Since late 2024, Unit 42 researchers have been tracking a cluster of suspicious activity as CL-STA-1020, targeting governmental entities in Southeast Asia. The threat actors behind this cluster of activity have been collecting sensitive information from government agencies, including information about recent tariffs and trade disputes.
This campaign is particularly noteworthy due to its novel tradecraft. The threat actors have developed a previously undocumented Windows backdoor, which we named HazyBeacon. This backdoor leverages AWS Lambda URLs as command and control (C2) infrastructure. AWS Lambda URLs are a feature of AWS Lambda that allows users to invoke serverless functions directly over HTTPS.
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Source: Palo Alto Unit 42
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