Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects PowerShell execution performing port checks across multiple internal hosts using Test-NetConnection in a looping construct with output redirected to a log file, indicative of post-compromise reconnaissance (such as LONEPAGE scanning).
Detects PowerShell execution performing port checks across multiple internal hosts using Test-NetConnection in a looping construct with output redirected to a log file, indicative of post-compromise reconnaissance (such as LONEPAGE scanning).
Detects the execution of MATCHBOIL malware variants (PlannerAssistantManager.exe or RegularExpressionExplorer.exe) using specific command-line arguments (-auto, -plans, -renew) which trigger C&C logic.
Detects potentially malicious use of rundll32.exe by monitoring for execution from suspicious directory paths (e.g., Temp, AppData, Downloads), execution with arguments missing common legitimate entry points, unexpected network connections originating from rundll32.exe, or rundll32.exe spawning child processes (excluding known safe binaries like conhost.exe or werfault.exe).
Detects evidence of exploitation and post-exploitation activity related to CVE-2026-59310, an unauthenticated RCE vulnerability in the VMware vCenter Syslog Server. The rule monitors for suspicious child processes spawned by vmsyslogcollector, directory traversal patterns in command lines, and persistence mechanisms involving SSH authorized_keys modification, cron job creation, or systemd unit deployment on the VCSA shell.
Detects a sequence of events where a user clicks a shared link to an AI chatbot conversation followed closely (within 15 minutes) by the execution of potentially malicious processes (mshta, powershell, cmd) that include suspicious command-line patterns indicative of ClickFix-style social engineering.
This rule detects potential command injection attacks targeting the Zimbra 'swatchdog' service, specifically involving the abuse of SNMP trap notifications (CVE-2026-73570). The attack works by injecting malicious shell metacharacters into the 'zimbra-MIB::zmServiceName' argument, which is processed by a Perl-invoked 'swatchdog' script. The rule monitors process execution events for shell commands spawned by the swatchdog utility that contain suspicious shell operators and the targeted MIB parameter.
Detects awk-based shell command construction on ESX BusyBox that interleaves
an esxcli/vim-cmd command string with invisible Unicode code points (zero-width space,
zero-width non-joiner/joiner, word joiner, Mongolian vowel separator, left/right-to-left
marks, or Plane-16 private-use characters generated via sprintf hex escapes), strips them
with gsub(), and passes the result to system(). CrowdStrike documented this as one of 21
validated ESX obfuscation techniques that leaves only the invisible-character-laden string
in shell logs while the executed command is fully hidden from cleartext review.
an esxcli/vim-cmd command string with invisible Unicode code points (zero-width space,
zero-width non-joiner/joiner, word joiner, Mongolian vowel separator, left/right-to-left
marks, or Plane-16 private-use characters generated via sprintf hex escapes), strips them
with gsub(), and passes the result to system(). CrowdStrike documented this as one of 21
validated ESX obfuscation techniques that leaves only the invisible-character-laden string
in shell logs while the executed command is fully hidden from cleartext review.
Detects a system shell/interpreter copied or moved into a writable or non-standard path -
the precursor to the 'copy /bin/bash, set SUID, run bash -p' misconfiguration abuse and a
common staging step in the page-cache PoCs. Enriched with source/destination decode, an
inline-SUID-intent flag (chmod +s / chmod 4755 / install -m / setcap in the same command),
masquerade flags (renamed, hidden dotfile, system-lookalike name), a weighted RiskScore /
TriagePriority and DeviceInfo context. Pairs with OS-DET-LNX-006 and correlation
OS-DET-LNX-007. Detection logic adapted from Elastic Security Labs.
the precursor to the 'copy /bin/bash, set SUID, run bash -p' misconfiguration abuse and a
common staging step in the page-cache PoCs. Enriched with source/destination decode, an
inline-SUID-intent flag (chmod +s / chmod 4755 / install -m / setcap in the same command),
masquerade flags (renamed, hidden dotfile, system-lookalike name), a weighted RiskScore /
TriagePriority and DeviceInfo context. Pairs with OS-DET-LNX-006 and correlation
OS-DET-LNX-007. Detection logic adapted from Elastic Security Labs.
