Hafnium Update: Continued Microsoft Exchange Server Exploitation
Summary: A week after Microsoft disclosed zero-day vulnerabilities in Exchange Server that the actor Hafnium was using to steal emails, Cisco Talos reported that other groups separate from Hafnium were appearing in active incidents its response team was handling, including groups using infrastructure previously tied to cryptocurrency mining campaigns and actors creating or accessing web shells via notepad.exe or notepad++.exe. Talos said financial services were disproportionately affected, followed by health care, education, and local and state governments, and that scanning activity was heavy without successful exploitation.
What you should know: Talos notes it may already be too late for anyone who had an Exchange server exposed, which means patching is only the first step and the real question is whether an intruder has already established persistence inside your network.
Read the original at Cisco Talos ↗
- Topics
- Threat Actors & Nation-State
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