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Calculate packet entropy for unknown protocols. (ntop#2369)
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Signed-off-by: Toni Uhlig <[email protected]>
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@utoni
utoni authored Apr 6, 2024
1 parent b535033 commit 727e72d
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Showing 34 changed files with 91 additions and 70 deletions.
23 changes: 22 additions & 1 deletion src/lib/ndpi_main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -8584,7 +8584,7 @@ static ndpi_protocol ndpi_internal_detection_process_packet(struct ndpi_detectio
/* Zoom cache */
if((ret.app_protocol == NDPI_PROTOCOL_ZOOM) && (flow->l4_proto == IPPROTO_TCP))
ndpi_add_connection_as_zoom(ndpi_str, flow);

if(ndpi_str->cfg.fully_encrypted_heuristic &&
ret.app_protocol == NDPI_PROTOCOL_UNKNOWN && /* Only for unknown traffic */
flow->packet_counter == 1 && packet->payload_packet_len > 0) {
Expand All @@ -8595,6 +8595,27 @@ static ndpi_protocol ndpi_internal_detection_process_packet(struct ndpi_detectio
ndpi_search_portable_executable(ndpi_str, flow);
}

if(flow->first_pkt_fully_encrypted == 0 &&
ret.app_protocol == NDPI_PROTOCOL_UNKNOWN &&
NDPI_ENTROPY_ENCRYPTED_OR_RANDOM(flow->entropy) == 0 &&
flow->packet_counter < 3)
{
flow->entropy = ndpi_entropy(packet->payload, packet->payload_packet_len);
if(NDPI_ENTROPY_ENCRYPTED_OR_RANDOM(flow->entropy) != 0) {
char str[32];

snprintf(str, sizeof(str), "Entropy %.2f", flow->entropy);
ndpi_set_risk(flow, NDPI_SUSPICIOUS_ENTROPY, str);
}
}
if(ret.app_protocol != NDPI_PROTOCOL_UNKNOWN &&
ret.app_protocol != NDPI_PROTOCOL_IP_ICMP &&
flow->entropy > 0.0f)
{
flow->entropy = 0.0f;
ndpi_unset_risk(flow, NDPI_SUSPICIOUS_ENTROPY);
}

return(ret);
}

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4 changes: 2 additions & 2 deletions tests/cfgs/caches_cfg/result/teams.pcap.out
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ Automa domain: 85/0 (search/found)
Automa tls cert: 0/0 (search/found)
Automa risk mask: 24/1 (search/found)
Automa common alpns: 67/67 (search/found)
Patricia risk mask: 80/0 (search/found)
Patricia risk mask: 82/0 (search/found)
Patricia risk mask IPv6: 0/0 (search/found)
Patricia risk: 1/0 (search/found)
Patricia risk IPv6: 0/0 (search/found)
Expand Down Expand Up @@ -68,7 +68,7 @@ JA3 Host Stats:
11 TCP 192.168.1.6:60540 <-> 52.114.75.70:443 [proto: 91.250/TLS.Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 5][cat: Collaborative/15][14 pkts/5711 bytes <-> 10 pkts/8093 bytes][Goodput ratio: 83/92][0.13 sec][Hostname/SNI: eu-prod.asyncgw.teams.microsoft.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.173 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 8/9 32/32 13/14][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 408/809 1494/1506 517/688][TLSv1.2][JA3C: 74d5fa154a7fc0a7c655d8eaa34b89bf][JA4: t12d1312h2_8b80da21ef18_b00751acaffa][Plen Bins: 0,7,0,7,0,0,0,15,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,15,31,0,0]
