Threat report

news.sophos.com/en-us/2021/04/13/compromised-exchange-server-hosting-cryptojacker-targeting-other-exchange-servers

https://news.sophos.com/en-us/2021/04/13/compromised-exchange-server-hosting-cryptojacker-targeting-other-exchange-servers/

Published on: news.sophos.com

ATT&CK techniques those detections carry

T1027Obfuscated Files or Information
T1105Ingress Tool Transfer

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4 published detections cite this

Citing it, not covering it: each of these was written with this as evidence, and carries the source it came from and the licence it was published under.

Detections citing this reference
Detection	Severity	Source	Published	Licence
Suspicious File Downloaded From File-Sharing Website Via Certutil.EXE	High	SigmaHQ	Aug 26, 2026	Detection Rule License 1.1
Suspicious File Downloaded From Direct IP Via Certutil.EXE	High	SigmaHQ	Aug 26, 2026	Detection Rule License 1.1
Suspicious Download Via Certutil.EXE	Medium	SigmaHQ	Aug 26, 2026	Detection Rule License 1.1
File Decoded From Base64/Hex Via Certutil.EXE	High	SigmaHQ	Aug 26, 2026	Detection Rule License 1.1

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