Create quasar-rat-c2.yaml

ssl/c2/quasar-rat-c2.yaml

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+id: quasar-rat-c2
+
+info:
+  name: Detect SSL Certificate Quasar RAT C2
+  author: johnk3r
+  severity: info
+  description: |
+    Quasar RAT is a malware family written in .NET which is used by a variety of attackers. The malware is fully functional and open source, and is often packed to make analysis of the source more difficult.
+  reference: |
+    https://malpedia.caad.fkie.fraunhofer.de/details/win.quasar_rat
+  metadata:
+    max-request: 1
+    verified: "true"
+    shodan-query: ssl.cert.subject.cn:"Quasar Server CA"
+  tags: c2,ir,osint,malware
+
+ssl:
+  - address: "{{Host}}:{{Port}}"
+
+    matchers:
+      - type: word
+        part: issuer_cn
+        words:
+          - "Quasar Server CA"
+
+    extractors:
+      - type: json
+        json:
+          - " .issuer_cn"