Ubuntu Security :: Warning Signs Of Having Been Hacked
Feb 19, 2011
I had a serious breach of the cellular segment of my communications network this week. All I can say is nobody got hurt. The attackers also knew where to find me via email. I'm concerned that perhaps they've penetrated this aspect of my system as well, although they seemed pretty specifically focused on the phone. There have been no changes on anything on my computer, and of course, I went ahead and changed all the passwords. How can I verify or at least look into the possibility of having been hacked as well.
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Jan 25, 2010
Today any web browser I use has randomly been brining me to URL... at random intervals.I've run chkrootkit from a live cd, and rkhunter, clamav, f-prot, and bitdefender, nothing's unusual.All the definitions were up to date.I'm wondering if its possible that my router got hacked. I'm not sure this is even possible, but it's acting weird. Tried reflashing its firmware, didn't fix it.
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Mar 8, 2010
I want to know if any one hacked or getting into my computer. I am using lucidlynx right now, My computer directly connected to modem, not using any wireless router. How can i check if some one hacked? How to prevent it?
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Jan 3, 2011
I have a 6yo laptop...z60m. Solid little thing that I knocked around so much the hinge broke. My dad jerryrigged it so it can stay open.
So now I use it as a glorified DVD player. Then, around February the hard drive died. I put it in fresh, loaded a couple of regular games and the DVD modifications to play DVD's. So, besides the basic upgrade to 9.1 not much as been done.
Well, last week my panel disappeared. I procrastinated and last night I got on the computer. I did F2 and "xfce-panel" and my panel reappeared exactly how I'd last tweaked it.
With on exception. This blue globe, "Akonadi" had mysteriously appeared.
Thing is that I haven't installed or updated anything for 8 months...why? becuase I haven't had this thing connected to the Internet. The wireless tower has been on. (my bad) but all of the signigals in my neck of the wood are encripted so I just let it be.
I don't know where this program came from. Is it loaded in xubuntu? Why would it show up? And furthermore if there was someone with malicious intent (unfortunatly I do have to take that into consideration) have put this on for data collection?
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Feb 27, 2011
I have windows computer and it is being hacked.About month ago or more some one hacked my router and install new firmware from Firmware Version: Talisman/Basic V1.2.9a
My router is linksys and SSID got changed to sveasoft.I had WPA set up and MAC filtering .
Some one hacked my router and change Firmware Version.And user name and password also got change to just admin.
Well now I got a pop up from my Kaspersky saying network attack scan.generic.TCP 74.63.245.168
only thing I can find on it http://whatismyipaddress.com/ip/74.63.245.168
It is Limestone Networks in Dallas.
Some strang things have been happing to my computer in past 4 months and is getting worse.
I have no firewall or router now.And have not gone to the store and get new router yet and I'm thinking of formatting my computer and putting linux and get good firewall like zone-alarm.
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Mar 22, 2011
my computer has been surely hacked for at least more than two months; my private information are being hacked and spread around! I initally used Windows Vista and I had the firewall off and no antivirus software. When I realized that my OS had been hacked, I began turning my firewall on and installing security softwares, but nothing stopped the hack.
Yesterday, I erased all my partitions and installed Ubuntu 10.10. I installed rkhunter and a firewall. I changed my static IP adress, at least for the sake of knowledge, to another one, then I got disconnected since my router only allows my old IP.
When I'm about to write my admin password, I disconnect from the network. I've scanned my system using rkhunter, and the result is a list of 30 suspicious files!
Can I adjust my router in a way that it can allow any IP adress? If yes, can I have a non-static IP adress? How to prevent the hacking in the first place? However, I believe, I don't know yet, that my Ubuntu has also been hacked...
If I can't get rid of the hacker(s), then I should permanently disconnect from internet and find another way to receive information anonymously through the internet.
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Apr 11, 2011
Awoke to millions of failed SSH attempts into my public server. Behind a firewall which forwards only SSH and HTTP. Local iptables deny everything except SSH and HTTP. Exact same symptoms and results as Chris over at his site: here.I just want to know how they managed to execute a script, or make changes etc? Here's some info:According to cat /var/log/secure | grep "Accepted" no one besides myself gained entry via SSH.The FTP account (500:48 (Purposely in apache group)) is chrooted to a 775 directory and vsftpd does not accept anonymous entry. vsftpd and xferlog's are empty?
Code:
You have new mail in /var/spool/mail/root
[root@dev etc]# tail /var/spool/mail/root
[code]....
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Jul 3, 2009
I have LAN with 20 machines. I see that one of them is infected. Its sending a lot of packets to the internet. My internet connection at this momment is realy slow. What should I do? How to detect which machine is infected? I'm using hardware firewall. Fortigate... Its hard to configure there nice logs. Any good software. I don't want to switch off network cable from each machine and check.
