Mystic_Compressor

YARA detection rule by _pusher_ · GPL-2.0

Rule Mystic_Compressor (No description metadata provided).

import "pe"
rule Mystic_Compressor : UnKnownVer
{
		meta:
		author="_pusher_"
		date = "2015-12"
	strings:
		$a0 = { 43 6D 44 49 41 4C 33 32 00 00 00 00 }
		$a1 = { 44 65 6C 70 68 69 41 70 70 6C 69 63 61 74 69 6F 6E }
	condition:
		pe.imports ("kernel32.dll","VirtualAlloc") and
		pe.imports ("kernel32.dll","GetStartupInfoA") and
		pe.imports ("kernel32.dll","OutputDebugStringA") and
		pe.imports ("kernel32.dll","LoadLibraryA") and
		($a0 in (pe.sections[1].raw_data_offset..pe.sections[2].raw_data_offset+pe.sections[2].raw_data_size)) and 
		$a1
}

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

3744df2d-3c55-405b-b18d-5e4736058849

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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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