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Updated DNS alert triggered only with TTL == 0
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@lucaderi
lucaderi committed Jun 13, 2022
1 parent 831562c commit defe7d7
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Showing 36 changed files with 228 additions and 232 deletions.
8 changes: 2 additions & 6 deletions src/lib/protocols/dns.c
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Original file line number Diff line number Diff line change
Expand Up @@ -310,12 +310,8 @@ static int search_valid_dns(struct ndpi_detection_module_struct *ndpi_struct,
rsp_type = get16(&x, packet->payload);
rsp_ttl = ntohl(*((u_int32_t*)&packet->payload[x+2]));

if(rsp_ttl < 300) {
char buf[64];

snprintf(buf, sizeof(buf), "Low DNS Record TTL %d", rsp_ttl);
ndpi_set_risk(ndpi_struct, flow, NDPI_DNS_SUSPICIOUS_TRAFFIC, buf);
}
if(rsp_ttl == 0)
ndpi_set_risk(ndpi_struct, flow, NDPI_DNS_SUSPICIOUS_TRAFFIC, "DNS Record with zero TTL");

#ifdef DNS_DEBUG
printf("[DNS] TTL = %u\n", rsp_ttl);
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6 changes: 3 additions & 3 deletions tests/result/1kxun.pcap.out
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Original file line number Diff line number Diff line change
Expand Up @@ -146,15 +146,15 @@ JA3 Host Stats:
112 UDP 192.168.5.67:138 -> 192.168.255.255:138 [proto: 10.16/NetBIOS.SMBv1][ClearText][Confidence: DPI][cat: System/18][2 pkts/549 bytes -> 0 pkts/0 bytes][Goodput ratio: 85/0][< 1 sec][Hostname/SNI: sanji-lifebook-][Risk: ** Unsafe Protocol **][Risk Score: 10][PLAIN TEXT ( FDEBEOEKEJ)][Plen Bins: 0,0,0,0,0,0,50,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
113 UDP [fe80::406:55a8:6453:25dd]:546 -> [ff02::1:2]:547 [proto: 103/DHCPV6][ClearText][Confidence: DPI][cat: Network/14][5 pkts/490 bytes -> 0 pkts/0 bytes][Goodput ratio: 37/0][15.56 sec][Plen Bins: 0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
114 UDP [fe80::beee:7bff:fe0c:b3de]:546 -> [ff02::1:2]:547 [proto: 103/DHCPV6][ClearText][Confidence: DPI][cat: Network/14][4 pkts/392 bytes -> 0 pkts/0 bytes][Goodput ratio: 37/0][14.54 sec][Plen Bins: 0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
115 UDP 192.168.5.16:63372 <-> 168.95.1.1:53 [proto: 5/DNS][ClearText][Confidence: DPI][cat: Network/14][1 pkts/89 bytes <-> 1 pkts/289 bytes][Goodput ratio: 52/85][0.01 sec][Hostname/SNI: dl-obs.official.line.naver.jp][203.69.81.73][Risk: ** Suspicious DNS Traffic **][Risk Score: 100][Risk Info: Low DNS Record TTL 176][PLAIN TEXT (official)][Plen Bins: 0,50,0,0,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
115 UDP 192.168.5.16:63372 <-> 168.95.1.1:53 [proto: 5/DNS][ClearText][Confidence: DPI][cat: Network/14][1 pkts/89 bytes <-> 1 pkts/289 bytes][Goodput ratio: 52/85][0.01 sec][Hostname/SNI: dl-obs.official.line.naver.jp][203.69.81.73][PLAIN TEXT (official)][Plen Bins: 0,50,0,0,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
116 TCP 192.168.115.8:49596 <-> 203.66.182.87:443 [proto: 91/TLS][Encrypted][Confidence: Match by port][cat: Web/5][4 pkts/220 bytes <-> 2 pkts/132 bytes][Goodput ratio: 2/0][45.01 sec][bytes ratio: 0.250 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/45002 14999/45002 44996/45002 21211/0][Pkt Len c2s/s2c min/avg/max/stddev: 55/66 55/66 55/66 0/0][Plen Bins: 100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
117 UDP 192.168.5.9:68 -> 255.255.255.255:67 [proto: 18/DHCP][ClearText][Confidence: DPI][cat: Network/14][1 pkts/342 bytes -> 0 pkts/0 bytes][Goodput ratio: 87/0][< 1 sec][Hostname/SNI: joanna-pc][DHCP Fingerprint: 1,15,3,6,44,46,47,31,33,121,249,43,252][DHCP Class Ident: MSFT 5.0][PLAIN TEXT (Joanna)][Plen Bins: 0,0,0,0,0,0,0,0,0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
