Common Information
Type Value
Value
rule M_Hunting_VEILEDSIGNAL_2 {
	meta:
		author = "Mandiant"
		disclaimer = "This rule is meant for hunting and is not tested to run in a production environment"
		md5 = "404b09def6054a281b41d309d809a428"
	strings:
		$sb1 = { C1 E0 05 4D 8? [2] 33 D0 45 69 C0 7D 50 BF 12 8B C2 41 FF C2 C1 E8 07 33 D0 8B C2 C1 E0 16 41 81 C0 87 D6 12 00 }
		$si1 = "CryptBinaryToStringA" fullword
		$si2 = "BCryptGenerateSymmetricKey" fullword
		$si3 = "CreateThread" fullword
		$ss1 = "ChainingModeGCM" wide
		$ss2 = "__tutma" fullword
	condition:
		(uint16(0) == 0x5A4D) and (uint32(uint32(0x3C)) == 0x00004550) and (uint16(uint32(0x3C) + 0x18) == 0x020B) and all of them
}
Category
Type Yara Rule
Misp Type
Description
Details Published Attributes CTI Title
Details Website 2023-04-20 72 3CX Software Supply Chain Compromise Initiated by a Prior Software Supply Chain Compromise; Suspected North Korean Actor Responsible | Mandiant