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- About jjurdi
01-03-2018
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Jan 03, 2018Last Visited
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Latest posts by jjurdi
| Subject | Views | Posted |
|---|---|---|
| 3719 | 12-22-2017 01:08 PM | |
| 3742 | 12-22-2017 11:17 AM | |
| 3746 | 12-22-2017 10:42 AM | |
| 3754 | 12-22-2017 09:04 AM | |
| 4344 | 12-21-2017 01:59 PM |
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| Member Since | 12-20-2017 03:51 PM |
| Date Last Visited | 01-03-2018 01:13 PM |
| Posts | 5 |
12-22-2017
01:08 PM
I thought that might be the case. Here are some data sections: 0000 a0 05 00 60 00 00 00 00 c4 a3 af 48 99 56 b6 b4 0010 c7 8e 9e d1 c8 55 20 37 04 02 03 01 00 01 a1 aa 0000 a0 05 00 60 47 00 00 00 00 00 00 00 00 00 00 00 0010 00 00 00 00 00 00 00 00 04 02 03 08 00 00 a1 aa 0020 61 64 6d 69 6e 26 26 44 37 31 41 45 39 38 33 37 0030 31 42 33 33 35 37 42 36 34 45 38 31 34 30 32 36 0040 41 37 44 39 44 33 42 41 43 33 41 43 43 31 41 39 0050 46 31 30 46 31 46 32 32 43 44 32 42 43 35 43 46 0060 31 36 38 39 38 32 43 0000 a4 00 00 00 00 00 00 00 07 00 00 00 00 00 00 00 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 f4 00 00 00 55 00 00 00 00 00 00 00 00 00 00 00 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0020 54 72 61 6e 73 61 63 74 69 6f 6e 49 44 3a 31 0d 0030 0a 4d 65 74 68 6f 64 3a 47 65 74 50 61 72 61 6d 0040 65 74 65 72 56 61 6c 75 65 73 0d 0a 50 61 72 61 0050 6d 65 74 65 72 4e 61 6d 65 3a 44 61 68 75 61 2e 0060 44 65 76 69 63 65 2e 44 65 63 6f 64 65 2e 43 66 0070 67 0d 0a 0d 0a 0000 f6 00 00 00 5a 00 00 00 34 02 00 00 00 00 00 00 0010 5a 00 00 00 00 00 00 00 fa 02 d2 13 00 00 00 00 0020 7b 20 22 69 64 22 20 3a 20 35 36 34 2c 20 22 6d 0030 65 74 68 6f 64 22 20 3a 20 22 61 6c 61 72 6d 2e 0040 67 65 74 41 6c 6c 49 6e 53 6c 6f 74 73 22 2c 20 0050 22 70 61 72 61 6d 73 22 20 3a 20 6e 75 6c 6c 2c 0060 20 22 73 65 73 73 69 6f 6e 22 20 3a 20 33 33 32 0070 35 33 30 34 32 36 20 7d 0a 00 f6 00 00 00 5b 00 0080 00 00 35 03 00 00 00 00 00 00 5b 00 00 00 00 00 0090 00 00 fa 02 d2 13 00 00 00 00 7b 20 22 69 64 22 00a0 20 3a 20 38 32 31 2c 20 22 6d 65 74 68 6f 64 22 00b0 20 3a 20 22 61 6c 61 72 6d 2e 67 65 74 41 6c 6c 00c0 4f 75 74 53 6c 6f 74 73 22 2c 20 22 70 61 72 61 00d0 6d 73 22 20 3a 20 6e 75 6c 6c 2c 20 22 73 65 73 00e0 73 69 6f 6e 22 20 3a 20 33 33 32 35 33 30 34 32 00f0 36 20 7d 0a 00 a4 00 00 00 00 00 00 00 1a 00 00 0100 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0110 00 00 00 00 00 0000 f4 00 00 00 59 00 00 00 00 00 00 00 00 00 00 00 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0020 54 72 61 6e 73 61 63 74 69 6f 6e 49 44 3a 34 0d 0030 0a 4d 65 74 68 6f 64 3a 47 65 74 50 61 72 61 6d 0040 65 74 65 72 56 61 6c 75 65 73 0d 0a 50 61 72 61 0050 6d 65 74 65 72 4e 61 6d 65 3a 44 61 68 75 61 2e 0060 44 65 76 69 63 65 2e 52 65 63 6f 72 64 2e 47 65 0070 6e 65 72 61 6c 0d 0a 0d 0a 0000 a1 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0000 a4 00 00 00 00 00 00 00 08 00 00 00 00 00 00 00 0010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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12-22-2017
11:17 AM
Here are a few lines from the capture with the source and destination IPs removed. Is there enough info here or do you need more packet details. No.,"Time","Source","Destination","Protocol","Length","Info" 1,"0.000000","EXTERNALIP","DESTIP","TCP","74","52771 > 37777 [SYN] Seq=0 Win=65535 Len=0 MSS=1390 SACK_PERM=1 TSval=27981135 TSecr=0 WS=4" 2,"0.000329","172.20.0.11","EXTERNALIP","TCP","74","37777 > 52771 [SYN, ACK] Seq=0 Ack=1 Win=28960 Len=0 MSS=1460 SACK_PERM=1 TSval=14910032 TSecr=27981135 WS=32" 3,"0.064911","EXTERNALIP","DESTIP","TCP","66","52771 > 37777 [ACK] Seq=1 Ack=1 Win=83400 Len=0 TSval=27981147 TSecr=14910032" 4,"0.122998","EXTERNALIP","DESTIP","TCP","98","52771 > 37777 [PSH, ACK] Seq=1 Ack=1 Win=83400 Len=32 TSval=27981152 TSecr=14910032" 5,"0.123359","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=1 Ack=33 Win=28960 Len=0 TSval=14910164 TSecr=27981152" 6,"0.125416","172.20.0.11","EXTERNALIP","TCP","150","37777 > 52771 [PSH, ACK] Seq=1 Ack=33 Win=28960 Len=84 TSval=14910166 TSecr=27981152" 7,"0.204895","EXTERNALIP","DESTIP","TCP","66","52771 > 37777 [ACK] Seq=33 Ack=85 Win=83400 Len=0 TSval=27981161 TSecr=14910166" 