Feature/rm submodule (#312)

* rm: submodule

* Add: rules

* Fix: hayabusa-rules to c9c10a

rules/sigma/process_creation/process_mailboxexport_share.yml

@@ -0,0 +1,37 @@
+
+title: Suspicious PowerShell Mailbox Export to Share
+ruletype: Sigma
+author: Florian Roth
+date: 2021/08/07
+description: Detects a PowerShell New-MailboxExportRequest that exports a mailbox
+  to a local share, as used in ProxyShell exploitations
+detection:
+  SELECTION_1:
+    EventID: 1
+  SELECTION_2:
+    CommandLine: '*New-MailboxExport*'
+  SELECTION_3:
+    CommandLine: '* -Mailbox *'
+  SELECTION_4:
+    CommandLine: '* -FilePath \\127.0.0.1\C$*'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4)
+falsepositives:
+- unknown
+fields:
+- CommandLine
+- ParentCommandLine
+id: 889719ef-dd62-43df-86c3-768fb08dc7c0
+level: critical
+logsource:
+  category: process_creation
+  product: windows
+references:
+- https://youtu.be/5mqid-7zp8k?t=2481
+- https://blog.orange.tw/2021/08/proxylogon-a-new-attack-surface-on-ms-exchange-part-1.html
+- https://peterjson.medium.com/reproducing-the-proxyshell-pwn2own-exploit-49743a4ea9a1
+status: experimental
+tags:
+- attack.persistence
+- attack.t1505.003
+- attack.resource_development
+- attack.t1584.006