{ "technique_id": "T1197", "name": "BITS Jobs", "priority": "medium", "status": "draft", "version": "0.1.0", "last_reviewed": "2026-07-23", "generated_by": "SOC Response Atlas by Basyrix", "tactics": [ "Stealth", "Persistence", "Execution" ], "platforms": [ "Windows" ], "summary": "Adversaries may abuse BITS jobs to persistently execute code and perform various background tasks. Windows Background Intelligent Transfer Service (BITS) is a low-bandwidth, asynchronous file transfer mechanism exposed through [Component Object Model](https://attack.mitre.org/techniques/T1559/001) (COM). BITS is commonly used by updaters, messengers, and other applications preferred to operate in the background (using available idle bandwidth) without interrupting other networked applications...", "soc_recommendation": "Investigate BITS Jobs activity in the context of Stealth/Persistence/Execution: confirm scope, affected host/identity, and whether it matches expected administrative behaviour before deciding this is benign.", "d3fend_mappings": [ { "id": "D3-RPA", "name": "Relay Pattern Analysis", "relationship": "detect", "practical_action": "Monitor for Relay Pattern Analysis indicators relevant to this technique.", "tooling": [ "Defender for Endpoint" ] }, { "id": "D3-OTF", "name": "Outbound Traffic Filtering", "relationship": "isolate", "practical_action": "Apply Outbound Traffic Filtering to contain the blast radius once this technique is observed.", "tooling": [ "Sentinel", "Defender for Endpoint" ] } ], "investigation_steps": { "microsoft": [ "Review Defender for Endpoint / Defender XDR alerts and timeline for the affected host or identity.", "Check Sentinel analytics rules and incidents correlated with this technique.", "Review Entra ID sign-in and audit logs if the technique involves an identity or cloud resource." ], "generic": [ "Confirm whether the observed bits jobs activity matches expected administrative or application behaviour.", "Identify the host, account, or resource where the activity occurred and its business criticality.", "Check for related alerts before and after this activity to reconstruct the broader intrusion timeline.", "Real detection reference: \"Bitsadmin Activity\" -- Background Intelligent Transfer Service (BITS) is a way to reliably download files from webservers or SMB servers. This service is commonly used for legitimate purposes, but can also be used as part of a malware downloader. Additionally, bitsadmin can be used to upload files and therefore can be used for data exfiltration. This query will identify use of bitsadmin.exe for either purpose and will identify directionality file transfer directionality." ] }, "evidence_to_collect": [ "Host or resource affected", "Account or identity involved", "Timestamp of the activity", "Related process, file, or network artifact", "Any preceding or follow-on alerts" ], "response_actions": [ { "name": "Contain the affected host or account", "category": "Containment", "risk": "Medium", "automation_safe": false, "approval_required": true, "tool": "Defender for Endpoint / Entra ID", "notes": "Requires approval -- confirm malicious intent before isolating a host or disabling an account." }, { "name": "Collect and preserve evidence", "category": "Investigation", "risk": "Low", "automation_safe": true, "approval_required": false, "tool": "Defender for Endpoint", "notes": "Safe -- read-only evidence collection." } ], "queries": { "kql": [ { "name": "2a1dc4c2-a8d6-4a0e-8539-9b971c851195 — Bitsadmin Activity", "description": "Background Intelligent Transfer Service (BITS) is a way to reliably download files from webservers or SMB servers. This service is commonly used for legitimate purposes, but can also be used as part of a malware downloader. Additionally, bitsadmin can be used to upload files and therefore can be used for data exfiltration. This query will identify use of bitsadmin.exe for either purpose and will identify directionality file transfer directionality. (Source: Microsoft's official Azure-Sentinel Detections (MIT licensed).)", "query": "DeviceProcessEvents\n| where \n (FileName =~ \"bitsadmin.exe\" or column_ifexists('ProcessVersionInfoOriginalFileName','ColumnNotAvailable') =~ 