The BlackByte ransomware gang has attacked Kisco Senior Living. Kisco Senior Living owns 25 and operates 22 senior living communities across six states. It was founded in 1990 and is headquartered in Carlsbad, California. BlackByte published Kisco Senior Living to its data leak site on June 16th, claiming to have stolen company documents and data. Starting in July 2021, BlackByte, a ransomware operation, began targeting corporate victims across the globe. Victims first discovered the group when they needed assistance decrypting their files. BlackByte, a Russian-based ransomware group, operates on a ransomware-as-a-service (RaaS) model and uses double-extortion tactics to compel victims to pay. Within their initial year, the Federal Bureau of Investigation (FBI) and the US Secret Service (USS) took notice of BlackByte's activities and issued a joint advisory warning about the group. BlackByte initially operated with limited activity. Early reports indicated that BlackByte's level of activity was not as high as other ransomware operations, but it attracted the attention of researchers. Their ransomware capabilities did not pose the most significant threat. In the previous version of BlackByte, the same key was utilized for file encryption in every campaign. The group employed AES, a symmetric key algorithm, enabling researchers to develop a decrypter to assist victims affected by BlackByte. Consequently, the group modified their encryption approach in newer versions. Around February 2022, they transitioned from C# to GoLang. This trend aligns with ransomware groups opting for programming languages like GoLang and Rust, which have limited familiarity. This choice makes static analysis more challenging compared to commonly used programming languages like C#. Security products have long relied on signatures from well-known languages, making the analysis of different language signatures considerably more difficult.
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