Questions tagged [rootkit]

Questions about rootkits. What are signs that you got one? How to confirm or disprove the suspicion. Tools for the detection of rootkits.

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Rkhunter still relevant in 2022?

I tried using the RKHunter 1.4.6 (http://downloads.sourceforge.net/project/rkhunter/rkhunter/1.4.6/rkhunter-1.4.6.tar.gz) in Ubuntu20.04 , it is around 4 years old , running it did not find any ...
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Packages were installed during reboot - journal data added

I am running kubuntu 21.04. I just rebooted my system, and as kubuntu was starting up it installed several packages and rebooted again before reaching the login screen. I've never seen this behavior ...
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560 views

"insmod: ERROR: Could not insert module xxx.ko: Operation not permitted"

I try to install a rootkit to test chkrootkit, so I tried many rootkits from github and after I do make, I try insmod xxx.ko, but it dispalys this error: "insmod: ERROR: Could not insert module ...
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2 votes
1 answer
3k views

use debsums to automatically check all installed packages

I want to use debsumsto check integrity of all my packages with sudo dpkg -l | awk {'print $2'} | xargs | debsums |grep -v OK But I get those errors: debsums: can't open fwupd file /var/lib/polkit-...
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2 votes
1 answer
830 views

rkhunter shows a possible rootkit or a false possitive?

When I do an rkhunter --check it shows me that I have possible rootkits: /usr/bin/rkhunter: 14795: [: /usr/lib/firefox/firefox: unexpected operator /usr/bin/rkhunter: 14795: [: /usr/lib/firefox/...
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1 vote
0 answers
316 views

Rkhunter show me "warning"

Why rkhunter shows me a "warning" in /usr/bin/lwp-request? At the end of the dialog shows: Files properties checks... Files checked: 149 Suspect Files: 1 With ClamAV it ...
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3 votes
2 answers
1k views

A bootable rootkit scanner for Ubuntu?

I was just wondering, is there any good app for Ubuntu that you could burn on a DVD from an *.iso file, choose it from the boot menu before Ubuntu even starts and then scan the system externally for ...
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1 vote
1 answer
1k views

cat /dev/sda output contains references to malware

When using "cat /dev/sda" I see the word trojan appear a lot as well as many names of known trojans like Nymaim, Bedep and so on. Here is a snippet: b5928a2d2656ba5ef3001dc04350e5a0:399262:Win.Malwar ...
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3 votes
2 answers
3k views

chrootkit suspicious files and directory detected

I made a chrootkit scan.And it found something,it doesnt say any recommendations on the detection of the files or directories. Any suggestions? results are: The following suspicious files and ...
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1 answer
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Does Aide compare against repo versions or only against my own files?

Is there any point in installing Aide on a long-installed machine? or is it only trustworthy if installed immediately after a fresh install or run from thumb drive? Background: A non-techy friend ...
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2 votes
0 answers
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How did I get a rootkit? [duplicate]

I am running Ubuntu 14.04 32bit. Recently, I decided to install ClamAV. It keeps warning me about this pua.win.trojan.xored-1. I read online that this means I have a rootkit. I download and ran ...
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25 votes
4 answers
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chkrootkit shows "tcpd" as INFECTED. Is it a false positive?

Scan by chkrootkit shows "tcpd" as being INFECTED. Although a scan by rkhunter shows ok,(except for regular false positives) Shall I be worried? (I'm on Ubuntu 16.10 with 4.8.0-37-generic)
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8 votes
5 answers
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Preventing BIOS rootkit on Ubuntu Linux

Other than standard security "best practices" like having a good firewall, strong admin password, ensuring the latest security patches, and upping router security, is there anything more specific that ...
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1 vote
0 answers
240 views

chkrootkit reports tcpd to be infected, should I be worried? [duplicate]

I ran sudo chkrootkit today and was told this as a part of the output: Checking `tcpd'... INFECTED I am running Ubuntu GNOME 16.10 with GNOME 3.22, what does ...
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4 votes
2 answers
1k views

Could rootkits be effective for non-root users?

After mis-interpreting this question's meaning, I'm wondering if rootkits and other malicious programs could be effective if the user does not have root permissions. Rootkits usually trick users ...
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2 votes
1 answer
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Are rootkits something I should be concerned if I'm a normal user? [closed]

Hi recently I discovered that rootkits are a thing in Ubuntu too, and that their detection is hard. I has been pretty paranoid about getting one since I read about them. I have my firewall enabled, ...
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2 votes
1 answer
3k views

Suspect of keylogger/screen logger in Ubuntu machine [closed]

Seems my Ubuntu was hacked by a site while browsing. Is there a way that I can remove any logging software that may have been installed, or identify if a threat is present?
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20 votes
2 answers
1k views

Signature-based rootkit scanner?

