Query: rule covering Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish
Matching passage: Sigma rule: Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish. Logsource: windows / dns_query. Rule: title: DNS Query Request By QuickAssist.EXE id: 882e858a-3233-4ba8-855e-2f3d3575803d status: experimental description: 'Detects DNS queries initiated by "QuickAssist.exe" to Microsoft Quick Assist primary endpoint that is used to establish a session. ' references: - https://www.microsoft.com/en-us/security/blog/2024/05/15/threat-actors-misusing-quick-assist-in-social-engineering-attacks-leading-to-ransomware/ - https://www.linkedin.com/posts/kevin-beaumont-security_ive-been-assisting-a-few-orgs-hit-with-successful-activity-7268055739116445701-xxjZ/ - https://x.com/cyb3rops/status/1862406110365245506 - https://learn.microsoft.com/en-us/windows/client-management/client-tools/quick-assist author: Muhammad Faisal (@faisalusuf) date: 2024-12-19 tags: - attack.command-and-control - attack.initial-access - attack.lateral-movement - attack.t1071.001 - attack.t1210 logsource: category: dns_query product: windows detection: selection: Image|endswith: \QuickAssist.exe QueryName|endswith: remoteassistance.support.services.microsoft.com condition: selection falsepositives: - Legitimate use of Quick Assist in the environment. level: low
Near-miss passage: Sigma rule: Detects creation of an ad-hoc Cloudflare Quick Tunnel, which can be used to tunnel local services such as HTTP, RDP, SSH. Logsource: windows / process_creation. Rule: title: Cloudflared Quick Tunnel Execution id: 222129f7-f4dc-4568-b0d2-22440a9639ba related: - id: 7050bba1-1aed-454e-8f73-3f46f09ce56a type: similar - id: 9a019ffc-3580-4c9d-8d87-079f7e8d3fd4 type: similar status: test description: 'Detects creation of an ad-hoc Cloudflare Quick Tunnel, which can be used to tunnel local services such as HTTP, RDP, SSH and SMB. The free TryCloudflare Quick Tunnel will generate a random subdomain on trycloudflare[.]com, following a call to api[.]trycloudflare[.]com. The tool has been observed in use by threat groups including Akira ransomware. ' references: - 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/ author: Sajid Nawaz Khan tags: - attack.command-and-control - attack.t1090.001 date: 2023-12-20 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \cloudflared.exe - \cloudflared-windows-386.exe - \cloudflared-windows-amd64.exe - 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=e1e70fa42059911bc6685fafef957f9a73fc66f214d070