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Watchbog - Bluekeep Botnet Coinminer Malware Information

    • Updated:
    • 13 Aug 2020
    • Product/Version:
    • Deep Discovery Inspector All
    • Deep Security All
    • Platform:
Summary

Watchbog is a crytomining malware which uses Bluekeep vulnerability to infect Linux machines.

Capabilities

  • Exploit
  • Information Theft
  • Persistence

Symptoms

  • High CPU Usage
  • Continuous Detection of PUA.Linux.ZYX.USELVES19

Analysis

Based on research, main malware is (26ebeac4492616baf977903bb8deb7803bd5a22d8a005f02398c188b0375dfa4)

Module state

After running crontab -l, suspicious entries were found

Module state

Here are the full details of the location.

/var/spool/cron/root
/var/spool/cron/crontabs/root
/etc/cron.d/apache
/etc/cron.d/system
/etc/cron.d/root

Module state

Full code from "LaunchString" shows the following:

Module state

Indicators of Compromise

DetectionsIOC
TROJ_FRS.VSNTGQ191db603370e30234ca2cbd5cd84f5683f76f21513
Coinminer.Linux.MALXMR.UWEKF9e6634a0990b85bce93662a044aff6660cb46ac6
Trojan.Linux.GAFGYT.USELVEI19/tmp/.tmpdropoff/rig.tar.xz(rig.tar(xmr-stak-linux-2.10.3-cpu/xmr-stak))
PUA.Linux.ZYX.USELVES19/tmp/.tmpdropoff/rig.tar.gz(NONAMEFL(xmrig-2.14.1/xmrig))
Details
Public

Solutions Available

TM DetectionOPR
TROJ_FRS.VSNTGQ1915.617.00
Coinminer.Linux.MALXMR.UWEKF15.606.04
Trojan.Linux.GAFGYT.USELVEI1915.119.00
PUA.Linux.ZYX.USELVES1915.139.00

Manual clean-up process:

  1. Delete the running process. You can use the command "ps aux" and look for the entry like below:

    Module state

    then kill it using process ID:

    kill -9 <Process ID>

    Note that if watchbog is still running, delete the process as well.

  2. Overwrite/clean the cron tabs. Use any of the following:
    • crontab -e
    • echo " " > <crontab location> (Note that this will overwrite.)
    • vi <crontab location>
 
Make sure to delete only the malware crontab. Sometimes, users have crontabs for their application and deleting/overwriting it without permission may cause app instability.
 

Recommendations

Premium
Internal
Partner
Rating:
Category:
Remove a Malware / Virus
Solution Id:
000261368
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