8,"0.212851","EXTERNALIP","DESTIP","TCP","169","52771 > 37777 [PSH, ACK] Seq=33 Ack=85 Win=83400 Len=103 TSval=27981162 TSecr=14910166" 9,"0.213332","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=85 Ack=136 Win=28960 Len=0 TSval=14910254 TSecr=27981162" 10,"0.217426","172.20.0.11","EXTERNALIP","TCP","98","37777 > 52771 [PSH, ACK] Seq=85 Ack=136 Win=28960 Len=32 TSval=14910258 TSecr=27981162" 11,"0.304043","EXTERNALIP","DESTIP","TCP","98","52771 > 37777 [PSH, ACK] Seq=136 Ack=117 Win=83400 Len=32 TSval=27981171 TSecr=14910258" 12,"0.304514","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=117 Ack=168 Win=28960 Len=0 TSval=14910345 TSecr=27981171" 13,"0.304870","172.20.0.11","EXTERNALIP","TCP","113","37777 > 52771 [PSH, ACK] Seq=117 Ack=168 Win=28960 Len=47 TSval=14910345 TSecr=27981171" 14,"0.391928","EXTERNALIP","DESTIP","TCP","183","52771 > 37777 [PSH, ACK] Seq=168 Ack=164 Win=83400 Len=117 TSval=27981179 TSecr=14910345" 15,"0.392632","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=164 Ack=285 Win=28960 Len=0 TSval=14910433 TSecr=27981179" 16,"0.392811","EXTERNALIP","DESTIP","TCP","343","52771 > 37777 [PSH, ACK] Seq=285 Ack=164 Win=83400 Len=277 TSval=27981179 TSecr=14910345" 17,"0.393398","172.20.0.11","EXTERNALIP","TCP","271","37777 > 52771 [PSH, ACK] Seq=164 Ack=285 Win=28960 Len=205 TSval=14910434 TSecr=27981179" 18,"0.399131","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=369 Ack=562 Win=30048 Len=0 TSval=14910434 TSecr=27981179" 19,"0.399360","172.20.0.11","EXTERNALIP","TCP","187","37777 > 52771 [PSH, ACK] Seq=369 Ack=562 Win=30048 Len=121 TSval=14910440 TSecr=27981179" 20,"0.399531","172.20.0.11","EXTERNALIP","TCP","187","37777 > 52771 [PSH, ACK] Seq=490 Ack=562 Win=30048 Len=121 TSval=14910440 TSecr=27981179" 21,"0.409293","172.20.0.11","EXTERNALIP","TCP","774","37777 > 52771 [PSH, ACK] Seq=611 Ack=562 Win=30048 Len=708 TSval=14910445 TSecr=27981179" 22,"0.469436","EXTERNALIP","DESTIP","TCP","66","52771 > 37777 [ACK] Seq=562 Ack=611 Win=84472 Len=0 TSval=27981189 TSecr=14910433" 23,"0.501429","EXTERNALIP","DESTIP","TCP","187","52771 > 37777 [PSH, ACK] Seq=562 Ack=1319 Win=85888 Len=121 TSval=27981190 TSecr=14910445" 24,"0.502095","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=1319 Ack=683 Win=30048 Len=0 TSval=14910543 TSecr=27981190" 25,"0.504167","172.20.0.11","EXTERNALIP","TCP","342","37777 > 52771 [PSH, ACK] Seq=1319 Ack=683 Win=30048 Len=276 TSval=14910545 TSecr=27981190" 26,"0.573642","EXTERNALIP","DESTIP","TCP","98","52771 > 37777 [PSH, ACK] Seq=683 Ack=1319 Win=85888 Len=32 TSval=27981198 TSecr=14910445" 27,"0.574079","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=1595 Ack=715 Win=30048 Len=0 TSval=14910615 TSecr=27981198" 28,"0.613621","172.20.0.11","EXTERNALIP","TCP","98","37777 > 52771 [PSH, ACK] Seq=1595 Ack=715 Win=30048 Len=32 TSval=14910615 TSecr=27981198" 29,"0.613814","EXTERNALIP","DESTIP","TCP","98","52771 > 37777 [PSH, ACK] Seq=715 Ack=1595 Win=87304 Len=32 TSval=27981202 TSecr=14910545" 30,"0.614158","172.20.0.11","EXTERNALIP","TCP","66","37777 > 52771 [ACK] Seq=1627 Ack=747 Win=30048 Len=0 TSval=14910655 TSecr=27981202"
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12-22-2017
10:42 AM
Hello Benjamin, I have gathered some packets, but do not know what types of identifers I'm looking for to make up a signature. Do you have any examples or could I PM you some of the capture? Thank you! Jon
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12-22-2017
09:04 AM
Hello All, I am working on creating a custome signature for a Dahua NVR that we would like to allow remote access to. It operates on port 37777 which has been allowed, but traffic still shows up as unknown-tcp and is subsiquently blocked. Does anyone have experience working with one of these devices or creating a signature for it? We opened up the rules to allow any application and was able to capture some traffic while using it. Would this be enough to create a signature? Thank you all in advance! Jon
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12-21-2017
01:59 PM
I am having the same exact issue with an application that does not seem to have a signature right now. If I send over a capture that I took of this traffic might you be so kind as to help create a custom signature?
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