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SEKOIA_Tool_Nping_Strings

Detects NPing

Hack toolSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-08-11
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects NPing

Targets: Windows PE, Linux ELF.

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
tool-nping-strings.yarDetection Rule License 1.1
rule SEKOIA_Tool_Nping_Strings : FILE
{
	meta:
		description = "Detects NPing"
		author = "Sekoia.io"
		id = "fcfd9539-b224-45b4-9252-0b4d56a40be4"
		date = "2022-08-11"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_nping_strings.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "0c7216438e9c974d889e4ccc8cdb99ab18d1dc403820d60914b80ff9bc4528fa"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "http://nmap.org/nping"
		$ = "nping scanme.nmap.org"
		$ = "Bogus target structure passed to %s"
		$ = "Packet too short."
		$ = "read_arp_reply_pcap"

	condition:
		( uint32be( 0 ) == 0x7f454c46 or uint16be( 0 ) == 0x4d5a ) and 3 of them and filesize < 1MB
}

Strings (5 patterns)

IdentifierTypeValueModifiers
$text"http://nmap.org/nping"
$text"nping scanme.nmap.org"
$text"Bogus target structure passed to %s"
$text"Packet too short."
$text"read_arp_reply_pcap"

Condition

( uint32be( 0 ) == 0x7f454c46 or uint16be( 0 ) == 0x4d5a ) and 3 of them and filesize < 1MB

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must start with the ELF header — a Linux/Unix executable.
  • The file must be smaller than 1MB (a cheap guard that skips large files).
  • At least 3 patterns in the rule must match.

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References

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: fcfd9539-b224-45b4-9252-0b4d56a40be4

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE

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