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Netux

@pancake @j3s ashamed to admit I didn't even think of sigstop. So rare that I use signals beyond kill and int.
Regex of just matching text, not any magic. Still a regex.

31 Aug 2023 at 15:46 | Wall-to-wall | Open on mastodon.sdf.org
3 comments
pancake :verified:

@Netux @j3s i use ^Z a lot, the problem with regexes is that they are suposed to run on a limited space in memory. this is, if you use strings is fine, but when searching in memory, the regex expression can expand to read 4GB of memory to find a matching token, and this is not really optimal. Most forensic tools supporting regexes restrict the contents to search in or add limits to the regex engine

31 Aug 2023 at 16:45 | Open on infosec.exchange
Netux

@pancake @j3s suppose restricting it to the data segment wouldn't be too hard. Not enough experience on the exploit side of things to know if proc makes it easy to do. Cat through awk maybe? Cat is unbuffered, right? I know you can set grep to be.

31 Aug 2023 at 20:26 | Open on mastodon.sdf.org
pancake :verified:

@Netux @j3s the only way to use procpidmen is via mmap so cat wont work. And yes its possible and desirable to define boundaries when searching on raw memory. Actually the maps file describes the heap, etc so you can use e search.in=io.maps.rw and that would reduce the search to the writable maps. Which is where the user data is stored and avoid scanning the code ir readonly segments

1 Sep 2023 at 0:07 | Open on infosec.exchange
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