rules/proxy/proxy_chafer_malware.yml

title: Chafer Malware URL Pattern
id: fb502828-2db0-438e-93e6-801c7548686d
status: experimental
description: Detects HTTP requests used by Chafer malware
author: Florian Roth
date: 2019/01/31
references:
    - https://securelist.com/chafer-used-remexi-malware/89538/
logsource:
    category: proxy
detection:
    selection:
        c-uri|contains: '/asp.asp?ui='
    condition: selection
fields:
    - ClientIP
    - c-uri
    - c-useragent
falsepositives:
    - Unknown
level: critical
tags:
    - attack.command_and_control
    - attack.t1071.001
    - attack.t1043  # an old one
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`title: Chafer Malware URL Pattern`
Added UUIDs to rules 2019-11-12 23:12:27 +01:00			`id: fb502828-2db0-438e-93e6-801c7548686d`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`status: experimental`
			`description: Detects HTTP requests used by Chafer malware`
			`author: Florian Roth`
			`date: 2019/01/31`
Second round 2020-09-15 07:02:30 -06:00			`references:`
			`- https://securelist.com/chafer-used-remexi-malware/89538/`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`logsource:`
			`category: proxy`
			`detection:`
			`selection:`
Update proxy_chafer_malware.yml 2020-10-15 23:16:17 -03:00			`c-uri\|contains: '/asp.asp?ui='`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`condition: selection`
			`fields:`
			`- ClientIP`
Fixed proxy rule field names 2019-12-07 00:11:33 +01:00			`- c-uri`
			`- c-useragent`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`falsepositives:`
			`- Unknown`
			`level: critical`
Second round 2020-09-15 07:02:30 -06:00			`tags:`
			`- attack.command_and_control`
			`- attack.t1071.001`
Update proxy_chafer_malware.yml 2020-10-15 23:16:17 -03:00			`- attack.t1043 # an old one`