12 TCP 192.168.1.6:60537 <-> 52.114.77.33:443 [proto: 91.212/TLS.Microsoft][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 8][cat: Cloud/13][16 pkts/8418 bytes <-> 10 pkts/5367 bytes][Goodput ratio: 87/88][0.27 sec][Hostname/SNI: mobile.pipe.aria.microsoft.com][bytes ratio: 0.221 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/0 14/27 46/46 20/20][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 526/537 1494/1506 639/623][Risk: ** TLS (probably) Not Carrying HTTPS **][Risk Score: 10][Risk Info: No ALPN][TLSv1.2][JA3C: a1674500365bdd882188db63730e69a2][JA4: t12d150700_0707305c9f76_0f3b2bcde21d][ServerNames: *.events.data.microsoft.com,events.data.microsoft.com,*.pipe.aria.microsoft.com,pipe.skype.com,*.pipe.skype.com,*.mobile.events.data.microsoft.com,mobile.events.data.microsoft.com,*.events.data.msn.com,events.data.msn.com][JA3S: ae4edc6faf64d08308082ad26be60767][Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 4][Subject: CN=*.events.data.microsoft.com][Certificate SHA-1: 33:B3:B7:E9:DA:25:F5:A0:04:E9:63:87:B6:FB:54:77:DB:ED:27:EB][Safari][Validity: 2019-10-10 21:55:38 - 2021-10-10 21:55:38][Cipher: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 7,7,7,0,0,0,7,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,0,0,31,15,0,0]
13 TCP 192.168.1.6:60555 <-> 52.114.77.33:443 [proto: 91.212/TLS.Microsoft][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 11][cat: Cloud/13][18 pkts/5861 bytes <-> 13 pkts/7901 bytes][Goodput ratio: 80/89][2.79 sec][Hostname/SNI: mobile.pipe.aria.microsoft.com][bytes ratio: -0.148 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 192/269 2443/2490 625/741][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 326/608 1494/1506 448/617][Risk: ** TLS (probably) Not Carrying HTTPS **][Risk Score: 10][Risk Info: No ALPN][TLSv1.2][JA3C: e4d448cdfe06dc1243c1eb026c74ac9a][JA4: t12d220700_0d4ca5d4ec72_3304d8368043][ServerNames: *.events.data.microsoft.com,events.data.microsoft.com,*.pipe.aria.microsoft.com,pipe.skype.com,*.pipe.skype.com,*.mobile.events.data.microsoft.com,mobile.events.data.microsoft.com,*.events.data.msn.com,events.data.msn.com][JA3S: 986571066668055ae9481cb84fda634a][Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 4][Subject: CN=*.events.data.microsoft.com][Certificate SHA-1: 33:B3:B7:E9:DA:25:F5:A0:04:E9:63:87:B6:FB:54:77:DB:ED:27:EB][Firefox][Validity: 2019-10-10 21:55:38 - 2021-10-10 21:55:38][Cipher: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,16,11,0,0,5,0,0,0,5,5,0,0,11,0,5,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,22,0,0]
14 UDP 192.168.1.6:51681 <-> 52.114.77.136:3478 [proto: 125/Skype_Teams][IP: 276/Azure][Encrypted][Confidence: Match by port][DPI packets: 12][cat: VoIP/10][14 pkts/5838 bytes <-> 17 pkts/7907 bytes][Goodput ratio: 90/91][4.57 sec][bytes ratio: -0.151 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 347/256 2336/2336 693/595][Pkt Len c2s/s2c min/avg/max/stddev: 79/79 417/465 1243/1227 434/401][PLAIN TEXT (TBHSWF)][Plen Bins: 0,36,0,0,0,12,6,0,3,6,0,0,0,3,0,0,0,0,0,0,0,0,0,6,6,0,0,0,0,0,3,0,3,3,0,0,0,9,0,0,0,0,0,0,0,0,0,0]
14 UDP 192.168.1.6:51681 <-> 52.114.77.136:3478 [proto: 125/Skype_Teams][IP: 276/Azure][Encrypted][Confidence: Match by port][DPI packets: 12][cat: VoIP/10][14 pkts/5838 bytes <-> 17 pkts/7907 bytes][Goodput ratio: 90/91][4.57 sec][bytes ratio: -0.151 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 347/256 2336/2336 693/595][Pkt Len c2s/s2c min/avg/max/stddev: 79/79 417/465 1243/1227 434/401][Risk: ** Susp Entropy **][Risk Score: 50][Risk Info: Entropy 7.83][PLAIN TEXT (TBHSWF)][Plen Bins: 0,36,0,0,0,12,6,0,3,6,0,0,0,3,0,0,0,0,0,0,0,0,0,6,6,0,0,0,0,0,3,0,3,3,0,0,0,9,0,0,0,0,0,0,0,0,0,0]