Detects the execution of '1.bat' when it invokes administrative or sensitive utilities such as schtasks.exe, reg.exe, or specific executables like LockScreenContentServer.exe. This activity is indicative of a persistence mechanism being established or the initiation of a DLL side-loading chain.
Detects a suspicious Microsoft Teams MSI installer (msiexec.exe) spawning a PowerShell child process or referencing a known dead-drop resolver domain. This behavior is indicative of a trojanized installer used as an initial access vector to execute malicious payloads.
Detects PowerShell command execution that combines typical Active Directory or system reconnaissance commands with potential persistence mechanisms, which is a common indicator of post-exploitation activity.
Detects instances where a suspicious PowerShell, mshta, or pwsh command, typically involving download or obfuscation patterns, is launched as a child process of Windows Explorer within two minutes of a modification to the Explorer RunMRU registry key. This behavior is indicative of an adversary attempting to achieve execution, often following user interaction or persistence triggers.
This analytic detects the use of `curl.exe` with insecure flags such as `-k`, `--insecure`, `--proxy-insecure`, or `--doh-insecure`
which disable TLS certificate validation.
It leverages Cisco Network Visibility Module (NVM) flow data and process arguments
to identify outbound connections initiated by curl where TLS checks were explicitly disabled.
This behavior may indicate an attempt to bypass certificate validation to connect to potentially untrusted or malicious endpoints,
a common tactic in red team operations, malware staging, or data exfiltration over HTTPS.
which disable TLS certificate validation.
It leverages Cisco Network Visibility Module (NVM) flow data and process arguments
to identify outbound connections initiated by curl where TLS checks were explicitly disabled.
This behavior may indicate an attempt to bypass certificate validation to connect to potentially untrusted or malicious endpoints,
a common tactic in red team operations, malware staging, or data exfiltration over HTTPS.
Detects multiple attempts to disable, stop, or tamper with security products, backup solutions, or AV/EDR agents. The rule monitors for malicious use of sc.exe, net.exe, taskkill.exe, and PowerShell cmdlets targeting security software, as well as registry modifications to disable security protections. This behavior is commonly observed in post-compromise stages of ransomware attacks for defense evasion.
Detects the WMI provider host (wmiprvse.exe) spawning common living-off-the-land binaries often associated with command execution or lateral movement.
Detects the ClickFix behavioral pattern where Windows Explorer (typically triggered via the Run dialog) directly spawns PowerShell.exe. This activity is indicative of a user being socially engineered into copying and executing a malicious command from a fake CAPTCHA lure directly into the shell.
Detects evidence of the SLAPSHOT backdoor on Citrix NetScaler appliances by identifying specific ephemeral IPC files (/tmp/.uxdport and /tmp/.uxdlock) or the associated python-based launcher process that uses base64-encoded arguments to initialize the proxy daemon.
Detects the use of native Windows utilities (vssadmin, wmic, wbadmin, bcdedit, and PowerShell) to delete Volume Shadow Copies, backup catalogs, or disable system recovery features. This is a common tactic used by ransomware and destructive actors to prevent system recovery.
Detects modifications to Azure DevOps pipelines or service connections that include indicators of outbound tunneling or reverse proxy tools (e.g., ngrok, socat, chisel, or SSH reverse tunnels). This behavior is characteristic of an attacker attempting to establish a command-and-control channel or bypass firewall restrictions by tunneling traffic out of the CI/CD pipeline execution environment.
This rule detects potential command injection attacks targeting the Zimbra 'swatchdog' service, specifically involving the abuse of SNMP trap notifications (CVE-2026-73570). The attack works by injecting malicious shell metacharacters into the 'zimbra-MIB::zmServiceName' argument, which is processed by a Perl-invoked 'swatchdog' script. The rule monitors process execution events for shell commands spawned by the swatchdog utility that contain suspicious shell operators and the targeted MIB parameter.
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