rules/proxy/proxy_chafer_malware.yml

title: Chafer Malware URL Pattern
id: fb502828-2db0-438e-93e6-801c7548686d
status: test
description: Detects HTTP requests used by Chafer malware
author: Florian Roth
references:
  - https://securelist.com/chafer-used-remexi-malware/89538/
date: 2019/01/31
modified: 2021/11/27
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
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`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`status: test`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`description: Detects HTTP requests used by Chafer malware`
			`author: Florian Roth`
Second round 2020-09-15 07:02:30 -06:00			`references:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`- https://securelist.com/chafer-used-remexi-malware/89538/`
			`date: 2019/01/31`
			`modified: 2021/11/27`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`logsource:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`category: proxy`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`detection:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`selection:`
			`c-uri\|contains: '/asp.asp?ui='`
			`condition: selection`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`fields:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`- ClientIP`
			`- c-uri`
			`- c-useragent`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`falsepositives:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`- Unknown`
Rule: Chafer malware proxy pattern 2019-01-31 12:31:48 +01:00			`level: critical`
Second round 2020-09-15 07:02:30 -06:00			`tags:`
$frack113$ Change status for old rules 2021-11-27 11:33:14 +01:00			`- attack.command_and_control`
			`- attack.t1071.001`