Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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IDS Classtypes
1
Detects suspicious sub processes of web server processes
The following analytic detects WerMgr.exe (Windows Error Reporting) spawning a child process running at SYSTEM integrity level.
WerMgr.exe normally runs at the integrity level of the reporting user or as a background SYSTEM-owned service that does not launch interactive children.
In the ShieldBreak exploit, WerMgr.exe is manually triggered via the QueueReporting scheduled task and loads an attacker-planted phantom DLL (phoneinfo.dll), which then spawns an elevated shell.
If confirmed malicious, this activity indicates successful local privilege escalation to SYSTEM.
WerMgr.exe normally runs at the integrity level of the reporting user or as a background SYSTEM-owned service that does not launch interactive children.
In the ShieldBreak exploit, WerMgr.exe is manually triggered via the QueueReporting scheduled task and loads an attacker-planted phantom DLL (phoneinfo.dll), which then spawns an elevated shell.
If confirmed malicious, this activity indicates successful local privilege escalation to SYSTEM.
Detects execution of pythonw.exe (windowless Python) with the LAUNCHER_BG_CHILD=1 environment marker present on the command line alongside TWINLOOT-specific staging marker filenames (.agent.lock, .vendor.ok, .vendor.stamp, .reobf.manifest, client_id.txt). TWINLOOT is a modular Python implant that relaunches itself windowlessly via pythonw.exe, extracts a vendor ZIP, and uses these marker files to track staging state during its bootstrap and PyArmor-protected launcher stages, while abusing Microsoft 365/Azure services for C2.
Detects anomalous pythonw.exe execution from non-standard installation paths that exhibits a fan-out pattern of network connections to multiple sensitive internal administrative ports (445, 3389, 5985, 22, 1433, 135, 389). This behavior is characteristic of lateral movement using a SOCKS5 proxy tunnel, such as the activity observed in the TWINLOOT campaign where implants pivot through reverse tunnels to access internal resources.
Detects SYSTEM processes initiated by non-service user accounts from user-writable locations such as AppData, Temp, Public, ProgramData, and Downloads. This behavior may indicate local privilege escalation and is relevant to post-exploitation activity associated with CVE-2026-68820.
This rule detects the execution of 'vlc.exe' or loading of 'libvlc.dll' from common staging or user-writable directories such as Temp, Downloads, or Desktop. This pattern is commonly associated with adversary efforts to execute masquerading or portable malicious payloads, as legitimate VLC installations are typically located in Program Files.
Detects the execution of cmd.exe as a child process of the IIS worker process (w3wp.exe) when the worker process is associated with an Exchange application pool. This pattern is indicative of a webshell exploiting an ASPX component to execute arbitrary commands on an Exchange Server.
This rule detects PowerShell commands that programmatically create a Windows shortcut (.lnk file) targeting a startup folder or mimicking Windows update processes. This behavior is indicative of an adversary attempting to establish persistence by creating a shortcut that executes a malicious script or binary upon user login or system startup, often associated with the QUICSILVER campaign.
Detects a Ray raylet, gcs_server, or dashboard process spawning a calculator process (a near-certain PoC/exploit indicator) or a shell child process carrying suspicious network, encoding, or reverse-shell command-line indicators, consistent with post-exploitation of CVE-2025-62593. Known-legitimate pipeline package-install commands are filtered out to reduce noise from normal Ray job workers.
Detects behavior where the ERAAgent process writes a file to disk and executes that same file shortly after (within 5 minutes). This pattern is consistent with staged payload delivery, decompression, or assembly often observed in malicious activity, specifically referencing SLEEPWALKER malware patterns.
Detects Python processes (python.exe, pythonw.exe, py.exe) executing with high or system integrity levels and interacting with named pipes, a technique often used for inter-process communication, persistence, or process injection.
Detects modifications to Windows LSA and LanmanServer registry keys (RestrictAnonymous, NullSessionPipes) in conjunction with ERAAgent.exe process execution, as well as ERAAgent creating named pipes accessible by anonymous logon, which may indicate configuration tampering to facilitate unauthorized access or credential collection.
Detects modifications to Windows LSA and LanmanServer registry keys (RestrictAnonymous, NullSessionPipes) in conjunction with ERAAgent.exe process execution, as well as ERAAgent creating named pipes accessible by anonymous logon, which may indicate configuration tampering to facilitate unauthorized access or credential collection.
Detects behavior where the ERAAgent process writes a file to disk and executes that same file shortly after (within 5 minutes). This pattern is consistent with staged payload delivery, decompression, or assembly often observed in malicious activity, specifically referencing SLEEPWALKER malware patterns.
Detects Python processes (python.exe, pythonw.exe, py.exe) executing with high or system integrity levels and interacting with named pipes, a technique often used for inter-process communication, persistence, or process injection.
The following analytic detects an unprivileged user invoking the unshare syscall with user namespace flags followed within 120 seconds by a root-owned shell or interpreter spawning under the same parent process, correlating auditd syscall telemetry with Sysmon process creation events to identify the two-step sequence characteristic of user-namespace-based Linux kernel privilege escalation exploits such as DirtyFrag.
System File Execution Location Anomaly
Cortex XDR
Detects Windows system binaries and commonly abused native LOLBins executing from outside their expected system directories, indicating a renamed, relocated, or imposter copy consistent with masquerading, DLL side-loading staging, or process-name spoofing.
Detects a sequence of common discovery commands (ipconfig, whoami, nltest, net group, wmic) executed within a short timeframe (60 seconds) by the same process. This activity is indicative of an adversary performing internal reconnaissance to understand the environment, network, and user privileges.
Detects attempts to impair Windows Defender protection by modifying preferences via PowerShell (Set-MpPreference/Add-MpPreference), stopping the WinDefend service using sc.exe, or altering sensitive Windows Defender registry keys. This rule monitors process execution and registry modification events, excluding known legitimate management tools like Intune and SCCM.
This rule detects PowerShell processes performing file downloads using common commands (such as Invoke-WebRequest, BITS, or Certutil) and saving or targeting files within user-profile specific directories (AppData). This behavior is often indicative of an adversary staging malicious tools or payloads in a writeable user directory.
Detects ClickFix-style initial access where a Run-dialog-spawned interpreter (cmd.exe, powershell.exe, mshta.exe, cscript.exe) executes an encoded or obfuscated command line, consistent with clipboard-paste delivery of C2Looper.
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