Currently the only rootkit scanners I know of have to be installed on the machine before the rootkit so that they can compare file changes etc (e.g.: chkrootkit and rkhunter), but what I really need ...
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3 votes
1 answer
14k views

How to install rkhunter in ubuntu?

Ok I know the question sounds strange but I need help installing rkhunter the accurate way and do I need to follow all the steps in this article https://help.ubuntu.com/community/RKhunter?
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1 vote
1 answer
260 views

Is there any conflicts between running rkhunter and chkrootkit on one system?

Can I run rkhunter and chkrootkit at the same time on my Ubuntu Linux laptop without having to worry about conflicts?
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1 vote
0 answers
625 views

How to test rkhunter to make sure its functioning well?

I have a Ubuntu 15.10 Linux laptop PC with rkhunter installed now all I need to do is to confirm it working well like if there is an antivirus on your pc you will go to the eicar site and download the ...
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10 votes
1 answer
6k views

If I have clamav do I need to install rootkit hunter

So I have clamav the antivirus but is that a protection against rootkits or do I need to install rootkit hunter as well with clamav?
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0 votes
1 answer
1k views

ps does not work after upgrading to 14.04 (/usr/bin/dpkgd/ps: error while loading shared libraries)

I recently upgraded from Ubuntu 12.04 to 14.04, now on starting my terminal and running ps throws the following error : /usr/bin/dpkgd/ps: error while loading shared libraries: libproc-3.2.8.so: ...
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19 votes
3 answers
27k views

Chkrootkit says "Searching for Linux/Ebury - Operation Windigo ssh... Possible Linux/Ebury - Operation Windigo installetd", should I be worried?

I recently ran sudo chkrootkit and this was one of the results: Searching for Linux/Ebury - Operation Windigo ssh... Possible Linux/Ebury - Operation Windigo installetd In my research on this ...
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0 votes
1 answer
486 views

Is my computer secure?

I was using Rkhunter and this was displayed. [ Rootkit Hunter version 1.4.2 ] File updated: searched for 175 files, found 141 baymax@vostro:~$ sudo rkhunter -c --enable all --disable none --rwo ...
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2 votes
2 answers
2k views

Detecting rootkit without another computer

If a rootkit has been installed without my knowledge to remotely control the computer then I guess the Update manager should be affected too right, then the kernel updates etc... could be infected ...
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-2 votes
1 answer
154 views

I broke my Ubuntu 14.04 [closed]

For a college Security project, I had to write a rootkit module from my Ubuntu 14.04. The rootkit was not supposed to harm the kernel, just hide processes and ports. However after running the module ...
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0 votes
1 answer
119 views

Completely...I mean COMPLETELY wiping my hardrive

I am new to linux, a total noob to be exact. I am using ubuntu 14.04.2 I am having a problem with people at school who have somehow hacked my computer. I have formatted my hard drive 3 or 4 times ...
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  • 1
0 votes
1 answer
1k views

ubuntu folder permission changed to drwsrwsrwt and nautilus shows files and terminal doesn't

I am having wierd situation. I am using ubuntu 14.10. I can open all directories in nautilus but when I try to list files in terminal, only one directory get listed. I can traverse through the ...
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  • 143
0 votes
1 answer
207 views

APT_AUTOGEN setting just affecting the package being installed or all?

I have got rkhunter version 1.4.2, and I was just wondering about the APT_AUTOGEN option which I currently have enabled. Does this mean that when I install new software that it just adds that software ...
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5 votes
1 answer
11k views

rkhunter psswd and group file changes warning

Today I did a scan of my machine with rkhunter: sudo rkhunter --checkall And these were the warnings that I got: Checking for passwd file changes [ Warning ] Checking for ...
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12 votes
2 answers
15k views

chkrootkit scanner detected possible KLM Trojan

Today I scanned my machine with the chkrootkit tool by running: sudo chkrootkit And this was some of the output: Checking `lkm'... You have 2 process ...
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1 vote
1 answer
356 views

Checksum of system binaries changed

This morning I received several OSSEC notifications about changed integrity checksums. Affected files are /bin/mv, /bin/dir, /bin/pwd, /bin/chrgrp and about 50 similar binaries from /bin and /usr/bin. ...
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9 votes
4 answers
3k views

Got a virus on Windows and Ubuntu [closed]

