The CSS if() function provides a concise way to express conditional values. It accepts a series of condition-value pairs, delimited by semicolons. The function evaluates each condition sequentially and returns the value associated with the first true condition. If none of the conditions evaluate to true, the function returns an empty token stream.

I left a server online with VNC wide open to see how it would be interacted with. This is one of the more interesting interactions:

The data is stored in a non-relational DBMS of our own design, text-engine, whose data files on disks are encrypted, and the disks themselves are also encrypted.

But Telegram itself, of course, has both keys (and Pavel confirmed this in brackets in his article from August 2017 "Why Telegram Doesn't Use End-to-End Encryption by Default").

An outsider who removes the disk from the server will not be able to decrypt the data, but at the level of the running database, the messages are indeed not encrypted. Since I was working on anti-spam issues, I had access to them.

Endpoint Detection and Response (EDR), also referred to as endpoint detection and threat response (EDTR), is an endpoint security solution that continuously monitors end-user devices to detect and respond to cyber threats like ransomware and malware.

EDR is defined as a solution that "records and stores endpoint-system-level behaviors, uses various data analytics techniques to detect suspicious system behavior, provides contextual information, blocks malicious activity, and provides remediation suggestions to restore affected systems."

A user-mode code and its rootkit that will Kill EDR Processes permanently by leveraging the power of Process Creation Blocking Kernel Callback Routine registering and ZwTerminateProcess.

Summary:
- On May 29, 2025, a new Service Control feature was added for quota policy checks.
- This feature did not have appropriate error handling, nor was it feature flag protected.
- On June 12, 2025, a policy with unintended blank fields was inserted and replicated globally within seconds.
- The blank fields caused a null pointer which caused the binaries to go into a crash loop.

"If this had been flag protected, the issue would have been caught in staging."

^ Kinda reminds me of the CrowdStrike incident.

this is fine, as the OS can deallocate the terminated program faster than we can free memory

During device initialization, if the system identifies itself as a user terminal, the initialization script automatically writes 41 SSH public keys into /root/.ssh/authorized_keys. Notably, port 22 on the UTA remains open to the local network at all times. Having such a large number of unknown login keys on a user product certainly raises eyebrows.