Query: Sigma rule for Detects a potentially suspicious empty user agent strings in proxy log. Could potentially indicate an uncommon request m
Matching passage: Sigma rule: Detects a potentially suspicious empty user agent strings in proxy log. Could potentially indicate an uncommon request m. Logsource: proxy. Rule: title: HTTP Request With Empty User Agent id: 21e44d78-95e7-421b-a464-ffd8395659c4 status: test description: 'Detects a potentially suspicious empty user agent strings in proxy log. Could potentially indicate an uncommon request method. ' references: - https://twitter.com/Carlos_Perez/status/883455096645931008 author: Florian Roth (Nextron Systems) date: 2017-07-08 modified: 2021-11-27 tags: - attack.command-and-control - attack.t1071.001 logsource: category: proxy detection: selection: c-useragent: '' condition: selection falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects the execution of a renamed "cloudflared" binary.. Logsource: windows / process_creation. Rule: title: Renamed Cloudflared.EXE Execution id: e0c69ebd-b54f-4aed-8ae3-e3467843f3f0 status: test description: Detects the execution of a renamed "cloudflared" binary. references: - https://github.com/cloudflare/cloudflared/releases - https://developers.cloudflare.com/cloudflare-one/connections/connect-networks/do-more-with-tunnels/trycloudflare/ - https://github.com/cloudflare/cloudflared - https://www.intrinsec.com/akira_ransomware/ - https://www.guidepointsecurity.com/blog/tunnel-vision-cloudflared-abused-in-the-wild/ tags: - attack.command-and-control - attack.t1090.001 author: Nasreddine Bencherchali (Nextron Systems) date: 2023-12-20 logsource: category: process_creation product: windows detection: selection_cleanup: CommandLine|contains|all: - ' tunnel ' - 'cleanup ' CommandLine|contains: - '-config ' - '-connector-id ' selection_tunnel: CommandLine|contains|all: - ' tunnel ' - ' run ' CommandLine|contains: - '-config ' - '-credentials-contents ' - '-credentials-file ' - '-token ' selection_accountless: CommandLine|contains|all: - -url - tunnel selection_hashes: Hashes|contains: - SHA256=2fb6c04c4f95fb8d158af94c137f90ac820716deaf88d8ebec956254e046cb29 - SHA256=b3d21940a10fdef5e415ad70331ce257c24fe3bcf7722262302e0421791f87e8 - SHA256=1fbd8362b2d2d2e6a5750ae3db69cd1815e6c1d31da48a98b796450971a8e039 - SHA256=0409c9b12f9d0eda86e461ed9bdabeefb00172b26322079681a0bdf48e68dc28 - SHA256=7cfb411d04bac42ef93d1f0c93c0a481e38c6f4612b97ae89d4702595988edc7 - SHA256=5b3c2d846ab162dc6bc595cce3a49de5731afde5d6060be7066d21b013a28373 - SHA256=ce95df7f69664c3df19b76028e115931919a71517b776da7b42d353e2ff4a670 - SHA256=1293525a19cfe3bc8296b62fbfe19f083632ed644a1c18c10b045a1d3030d81a - SHA256=af2b9161cfcb654b16408cd6b098afe9d1fb61a037d18d7090a119d4c0c8e0f0 - SHA256=39ddceb56a15798826a5fc4892fa2b474c444bb4d7a8bf2fa95e41cab10fa7a1 - SHA256=ccd11f2328023a0e7929e845d5b6e7bc783fb4650d65faef3ae090239d4bbce2 - SHA256=b6e5c5d2567ae8c69cc012ebcae30e6c9b5359d64a58d17ba75ec89f8bce71ac - SHA256=f813484ea441404f18caad96f28138e8aaf0cb256163c09c2ab8a3acab87f69f - SHA256=fc4a0802ab9c7409b892ca00636bec61e2acfc911bccfdeb9978b8ab5a2f828d - SHA256=083150724b49604c8765c1ba19541fa260b133be0acb0647fcd936d81f054499 - SHA256=44303d6572956f28a0f2e4b188934fb9874f2584f5c81fa431a463cfbf28083b - SHA256=5d38c46032a58e28ae5f7d174d8761ec3d64d186677f3ec53af5f51afb9bfd2f - SHA256=e1e70fa42059911bc6685fafef957f9a73fc66f214d0704a9b932683a5204032 - SHA256=c01356092a365b84f84f0e66870bd1a05ba3feb53cafd973fa5fea2534b