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Unlock with Pro - from £29/user/moDetect Mass Stop/Disable of AV, EDR, and Backup Agent Services Preceding Destructive Activity in Sumo Logic CSE
Before deploying an encryptor or wiper, ransomware operators and their affiliates routinely disable or kill every security and backup agent on a host in a tight burst, so that neither the endpoint protection stack nor the backup client can interfere with or later help recover from the destructive payload. This is executed with built-in, signed Windows tooling rather than custom malware: `sc.exe stop <svc>` / `sc.exe config <svc> start= disabled` (stop and permanently disable a service), `net stop <svc>` (the legacy equivalent, still widely scripted), PowerShell `Stop-Service`/`Set-Service -StartupType Disabled` (used when execution is via a PowerShell-based loader or C2 implant), and `taskkill /F /IM <process>.exe` (used to kill the service host process directly when the service control manager itself is protected or tamper-resistant). The distinguishing signal is not any single command — administrators routinely stop one service for maintenance — but the pattern of several distinct AV/EDR and backup-agent service names being targeted by one host/account within a short window, which has essentially no legitimate single-actor explanation outside of a coordinated uninstall or migration. Named targets recur across incident reports: Windows Defender (WinDefend, MsMpSvc, Sense/MDE, SecurityHealthService, WdNisSvc), CrowdStrike Falcon (CSFalconService, CSAgent), SentinelOne (SentinelAgent, SentinelServiceHost), VMware/Carbon Black (CbDefense, CbEvtMgr), Sophos (SAVService, SAVAdminService), Symantec/Broadcom (SepMasterService, ccSvcHst), McAfee/Trellix (McShield, mfemms, mfevtp), Trend Micro (TmCCSF, ntrtscan), BlackBerry Cylance (CylanceSvc), Malwarebytes (MBAMService), and backup agents including Veeam (VeeamBackupSvc, VeeamTransportSvc), Acronis (AcronisAgent), Veritas Backup Exec (BackupExecJobEngine, BackupExecAgentAccelerator), and the native Windows VSS/backup engine (wbengine, SDRSVC). Detection keys on the combination of a stop/disable/kill command syntax against this named-target list, clustered per host within a short window, rather than on any individual binary or service name in isolation.
MITRE ATT&CK
- Tactic
- Impact
Sumo Detection Query
_sourceCategory="windows/sysmon" EventID=1
(
(Image="*sc.exe" and (CommandLine matches "*stop*" or CommandLine matches "*config*"))
or (Image="*net.exe" and CommandLine matches "*stop*")
or (Image="*taskkill.exe" and CommandLine matches "*/f*")
or (Image="*powershell.exe" and (CommandLine matches "*Stop-Service*" or CommandLine matches "*Set-Service*"))
)
and (
CommandLine matches "*WinDefend*" or CommandLine matches "*MsMpSvc*" or CommandLine matches "*Sense*"
or CommandLine matches "*CSFalconService*" or CommandLine matches "*SentinelAgent*" or CommandLine matches "*CbDefense*"
or CommandLine matches "*SAVService*" or CommandLine matches "*SepMasterService*" or CommandLine matches "*McShield*"
or CommandLine matches "*TmCCSF*" or CommandLine matches "*CylanceSvc*" or CommandLine matches "*VeeamBackupSvc*"
or CommandLine matches "*AcronisAgent*" or CommandLine matches "*BackupExec*" or CommandLine matches "*wbengine*" or CommandLine matches "*SDRSVC*"
)
| eval StopMethod = if(Image matches "*sc.exe*", "sc_stop_or_config",
if(Image matches "*net.exe*", "net_stop",
if(Image matches "*taskkill*", "taskkill_force", "posh_stop_or_set_service")))
| timeslice 15m
| stats dc(CommandLine) as DistinctTargets, values(StopMethod) as Methods, count as Events by Computer, User, _timeslice
| where DistinctTargets >= 1
| sort by DistinctTargets descSumo Logic Cloud SIEM search over Sysmon Event ID 1 for the security-tool/backup-agent mass-stop command set. Groups matches into 15-minute timeslices per host/user, surfacing hosts where three or more distinct targeted services are stopped/disabled/killed together as the highest-priority cluster.
Data Sources
Required Tables
False Positives & Tuning
- IT administrators or automation platforms performing legitimate bulk patch/maintenance cycles
- Planned migration or uninstall of one security product in favor of another
- Backup software upgrade windows stopping the vendor's own agent services
- Golden-image pipelines stripping pre-installed AV/EDR agents from a template
Other platforms for THREAT-Impact-SecurityToolMassServiceStop
Testing Methodology
Validate this detection against 4 adversary techniques from Atomic Red Team. Each test below lists the behaviour to exercise and the telemetry you should expect to see. Executable commands and cleanup steps are available with Pro.
- Test 1Stop and Disable Windows Defender via sc.exe
Expected signal: Sysmon/DeviceProcessEvents/Security 4688 process creation: FileName=sc.exe, two events with CommandLine containing 'stop WinDefend' and 'config WinDefend start= disabled' respectively.
- Test 2Mass Stop of AV/EDR and Backup Services via net stop
Expected signal: Sysmon/DeviceProcessEvents/Security 4688 process creation: FileName=net.exe, three events with CommandLine containing 'stop SAVService', 'stop SepMasterService', and 'stop VeeamTransportSvc' respectively, within the same 15-minute window on one host.
- Test 3Kill CrowdStrike Falcon Service Host via taskkill
Expected signal: Sysmon/DeviceProcessEvents/Security 4688 process creation: FileName=taskkill.exe, CommandLine contains '/F /IM CSFalconService.exe'.
- Test 4Disable Security Services via PowerShell Stop-Service/Set-Service
Expected signal: Sysmon/DeviceProcessEvents/Security 4688 process creation: FileName=powershell.exe, two events with CommandLine containing 'Stop-Service' and 'Set-Service' respectively, ParentImage referencing powershell.exe/pwsh.exe.
References (7)
- https://attack.mitre.org/techniques/T1489/
- https://attack.mitre.org/tactics/TA0040/
- https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/sc-config
- https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/net-stop
- https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.management/stop-service
- https://www.cisa.gov/news-events/cybersecurity-advisories
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1489/T1489.md
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Related Detections
Tactic Hub
Detection Variants (2)
Different telemetry and tradecraft for the same technique — pick the one that matches the data you collect.