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Indicators are what attackers leave behind. Stolen credentials are what they arrive with.

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6 IOCs

Cleaning Out Inboxes: TA488 Comes for Outlook with Another Half-Click Exploit

Proofpoint Threat Insight
Proofpoint Threat Insight
Published July 29, 2026Original Report

Threat Actors

Malware Families

Excerpt

Threat Research would like to thank the Proofpoint Cloudmark Authority team for their collaboration. Key Findings On 22 July 2026, one day prior to Proofpoint’s recent joint release with the NSA on Russia-aligned threat actor TA488 (Void Blizzard, Laundry Bear), the actor began a campaign abusing CVE-2026-42897, a cross-site scripting (XSS) vulnerability in Outlook Web Access (OWA). The campaign targeted US and European government entities, as well as…

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Diamond Model

SOCIAL AXISTECHNOLOGY AXISADVERSARYTA488INFRASTRUCTUREasecdns.comdnsrecursive.euacocdn.comCAPABILITYCobalt StrikeVICTIMunknown
Adversary(1)
Infrastructure(4)
Capability(1)
Victim

Indicators of Compromise

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6 indicators

TypeIndicatorConfidenceScoreFirst Seen
Domainasecdns.comHighScore 86/100First seen
SHA2566897b649f29e54d8910459963bbf94ed5c7a4fe66a56bc5962540b226b8e48c4HighScore 85/100First seen
Domaindnsrecursive.euMediumScore 43/100First seen
CVECVE-2026-42897HighScore 69/100First seen
Domainacocdn.comHighScore 86/100First seen
Domaintdndns.comMediumScore 43/100First seen

IOC Relationship Graph

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