YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_Backdoor_May26

Detects a backdoor smuggled into signed DAEMON Tools binaries via supply-chain compromise, receives encrypted commands over HTTPS to execute arbitrary shell commands and drop files on victim hosts.

MalwareSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X

Author: MalGamy
Date: 2026-05-05
Modified: 2026-05-15
Score / Quality: 80 / 85

What this rule detects

Detects a backdoor smuggled into signed DAEMON Tools binaries via supply-chain compromise, receives encrypted commands over HTTPS to execute arbitrary shell commands and drop files on victim hosts.

It defines 2 patterns (0 text, 2 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

mal-backdoor-may26.yarDetection Rule License 1.1

rule SIGNATURE_BASE_MAL_Backdoor_May26
{
	meta:
		description = "Detects a backdoor smuggled into signed DAEMON Tools binaries via supply-chain compromise, receives encrypted commands over HTTPS to execute arbitrary shell commands and drop files on victim hosts."
		author = "MalGamy"
		id = "8f2493db-3ce6-576a-b1e9-80910dfbbaa8"
		date = "2026-05-05"
		modified = "2026-05-15"
		reference = "https://securelist.com/tr/daemon-tools-backdoor/119654/"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/threat_compromised_daemon_tools_lite_may26.yar#L52-L66"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "5d581534b48d09855ac045aaf9b196ca26396a6c08616213f9f9afc656849c2f"
		logic_hash = "6173f47f8b50b409bbe63cfa512b0081f5085357df8c9ffd0db198a7d4717625"
		score = 80
		quality = 85
		tags = ""

	strings:
		$op1 = { 48 8D 8D ?? ?? ?? ?? C7 45 ?? ?? ?? ?? ?? C7 45 ?? ?? ?? ?? ?? F3 0F 7F 7D ?? C7 45 ?? ?? ?? ?? ?? F3 0F 7F 75 ?? C7 45 ?? ?? ?? ?? ?? C7 45 ?? ?? ?? ?? ?? 66 C7 45 ?? ?? ?? C6 45 ?? ?? FF 15 ?? ?? ?? ?? 48 8D 15 ?? ?? ?? ?? 48 8D 8D ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 48 8D 95 }
		$op2 = { 4D 8D 40 ?? 99 41 FF C1 41 F7 FB 48 63 C2 0F B6 8C 05 ?? ?? ?? ?? 41 30 48 ?? 49 83 EA }

	condition:
		all of them
}

Strings (2 patterns)

Identifier	Type	Value	Modifiers
$op1	hex	{ 48 8D 8D ?? ?? ?? ?? C7 45 ?? ?? ?? ?? ?? C7 45 ?? ?? ?? ?? ?? F3 0F 7F 7D ?? C7 45 ?? ?? ?? ?? ?? F3 0F 7F 75 ?? C7 45 ?? ?? ?? ?? ?? C7 45 ?? ?? ?? ?? ?? 66 …
$op2	hex	{ 4D 8D 40 ?? 99 41 FF C1 41 F7 FB 48 63 C2 0F B6 8C 05 ?? ?? ?? ?? 41 30 48 ?? 49 83 EA }

Condition

all of them

In plain words (Heuristic)

All patterns in the rule must match.

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References

https://securelist.com/tr/daemon-tools-backdoor/119654/

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

5d581534b48d09855ac045aaf9b196ca26396a6c08616213f9f9afc656849c2f

Licence & attribution

Author: MalGamy

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

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: 8f2493db-3ce6-576a-b1e9-80910dfbbaa8

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