From: Ernie Rael <err@raelity.com>
To: cygwin@cygwin.com
Subject: Re: sshd.exe infected with IDP.Generic?
Date: Sat, 11 Jul 2020 07:47:50 -0700 [thread overview]
Message-ID: <0d7fac03-61f9-d512-8cb5-a643a361f2a3@raelity.com> (raw)
In-Reply-To: <14cda058-251c-21f2-e153-edf37ef9ef91@raelity.com>
Thanks for response Marco and Brian.
I guess I'll chalk up to coincidence the "rm *" that I didn't knowingly
type (it was in the typeahead buffer when less finally finished and I
had been "randomly" hitting keys to get it to end) followed shortly
thereafter by avast moving sshd.exe to quarantine. I suppose the command
could have mysteriously come from some history since I do use the rm
command regularly ;-) Hmm, use -I? I lost almost nothing since the admin
acct in cygwin's /home is only used for ssh to local and there are
backups to look at.
As far as getting things back to normal...
Asking avast to "put it back" failed. I did "extract" it, but
owner/permissions seem screwed up.
> $ ls -l sshd.exe
> ----rwxr-x+ 1 Administrators SYSTEM 721939 Feb 18 09:05 sshd.exe
I put it back, with u+rx, ran cygwin's setup and it's package had been
updated recently, sshd was updated, and things seem back to normal.
First I had virus scanned the entire system, took all day, it did find
something in an archived copy of a system I had 10 years ago.
-ernie
PS virustotal is cool
https://www.virustotal.com/gui/file/8cba0094cf589c9b39c6814ae11e7fc32e0d9988e280004b6a18ca7e2014c71d/detection
On 7/10/2020 12:01 PM, Ernie Rael wrote:
> On Win7. To get an elevated shell, I typically do "$ ssh xxx@yyy". And
> not very often.
>
> Below is an excerpt of something potentially horrible that just happened.
>
> Note the
>
> rm *
>
> I exited the shell. I did the "ssh..." again (yeah I'm crazy), in a
> different bash window. And this time avast reported that it stashed
> sshd.exe into the virus chest.
>
> I'm not sure who/what the culprit is, or what's going on. But it does
> look like there was (is?) some kind of infection somewhere on my
> system. I had used ftp earlier to put a file to a remote, but...?
>
> I didn't realize that netstat was a windows command (not that I
> wouldn't have used it).
>
> I've got the sshd.exe file. It has a date of Feb 18. So
>
> * Can I check if the bits in sshd.exe are as expected?
> * Any suggestions on cleaning up and/or restoring sanity? (I'm running
> a full virus scan right now, should be amusing...)
> * How can I get sshd.exe back? Is there a cygwin command to check that
> the packages are all as they should be?
>
> -ernie
>
> =============== EXCERPT ==========================
>
>>
>> $ ssh xxx@yyy
>> Last login: Mon May 18 21:37:37 2020 from 192.168.0.11
>> ____________________, ______________________________________
>> .QQQQQQQQQQQQQQQQQQQQQQQQL_ | |
>> .gQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ__
>> | |
>> ........
>>
>> ADMIN ~
>> $ netstat -b -a | less
>>
>>
>> ######################### worked but had to ^Z/kill to get out
>>
>> ADMIN ~
>> $
>>
>> ADMIN ~
>> $
>>
>> ADMIN ~
>> $ rm *
>> rm: cannot remove 'play': Is a directory
>> rm: cannot remove 'system': Is a directory
>>
>> ADMIN erra@spirit ~
>> $
>>
>>
>> ADMIN ~/play
>> $ netstat -b -a | less
>>
>> ######################### let netstat complete normally, got out of
>> less ok
>>
>>
>> ADMIN ~/play
>> $ client_loop: send disconnect: Connection reset by peer
>
> --
> Problem reports: https://cygwin.com/problems.html
> FAQ: https://cygwin.com/faq/
> Documentation: https://cygwin.com/docs.html
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next prev parent reply other threads:[~2020-07-11 14:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-10 19:01 Ernie Rael
2020-07-10 19:59 ` Marco Atzeri
2020-07-10 20:37 ` Brian Inglis
2020-07-11 14:47 ` Ernie Rael [this message]
2020-07-11 19:45 ` Brian Inglis
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