diff --git a/attribute.go b/attribute.go
index 1e11cf9..0d7e30c 100644
--- a/attribute.go
+++ b/attribute.go
@@ -22,7 +22,7 @@ func extractAttribute(a *Attribute, logger Logger, data []byte) error {
 		case nfUlaAttrPacketHdr:
 			hwProtocol := binary.BigEndian.Uint16(ad.Bytes()[:2])
 			a.HwProtocol = &hwProtocol
-			hook := uint8(ad.Bytes()[3])
+			hook := uint8(ad.Bytes()[2])
 			a.Hook = &hook
 		case nfUlaAttrMark:
 			ad.ByteOrder = binary.BigEndian
diff --git a/attribute_test.go b/attribute_test.go
index 306e898..f7bb38b 100644
--- a/attribute_test.go
+++ b/attribute_test.go
@@ -44,14 +44,14 @@ func TestExtractAttributes(t *testing.T) {
 		"SimplePing": {
 			data: []byte{0x02, 0x00, 0x00, 0x64, 0x08, 0x00, 0x01, 0x00, 0x08, 0x00, 0x03, 0x00, 0x05, 0x00, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x03, 0x08, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x03, 0xe8, 0x08, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x03, 0xe8, 0x58, 0x00, 0x09, 0x00, 0x45, 0x00, 0x00, 0x54, 0x3d, 0x98, 0x40, 0x00, 0x40, 0x01, 0xf0, 0x52, 0x0a, 0x00, 0x00, 0xbd, 0x01, 0x01, 0x01, 0x01, 0x08, 0x00, 0xfe, 0x4b, 0x46, 0xd2, 0x00, 0x02, 0x4e, 0x01, 0x85, 0x5b, 0x00, 0x00, 0x00, 0x00, 0x1a, 0xb0, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37},
 			a: Attribute{
-				Hook: pUint8(0), Prefix: pString(""), HwProtocol: pUint16(unix.ETH_P_IP), UID: pUint32(0x03e8), GID: pUint32(0x03e8), OutDev: pUint32(0x03),
+				Hook: pUint8(3), Prefix: pString(""), HwProtocol: pUint16(unix.ETH_P_IP), UID: pUint32(0x03e8), GID: pUint32(0x03e8), OutDev: pUint32(0x03),
 				Payload: pBytes([]byte{0x45, 0x00, 0x00, 0x54, 0x3d, 0x98, 0x40, 0x00, 0x40, 0x01, 0xf0, 0x52, 0x0a, 0x00, 0x00, 0xbd, 0x01, 0x01, 0x01, 0x01, 0x08, 0x00, 0xfe, 0x4b, 0x46, 0xd2, 0x00, 0x02, 0x4e, 0x01, 0x85, 0x5b, 0x00, 0x00, 0x00, 0x00, 0x1a, 0xb0, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37}),
 			},
 		},
 		"IPv6 TCP packet with conntrack data": {
 			data: []byte{0x0a, 0x00, 0x00, 0x7b, 0x08, 0x00, 0x01, 0x00, 0x86, 0xdd, 0x01, 0x00, 0x11, 0x00, 0x0a, 0x00, 0x74, 0x65, 0x73, 0x74, 0x70, 0x72, 0x65, 0x66, 0x69, 0x78, 0x3a, 0x20, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x02, 0x10, 0x00, 0x08, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x1b, 0x21, 0x9f, 0x57, 0x31, 0x00, 0x00, 0x06, 0x00, 0x0f, 0x00, 0x00, 0x01, 0x00, 0x00, 0x06, 0x00, 0x11, 0x00, 0x00, 0x0e, 0x00, 0x00, 0x12, 0x00, 0x10, 0x00, 0xce, 0x7e, 0x7c, 0x41, 0x0f, 0xdb, 0x00, 0x1b, 0x21, 0x9f, 0x57, 0x31, 0x86, 0xdd, 0x00, 0x00, 0x14, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5f, 0x9d, 0x2f, 0x3a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x64, 