Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects any modification (add, update, or delete) to Entra ID cross-tenant access settings. Adversaries may manipulate these trust configurations to weaken inbound security restrictions, establish unauthorized access between tenants, or facilitate cross-tenant impersonation.
This rule detects the creation of named pipes associated with known command-and-control (C2) frameworks, post-exploitation toolkits, and suspicious system activity. By filtering out common legitimate system processes and monitoring for specific pipe patterns (e.g., Cobalt Strike, Metasploit, PsExec, and sensitive RPC endpoints), the rule identifies potential lateral movement, remote execution, and post-exploitation communication channels.
Detects anomalous behavior associated with msiexec.exe that aligns with activity patterns of infostealer malwares like Lumma Stealer and Amadey Bot. This includes cross-process injection from unsigned processes, spawning of msiexec.exe by LOLBins or script interpreters, suspicious outbound network connectivity, and unauthorized access to browser credential storage files.
Detects modifications or publication of Azure Automation runbooks by users or service principals other than known, pre-approved automation service principals. This activity may indicate an unauthorized user or compromised service principal attempting to inject malicious code into automation workflows.
This rule detects successful OAuth logins originating from IP addresses identified as residential proxies. This behavior can indicate an adversary attempting to bypass geo-restrictions or obscure their true location, potentially as part of a credential stuffing attack, account takeover, or to evade detection.
This rule monitors for administrative VMware operations (cloning, snapshotting, or process manipulation) performed on sensitive infrastructure servers (such as Domain Controllers, PKI, Vault, or ADFS) that occur outside of a designated maintenance window by non-authorized accounts. It leverages tools like vim-cmd, esxcli, or govc to detect potential unauthorized VM manipulation that could lead to data theft, snapshot-based credential extraction, or unauthorized system changes.
This rule monitors for administrative VMware operations (cloning, snapshotting, or process manipulation) performed on sensitive infrastructure servers (such as Domain Controllers, PKI, Vault, or ADFS) that occur outside of a designated maintenance window by non-authorized accounts. It leverages tools like vim-cmd, esxcli, or govc to detect potential unauthorized VM manipulation that could lead to data theft, snapshot-based credential extraction, or unauthorized system changes.
This rule detects a suspicious sequence of network connections indicative of information stealer activity, specifically targeting behaviors observed with malware like VVS Stealer. It identifies instances where a non-browser process, originating from common user-writable or temporary directories (AppData, Temp, Downloads, Users\Public), first connects to an external IP discovery service (ipify.org) and then subsequently communicates with Discord services (discord.com or discordapp.com) within a ten-minute window. This pattern suggests that malware is collecting the victim's public IP address before exfiltrating stolen data (e.g., account or browser information) to Discord infrastructure, often used as a command and control or data exfiltration channel by stealers.
This rule detects the creation or modification of specific Launch Agent or Launch Daemon plist files on macOS, particularly those masquerading as 'com.apple.accountsd'. It also identifies the creation of a hidden directory '.com.apple.accountsd' within '/Library/Application Support'. This activity is highly suspicious as it indicates an attempt to establish persistence or execute malicious code by mimicking legitimate system services.
Detects the creation of scheduled tasks using schtasks.exe, where the command line arguments reference known LOLBins (Living Off the Land Binaries) such as certutil, regsvr32, mshta, wscript, cscript, rundll32, or encoded command execution via cmd.exe. This activity often indicates an attempt to establish persistence or execute malicious code using trusted system binaries.
Detects potential persistence or configuration activity associated with the Remcos Remote Access Trojan (RAT). The rule monitors for the creation or modification of registry keys explicitly named 'Remcos', as well as the addition of executables from suspicious paths (e.g., AppData, Temp) to the Windows 'Run' registry keys, a common technique for achieving persistence.
This rule detects potential persistence via Registry Run keys (T1547.001) where a value is added pointing to a file in an AppData or Temp directory, followed by a successful outbound network connection from a process located in those same directories. This behavior is indicative of malware or an adversary establishing persistence and immediately reaching out to a command-and-control (C2) server.
This rule detects the installation of known vulnerable kernel drivers (Bring Your Own Vulnerable Driver - BYOVD). These drivers are often exploited by adversaries to gain kernel-level code execution, elevate privileges, or disable security tools (EDR).
Detects potential persistence or configuration activity associated with the Remcos Remote Access Trojan (RAT). The rule monitors for the creation or modification of registry keys explicitly named 'Remcos', as well as the addition of executables from suspicious paths (e.g., AppData, Temp) to the Windows 'Run' registry keys, a common technique for achieving persistence.
Detects critical Windows system processes (svchost.exe, lsass.exe, csrss.exe, wininit.exe, winlogon.exe, spoolsv.exe) that are either spawned by unexpected parent processes or reside in non-standard directories. This behavior is indicative of potential masquerading, process injection, or malicious persistence attempts.
Detects the execution of PowerShell commands associated with the ClickFix social engineering tactic. This involves downloading and executing remote payloads, often followed by creating a .lnk file in the Startup folder for persistence.
This rule detects attempts to inject malicious DLLs into common Windows processes such as svchost.exe, explorer.exe, lsass.exe, and winlogon.exe. The detection is based on the loading of DLLs with suspicious names like 'hook.dll', 'inject.dll', 'payload.dll', or 'stage.dll' by these processes, which is indicative of process injection techniques often used by malware like Remcos RAT.
Detects attempts by unsigned or non-Microsoft processes to perform cross-process memory injection (such as CreateRemoteThread or NtCreateThreadEx) into critical processes including browser processes (chrome.exe, msedge.exe) or the local security authority subsystem service (lsass.exe).
Detects suspicious process injection attempts where common scripting/execution binaries (wscript.exe, cscript.exe, mshta.exe, powershell.exe, msiexec.exe) are observed creating remote threads in other processes (RegAsm.exe, InstallUtil.exe, vbc.exe, svchost.exe, explorer.exe). The detection is further refined by looking for specific keywords in the initiating process's command line that are indicative of malicious activity, such as downloading content or executing scripts. This rule aims to identify advanced persistent threats and malware leveraging process injection for defense evasion and privilege escalation.
Detects suspicious image loads where a renamed Microsoft .NET ClickOnce Launch Utility or other .NET masquerading binaries sideload mscoree.dll or msvcp140.dll from the ProgramData directory. This behavior is associated with the Lorem Ipsum threat activity.
Tycoon2FA PHaaS User Agent Detection
Cortex XDR
Detects user agents associated with Tycoon2FA phishing-as-a-service (PHaaS) campaigns, specifically targeting credential relay (axios/1.13.x) and device code phishing (node/undici) variants. The rule identifies sign-in attempts from unmanaged and non-compliant devices using these specific user agents during a device code flow authentication.
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