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DITEKSHEN_INDICATOR_TOOL_Ngrok

Detects Ngrok

Suspicious / huntingditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-09-25
Score / Quality
75 / 75

What this rule detects

Detects Ngrok

Targets: Windows PE.

It defines 6 patterns (6 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
indicator-tool-ngrok.yarBSD 2-Clause License
rule DITEKSHEN_INDICATOR_TOOL_Ngrok : FILE
{
	meta:
		description = "Detects Ngrok"
		author = "ditekSHen"
		id = "fc0a0de8-b68b-5b6b-a222-bbc031ebabd3"
		date = "2020-11-06"
		modified = "2024-09-25"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/indicator_tools.yar#L1405-L1418"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "f4bba142652aaf77e5b7c123b743cf165ae17210c39cf65b7311f7e7bd91f7e1"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "dashboard.ngrok.com" ascii
		$s2 = "go.ngrok.com/cmd/ngrok/main.go" ascii
		$s3 = "ngrok agent" ascii
		$s4 = "*ngrok.clientInfo" ascii
		$s5 = "'%s'  socket: '%s'  port: %d/edges/https/{{ .EdgeID }}/routes/{{ .ID }}/webhook_" ascii
		$s6 = "/{{ .ID }}/tunnel_sessions/{{ .ID }}/restart" ascii

	condition:
		( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x457f or uint16( 0 ) == 0xfacf ) and ( 3 of them )
}

Strings (6 patterns)

IdentifierTypeValueModifiers
$s1text"dashboard.ngrok.com"ascii
$s2text"go.ngrok.com/cmd/ngrok/main.go"ascii
$s3text"ngrok agent"ascii
$s4text"*ngrok.clientInfo"ascii
$s5text"'%s' socket: '%s' port: %d/edges/https/{{ .EdgeID }}/routes/{{ .ID }}/webhook_"ascii
$s6text"/{{ .ID }}/tunnel_sessions/{{ .ID }}/restart"ascii

Condition

( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x457f or uint16( 0 ) == 0xfacf ) and ( 3 of them )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 3 patterns in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

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

Rule id: fc0a0de8-b68b-5b6b-a222-bbc031ebabd3

Tags:FILE

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