118 UDP 192.168.5.41:68 -> 255.255.255.255:67 [proto: 18/DHCP][ClearText][Confidence: DPI][cat: Network/14][1 pkts/342 bytes -> 0 pkts/0 bytes][Goodput ratio: 87/0][< 1 sec][Hostname/SNI: kevin-pc][DHCP Fingerprint: 1,15,3,6,44,46,47,31,33,121,249,43,252][DHCP Class Ident: MSFT 5.0][PLAIN TEXT (MSFT 5.07)][Plen Bins: 0,0,0,0,0,0,0,0,0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
119 TCP 192.168.2.126:35666 -> 18.66.2.90:80 [proto: 291.265/MpegDash.AmazonAWS][ClearText][Confidence: DPI][cat: Cloud/13][1 pkts/299 bytes -> 0 pkts/0 bytes][Goodput ratio: 78/0][< 1 sec][Hostname/SNI: cdn.liftoff.io][User-Agent: Dalvik/2.1.0 (Linux; U; Android 11; sdk_gphone_x86 Build/RSR1.201013.001)][PLAIN TEXT (GET /customers/45)][Plen Bins: 0,0,0,0,0,0,0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
120 UDP 192.168.115.8:60724 <-> 8.8.8.8:53 [proto: 5.295/DNS.1kxun][ClearText][Confidence: DPI][cat: Streaming/17][2 pkts/146 bytes <-> 1 pkts/137 bytes][Goodput ratio: 42/69][0.05 sec][Hostname/SNI: pic.1kxun.com][106.187.35.246][Plen Bins: 66,0,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
121 UDP 192.168.0.104:137 -> 192.168.255.255:137 [proto: 10/NetBIOS][ClearText][Confidence: DPI][cat: System/18][3 pkts/276 bytes -> 0 pkts/0 bytes][Goodput ratio: 54/0][1.54 sec][Hostname/SNI: sc.arrancar.org][PLAIN TEXT ( FDEDCOEBFC)][Plen Bins: 0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
122 UDP 192.168.115.8:51024 <-> 8.8.8.8:53 [proto: 5.295/DNS.1kxun][ClearText][Confidence: DPI][cat: Streaming/17][2 pkts/160 bytes <-> 1 pkts/112 bytes][Goodput ratio: 47/62][0.02 sec][Hostname/SNI: jp.kankan.1kxun.mobi][106.185.35.110][Risk: ** Suspicious DNS Traffic **][Risk Score: 100][Risk Info: Low DNS Record TTL 299][PLAIN TEXT (kankan)][Plen Bins: 0,66,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
123 UDP 192.168.115.8:54420 <-> 8.8.8.8:53 [proto: 5.48/DNS.QQ][ClearText][Confidence: DPI][cat: Chat/9][2 pkts/150 bytes <-> 1 pkts/116 bytes][Goodput ratio: 44/63][0.04 sec][Hostname/SNI: vv.video.qq.com][203.205.151.234][Risk: ** Suspicious DNS Traffic **][Risk Score: 100][Risk Info: Low DNS Record TTL 299][Plen Bins: 0,66,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
122 UDP 192.168.115.8:51024 <-> 8.8.8.8:53 [proto: 5.295/DNS.1kxun][ClearText][Confidence: DPI][cat: Streaming/17][2 pkts/160 bytes <-> 1 pkts/112 bytes][Goodput ratio: 47/62][0.02 sec][Hostname/SNI: jp.kankan.1kxun.mobi][106.185.35.110][PLAIN TEXT (kankan)][Plen Bins: 0,66,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
123 UDP 192.168.115.8:54420 <-> 8.8.8.8:53 [proto: 5.48/DNS.QQ][ClearText][Confidence: DPI][cat: Chat/9][2 pkts/150 bytes <-> 1 pkts/116 bytes][Goodput ratio: 44/63][0.04 sec][Hostname/SNI: vv.video.qq.com][203.205.151.234][Plen Bins: 0,66,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
124 UDP 192.168.115.8:52723 <-> 8.8.8.8:53 [proto: 5.295/DNS.1kxun][ClearText][Confidence: DPI][cat: Streaming/17][2 pkts/152 bytes <-> 1 pkts/108 bytes][Goodput ratio: 44/61][1.05 sec][Hostname/SNI: kankan.1kxun.com][222.73.254.113][PLAIN TEXT (kankan)][Plen Bins: 0,66,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
125 UDP 192.168.115.8:52723 <-> 168.95.1.1:53 [proto: 5.295/DNS.1kxun][ClearText][Confidence: DPI][cat: Streaming/17][2 pkts/152 bytes <-> 1 pkts/108 bytes][Goodput ratio: 44/61][0.00 sec][Hostname/SNI: kankan.1kxun.com][222.73.254.167][PLAIN TEXT (kankan)][Plen Bins: 0,66,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
126 UDP 192.168.115.8:51458 -> 224.0.0.252:5355 [proto: 154/LLMNR][ClearText][Confidence: DPI][cat: Network/14][4 pkts/256 bytes -> 0 pkts/0 bytes][Goodput ratio: 34/0][0.10 sec][Hostname/SNI: wpad][Plen Bins: 100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
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4 changes: 2 additions & 2 deletions tests/result/6in4tunnel.pcap.out
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Expand Up @@ -21,8 +21,8 @@ JA3 Host Stats:
