Detection rules › Sigma
Suspicious Network Communication With IPFS
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.
Known false positives
- Legitimate use of IPFS being used in the organisation. However the cs-uri regex looking for a user email will likely negate this.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Credential Access | |
| Collection |
Rule body
title: Suspicious Network Communication With IPFS
id: eb6c2004-1cef-427f-8885-9042974e5eb6
status: test
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.collection
- 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
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
cs-uri|re: '(?i)(ipfs\.io/|ipfs\.io\s).+\..+@.+\.[a-z]+'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
cs-uri | regex_match |
| field:"cs-uri" kind:regex_match value:"(?i)(ipfs.io/|ipfs.io\s).+..+@.+.[a-z]+" |