15 TCP 192.168.1.6:60547 <-> 52.114.88.59:443 [proto: 91.250/TLS.Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 14][cat: Collaborative/15][20 pkts/3926 bytes <-> 15 pkts/8828 bytes][Goodput ratio: 66/89][0.32 sec][Hostname/SNI: chatsvcagg.teams.microsoft.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.384 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 13/25 91/80 23/31][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 196/589 1494/1506 320/612][TLSv1.2][JA3C: ebf5e0e525258d7a8dcb54aa1564ecbd][JA4: t12d1311h2_8b80da21ef18_77989cba1f4a][Plen Bins: 0,21,10,5,0,5,10,5,0,0,0,5,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,5,21,0,0]
16 TCP 192.168.1.6:60565 <-> 52.114.108.8:443 [proto: 91.250/TLS.Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 5][cat: Collaborative/15][19 pkts/3306 bytes <-> 14 pkts/9053 bytes][Goodput ratio: 61/90][0.43 sec][Hostname/SNI: emea.ng.msg.teams.microsoft.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.465 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 27/12 276/54 68/17][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 174/647 1060/1506 238/633][TLSv1.2][JA3C: ebf5e0e525258d7a8dcb54aa1564ecbd][JA4: t12d1311h2_8b80da21ef18_77989cba1f4a][Plen Bins: 0,22,16,5,0,0,5,0,0,0,0,0,0,5,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,5,0,0,0,0,22,0,0]
17 TCP 192.168.1.6:60541 <-> 52.114.75.69:443 [proto: 91.125/TLS.Skype_Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 10][cat: VoIP/10][13 pkts/4051 bytes <-> 9 pkts/7973 bytes][Goodput ratio: 79/92][0.14 sec][Hostname/SNI: eu-api.asm.skype.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.326 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 10/11 31/36 14/16][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 312/886 1494/1506 422/676][TLSv1.2][JA3C: 74d5fa154a7fc0a7c655d8eaa34b89bf][JA4: t12d1312h2_8b80da21ef18_b00751acaffa][ServerNames: *.asm.skype.com][JA3S: 986571066668055ae9481cb84fda634a][Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 1][Subject: CN=*.asm.skype.com][Certificate SHA-1: B9:41:1D:AE:56:09:68:D2:07:D0:69:E1:68:00:08:2B:EF:63:1E:48][Validity: 2019-05-07 12:50:03 - 2021-05-07 12:50:03][Cipher: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,8,0,8,0,0,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,8,34,0,0]
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4 changes: 2 additions & 2 deletions tests/cfgs/caches_global/result/teams.pcap.out
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ Automa domain: 85/0 (search/found)
Automa tls cert: 0/0 (search/found)
Automa risk mask: 24/1 (search/found)
Automa common alpns: 67/67 (search/found)
Patricia risk mask: 80/0 (search/found)
Patricia risk mask: 82/0 (search/found)
Patricia risk mask IPv6: 0/0 (search/found)
Patricia risk: 1/0 (search/found)
Patricia risk IPv6: 0/0 (search/found)
Expand Down Expand Up @@ -68,7 +68,7 @@ JA3 Host Stats:
