TEMP_Heretic
- Origin
- CN
- Primary motivation
- espionage
- Sophistication
- intermediate
- Resource level
- team
- Actor type
- nation-state
- Profile updated
- 2026-07-07 12:09:27
Targeted industries: government-and-public-sector media-and-entertainment defense-and-aerospace
Context
TEMP_Heretic is a threat actor that has been observed engaging in targeted spear-phishing campaigns. They exploit vulnerabilities in email platforms, such as Zimbra, to exfiltrate emails from government, military, and media organizations. They use multiple outlook.com email addresses and manually craft content for each email before sending it.
Reports & references
- ESET — Mass Spreading Campaign Targeting Zimbra Users (report)
- volexity.com — Operation Emailthief Active Exploitation Of Zero Day Xss Vulnerability In Zimbra (report)