Case Study: Global Pharmaceutical Company achieves faster response and accurate detection of executive and brand impersonations with GreatHorn

Global pharmaceutical stalwart treats chronic phishing disease with more accurate detection and faster response

Global Pharmaceutical Company, a publicly traded biopharmaceutical organization with over 20,000 employees, was inundated with phishing—about 10,000 attacks a month—including targeted executive and brand impersonations (notably ADP lookalikes) that routinely bypassed their legacy secure email gateway and Office 365. To stop these sophisticated BEC and domain-lookalike threats without disrupting mail flow, they evaluated and adopted GreatHorn, leveraging GreatHorn’s API-based integration with Office 365 and cloud-based threat detection services.

GreatHorn was deployed quickly alongside the existing gateway, using patented domain lookalike detection, relationship analysis, executive impersonation identification and Link Protection for on‑click URL analysis. During a three-week pilot GreatHorn surfaced 6,800 impersonation attacks that had passed the gateway, and over a recent month identified more than 30,000 phishing attacks missed by both the gateway and Office 365 E5. Remediation times dropped dramatically (one post-deployment campaign of ~200 malicious emails was removed in under four minutes versus hours previously), reducing exposure and operational burden while improving visibility and protection.