0x04, 0x08, 0x00, 0x0b, 0x00, 0x00, 0x00, 0x00, 0x21, 0x08, 0x00, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x21, 0xe4, 0x00, 0x12, 0x80, 0x4c, 0x00, 0x01, 0x80, 0x2c, 0x00, 0x01, 0x80, 0x14, 0x00, 0x03, 0x00, 0x20, 0x01, 0x04, 0x70, 0xb7, 0x50, 0x00, 0x01, 0xf5, 0x18, 0x96, 0xf6, 0xe8, 0xae, 0x07, 0x2d, 0x14, 0x00, 0x04, 0x00, 0x2a, 0x07, 0x57, 0x41, 0x00, 0x00, 0x11, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x1c, 0x00, 0x02, 0x80, 0x05, 0x00, 0x01, 0x00, 0x06, 0x00, 0x00, 0x00, 0x06, 0x00, 0x02, 0x00, 0xfe, 0x0f, 0x00, 0x00, 0x06, 0x00, 0x03, 0x00, 0x01, 0xbb, 0x00, 0x00, 0x4c, 0x00, 0x02, 0x80, 0x2c, 0x00, 0x01, 0x80, 0x14, 0x00, 0x03, 0x00, 0x2a, 0x07, 0x57, 0x41, 0x00, 0x00, 0x11, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x14, 0x00, 0x04, 0x00, 0x20, 0x01, 0x04, 0x70, 0xb7, 0x50, 0x00, 0x01, 0xf5, 0x18, 0x96, 0xf6, 0xe8, 0xae, 0x07, 0x2d, 0x1c, 0x00, 0x02, 0x80, 0x05, 0x00, 0x01, 0x00, 0x06, 0x00, 0x00, 0x00, 0x06, 0x00, 0x02, 0x00, 0x01, 0xbb, 0x00, 0x00, 0x06, 0x00, 0x03, 0x00, 0xfe, 0x0f, 0x00, 0x00, 0x08, 0x00, 0x0c, 0x00, 0x18, 0x9d, 0x23, 0xd6, 0x08, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x08, 0x00, 0x07, 0x00, 0x00, 0x00, 0x01, 0x2c, 0x30, 0x00, 0x04, 0x80, 0x2c, 0x00, 0x01, 0x80, 0x05, 0x00, 0x01, 0x00, 0x03, 0x00, 0x00, 0x00, 0x05, 0x00, 0x02, 0x00, 0x06, 0x00, 0x00, 0x00, 0x05, 0x00, 0x03, 0x00, 0x07, 0x00, 0x00, 0x00, 0x06, 0x00, 0x04, 0x00, 0x23, 0x00, 0x00, 0x00, 0x06, 0x00, 0x05, 0x00, 0x33, 0x00, 0x00, 0x00, 0x08, 0x00, 0x13, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4c, 0x00, 0x09, 0x00, 0x60, 0x0e, 0xb3, 0xfe, 0x00, 0x20, 0x06, 0x37, 0x20, 0x01, 0x04, 0x70, 0xb7, 0x50, 0x00, 0x01, 0xf5, 0x18, 0x96, 0xf6, 0xe8, 0xae, 0x07, 0x2d, 0x2a, 0x07, 0x57, 0x41, 0x00, 0x00, 0x11, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xfe, 0x0f, 0x01, 0xbb, 0x74, 0xde, 0x6b, 0xcb, 0x4a, 0xf3, 0x26, 0xdc, 0x80, 0x10, 0x07, 0xdc, 0x0b, 0xfa, 0x00, 0x00, 0x01, 0x01, 0x08, 0x0a, 0x4d, 0xcd, 0xeb, 0x52, 0x87, 0x98, 0x65, 0x7b},
 			a: Attribute{
-				Hook: pUint8(0), Prefix: pString("testprefix: "), HwProtocol: pUint16(unix.ETH_P_IPV6), UID: pUint32(33), GID: pUint32(33), InDev: pUint32(0x02),
+				Hook: pUint8(1), Prefix: pString("testprefix: "), HwProtocol: pUint16(unix.ETH_P_IPV6), UID: pUint32(33), GID: pUint32(33), InDev: pUint32(0x02),
 				Timestamp: pTime(1604136762, 156676000), HwType: pUint16(1), HwLen: pUint16(14),
 				HwAddr:   pBytes([]byte{0x00, 0x1b, 0x21, 0x9f, 0x57, 0x31}),
 				HwHeader: pBytes([]byte{0xce, 0x7e, 0x7c, 0x41, 0x0f, 0xdb, 0x00, 0x1b, 0x21, 0x9f, 0x57, 0x31, 0x86, 0xdd}),