The Manual Phishing Investigation Bottleneck
This case study examines a security organization struggling with approximately 1,000 user-reported phishing emails monthly, with each incident requiring an average of 40 minutes of manual analyst investigation. The five-step manual process—opening emails, checking headers and links, examining attachments, reviewing sender history, and documenting findings—consumed hundreds of analyst hours that could have been directed toward strategic security initiatives like data loss prevention (DLP) implementation. The volume created a dangerous dynamic where analysts faced repetitive, tedious work that increased human error risk while genuine high-severity threats could slip through unnoticed amid the noise of false positives and low-risk reports.
Automated Response with Managed XSIAM
Rather than treating user-reported phishing emails as tickets requiring human review, Managed XSIAM (MSIAM) transformed them into automated triggers that executed pre-designed playbooks. The system pulled context from Microsoft 365, evaluated user risk in real time, checked IP reputation, and calculated severity automatically—then took direct action by deleting high-risk messages from all inboxes across the enterprise without waiting for analyst confirmation. This approach reduced mean time to resolve (MTTR) by over 90%, dropping investigation time from 40 minutes to approximately 3 minutes per incident. The automation proved its value during a holiday period when the SOC was offline: MSIAM autonomously blocked 10 high-severity phishing attacks and processed 400 total incidents without any manual intervention.
Beyond Traditional MDR: Removing Work, Not Just Alerting
The fundamental difference between traditional managed detection and response (MDR) and Managed XSIAM lies in ownership of the response phase. Traditional MDR identifies threats and escalates them to human analysts for decision-making and action, while MSIAM executes the entire response workflow autonomously at machine speed and enterprise scale. This shift required building trust over time—the organization initially allowed automation only for enrichment while retaining manual response control, but eventually handed over full response authority after seeing consistent results. The outcome freed the SOC team to focus on strategic security projects rather than repetitive email analysis, fundamentally changing how the organization allocated its most valuable resource: expert analyst time.
