Common Information
Type Value
Value
rule M_Hunting_VEILEDSIGNAL_4 {
	meta:
		author = "Mandiant"
		disclaimer = "This rule is meant for hunting and is not tested to run in a production environment"
		md5 = "404b09def6054a281b41d309d809a428, c6441c961dcad0fe127514a918eaabd4"
	strings:
		$sb1 = { FF 15 FC 76 01 00 8B F0 85 C0 74 ?? 8D 50 01 [6-16] FF 15 [4] 48 8B D8 48 85 C0 74 ?? 89 ?? 24 28 44 8B CD 4C 8B C? 48 89 44 24 20 }
		$sb2 = { 33 D2 33 C9 FF 15 [4] 4C 8B CB 4C 89 74 24 28 4C 8D 05 [2] FF FF 44 89 74 24 20 33 D2 33 C9 FF 15 }
		$si1 = "CreateThread" fullword
		$si2 = "MultiByteToWideChar" fullword
		$si3 = "LocalAlloc" fullword
		$se1 = "DllGetClassObject" 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