisplayName, PathName, StartMode

RECOVERY PATHWAYS & CTA

Strategic Recovery Roadmap:

• Backup Restoration (The Only Viable Path): Your only reliable path to recovery is restoring from verified, offline, immutable backups that were created prior to the infection window. All other options are non-viable.
• Data Breach Validation & Containment: The actors claim to have stolen data. Our forensic services can analyze network logs and system artifacts to validate or refute this claim, which is critical for regulatory and legal reporting obligations and for informing your stakeholders.
• Ignore the Actors’ Negotiations: Engaging with the provided Tox ID or email address is a high-risk financial transaction with no guarantee of receiving a functional decryptor.
• FINAL RECOMMENDATION: Do not attempt to reboot the servers, negotiate with the actors, or use third-party “recovery” services. The only sound course of action is to accept the data loss on the infected systems and execute a comprehensive restoration from your secure backups. Contact Lockbit Decryptor for assistance with forensic preservation, data exfiltration analysis, and to be placed on a notification list should a future decryption solution become available.

Also read: The Vile (.vile) Ransomware : A Definitive Forensic Recovery Guide

Contact Us To Purchase The Vile Decryptor Tool