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Nov 14, 2010
I always use professional services to secure my servers. Everything was fine for years but a week ago my server got hacked.I don't know how the hacker got my username/password - it was not something like admin, password.9 months ago my PC was infected with some virus which connected to the FTP server by using password which was saved in CuteFTP and infected all index files with some javascript. Then I changed the user/FTP password and didn't save it anymore in Cute FTP. Of course, I checked all the folders and re-uploaded all infected files. Is it possible that this virus uploaded some hidden file which was able to get the new password for this account?
The server was hacked from so called Tor IP address. I am tiref of worrying about server security and now have an idea to get a static IP address from my ISP and to allow logins only from this IP address. What do you think about it? This idea looks good for me but are there any risks to lose access to the server. Can ISP provider change the static IP address for some reason?
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Apr 13, 2010
I need to know whether Ubuntu can be hacked when it is installed as a dual boot with W7 by hacking windows and getting access to the Ubuntu partition?
What I would also like to know if this way can be used to put a key logger or screen capture in Ubuntu which installs next time Ubuntu is started?
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Apr 28, 2010
I believe it is a keylogger because my Facebook account has been hacked, I believe my email has as well. I heard that even if you reformat a harddrive, the virus could still sit there and apparently that is what happened to me. how to be rid of it and keep my security. I installed RKhunter and Chkrootkit. Rkhunter reports warning files while checking my filesystem. I can post a log if need be.
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Jun 19, 2010
My server (Ubuntu 10.04 desktop) was hacked. I had my ethernet plugged in to an Intel 82557 Ethernet Pro card (Pulse) when my server was first attacked. After it was attacked I reinstalled the system but my ethernet card still would not work. Ubuntu recognized it, but it is continually disconnected and the little status lights on the card do not light up anymore.
So then I plugged the ethernet to the mother board itself. Well, my server was hacked again and now the ethernet on the motherboard does not work. Again, Ubuntu (after a reinstall) recognizes the hardware but nothing happens when I plug the etherent in. The motherboard is a BioStar P4M900 VIA chipset. I have a few of the system logs here [URL] which I saved right after the first attack.
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Nov 18, 2010
A scan on my computer reported as up many local ips which simply does not exist in my network. This host is supposed to have ip 192.168.0.4, but all other ip should not be there. I have a USB modem connected to a Linux box, connected itselfs to a wifi linksys router and thats it.
# nmap -sP '192.168.*.*' | grep -v down
Starting nmap 3.81 ( http://www.insecure.org/nmap/ ) at 2010-11-18 21:46 CET
Host 192.168.0.4 appears to be up.
Host 192.168.7.27 appears to be up.
Host 192.168.10.0 appears to be up.
[Code]...
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Jun 13, 2011
I just got control over a server that was hacked several months back. The other day we started receiving rejected emails sent from my server to a yahoo email address that is no longer active that contained users login information. I am trying to find the process that is sending these emails. So far its been like finding a needle in a haystack. The email that is being sent is appending the login information each time it is sent so there must be a local file that contains this information. I have tried using grep and find without any luck.
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Apr 9, 2010
I've discovered that after restoring my site's backup this has happened to me again. How to delete the hacked /home/crocbits directory so that I can restore the backup under the same username. When I try to delete /home/crocbits I get this message when logged in as root:
[Code]...
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Oct 8, 2010
How to secure a Terminal Server. so that it can't be hacked by bruteforce/divtionary tools ?
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Apr 26, 2011
I just got an email from google saying my site contained malware. It has a line in it: "<script src='http://whitepix.info/3'></script>". I've noticed its recursively in all my .html and .txt files in my website. Can I make a linux script to run that will go through all my .html and txt files recursively and delete that line from them? I don't know how it got in all of them.
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Jan 3, 2011
My server is probaly hacked and sending spam emails. I see them randomly in maillog (/usr/local/psa/var/log/maillog, server has a plesk panel), sometimes a few in a long time, sometimes a lot of them.Here is a sample of it:
Jan 4 00:47:08 acv360 qmail-remote-handlers[17662]: Handlers Filter before-remote for qmail started ...
Jan 4 00:47:08 acv360 qmail-remote-handlers[17662]: from=root@acv360.com
[code].....
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Jun 22, 2010
I have a server hacked when i try to log in i type root but won't let me type a passwdthere are no services up, can't see page mail nothing
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Apr 27, 2010
I have an Asus 900 laptop that I put Ubuntu 9.10 on.I know it was made by the Chinese, but why are they trying to hack my pc?I currently put FIRESTARTER a linux firewall on board you can go here to get itNow I can see everyone's IP address and find out where they are and who they are!!
