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Each shard is also stored on a different server. Also, choosing the right index type is crucial. Sharding and Partitioning Divide the data into smaller, more manageable chunks known as shards. Denormalization Denormalization combines data into fewer tables to reduce the overhead of joins, improving read performance.
At the beginning of the month, Microsoft released an advisory and security patch for a serious Windows Server Message Block (SMB) vulnerability called the Windows SMBv3 Client/Server Remote Code Execution Vulnerability (AKA Windows SMBv3 RCE or CVE-2020-0796). Windows SMBv3 RCE isnt the first vulnerability in SMB.
But what makes the attack so unusually virulent is how it exploits a vulnerability in the Windows SMBprotocol. SMB is used by Windows machines for sharing files and the ransomware uses SMB to spread to other vulnerable devices on a network. Like many ransomware attacks, WannaCrypt leverage phishing as an attack vector.
An attacker can craft a.MSG file as a e form of a calendar invite that triggers an authentication attempt over the SMBprotocol to an attacker-controlled endpoint without any user interaction. (.MSG Only SMB sessions terminating at known, trusted servers should be allowed.
Windows SMBv3 Denial of Service Zero-Day One issue that was not covered widely in the news is a zero-day attack discovered in Microsoft Windows SMBv3, the popular enterprise protocol for file and printer sharing. The POC was able to generate the so called Blue Screen of Death on Windows clients that connects into a compromised SMBserver.
They typically gain initial access through phishing emails, social engineering, supply chain attacks, and Remote Desktop Protocol (RDP) exploits. One of the key features of RoboCopy is its ability to handle SMB (Server Message Block) traffic. RoboCopy supports various options and switches that enhance its functionality over SMB.
Like WannaCry, NotPetya leverages the SMBprotocol to move laterally across the network, an EternalBlue exploit attributed to the National Security Agency (NSA) and leaked by the Shadow Brokers hacking group last April. Attackers allegedly planted the malware in the companys update servers.
Internet Firewall Rules enforce company-driven access policies to Internet websites and apps based on app name, category, port, protocol and service. All security engines ( IPS , Anti-Malware, Next-Generation Anti-Malware) are enabled globally and scan all ports and protocols with exceptions created only when needed.
Comparing flow protocols for real-world large-scale networks. A lot of ink has been spilled over the years on the topic of flow protocols, specifically how they work and their relative accuracy. One of the things that can be rather confusing is that there are a lot of different flow protocol names.
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