DITEKSHEN_MALWARE_Win_Nermer

rule DITEKSHEN_MALWARE_Win_Nermer : FILE
{
	meta:
		description = "Detects Nermer ransomware"
		author = "ditekSHen"
		id = "fce4f178-8e98-53b0-ae09-2ce876ad524e"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L6036-L6062"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "e885b1b908b256ee07f5cb144d63f5ad65e5bf746b70efe168b0ac742a246ab3"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = "gPROTECT_INFO.TXT" fullword wide
		$x2 = ".nermer" fullword wide
		$s1 = "db_journal" fullword wide
		$s2 = "quicken2015backup" fullword wide
		$s3 = "mysql" fullword wide
		$s4 = "sas7bdat" fullword wide
		$s5 = "httpd.exe" fullword wide
		$s6 = "Intuit.QuickBooks.FCS" fullword wide
		$s7 = "convimage" fullword wide
		$s8 = ".?AV?$_Binder@U_Unforced@std@@P8shares_t@" ascii
		$s9 = "BgIAAACkAABSU0ExAAgAAAEAAQCt" ascii
		$m1 = "YOUR FILES WERE ENCRYPTED" ascii
		$m2 = "MARKED BY EXTENSION .nermer" ascii
		$m3 = "send us your id: >> {id} <<" ascii
		$m4 = "email us: >> {email} <<" ascii
		$c1 = "/repeater.php" ascii
		$c2 = "HTTPClient/0.1" fullword ascii
		$c3 = "94.156.35.227" ascii
		$c4 = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( all of ( $m* ) or all of ( $c* ) or all of ( $s* ) or ( 4 of ( $s* ) and ( 1 of ( $x* ) or 1 of ( $m* ) or 2 of ( $c* ) ) ) or 14 of them )
}