'bitsadmin.exe')\n and ProcessCommandLine has_any ('/Transfer','/AddFile', '/AddFileSet','/AddFileWithRanges')\n| extend \n ParsedCommandLine = parse_command_line(ProcessCommandLine,'windows')\n| extend \n RemoteUrl = tostring(ParsedCommandLine[-2]),\n LocalFile= tostring(ParsedCommandLine[-1]),\n Direction = iff(ProcessCommandLine has \"/Upload\", 'Upload', 'Download')\n| project-reorder \n TimeGenerated,\n DeviceId,\n DeviceName,\n Direction,\n RemoteUrl,\n LocalFile,\n InitiatingProcessFolderPath,\n InitiatingProcessAccountDomain,\n InitiatingProcessAccountName,\n InitiatingProcessSHA256,\n ProcessId,\n ProcessCommandLine\n| extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)\n| extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), \"\")" } ], "spl": [], "esql": [ { "name": "c3b915e0-22f3-4bf7-991d-b643513c722f — Persistence via BITS Job Notify Cmdline", "description": "(EQL) An adversary can use the Background Intelligent Transfer Service (BITS) SetNotifyCmdLine method to execute a program that runs after a job finishes transferring data or after a job enters a specified state in order to persist on a system. (Source: Elastic's official detection-rules repository (Elastic License v2).)", "query": "process where host.os.type == \"windows\" and event.type == \"start\" and\n process.parent.name : \"svchost.exe\" and process.parent.args : \"BITS\" and\n not process.executable :\n (\"?:\\\\Windows\\\\System32\\\\WerFaultSecure.exe\",\n \"?:\\\\Windows\\\\System32\\\\WerFault.exe\",\n \"?:\\\\Windows\\\\System32\\\\wermgr.exe\",\n \"?:\\\\WINDOWS\\\\system32\\\\directxdatabaseupdater.exe\")" }, { "name": "f95972d3-c23b-463b-89a8-796b3f369b49 — Ingress Transfer via Windows BITS", "description": "(EQL) Identifies downloads of executable and archive files via the Windows Background Intelligent Transfer Service (BITS). Adversaries could leverage Windows BITS transfer jobs to download remote payloads. (Source: Elastic's official detection-rules repository (Elastic License v2).)", "query": "file where host.os.type == \"windows\" and event.action == \"rename\" and\n process.name : \"svchost.exe\" and file.Ext.original.name : \"BIT*.tmp\" and \n (file.extension : (\"exe\", \"zip\", \"rar\", \"bat\", \"dll\", \"ps1\", \"vbs\", \"vbe\", \"wsh\", \"wsf\", \"sct\", \"js\", \"jse\", \"hta\", \"pif\", \"scr\", \"cmd\", \"cpl\") or\n file.Ext.header_bytes : \"4d5a*\") and \n \n /* noisy paths, for hunting purposes you can use the same query without the following exclusions */\n not file.path : (\"?:\\\\Program Files\\\\*\", \"?:\\\\Program Files (x86)\\\\*\", \"?:\\\\Windows\\\\*\", \"?:\\\\ProgramData\\\\*\\\\*\") and \n \n /* lot of third party SW use BITS to download executables with a long file name */\n not length(file.name) > 30 and\n not file.path : (\n \"?:\\\\Users\\\\*\\\\AppData\\\\Local\\\\Temp*\\\\wct*.tmp\",\n \"?:\\\\Users\\\\*\\\\AppData\\\\Local\\\\Adobe\\\\ARM\\\\*\\\\RdrServicesUpdater*.exe\",\n \"?:\\\\Users\\\\*\\\\AppData\\\\Local\\\\Adobe\\\\ARM\\\\*\\\\AcroServicesUpdater*.exe\",\n \"?:\\\\Users\\\\*\\\\AppData\\\\Local\\\\Docker Desktop Installer\\\\update-*.exe\"\n )" } ] }, "automation": { "safe": [ "Add recommendation as Sentinel incident comment.", "Run enrichment queries.", "Create ServiceNow SecOps task." ], "approval_required": [ "Contain or disable the affected host/account.", "Any change to production configuration." ] }, "escalation_criteria": [ "BITS Jobs activity observed on a privileged account or critical system.", "Activity follows or precedes other suspicious behaviour in the same investigation.", "Automated triage cannot confidently rule out malicious intent." ], "false_positive_considerations": [ "Legitimate administrative or maintenance activity matching this pattern.", "Approved security testing or red team exercise.", "Known benign software producing similar telemetry." ], "confluence": { "title": "T1197 - BITS Jobs Response Guidance", "labels": [ "mitre", "attack", "d3fend", "secops", "basyrix" ], "sections": [ "summary", "d3fend_mappings", "investigation_steps", "response_actions", "queries", "automation", "escalation_criteria", "false_positive_considerations" ] } }