Deep Dive into Parsing SSH Keys To Exploit Improperly Sanitized Screenshots

IppSec · Beginner ·🔐 Cybersecurity ·3y ago
00:00 - Intro 00:55- Generating our SSH Key and Base64 Decoding it 02:15 - Opening the SSH Key in Bless 03:45 - Showing information from the SSH RFC which will tell us what we are parsing 04:25 - Start of parsing the SSH Key 07:00 - Opening an Encrypted Key and showing the slight changes 10:15 - Back to the unencrypted SSH Key and showing the private key does contain the private key 12:10 - Extracting the Exponent and N our of the Public Key portion 14:30 - Start of Private Key Information in the Private Key 16:00 - Extracting the variables from the Private Key Field 18:15 - Extracting Q, which is the big prime that we used in Response to rebuild the key 19:00 - Showing the comment which contains the username and hostname of the person that generated the key 20:40 - Extracting E/N from the Public Key 23:00 - Extracting Q from the Private Key again and using RsaCtfTool to generate the key
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Chapters (13)

Intro
2:15 Opening the SSH Key in Bless
3:45 Showing information from the SSH RFC which will tell us what we are parsing
4:25 Start of parsing the SSH Key
7:00 Opening an Encrypted Key and showing the slight changes
10:15 Back to the unencrypted SSH Key and showing the private key does contain the p
12:10 Extracting the Exponent and N our of the Public Key portion
14:30 Start of Private Key Information in the Private Key
16:00 Extracting the variables from the Private Key Field
18:15 Extracting Q, which is the big prime that we used in Response to rebuild the k
19:00 Showing the comment which contains the username and hostname of the person tha
20:40 Extracting E/N from the Public Key
23:00 Extracting Q from the Private Key again and using RsaCtfTool to generate the k
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