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Bug #3103
closed--engine-analysis warning for flow on an icmp request rule
Affected Versions:
Effort:
Difficulty:
Label:
Description
using latest git master at the moment of this report -
5.0.0-dev (3a91244 2019-07-22)
I have the following warning on
== Sid: 2027763 ==
alert icmp any any -> any any (msg:"ET TROJAN Possible ICMP Backdoor Tunnel Command - whoami"; itype:8; icode:0; content:"whoami"; depth:6; nocase; metadata: former_category TROJAN; reference:url,www.hackingarticles.in/command-and-control-tunnelling-via-icmp; classtype:trojan-activity; sid:2027763; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, deployment Perimeter, signature_severity Major, created_at 2019_07_29, performance_impact Moderate, updated_at 2019_07_29;)
Rule matches on packets.
Rule contains 1 content options, 0 http content options, 0 pcre options, and 0 pcre options with http modifiers.
Fast Pattern "whoami" on "payload" buffer.
Warning: Rule is inspecting both the request and the response.
where the rules is inspecting itype:8; icode:0;
Updated by Andreas Herz over 5 years ago
- Assignee set to OISF Dev
- Target version set to TBD
Updated by Victor Julien about 5 years ago
- Status changed from New to Assigned
- Assignee changed from OISF Dev to Jeff Lucovsky
- Target version changed from TBD to 5.0.1
Updated by Jeff Lucovsky about 5 years ago
Since this is an ICMP echo (with code 0), the warning re: both request and response is invalid?
Currently, the analyzer is ICMP-agnostic and many, but not all, ICMP type values are request or response, but not both.
Please confirm that this is the concern.
Updated by Jeff Lucovsky about 5 years ago
- Status changed from Assigned to Closed
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