Cryptocurrency Stealer Malware Distributed via 13 NuGet Packages
Apr 11, 2023
Software Security / Cryptocurrency
Cybersecurity researchers have detailed the inner workings of the cryptocurrency stealer malware that was distributed via 13 malicious NuGet packages as part of a supply chain attack targeting .NET developers. The sophisticated typosquatting campaign, which was uncovered by JFrog late last month, impersonated legitimate packages to execute PowerShell code designed to retrieve a follow-on binary from a hard-coded server. The two-stage attack culminates in the deployment of a .NET-based persistent backdoor, called Impala Stealer, which is capable of gaining unauthorized access to users' cryptocurrency accounts. "The payload used a very rare obfuscation technique, called '.NET AoT compilation,' which is a lot more stealthy than using 'off the shelf' obfuscators while still making the binary hard to reverse engineer," JFrog told The Hacker News in a statement. .NET AoT compilation is an optimization technique that allows apps to be ahead-of-time c