macOS High Sierra 10.13.3 (17D47) - any specific reason you did not upgrade to 10.13.6? When this is cleaned up, I recommend doing so, in order to get the latest security for this operating system.
Antivirus software: Apple and CleanMyMac - Malware
File sharing: Enabled - only necessary if you are sharing with other Mac users in your vicinity. Apple menu -> System Preferences -> Sharing
Printer sharing: Enabled - only necessary if your printer is not WiFi capable and can't share with other computers over WiFi.
Screen sharing: Enabled - only necessary if you want people to view the content of your Mac from another Mac.
Unsigned Files:
Launchd: /Library/LaunchAgents/com.oracle.java.Java-Updater.plist
Executable: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Resources/Java Updater.app/Contents/MacOS/Java - No reason to be unsigned, you'll want Java from http://www.java.com/
Launchd: /Library/LaunchDaemons/com.citrix.ctxusbd.plist
Executable: /Library/Application Support/Citrix Receiver/ctxusbd
Details: Exact match found in the whitelist - probably OK - is used to run programs on remote sites.
Launchd: /Library/LaunchAgents/com.citrix.AuthManager_Mac.plist
Executable: /usr/local/libexec/AuthManager_Mac.app/Contents/MacOS/AuthManager_Mac
Details: Exact match found in the whitelist - probably OK
Launchd: /Library/LaunchAgents/com.citrix.ReceiverHelper.plist
Executable: /usr/local/libexec/ReceiverHelper.app/Contents/MacOS/ReceiverHelper
Details: Exact match found in the whitelist - probably OK
Running app: /Applications/Pulse Secure.app/Contents/MacOS/Pulse Secure
Safari Extension: Webex Meetings - only necessary if you are doing meetings with other people
Plugin: /Library/Internet Plug-Ins/o1dbrowserplugin.plugin - malware, note the funny name with a '1' instead of 'l'
Plugin: /Library/Internet Plug-Ins/ContentUploaderPlugin.plugin - probably malware for file sharing site.
Apps: 17
32-bit Applications:
201 32-bit apps
Kernel Extensions:
/Applications/Pulse Secure.app
PulseSecureFirewall.kext (9.1.3 - SDK 10.12)
/Applications/Splashtop Streamer.app
Soundflower.kext (1.6.6 - SDK 10.6)
SRXDisplayCard.kext (1.6 - SDK 10.7)
SRXFrameBufferConnector.kext (1.6 - SDK 10.7)
/Library/Application Support/Citrix Receiver
CitrixGUSB.kext (12.3.0 - SDK 10.9)
/System/Library/Extensions
Seagate Storage Driver.kext (5.0.1) - Seagate's software has a mixed history. Better to backup with Time Machine or Carbon Copy Cloner.
/System/Library/Extensions/Seagate Storage Driver.kext/Contents/PlugIns
SeagateLeafPowSecDriver_10_4.kext (5.0.1)
SeagateLeafPowSecDriver_10_5.kext (5.0.1)
SeagateDriveIcons.kext (5.0.1)
System Launch Agents:
[Not Loaded] 16 Apple tasks
[Loaded] 162 Apple tasks
[Running] 113 Apple tasks
System Launch Daemons:
[Not Loaded] 33 Apple tasks
[Loaded] 182 Apple tasks
[Running] 117 Apple tasks
[Other] One Apple task
Three applications providing the same capability. No reason to have all three:
[Running] com.Affinegy.InstaLANa.plist (? e5c3a4f4 - installed 2010-07-28)
[Loaded] com.citrix.AuthManager_Mac.plist (? 1ce99fae - installed 2016-09-15)
[Loaded] com.citrix.ReceiverHelper.plist (? bbfad3f1 - installed 2016-09-15)
[Running] com.citrix.ServiceRecords.plist (? 8e6543d - installed 2016-09-15)
[Not Loaded] com.splashtop.streamer-for-root.plist (? b312a32c - installed 2013-09-16)
[Loaded] com.splashtop.streamer-for-user.plist (? dc46c094 - installed 2013-09-16)
[Not Loaded] com.teamviewer.teamviewer.plist (TeamViewer GmbH - installed 2020-02-05)
[Not Loaded] com.teamviewer.teamviewer_desktop.plist (TeamViewer GmbH - installed 2020-02-05)
User Launch Agents:
[Loaded] com.macpaw.CleanMyMac3.Scheduler.plist (MacPaw Inc. - installed 2016-09-28) - Malware
That's just to name a few things.