Observed IOC: Malicious domains in body links

calendar May 19, 2026  ·
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Detects inbound messages containing links to known malicious domains in the message body. IOC list is automatically managed and hashed by the IOC pipeline from the private threat intelligence feed.

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 1name: "Observed IOC: Malicious domains in body links"
 2description: "Detects inbound messages containing links to known malicious domains in the message body. IOC list is automatically managed and hashed by the IOC pipeline from the private threat intelligence feed."
 3type: "rule"
 4severity: "high"
 5source: |
 6  // AUTO-GENERATED IOC LIST - DO NOT EDIT MANUALLY
 7  // Managed by automated IOC system
 8  type.inbound
 9  and any(body.current_thread.links,
10          hash.sha256(.href_url.domain.domain) in (
11            '104b59a4731112a6ae479060f985b6ea2bdf026c2364066d8b4810c1fa591893', // Observed malicious credential phishing link domain
12            '217c4901d032661cb4b6cbfe89d73f7dfab3ea90df594c52e7b8b5f89f7addaf', // Observed malicious credential phishing link domain
13            '445753e02403e3c831b2790e7b07f18f99c9a822f4cb2ccd7d5bc1ab6ca7451c', // Observed malicious credential phishing link domain
14            '8be652e049830c8619e6495f550b85326491cec7b89d7718a8cbf9df635195a5', // Observed malicious credential phishing link domain
15            '97e023dc6c17e035ffad3753f361b4ef9bf06c502ef8746d2df92a2b6333d960', // Observed malicious credential phishing link domain
16            'a3258c1b4241a2e597c343ea46b6c0d287bc91d5c662d2c29cf42a6b29c07bed', // Observed malicious credential phishing link domain
17            'd0c1e10bdae01882db320da54ffe233b35b962cef5a703c0aa212931c95d2f9b', // Observed malicious credential phishing link domain
18            'db42baff2fd8669be0b3253a697a9d91ec3d8af1bd5387c70622fdc79f1d0526', // Observed malicious credential phishing link domain
19            'ea0d7829c0ab56a6bfdf97575a9881639b7dccc5b40acfbae094da1900bda9f5', // Observed malicious credential phishing link domain
20            'ebd6ee41423ffa71f8d1c34d2b7b37df421ac333cf44bde86c42c6a8d189f4ac', // Observed malicious credential phishing link domain
21            'fe5d28deb522bb09961654bae29b27f28b21f8709d1968546e4644d23c324093' // Observed malicious credential phishing link domain
22          )
23  )  
24
25attack_types:
26  - "Credential Phishing"
27  - "Malware/Ransomware"
28tactics_and_techniques:
29  - "Evasion"
30  - "Social engineering"
31detection_methods:
32  - "URL analysis"
33  - "Content analysis"
34id: "e4f5a6b7-c8d9-4e1f-8a3b-c4d5e6f7a8b9"
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