3 ICMPV6 [2001:470:1f17:13f:3e97:eff:fe73:4dec]:0 <-> [2604:a880:1:20::224:b001]:0 [proto: 102/ICMPV6][ClearText][Confidence: DPI][cat: Network/14][23 pkts/3174 bytes <-> 23 pkts/3174 bytes][Goodput ratio: 41/41][22.14 sec][bytes ratio: 0.000 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 1000/992 1001/1001 1001/1012 0/4][Pkt Len c2s/s2c min/avg/max/stddev: 138/138 138/138 138/138 0/0][Plen Bins: 0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
4 TCP [2001:470:1f17:13f:3e97:eff:fe73:4dec]:41538 <-> [2604:a880:1:20::224:b001]:80 [proto: 7/HTTP][ClearText][Confidence: DPI][cat: Web/5][6 pkts/786 bytes <-> 4 pkts/1006 bytes][Goodput ratio: 18/57][0.82 sec][Hostname/SNI: mail.tomasu.net][bytes ratio: -0.123 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/2 164/56 495/110 171/54][Pkt Len c2s/s2c min/avg/max/stddev: 106/106 131/252 248/680 52/247][URL: mail.tomasu.net/][StatusCode: 301][Content-Type: text/html][User-Agent: Wget/1.16.3 (linux-gnu)][PLAIN TEXT (GET / HTTP/1.1)][Plen Bins: 0,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
5 ICMPV6 [2a03:2880:1010:6f03:face:b00c::2]:0 -> [2001:470:1f17:13f:3e97:eff:fe73:4dec]:0 [proto: 102/ICMPV6][ClearText][Confidence: DPI][cat: Network/14][1 pkts/1314 bytes -> 0 pkts/0 bytes][Goodput ratio: 94/0][< 1 sec][PLAIN TEXT (ds 0/u6)][Plen Bins: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,100,0,0,0,0,0,0,0,0,0]
6 UDP [2001:470:1f16:13f::2]:53959 <-> [2a03:2880:fffe:b:face:b00c::99]:53 [proto: 5.119/DNS.Facebook][ClearText][Confidence: DPI][cat: SocialNetwork/6][1 pkts/133 bytes <-> 1 pkts/273 bytes][Goodput ratio: 38/70][0.09 sec][Hostname/SNI: star.c10r.facebook.com][2a03:2880:1010:6f03:face:b00c::2][Risk: ** Suspicious DNS Traffic **][Risk Score: 100][Risk Info: Low DNS Record TTL 60][PLAIN TEXT (facebook)][Plen Bins: 0,50,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
7 UDP [2001:470:1f16:13f::2]:6404 <-> [2a03:2880:fffe:b:face:b00c::99]:53 [proto: 5.119/DNS.Facebook][ClearText][Confidence: DPI][cat: SocialNetwork/6][1 pkts/133 bytes <-> 1 pkts/261 bytes][Goodput ratio: 38/68][0.09 sec][Hostname/SNI: star.c10r.facebook.com][173.252.120.6][Risk: ** Suspicious DNS Traffic **][Risk Score: 100][Risk Info: Low DNS Record TTL 60][PLAIN TEXT (facebook)][Plen Bins: 0,50,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
6 UDP [2001:470:1f16:13f::2]:53959 <-> [2a03:2880:fffe:b:face:b00c::99]:53 [proto: 5.119/DNS.Facebook][ClearText][Confidence: DPI][cat: SocialNetwork/6][1 pkts/133 bytes <-> 1 pkts/273 bytes][Goodput ratio: 38/70][0.09 sec][Hostname/SNI: star.c10r.facebook.com][2a03:2880:1010:6f03:face:b00c::2][PLAIN TEXT (facebook)][Plen Bins: 0,50,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
7 UDP [2001:470:1f16:13f::2]:6404 <-> [2a03:2880:fffe:b:face:b00c::99]:53 [proto: 5.119/DNS.Facebook][ClearText][Confidence: DPI][cat: SocialNetwork/6][1 pkts/133 bytes <-> 1 pkts/261 bytes][Goodput ratio: 38/68][0.09 sec][Hostname/SNI: star.c10r.facebook.com][173.252.120.6][PLAIN TEXT (facebook)][Plen Bins: 0,50,0,0,0,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
8 TCP [2604:a880:1:20::224:b001]:993 <-> [2001:470:1f17:13f:6d69:c72:7313:616f]:35610 [proto: 51/IMAPS][Encrypted][Confidence: DPI][cat: Email/3][1 pkts/152 bytes <-> 1 pkts/106 bytes][Goodput ratio: 30/0][0.01 sec][Plen Bins: 0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
9 TCP [2604:a880:1:20::224:b001]:993 <-> [2001:470:1f17:13f:6d69:c72:7313:616f]:56381 [proto: 51/IMAPS][Encrypted][Confidence: DPI][cat: Email/3][1 pkts/152 bytes <-> 1 pkts/106 bytes][Goodput ratio: 30/0][0.07 sec][Plen Bins: 0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
10 ICMPV6 [2001:470:1f16:13f::2]:0 -> [2604:a880:1:20::224:b001]:0 [proto: 102/ICMPV6][ClearText][Confidence: DPI][cat: Network/14][1 pkts/200 bytes -> 0 pkts/0 bytes][Goodput ratio: 59/0][< 1 sec][Plen Bins: 0,0,0,100,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
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