SigmaHQ/rules/proxy/proxy_chafer_malware.yml

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title: Chafer Malware URL Pattern
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id: fb502828-2db0-438e-93e6-801c7548686d
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status: experimental
description: Detects HTTP requests used by Chafer malware
author: Florian Roth
date: 2019/01/31
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references:
- https://securelist.com/chafer-used-remexi-malware/89538/
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logsource:
category: proxy
detection:
selection:
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c-uri|contains: '/asp.asp?ui='
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condition: selection
fields:
- ClientIP
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- c-uri
- c-useragent
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falsepositives:
- Unknown
level: critical
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tags:
- attack.command_and_control
- attack.t1071.001
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- attack.t1043 # an old one