Link: IPFS

 1name: "Link: IPFS"
 2description: "Detects messages containing links that have 'ipfs' in the domain, or unanalyzed links that contain 'ipfs' in the url. IPFS has been recently observed hosting phishing sites."
 3references:
 4  - "https://securelist.com/ipfs-phishing/109158/"
 5  - "https://docs.ipfs.tech/how-to/address-ipfs-on-web/"
 6type: "rule"
 7severity: "medium"
 8source: |
 9  type.inbound
10  and any(body.links,
11          // Any body link domains contain "ipfs"
12          (
13            strings.icontains(.href_url.domain.domain, "ipfs")
14            and not .href_url.domain.root_domain == "ipfs.com"
15          )
16  
17          // Or the path contains ipfs anchored to a leading and trailing '-', '/', '.'
18          or (
19            regex.icontains(.href_url.query_params, '[\.-/]ipfs[\.-/]')
20            and .href_url.domain.domain not in $org_domains
21            and (
22              (
23                // don't include high rep domains
24                .href_url.domain.domain not in $tranco_1m
25                and .href_url.domain.domain not in $umbrella_1m
26              )
27              // if it's in Tranco or Umbrella, still include it if it's one of these
28              or .href_url.domain.domain in $free_file_hosts
29              or .href_url.domain.root_domain in $free_file_hosts
30              or .href_url.domain.root_domain in $free_subdomain_hosts
31            )
32          )
33  )
34  
35  // adding negation block for legitimate domains with ipfs in their name
36  and not sender.email.domain.domain in ("shipfsl.com")
37  
38  // negate ipfs.com issues
39  and not any(recipients.to, .email.domain.domain == "ipfs.com")
40  and not (
41    sender.email.domain.root_domain is not null
42    and sender.email.domain.root_domain == "ipfs.com"
43    and headers.auth_summary.dmarc.pass
44  )
45  and (
46    not profile.by_sender().solicited
47    or (
48      profile.by_sender().any_messages_malicious_or_spam
49      and not profile.by_sender().any_messages_benign
50    )
51  )
52  and not profile.by_sender().any_messages_benign  
53attack_types:
54  - "Credential Phishing"
55  - "Malware/Ransomware"
56tactics_and_techniques:
57  - "Free file host"
58  - "Free subdomain host"
59  - "IPFS"
60detection_methods:
61  - "Sender analysis"
62  - "URL analysis"
63id: "19fa6442-83b9-5479-ba04-61906b595929"