YARA · SEKOIA.IO Community
SEKOIA_Unk_Quad7_Fsynet_Strings
Matches node-r-control, asr_node, node-relay
- Author
- Sekoia.io
- Date
- 2024-08-20
- Modified
- 2024-12-19
- Score / Quality
- 75 / 80
What this rule detects
Matches node-r-control, asr_node, node-relay
Targets: Linux ELF.
It defines 11 patterns (11 text, 0 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
unk-quad7-fsynet-strings.yarDetection Rule License 1.1
rule SEKOIA_Unk_Quad7_Fsynet_Strings : FILE
{
meta:
= "Matches node-r-control, asr_node, node-relay"
= "Sekoia.io"
= "897b2421-c177-48c0-8f5b-82d8434208cb"
= "2024-08-20"
= "2024-12-19"
= "https://github.com/SEKOIA-IO/Community"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/unk_quad7_fsynet_strings.yar#L1-L33"
= "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
= "f42849076e24b7827218f7a25bc11ccc"
= "b3b09819f820a4ecd31f82f369000af2"
= "92093dd7ba6ae8fe34a215c4c4bd1cd4"
= "e6f6a6de285d7c2361c32b1f29a6c3f6"
= "408152285671bbd0e6e63bd71d6abaaf"
= "5efc7d824851be9ec90a97d889a40d23"
= "960119a025dedae7c5dfdf872cd515e2b6cf2999179ba84374d547047316caa2"
= 75
= 80
= "FILE"
= "1.0"
= "TLP:CLEAR"
strings:
$ = "prev_hop_port"
$ = "next_hop_port"
$ = "back_hop_port"
$ = "next_tsn_port"
$ = "prev_hop_ip"
$ = "next_hop_ip"
$ = "back_hop_ip"
$ = "next_tsn_ip"
$ = "ikcp_"
$ = "/tmp/log_r"
$ = "total_hop"
condition:
uint32be( 0 ) == 0x7f454c46 and filesize < 5MB and 6 of them
}
Strings (11 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $ | text | "prev_hop_port" | |
| $ | text | "next_hop_port" | |
| $ | text | "back_hop_port" | |
| $ | text | "next_tsn_port" | |
| $ | text | "prev_hop_ip" | |
| $ | text | "next_hop_ip" | |
| $ | text | "back_hop_ip" | |
| $ | text | "next_tsn_ip" | |
| $ | text | "ikcp_" | |
| $ | text | "/tmp/log_r" | |
| $ | text | "total_hop" |
Condition
uint32be( 0 ) == 0x7f454c46 and filesize < 5MB and 6 of themIn plain words (Heuristic)
- The file must start with the ELF header — a Linux/Unix executable.
- The file must be smaller than 5MB (a cheap guard that skips large files).
- At least 6 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
References
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- f42849076e24b7827218f7a25bc11ccc
- b3b09819f820a4ecd31f82f369000af2
- 92093dd7ba6ae8fe34a215c4c4bd1cd4
- e6f6a6de285d7c2361c32b1f29a6c3f6
- 408152285671bbd0e6e63bd71d6abaaf
- 5efc7d824851be9ec90a97d889a40d23
Licence & attribution
Author: Sekoia.io
Source repository: SEKOIA.IO Community @ a438a5901a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 897b2421-c177-48c0-8f5b-82d8434208cb
Metadata
| version | 1.0 |
|---|---|
| classification | TLP:CLEAR |
Tags:FILE
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