Multiple Rule Updates & New Rules

[swachchhanda000]

Summary of the Pull Request

This PR updates multiple rules that are related to living of the land binaries and can be abused to perform download actions.

Changelog

new: Arbitrary File Download Via IMEWDBLD.EXE
new: Arbitrary File Download Via MSEDGE_PROXY.EXE
new: Arbitrary File Download Via Squirrel.EXE - This is a split rule from "45239e6a-b035-4aaf-b339-8ad379fcb67e"
new: Msxsl.EXE Execution
new: Potential File Download Via MS-AppInstaller Protocol Handler
new: Remote XSL Execution Via Msxsl.EXE
update: AppX Package Installation Attempts Via AppInstaller.EXE - Update description and title
update: Arbitrary File Download Via MSOHTMED.EXE - Update title
update: Arbitrary File Download Via PresentationHost.EXE - Update title
update: File Download And Execution Via IEExec.EXE - Update title and description
update: File Download From Browser Process Via Inline URL - Enhance accuracy by using the "endswith" modifier and incrasing coverage by adding new extensions to the list
update: File Download Using ProtocolHandler.exe - Update logic by removing unecessary the "selection_cli_1"
update: File Download Via InstallUtil.EXE - Update title and description
update: File Download Via Windows Defender MpCmpRun.EXE - Update metadata information and add additional fields to the image selection
update: Network Connection Initiated By IMEWDBLD.EXE - Update description and title
update: Potentially Suspicious Electron Application CommandLine - Add "msedge_proxy.exe" to list of processes
update: Process Proxy Execution Via Squirrel.EXE - Moved the logic that covers the "download" aspect into a new rule "1e75c1cc-c5d4-42aa-ac3d-91b0b68b3b4c"
update: Suspicious Calculator Usage - Update filter to remove the "C:" prefix, which increase coverage of other partitions
update: Uncommon Child Process Of Appvlp.EXE - Update description, title and enahnce false positives filters
update: XBAP Execution From Uncommon Locations Via PresentationHost.EXE - Update title and description
update: XSL Script Execution Via WMIC.EXE - Removed the selection that covers "Msxsl" and moved to a seperate rules "9e50a8b3-dd05-4eb8-9153-bdb6b79d50b0"

Example Log Event

N/A

Fixed Issues

N/A

SigmaHQ Rule Creation Conventions

• If your PR adds new rules, please consider following and applying these conventions

[nasbench]

Thanks for the PR @swachchhanda000

Just FYI 80% of the processes in your original rule were covered. I only left the ones that were not and moved them to separate rules. (You can find them with your name as author). And I did some house cleanup :)

Cheers.