1type: trigger
2name: sigmahq/proc_creation_win_renamed_cloudflared
3description: |
4  Detects the execution of a renamed "cloudflared" binary.
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.CommandLine contains ' tunnel ' && evt.Parsed.CommandLine contains 'cleanup ' && (evt.Parsed.CommandLine contains '-config ' || evt.Parsed.CommandLine contains '-connector-id ') || evt.Parsed.CommandLine contains ' tunnel ' && evt.Parsed.CommandLine contains ' run ' && (evt.Parsed.CommandLine contains '-config ' || evt.Parsed.CommandLine contains '-credentials-contents ' || evt.Parsed.CommandLine contains '-credentials-file ' || evt.Parsed.CommandLine contains '-token ') || evt.Parsed.CommandLine contains '-url' && evt.Parsed.CommandLine contains 'tunnel' || evt.Parsed.Hashes contains 'SHA256=2fb6c04c4f95fb8d158af94c137f90ac820716deaf88d8ebec956254e046cb29' || evt.Parsed.Hashes contains 'SHA256=b3d21940a10fdef5e415ad70331ce257c24fe3bcf7722262302e0421791f87e8' || evt.Parsed.Hashes contains 'SHA256=1fbd8362b2d2d2e6a5750ae3db69cd1815e6c1d31da48a98b796450971a8e039' || evt.Parsed.Hashes contains 'SHA256=0409c9b12f9d0eda86e461ed9bdabeefb00172b26322079681a0bdf48e68dc28' || evt.Parsed.Hashes contains 'SHA256=7cfb411d04bac42ef93d1f0c93c0a481e38c6f4612b97ae89d4702595988edc7' || evt.Parsed.Hashes contains 'SHA256=5b3c2d846ab162dc6bc595cce3a49de5731afde5d6060be7066d21b013a28373' || evt.Parsed.Hashes contains 'SHA256=ce95df7f69664c3df19b76028e115931919a71517b776da7b42d353e2ff4a670' || evt.Parsed.Hashes contains 'SHA256=1293525a19cfe3bc8296b62fbfe19f083632ed644a1c18c10b045a1d3030d81a' || evt.Parsed.Hashes contains 'SHA256=af2b9161cfcb654b16408cd6b098afe9d1fb61a037d18d7090a119d4c0c8e0f0' || evt.Parsed.Hashes contains 'SHA256=39ddceb56a15798826a5fc4892fa2b474c444bb4d7a8bf2fa95e41cab10fa7a1' || evt.Parsed.Hashes contains 'SHA256=ccd11f2328023a0e7929e845d5b6e7bc783fb4650d65faef3ae090239d4bbce2' || evt.Parsed.Hashes contains 'SHA256=b6e5c5d2567ae8c69cc012ebcae30e6c9b5359d64a58d17ba75ec89f8bce71ac' || evt.Parsed.Hashes contains 'SHA256=f813484ea441404f18caad96f28138e8aaf0cb256163c09c2ab8a3acab87f69f' || evt.Parsed.Hashes contains 'SHA256=fc4a0802ab9c7409b892ca00636bec61e2acfc911bccfdeb9978b8ab5a2f828d' || evt.Parsed.Hashes contains 'SHA256=083150724b49604c8765c1ba19541fa260b133be0acb0647fcd936d81f054499' || evt.Parsed.Hashes contains 'SHA256=44303d6572956f28a0f2e4b188934fb9874f2584f5c81fa431a463cfbf28083b' || evt.Parsed.Hashes contains 'SHA256=5d38c46032a58e28ae5f7d174d8761ec3d64d186677f3ec53af5f51afb9bfd2f' || evt.Parsed.Hashes contains 'SHA256=e1e70fa42059911bc6685fafef957f9a73fc66f214d0704a9b932683a5204032' || evt.Parsed.Hashes contains 'SHA256=c01356092a365b84f84f0e66870bd1a05ba3feb53cafd973fa5fea2534bee234' || evt.Parsed.Hashes contains 'SHA256=b3f9c06151e30ee43d39e788a79cd918a314f24e04fe87f3de8272a2057b624f' || evt.Parsed.Hashes contains 'SHA256=cd81b2792f0739f473c31c9cb7cf2313154bfa28b839975802b90e8790bb5058' || evt.Parsed.Hashes contains 'SHA256=9ec7e6c8e1bfd883663d8d9d62c9e4f9ae373b731407181e32491b27a7218a2c' || evt.Parsed.Hashes contains 'SHA256=c2cfd23fdc6c0e1b1ffa0e545cbe556f18d11b362b4a89ba0713f6ab01c4827f' || evt.Parsed.Hashes contains 'SHA256=53f8adbd76c0eb16f5e43cadde422474d8a06f9c8f959389c1930042ad8beaa5' || evt.Parsed.Hashes contains 'SHA256=648c8d2f8001c113d2986dd00b7bbd181593d462bef73522cee212c4f71f95b3' || evt.Parsed.Hashes contains 'SHA256=ae047e2095e46c3f9c518b2be67ec753f4f0aad23b261a361fcb6144dcdb63b4' || evt.Parsed.Hashes contains 'SHA256=3153d2baa462978dd22ab33d1c2274ecc88c200225d6a3327f98d5b752d08f5c' || evt.Parsed.Hashes contains 'SHA256=f49cde976e628012c9db73e1c8d76081944ecf2297cdafeb78bb13290da274c4' || evt.Parsed.Hashes contains 'SHA256=d2513e58bb03ccc83affde685c6ef987924c37ce6707d8e9857e2524b0d7e90f' || evt.Parsed.Hashes contains 'SHA256=bb67c7623ba92fe64ffd9816b8d5b3b1ea3013960a30bd4cf6e295b3eb5b1bad' || evt.Parsed.Hashes contains 'SHA256=b34b3c3a91e3165d1481f0b3ec23eab93a1cfba94345a6cbfe5b18ddbd48eac7' || evt.Parsed.Hashes contains 'SHA256=f7848034e010d55f15e474ca998f96391e320ff29b00cfcc4c5e536529703e75' || evt.Parsed.Hashes contains 'SHA256=b6fc9493778cbe3bfc062d73f5cc604bc0ff058bc5e5dc6aac87f3a4008b54b6' || evt.Parsed.Hashes contains 'SHA256=f5c5e962577e2293c4ad10603816dce7cc273585969615fbf4e4bfa9eaff1688' || evt.Parsed.Hashes contains 'SHA256=d14c52d9220b606f428a8fe9f7c108b0d6f14cf71e7384749e98e6a95962e68f' || evt.Parsed.Hashes contains 'SHA256=d3a0e1a79158f3985cd49607ebe0cdfcc49cb9af96b8f43aefd0cdfe2f22e663' || evt.Parsed.Hashes contains 'SHA256=2fbbfc8299537ff80cadf9d0e27c223fe0ccb9052bf9d8763ad717bbfa521c77' || evt.Parsed.Hashes contains 'SHA256=19074674c6fbdaa573b3081745e5e26144fdf7a086d14e0e220d1814f1f13078') && not (evt.Parsed.Image endsWith '\\cloudflared.exe' || evt.Parsed.Image endsWith '\\cloudflared-windows-386.exe' || evt.Parsed.Image endsWith '\\cloudflared-windows-amd64.exe'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1090.001
15
16  label: "Renamed Cloudflared.EXE Execution"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24