rule Windows_Ransomware_Akira_c8c298ba
{
	meta:
		author = "Elastic Security"
		id = "c8c298ba-2760-4880-a54a-3d916049d0ab"
		fingerprint = "81c6dfa172ce7f4254e3cc74fcb71786336d39438d6e9379f7611495f54227c9"
		creation_date = "2024-05-02"
		last_modified = "2024-05-08"
		threat_name = "Windows.Ransomware.Akira"
		reference_sample = "a2df5477cf924bd41241a3326060cc2f913aff2379858b148ddec455e4da67bc"
		severity = 100
		arch_context = "x86, arm64"
		scan_context = "file, memory"
		license = "Elastic License v2"
		os = "windows"

	strings:
		$a1 = "akira_readme.txt" ascii fullword
		$a2 = "Number of threads to encrypt = " ascii fullword
		$a3 = "write_encrypt_info error:" ascii fullword
		$a4 = "Log-%d-%m-%Y-%H-%M-%S" ascii fullword
		$a5 = "--encryption_path" wide fullword
		$a6 = "--encryption_percent" wide fullword

	condition:
		3 of them
}