{"id":8949,"date":"2025-06-10T02:24:49","date_gmt":"2025-06-10T02:24:49","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=8949"},"modified":"2025-06-10T02:24:50","modified_gmt":"2025-06-10T02:24:50","slug":"excessive-number-of-failed-connections-from-127-0-0-1","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/excessive-number-of-failed-connections-from-127-0-0-1","title":{"rendered":"Excessive number of failed connections from 127.0.0.1"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ran the following Advanced Hunting KQL<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">_Im_NetworkSession(eventresult='Failure')\n| take 100<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Was due to Labtech upgrades<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcIpAddr<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">127.0.0.1<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcPortNumber<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">59615<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DstIpAddr<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">127.0.0.1<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DstPortNumber<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">42013<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcDvcId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">7<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcUsername<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">nt authority\\system<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NetworkProtocol<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TCP<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventOriginalResultDetails<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ConnectionFailed<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ASimMatchingIpAddr<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211;<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcDvcIdType<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MDEid<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcUsernameType<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Windows<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventCount<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">7<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventSchema<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NetworkSession<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventSchemaVersion<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">0.2.3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventVendor<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Microsoft<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventProduct<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M365 Defender for Endpoint<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">EventType<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NetworkSession<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">NetworkDirection<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Outbound<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Src<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">127.0.0.1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dst<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">127.0.0.1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">7<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IpAddr<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">127.0.0.1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DvcId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcAppName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ltsvc.exe<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Type<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DeviceNetworkEvents<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcAppType<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Process<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DvcIdType<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MDEid<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DvcIpAddr<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">127.0.0.1<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">User<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">nt authority\\system<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ASimMatchingHostname<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8211;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcUserIdType<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SID<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TenantId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessAccountDomain<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">nt authority<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessAccountName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">system<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessFolderPath<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">c:\\windows\\ltsvc\\ltsvc.exe<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">19272<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessMD5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ParentProcessName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">services.exe<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessParentId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1124<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessSHA1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>?<\/em><em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessSHA256<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>?<\/em><em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessFileSize<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1623832<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessVersionInfoCompanyName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LabTech Software<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessVersionInfoProductName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LabTech MSP<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessVersionInfoProductVersion<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3.0<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessVersionInfoInternalFileName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LTSVC.exe<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessVersionInfoOriginalFileName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LTSVC.exe<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessVersionInfoFileDescription<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LabTech Service<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessSessionId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">0<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">IsInitiatingProcessRemoteSession<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">false<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">InitiatingProcessUniqueId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ParentProcessId<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Process<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ltsvc.exe<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcProcessCommandLine<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">LTSVC.exe -sLTService -nLabTech<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcProcessName<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">ltsvc.exe<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcProcessIntegrityLevel<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">System<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcProcessTokenElevation<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">TokenElevationTypeDefault<em>?<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SrcProcessCreationTime<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ran the following Advanced Hunting KQL Was due to Labtech upgrades SrcIpAddr 127.0.0.1? SrcPortNumber 59615? DstIpAddr 127.0.0.1? DstPortNumber 42013? SrcDvcId 7 SrcUsername nt authority\\system NetworkProtocol TCP? EventOriginalResultDetails [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-8949","post","type-post","status-publish","format-standard","hentry","category-research"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Ran the following Advanced Hunting KQL _Im_NetworkSession(eventresult=&#039;Failure&#039;) | take 100 Was due to Labtech upgrades SrcIpAddr 127.0.0.1? SrcPortNumber 59615? DstIpAddr 127.0.0.1? DstPortNumber 42013? SrcDvcId 7 SrcUsername nt authority\\system NetworkProtocol TCP? EventOriginalResultDetails ConnectionFailed ASimMatchingIpAddr -? SrcDvcIdType MDEid SrcUsernameType Windows EventCount 1 7 EventSchema NetworkSession EventSchemaVersion 0.2.3 EventVendor Microsoft EventProduct M365 Defender for Endpoint EventType NetworkSession NetworkDirection\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"paris\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/pariswells.com\/blog\/research\/excessive-number-of-failed-connections-from-127-0-0-1\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Welcome to Pariswells.com |\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Excessive number of failed connections from 127.0.0.1 | Welcome to Pariswells.com\" \/>\n\t\t<meta property=\"og:description\" content=\"Ran the following Advanced Hunting KQL _Im_NetworkSession(eventresult=&#039;Failure&#039;) | take 100 Was due to Labtech upgrades SrcIpAddr 127.0.0.1? SrcPortNumber 59615? DstIpAddr 127.0.0.1? DstPortNumber 42013? SrcDvcId 7 SrcUsername nt authority\\system NetworkProtocol TCP? EventOriginalResultDetails ConnectionFailed ASimMatchingIpAddr -? 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SrcDvcId 7 SrcUsername nt authority\\system NetworkProtocol TCP? EventOriginalResultDetails ConnectionFailed ASimMatchingIpAddr -? 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