VOLEXITY_Webshell_Jsp_Converge

rule VOLEXITY_Webshell_Jsp_Converge : FILE MEMORY CVE_2022_26134
{
	meta:
		description = "Detects CONVERGE - a file upload webshell observed in incident involving compromise of Confluence server via CVE-2022-26134."
		author = "threatintel@volexity.com"
		id = "2a74678e-cb00-567c-a2e0-2e095f3e5ee8"
		date = "2022-06-01"
		modified = "2024-09-20"
		reference = "https://github.com/volexity/threat-intel"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2022/2022-06-02 Active Exploitation Of Confluence 0-day/indicators/yara.yar#L1-L21"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		logic_hash = "bb48516342eddd48c35e6db0eb74f95e116dc723503552b99ba721b5bdb391e5"
		score = 75
		quality = 80
		tags = "FILE, MEMORY, CVE-2022-26134"
		os = "all"
		os_arch = "all"
		scan_context = "file,memory"
		severity = "critical"
		license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
		rule_id = 6788
		version = 5

	strings:
		$s1 = "if (request.getParameter(\"name\")!=null && request.getParameter(\"name\").length()!=0){" ascii

	condition:
		$s1
}