Fix syntax errors in yaml parsing

[mgmacias95]

Hello,

This PR fixes some errors when trying to parse the rules with a yaml parser:

• get2downloader.yml: cannot unmarshal !!str -https:... into []string
• filedroppedbyeqnedt32exe.yml: line 19: found character that cannot start any token
• koadicpostexploitationrootkit.yml: unknown anchor 'chcp' referenced
• powershelldownloadingfilefromurlshortenersite.yml: line 30: did not find expected alphabetic or numeric character
• powershelllaunchregsvr32.yml: line 19: did not find expected alphabetic or numeric character
• powershellsleepandlaunchexecutable.yml: yaml: unknown anchor 'powershell' referenced
• remcos.yml: line 19: found character that cannot start any token
• shedulehiddenpowershellscript.yml: line 19: did not find expected alphabetic or numeric character
• wscriptdownloadfileintotemplocationfromwordpresssite.yml: yaml: unknown anchor 'cmd' referenced

I hope it helps :)

Regards,
Marta

[cccs-kevin]

@yogesh-joe can you please review this? The @CybercentreCanada would like to use these Sigma rules but as mentioned above, they do not compile.