11 TCP 192.168.1.6:60540 <-> 52.114.75.70:443 [proto: 91.250/TLS.Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 5][cat: Collaborative/15][14 pkts/5711 bytes <-> 10 pkts/8093 bytes][Goodput ratio: 83/92][0.13 sec][Hostname/SNI: eu-prod.asyncgw.teams.microsoft.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.173 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 8/9 32/32 13/14][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 408/809 1494/1506 517/688][TLSv1.2][JA3C: 74d5fa154a7fc0a7c655d8eaa34b89bf][JA4: t12d1312h2_8b80da21ef18_b00751acaffa][Plen Bins: 0,7,0,7,0,0,0,15,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,15,31,0,0]
12 TCP 192.168.1.6:60537 <-> 52.114.77.33:443 [proto: 91.212/TLS.Microsoft][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 8][cat: Cloud/13][16 pkts/8418 bytes <-> 10 pkts/5367 bytes][Goodput ratio: 87/88][0.27 sec][Hostname/SNI: mobile.pipe.aria.microsoft.com][bytes ratio: 0.221 (Upload)][IAT c2s/s2c min/avg/max/stddev: 0/0 14/27 46/46 20/20][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 526/537 1494/1506 639/623][Risk: ** TLS (probably) Not Carrying HTTPS **][Risk Score: 10][Risk Info: No ALPN][TLSv1.2][JA3C: a1674500365bdd882188db63730e69a2][JA4: t12d150700_0707305c9f76_0f3b2bcde21d][ServerNames: *.events.data.microsoft.com,events.data.microsoft.com,*.pipe.aria.microsoft.com,pipe.skype.com,*.pipe.skype.com,*.mobile.events.data.microsoft.com,mobile.events.data.microsoft.com,*.events.data.msn.com,events.data.msn.com][JA3S: ae4edc6faf64d08308082ad26be60767][Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 4][Subject: CN=*.events.data.microsoft.com][Certificate SHA-1: 33:B3:B7:E9:DA:25:F5:A0:04:E9:63:87:B6:FB:54:77:DB:ED:27:EB][Safari][Validity: 2019-10-10 21:55:38 - 2021-10-10 21:55:38][Cipher: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 7,7,7,0,0,0,7,0,0,0,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,0,0,31,15,0,0]
13 TCP 192.168.1.6:60555 <-> 52.114.77.33:443 [proto: 91.212/TLS.Microsoft][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 11][cat: Cloud/13][18 pkts/5861 bytes <-> 13 pkts/7901 bytes][Goodput ratio: 80/89][2.79 sec][Hostname/SNI: mobile.pipe.aria.microsoft.com][bytes ratio: -0.148 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 192/269 2443/2490 625/741][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 326/608 1494/1506 448/617][Risk: ** TLS (probably) Not Carrying HTTPS **][Risk Score: 10][Risk Info: No ALPN][TLSv1.2][JA3C: e4d448cdfe06dc1243c1eb026c74ac9a][JA4: t12d220700_0d4ca5d4ec72_3304d8368043][ServerNames: *.events.data.microsoft.com,events.data.microsoft.com,*.pipe.aria.microsoft.com,pipe.skype.com,*.pipe.skype.com,*.mobile.events.data.microsoft.com,mobile.events.data.microsoft.com,*.events.data.msn.com,events.data.msn.com][JA3S: 986571066668055ae9481cb84fda634a][Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 4][Subject: CN=*.events.data.microsoft.com][Certificate SHA-1: 33:B3:B7:E9:DA:25:F5:A0:04:E9:63:87:B6:FB:54:77:DB:ED:27:EB][Firefox][Validity: 2019-10-10 21:55:38 - 2021-10-10 21:55:38][Cipher: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,16,11,0,0,5,0,0,0,5,5,0,0,11,0,5,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,22,0,0]
14 UDP 192.168.1.6:51681 <-> 52.114.77.136:3478 [proto: 125/Skype_Teams][IP: 276/Azure][Encrypted][Confidence: Match by port][DPI packets: 12][cat: VoIP/10][14 pkts/5838 bytes <-> 17 pkts/7907 bytes][Goodput ratio: 90/91][4.57 sec][bytes ratio: -0.151 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 347/256 2336/2336 693/595][Pkt Len c2s/s2c min/avg/max/stddev: 79/79 417/465 1243/1227 434/401][PLAIN TEXT (TBHSWF)][Plen Bins: 0,36,0,0,0,12,6,0,3,6,0,0,0,3,0,0,0,0,0,0,0,0,0,6,6,0,0,0,0,0,3,0,3,3,0,0,0,9,0,0,0,0,0,0,0,0,0,0]