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Jul 13, 2011
Just I install the rkhunter tool via apt-get install rkhunter. When I had run the rkhunter check, rkhunter comes with a warning about "GasKit Rootkit", i dont understand what it is
This server is install new last and maby 1 week old, so i don't understand why this happends.
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Mar 2, 2011
I'm having problems with the Empathy MSN on Ubuntu 10.10.I have searched the web but haven't found anything particular about this.I'm trying to log in but it stays on "Connecting" forever, doesn't go anywhere else.But it's still logging in, how do I know that?When I'm on msn on my other computer (which runs W7) and I try to log in into Empathy, I get signed out from my W7 MSN. This happens because I happen to log in from another place. In this case, that means that Empathy is logging me in, but it's still stucks on "Connection".
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May 9, 2010
Using slackware 12.2, xfce, Firefox 3.0.16 and for the past few days i have been getting Persistent System Security Window that looks like MS Firewall and you can't click on the X or Cancel because then it activates a so called security analysis with green progress bar. I open a terminal real quick and issue pkill firefox command.I have been trying to get to the basicconfig site to follow tutorial on firefox security update but that window keeps comming back.I emptied out my /tmp files but i am still having same problem and don't know what to do
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Feb 1, 2011
When I scanned my Ubuntu 10.04 with rkhunter a root kit hunter toolkit, it gave following warning:
Is there something that I have to worry about.
Code:
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Jun 3, 2011
I'm trying to follow this guide http://tech.blog.box.net/2007/06/20/how-to-debug-php-with-vim-and-xdebug-on-linux/ and I need to compile Vim with signs and python options.I have: downloaded the latest source with hg clone https://vim.googlecode.com/hg/ vim uncommented the signs feature in src/feature.hran ./configure --enable-perlinterp --enable-pythoninterp with no errorsran make with this output and errors that I don't understand and can't find on google:
$ make
gcc -c -I. -Iproto -DHAVE_CONFIG_H -DMACOS_X_UNIX -no-cpp-precomp -g -O2 -D_FORTIFY_SOURCE=1 -o objects/ex_cmds.o ex_cmds.c
[code]....
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Jan 9, 2010
I've scanned my computer (I'm using Ubuntu 8.04 Hardy Heron) and ClamAV has issued it has found a virus called Exploit.PDF-9669. What seems strange to me is that such a warning always happens (or, at least, in the most cases) in the same folder tree "sys" and ClamAV issues the very same virus/malware warning (Exploit.PDF-9669).
An example:
sys/devices/virtual/vtconsole/vtcon0/uevent: Exploit.PDF-9669 FOUND
sys/devices/virtual/net/ppp0/address: Exploit.PDF-9669 FOUND
sys/devices/virtual/net/ppp0/broadcast: Exploit.PDF-9669 FOUND
sys/devices/LNXSYSTM:00/device:00/uevent: Exploit.PDF-9669 FOUND
My ClamAV version is 0.94.2/10275/Fri Jan 8 22:06:46 2010. It has been not updated since I installed Hardy in my computer last year. Is my computer in danger?
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Mar 30, 2011
I'm relatively new to Ubuntu and these forums. I ran rkhunter, and saw this warning in the check for backdoor ports: [14:45:09] Warning: Network TCP port 32982 is being used by /usr/bin/python2.6. Possible rootkit: Solaris Wanuk Use the 'lsof -i' or 'netstat -an' command to check this. I also saw these warnings toward the bottom:
[Code]....
I was wondering first of all about the first warning, the port. I have a feeling that the second set of warnings are false positives, but I would be open to thoughts on that as well.
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Mar 17, 2011
i get this warning from selinux :
"SELinux is preventing /bin/mailx from append access on the file /var/lib/rkhunter/rkhcronlog.OmRFCZOynG."
I tried to fix it by "# /sbin/restorecon -v /var/lib/rkhunter/rkhcronlog.OmRFCZOynG" as suggested by SELinux but it comes back with another warning, but with a different /rkhcronlog.xxxxxxxxx...
i think its just a way of rkhunter logging issue -. attached here is the actual error message by selinux.
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May 11, 2011
I am running a fresh installation of RHEL 6 box and it shipped with Openssh 5.3.But, /etc/ssh/moduli file doesn't exist even in this new installation and the SSH log warns as below:PHP Code:WARNING: /etc/ssh/moduli does not exist, using fixed modulusDoes this imply that it is using the same random number for key exchange purpose ? Also, does it impose any security risks
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Apr 9, 2011
Sometimes when I try to open some chat application i get a strange warning message asking for password. The message is that /usr/libexec/mission-control is trying to gain access of the system, please provide the password. On top of the message box it shows "Unlock Keyring".
This very weird, as I am also unable to do a print-screen when this message box is up.
what this message is all about and what does the executable /usr/libexec/mission-control do?
I am using Empathy as my chat application
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