From ec892dec93ef6bae20a90e8abb3f5274cefec7c2 Mon Sep 17 00:00:00 2001 From: Gavin Knapp Date: Fri, 24 Mar 2023 11:29:25 +0000 Subject: [PATCH] feat: new rule `proxy_susp_ipfs_cred_harvest.yml` (#4113) --- .../proxy_susp_ipfs_cred_harvest.yml | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 rules/web/proxy_generic/proxy_susp_ipfs_cred_harvest.yml diff --git a/rules/web/proxy_generic/proxy_susp_ipfs_cred_harvest.yml b/rules/web/proxy_generic/proxy_susp_ipfs_cred_harvest.yml new file mode 100644 index 000000000..0222e7bdb --- /dev/null +++ b/rules/web/proxy_generic/proxy_susp_ipfs_cred_harvest.yml @@ -0,0 +1,22 @@ +title: Suspicious Network Communication With IPFS +id: eb6c2004-1cef-427f-8885-9042974e5eb6 +status: experimental +description: Detects connections to interplanetary file system (IPFS) containing a user's email address which mirrors behaviours observed in recent phishing campaigns leveraging IPFS to host credential harvesting webpages. +references: + - https://blog.talosintelligence.com/ipfs-abuse/ + - https://github.com/Cisco-Talos/IOCs/tree/80caca039988252fbb3f27a2e89c2f2917f582e0/2022/11 + - https://isc.sans.edu/diary/IPFS%20phishing%20and%20the%20need%20for%20correctly%20set%20HTTP%20security%20headers/29638 +author: Gavin Knapp +date: 2023/03/16 +tags: + - attack.credential_access + - attack.t1056 +logsource: + category: proxy +detection: + selection: + cs-uri|re: '(?i)(ipfs\.io/|ipfs\.io\s).+\..+@.+\.[a-z]+' + condition: selection +falsepositives: + - Legitimate use of IPFS being used in the organisation. However the cs-uri regex looking for a user email will likely negate this. +level: low