14 UDP 192.168.1.6:51681 <-> 52.114.77.136:3478 [proto: 125/Skype_Teams][IP: 276/Azure][Encrypted][Confidence: Match by port][DPI packets: 12][cat: VoIP/10][14 pkts/5838 bytes <-> 17 pkts/7907 bytes][Goodput ratio: 90/91][4.57 sec][bytes ratio: -0.151 (Mixed)][IAT c2s/s2c min/avg/max/stddev: 0/0 347/256 2336/2336 693/595][Pkt Len c2s/s2c min/avg/max/stddev: 79/79 417/465 1243/1227 434/401][Risk: ** Susp Entropy **][Risk Score: 50][Risk Info: Entropy 7.83][PLAIN TEXT (TBHSWF)][Plen Bins: 0,36,0,0,0,12,6,0,3,6,0,0,0,3,0,0,0,0,0,0,0,0,0,6,6,0,0,0,0,0,3,0,3,3,0,0,0,9,0,0,0,0,0,0,0,0,0,0]
15 TCP 192.168.1.6:60547 <-> 52.114.88.59:443 [proto: 91.250/TLS.Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 14][cat: Collaborative/15][20 pkts/3926 bytes <-> 15 pkts/8828 bytes][Goodput ratio: 66/89][0.32 sec][Hostname/SNI: chatsvcagg.teams.microsoft.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.384 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 13/25 91/80 23/31][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 196/589 1494/1506 320/612][TLSv1.2][JA3C: ebf5e0e525258d7a8dcb54aa1564ecbd][JA4: t12d1311h2_8b80da21ef18_77989cba1f4a][Plen Bins: 0,21,10,5,0,5,10,5,0,0,0,5,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,5,21,0,0]
16 TCP 192.168.1.6:60565 <-> 52.114.108.8:443 [proto: 91.250/TLS.Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 5][cat: Collaborative/15][19 pkts/3306 bytes <-> 14 pkts/9053 bytes][Goodput ratio: 61/90][0.43 sec][Hostname/SNI: emea.ng.msg.teams.microsoft.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.465 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 27/12 276/54 68/17][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 174/647 1060/1506 238/633][TLSv1.2][JA3C: ebf5e0e525258d7a8dcb54aa1564ecbd][JA4: t12d1311h2_8b80da21ef18_77989cba1f4a][Plen Bins: 0,22,16,5,0,0,5,0,0,0,0,0,0,5,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,5,0,0,0,0,22,0,0]
17 TCP 192.168.1.6:60541 <-> 52.114.75.69:443 [proto: 91.125/TLS.Skype_Teams][IP: 276/Azure][Encrypted][Confidence: DPI][DPI packets: 10][cat: VoIP/10][13 pkts/4051 bytes <-> 9 pkts/7973 bytes][Goodput ratio: 79/92][0.14 sec][Hostname/SNI: eu-api.asm.skype.com][(Advertised) ALPNs: h2;http/1.1][bytes ratio: -0.326 (Download)][IAT c2s/s2c min/avg/max/stddev: 0/0 10/11 31/36 14/16][Pkt Len c2s/s2c min/avg/max/stddev: 66/66 312/886 1494/1506 422/676][TLSv1.2][JA3C: 74d5fa154a7fc0a7c655d8eaa34b89bf][JA4: t12d1312h2_8b80da21ef18_b00751acaffa][ServerNames: *.asm.skype.com][JA3S: 986571066668055ae9481cb84fda634a][Issuer: C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, OU=Microsoft IT, CN=Microsoft IT TLS CA 1][Subject: CN=*.asm.skype.com][Certificate SHA-1: B9:41:1D:AE:56:09:68:D2:07:D0:69:E1:68:00:08:2B:EF:63:1E:48][Validity: 2019-05-07 12:50:03 - 2021-05-07 12:50:03][Cipher: TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384][Plen Bins: 0,8,0,8,0,0,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,8,34,0,0]
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