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UNK_QuietRacket is an espionage-focused threat activity cluster tracked by Proofpoint. Its observed campaigns began on September 3, 2026, targeting government, consulting, and financial-sector organizations in Indonesia and Singapore. The cluster uses spearphishing links disguised as Indonesian conference invitations to direct victims to sites hosting the BlueMoon exploit kit. BlueMoon compromises Chromium-based browsers on Windows by chaining V8 code execution and sandbox escape with Windows local privilege escalation. Its exploitation chain includes CVE-2026-85046 and CVE-2026-85880, fingerprints the victim's system, and injects code into the parent Chrome broker process. UNK_QuietRacket uses a modified delivery stage to deploy a DLL-sideloading pair, whose malicious DLL retrieves and executes a .NET assembly in memory. The payload establishes persistence through a scheduled task that relaunches the sideloading sequence. The cluster resolves command-and-control infrastructure through Google's DNS-over-HTTPS service, using TXT records containing ChaCha20-encrypted address information, and subsequently communicates with Cloudflare Workers. Although it shares BlueMoon with other espionage clusters, UNK_QuietRacket is tracked as a distinct activity cluster rather than an alias or subgroup of those operators.
Who, where, and from where this actor operates. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
Attributed origin per open-source reporting.
25 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt.
1 malware family Mallory has associated with this actor across public reporting.
3 CVEs Mallory has associated with this actor across public reporting. 3 of them are exploited in the wild (not necessarily by this actor).
27 indicators attributed to this actor. Values are masked here and available in full in Mallory.
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.