Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects scheduled task creation observed through ADAudit Plus. Scheduled tasks are a
long-standing persistence and remote execution mechanism, and seeing them at the
directory audit layer catches creation across the domain rather than host by host.
Onboarding: MANAGE-ENGINE-ADAUDIT-PLUS is ingested via Syslog (KV) (Bloo extractor 830).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=win-audit where sourcename='MANAGE-ENGINE-ADAUDIT-PLUS'
and action='TASK_CREATED'
| groupby user, object, commandline, domain
long-standing persistence and remote execution mechanism, and seeing them at the
directory audit layer catches creation across the domain rather than host by host.
Onboarding: MANAGE-ENGINE-ADAUDIT-PLUS is ingested via Syslog (KV) (Bloo extractor 830).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=win-audit where sourcename='MANAGE-ENGINE-ADAUDIT-PLUS'
and action='TASK_CREATED'
| groupby user, object, commandline, domain
Detects schtasks.exe creating a scheduled task named "Windows Defender Advanced Threat Protection Service" that launches defender.exe (a renamed Sangfor executable abused for DLL sideloading) with SYSTEM privileges at startup. This is the exact persistence mechanism HoneyMyte (Mustang Panda) uses to relaunch the CoolClient backdoor chain from the fake "Microsoft\Windows Defender" directory on every boot.
Detects post-exploitation activity against Ivanti ICS / Connect Secure
appliances on Windows hosts, where a script host (cmd.exe, powershell.exe, w3wp.exe)
drops a web shell (.aspx/.ashx/.asmx) into the appliance WebRoot or reaches into the
CredentialStore / system binaries. These behaviors are the hallmark of attackers
converting an authenticated file-write or SSRF into persistent remote code execution
and credential theft on edge devices.
appliances on Windows hosts, where a script host (cmd.exe, powershell.exe, w3wp.exe)
drops a web shell (.aspx/.ashx/.asmx) into the appliance WebRoot or reaches into the
CredentialStore / system binaries. These behaviors are the hallmark of attackers
converting an authenticated file-write or SSRF into persistent remote code execution
and credential theft on edge devices.
Detects crontab modifications or suspicious command execution spawned by the cron daemon on macOS devices, indicating potential persistence or scheduled task abuse.
Detects schtasks.exe creating a scheduled task named "Windows Defender Advanced Threat Protection Service" that launches defender.exe (a renamed Sangfor executable abused for DLL sideloading) with SYSTEM privileges at startup. This is the exact persistence mechanism HoneyMyte (Mustang Panda) uses to relaunch the CoolClient backdoor chain from the fake "Microsoft\Windows Defender" directory on every boot.
Detects creation of a scheduled task named "Windows Defender Advanced
Threat Protection Service" configured to run at system startup with SYSTEM privileges
and launch an executable named defender.exe. HoneyMyte (Mustang Panda) used this exact
schtasks command to establish boot persistence for the CoolClient backdoor sideloader,
masquerading the task and binary as a legitimate Windows Defender component.
Threat Protection Service" configured to run at system startup with SYSTEM privileges
and launch an executable named defender.exe. HoneyMyte (Mustang Panda) used this exact
schtasks command to establish boot persistence for the CoolClient backdoor sideloader,
masquerading the task and binary as a legitimate Windows Defender component.
Detects creation or modification of cron entries on the BeyondTrust
Remote Support / Privileged Remote Access appliance. After exploiting the pre-auth
vulnerability, attackers establish recurring execution for persistence and C2
beaconing via cron (T1053.003) on the Linux-based appliance.
Follows CISA's urgent patch advisory for BeyondTrust appliances.
Remote Support / Privileged Remote Access appliance. After exploiting the pre-auth
vulnerability, attackers establish recurring execution for persistence and C2
beaconing via cron (T1053.003) on the Linux-based appliance.
Follows CISA's urgent patch advisory for BeyondTrust appliances.
Detects a behavioral chain where PowerShell stages a hidden base64-encoded command and schedules a VBScript task, or PowerShell fetches an upgrade.txt file via web client methods for execution.
