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SEKOIA_Tool_Tacticalrmm_Installer_Strings

Detects TacticalRMM installer

Hack toolSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2024-05-23
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects TacticalRMM installer

Targets: Windows PE, Linux ELF.

It defines 4 patterns (4 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
tool-tacticalrmm-installer-strings.yarDetection Rule License 1.1
rule SEKOIA_Tool_Tacticalrmm_Installer_Strings : FILE
{
	meta:
		description = "Detects TacticalRMM installer"
		author = "Sekoia.io"
		id = "c4a0ba33-b458-4c2a-abfa-4c33481d6491"
		date = "2024-05-23"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/tool_tacticalrmm_installer_strings.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "0f8d66eb1c9c6ed9571a1dd7de05072aec6d3cda874618889d4fd51e5965bb26"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "TacticalRMMInstaller" ascii
		$ = "tacticalagent-" ascii
		$ = "tactical/go" ascii
		$ = "tacticalrmm." ascii

	condition:
		( uint32be( 0 ) == 0x7f454c46 or uint16be( 0 ) == 0x4d5a ) and filesize > 3MB and filesize < 8MB and 3 of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$text"TacticalRMMInstaller"ascii
$text"tacticalagent-"ascii
$text"tactical/go"ascii
$text"tacticalrmm."ascii

Condition

( uint32be( 0 ) == 0x7f454c46 or uint16be( 0 ) == 0x4d5a ) and filesize > 3MB and filesize < 8MB and 3 of them

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 8MB (a cheap guard that skips large files).
  • The file must be larger than 3MB.
  • 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: c4a0ba33-b458-4c2a-abfa-4c33481d6491

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE

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