ルール更新 (#224)

rules/sigma/process_creation/win_hwp_exploits.yml

@@ -0,0 +1,38 @@
+
+title: Suspicious HWP Sub Processes
+author: Florian Roth
+date: 2019/10/24
+description: Detects suspicious Hangul Word Processor (Hanword) sub processes that
+  could indicate an exploitation
+detection:
+  SELECTION_1:
+    EventID: 1
+  SELECTION_2:
+    ParentImage: '*\Hwp.exe'
+  SELECTION_3:
+    Image: '*\gbb.exe'
+  condition: (SELECTION_1 and SELECTION_2 and SELECTION_3)
+falsepositives:
+- Unknown
+id: 023394c4-29d5-46ab-92b8-6a534c6f447b
+level: high
+logsource:
+  category: process_creation
+  product: windows
+modified: 2020/09/01
+references:
+- https://www.securitynewspaper.com/2016/11/23/technical-teardown-exploit-malware-hwp-files/
+- https://www.hybrid-analysis.com/search?query=context:74940dcc5b38f9f9b1a0fea760d344735d7d91b610e6d5bd34533dd0153402c5&from_sample=5db135000388385a7644131f&block_redirect=1
+- https://twitter.com/cyberwar_15/status/1187287262054076416
+- https://blog.alyac.co.kr/1901
+- https://en.wikipedia.org/wiki/Hangul_(word_processor)
+status: experimental
+tags:
+- attack.initial_access
+- attack.t1566.001
+- attack.t1193
+- attack.execution
+- attack.t1203
+- attack.t1059.003
+- attack.t1059
+- attack.g0032