Detects persistence mechanisms associated with the MATCHBOIL campaign, identifying instances where a registry run key and a scheduled task pointing to an application data (%LOCALAPPDATA%) path are created by the same process within a short window, or where known specific scheduled task names and run value names are observed.
Detects the creation of scheduled tasks on remote hosts by monitoring for the NetrJobAdd function call (opnum 0) against the ATSVC RPC interface (UUID: 1FF70682-0A51-30E8-076D-740BE8CEE98B). This interface is associated with the legacy Windows AT scheduler, which is frequently abused by offensive security tools like Impacket's atexec for remote command execution and lateral movement.
Detects a behavioral chain where PowerShell stages a hidden base64-encoded command and schedules a VBScript task, or PowerShell fetches an upgrade.txt file via web client methods for execution.
Detects a behavioral chain where PowerShell stages a hidden base64-encoded command and schedules a VBScript task, or PowerShell fetches an upgrade.txt file via web client methods for execution.
The following analytic detects potential malicious activities involving PowerShell's task scheduling cmdlets. It leverages PowerShell Script Block Logging (EventCode 4104) to identify unusual or suspicious use of cmdlets like 'New-ScheduledTask' and 'Set-ScheduledTask'. This activity is significant as attackers often use these cmdlets for persistence and remote execution of malicious code. If confirmed malicious, this could allow attackers to maintain access, deliver additional payloads, or execute ransomware, leading to data theft or other severe impacts. Immediate investigation and mitigation are crucial to prevent further compromise.
Detects a behavioral chain where PowerShell stages a hidden base64-encoded command and schedules a VBScript task, or PowerShell fetches an upgrade.txt file via web client methods for execution.
Detects the creation of persistence mechanisms through both Registry Run keys and Scheduled Tasks within a one-hour window, specifically targeting names indicative of masquerading as legitimate update or helper components.
The following analytic detects the creation or deletion of scheduled tasks via schtasks.exe when invoked with create or delete flags, specifically focusing on those executions where the process includes additional parameters such as /tr, /sc, or /ru. The detection uses Endpoint Detection and Response (EDR) telemetry mapped to the Endpoint data model, and filters out events originating from trusted system paths like C:\Windows\System32 or C:\Program Files. It further narrows results to cases where schtasks.exe is launched by potentially suspicious parent processes such as cmd.exe, wscript.exe, or cscript.exe, and excludes service accounts. This behavior may indicate adversary efforts to gain persistence or evade detection by manipulating scheduled tasks using scripts or command shells. If confirmed malicious, such activity could lead to unauthorized code execution or the removal of monitoring mechanisms on endpoints.
The following analytic detects the use of 'schtasks.exe' to create a scheduled task on a remote system, indicating potential lateral movement or remote code execution. It leverages process data from Endpoint Detection and Response (EDR) agents, focusing on specific command-line arguments and flags. This activity is significant as it may signify an adversary's attempt to persist or execute code remotely. If confirmed malicious, this could allow attackers to maintain access, execute arbitrary commands, or further infiltrate the network, posing a severe security risk.
Detects a behavioral chain where PowerShell stages a hidden base64-encoded command and schedules a VBScript task, or PowerShell fetches an upgrade.txt file via web client methods for execution.
Detects persistence mechanisms associated with the MATCHBOIL campaign, identifying instances where a registry run key and a scheduled task pointing to an application data (%LOCALAPPDATA%) path are created by the same process within a short window, or where known specific scheduled task names and run value names are observed.
Detects persistence attempts using common Windows auto-start registry keys or scheduled tasks where the initiating process is unsigned or has an invalid signature. The rule focuses on binaries executing from suspicious, user-writable directories (e.g., Temp, AppData, Downloads) and specifically targets persistence mechanisms involving the 'SecurityHealthService.exe' filename.
This rule detects potential post-exploitation activity on a NetScaler appliance where a crontab modification occurs within a short window (1 hour) following suspicious syslog entries indicative of oversized-parameter buffer overflow exploitation attempts (CVE-2026-88771/CVE-2026-88772).
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