TLTR: I've encountered a virus what affects both Windows 8.1 and Ubuntu 14.04. This virus was proven to be impossible to be detected/removed by 50+ most popular antivirus programs/rootkits. What to do?...
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  • 107
9 votes
6 answers
16k views

Popup ad virus on both chrome and firefox

A pop-up ad box appears whatever site I am opening. Tried resetting settings, disabling extensions, removing all users on chrome. It seems it is not about chrome since same thing happens on Firefox ...
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2 votes
2 answers
2k views

Rootkit scanner with graphical feedback or GUI

There are some rootkitscanners for linux, for example: chkrootkit rkhunter But How would I get notified on a desktop? Is it possible to get an alert, if the scanner found something?
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3 votes
1 answer
351 views

Root kit advice on ubuntu

I've been a Windows user for many years but recently Avast was bringing up 100's of Rootkit infected files. So I decided to make the switch to Ubuntu to wipe everything, and I’m quite enjoying the ...
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1 vote
2 answers
3k views

how to verify that sbin/init isn't infected?

for sometime chkrootkit has been showing sbin/init as being infected with SuckIt rootkit. early this year when the warning first appeared a quick google search indicated that it was most likely a ...
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2 votes
0 answers
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Scanning Windows for Rootkits using Linux

I know of ClamAV for viruses, but is there an option for scanning AND getting rid of "rootkits" from Windows from inside Linux i.e. Live boot USB? Also spyware and malware scanning would be nice too. ...
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1 vote
1 answer
6k views

Rkhunter 122 suspect files; do I have a problem?

I am new to ubuntu. I am using Xfce Ubuntu 14.04 LTS. I have ran rkhunter a few weeks age and only got a few warnings. The forum said that they were normal. But, this time rkhunter reported 122 ...
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3 votes
4 answers
559 views

myterious a.out file appeared in Downloads folder

Yesterday a file that should not exist appeared in my Downloads folder. Virustotal knows the file since 2012 and reports it as clean - but it seems other people have had it appear. Does anyone ...
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5 votes
1 answer
556 views

Rootkit on port 60001 !? Tiger says so - how do I verify? [closed]

My system is an up-to-date Ubuntu 13.10 I've installed Tiger and I'm getting this # Running chkrootkit (/usr/sbin/chkrootkit) to perform further checks... OLD: --ALERT-- [rootkit005a] Chkrootkit has ...
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  • 263
0 votes
1 answer
3k views

Infected by rootkit. How do I remove it?

Today, I launched tiger, which did report a root kit alert. Chkrootkit did agree. How can I remove this root kit ? How can I find how it was installed, so I can take care of the weakness in my Ubuntu ...
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2 votes
1 answer
6k views

eth0: PACKET SNIFFER(/sbin/dhclient [duplicate]

Im new to Ubuntu and would like help please, I ran ProShield and got this error - eth0: PACKET SNIFFER(/sbin/dhclient I ran the following programs below and nothing came up as far as I can see. ...
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2 votes
0 answers
989 views

/etc/thnuclnt/.thnumod - what is that file for?

~ > sudo find / -user root -perm -4000 -ls 710826 44 -rwsr-xr-- 1 root messagebus 42500 Окт 3 22:31 /lib/dbus-1.0/dbus-daemon-launch-helper 658951 464 -rwsr-xr-x 1 root root ...
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8 votes
1 answer
6k views

Rootkits: Should I be concerned?

I was reading some texts about rootkits and the tools used to remove them. I have Ubuntu 12.04.1 and rkhunter reported various warnings. I'm wondering what those are. BTW I install only original ...
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  • 957
2 votes
1 answer
1k views

Chkrootkit findings - what to do?

after my ubuntu runs slower and slower and google regularly asks me for prooving to be human, i had Chkrootkit running. here's what it found: wlan0: PACKET SNIFFER (/sbin/wpa_supplicant [870], /...
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  • 21
1 vote
2 answers
1k views

Networking security issue with suspicious traffic. How to track it down?

I have specific problem a bit advanced for me. On my router log I have seen following lines: Internal Prot. External NAT Time-out 192.168.0.167:56396 TCP 186....
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4 votes
0 answers
416 views

Are Virus/rootkits via ubuntu updates possible? [duplicate]

Possible Duplicate: How is the system kept secure? What security policies exist in place for packages and scripts? I fear that just like on Windows there might be ways to catch a malware/virus/...
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7 votes
2 answers
8k views

How do I remove rootkits?

To my understanding, rootkits on linux infect the kernel to get root privileges and there are many scanners (I use rkhunter) to scan for rootkits in the kernel, but I have yet to find a program that ...
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