unpacked_qbot

YARA detection rule by Unknown · Unknown

Detects unpacked or memory-dumped QBot samples

import "pe"
rule unpacked_qbot
{
	meta:
		description = "Detects unpacked or memory-dumped QBot samples"
		date = "2022-06-21"
		yarahub_author_twitter = "@z3r0privacy"
		yarahub_reference_md5 = "159E8962C4646EB3ED7C7837F6143F47"
		yarahub_uuid = "a2ad2850-fa12-469f-947a-9dbf79ffcc51"
		yarahub_license = "CC0 1.0"
		yarahub_rule_matching_tlp = "TLP:WHITE"
		yarahub_rule_sharing_tlp = "TLP:WHITE"
		malpedia_family = "win.qakbot"

	strings:
		$f_crc = { 33 ?? 8b ?? c1 ?? 04 83 ?? 0f 33 [1-6] 8b ?? c1 ?? 04 83 ?? 0f 33 }
		$c_apihash = { 5b e9 8f 21 }

	condition:
		all of them
		and pe.is_pe and filesize < 1MB
}

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

7d2a7047-5121-408d-bbee-19247bf8fc05

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Executable code, not a declarative rule

This submission is arbitrary [[ currentRule.format ? currentRule.format.toUpperCase() : '' ]] code, not a declarative detection rule — review it as you would any script before running it, and note that it cannot be safely aggregated or auto-executed alongside YARA/Sigma/Suricata/CRS rules.

Rejected pattern present

[[ reason ]]

What does this mean?

Format & documentation suggestions

Not a security issue — this rule is valid and was accepted as-is. These are optional fields/conventions its own format recommends, mainly affecting its quality score and how well it documents itself for other reviewers.

[[ reason ]]

What do these messages mean?

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

[[ currentRule.title ]]

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