Cybersecurity researchers have uncovered a malicious cryptocurrency stealer malware that was distributed via 13 malicious NuGet packages as part of a supply chain attack targeting .NET developers.
The 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 uses a rare obfuscation technique, called ‘.NET AoT compilation’, to make the binary hard to reverse engineer.
Additionally, the second-stage payload has an auto-update mechanism to retrieve new versions of the executable from a remote location.
The findings highlight the need for safety measures to be taken at every step of the software development lifecycle to ensure the software supply chain remains secure.
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