Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects suspicious PowerShell activity potentially associated with the 'Ptero' malware family. The rule correlates several behaviors: direct invocation of PowerShell with known Ptero-related script names, execution spawned by common phishing delivery parents (such as Office applications or web scripting engines), PowerShell downloading files from Cloudflare Workers domains, and the correlation of PowerShell network download activity with subsequent registry-based persistence modifications.
Detects the execution of SharpGPOAbuse for malicious Group Policy Object (GPO) manipulation, specifically identifying characteristic command-line arguments used for task creation and modification. The rule also monitors for subsequent forced GPO updates via net.exe or net1.exe, often associated with post-exploitation activities in the StrikeShark campaign.
Detects the BQT/start.exe loader exhibiting suspicious behavior indicative of sandbox or analysis environment evasion, including checking for common analysis tools, enumerating processes, or querying the registry for VMware-related artifacts.
Detects the deployment and activity of the Remcos Remote Access Trojan (RAT) as part of the BQTLock (BaqiyatLock) attack chain. This rule monitors for process injection into critical Windows processes, malicious Run key persistence entries, non-standard outbound TLS communication from non-browser processes, and the creation of potential keylogging artifacts in the AppData directory.
Detects the execution of QEMU binary processes with command-line arguments targeting database or virtual disk files (e.g., .qcow2, .db) or matching known malicious file hashes. This behavior is indicative of unauthorized use of virtualization tools to execute payloads, conduct forensics, or manipulate virtual disk images in an environment.
Detects the execution of known remote access and monitoring software (RMM/RAT) when launched as a child process of common web browsers or email clients. This behavioral pattern is frequently observed in phishing attacks where users are tricked into downloading and executing remote support tools, a technique often associated with the Luna Moth (Silent Ransom Group) campaign.
Detects instances where the Node.js runtime (node.exe) spawns a command shell or scripting interpreter (cmd.exe, powershell.exe, or wscript.exe). The detection specifically looks for these processes being initiated from directories commonly associated with Node.js package management (npm) or local module installations, which may indicate malicious activity such as software supply chain attacks or execution of obfuscated scripts.
Detects the execution of known Command and Control (C2) frameworks such as Sliver, Havoc, SparkRAT, or VShell from common suspicious temporary or staging directories (temp, tmp, appdata, programdata). This rule monitors process creation events to identify the presence of these unauthorized remote access tools.
Detects the use of BPF syscalls by non-root processes or the execution of BPF-related utilities (bpftool, bpfcc) from an interactive shell. This behavior is often associated with the ShadowGuard rootkit and potential BPF-based backdoor activity, which leverages BPF programs for stealthy system monitoring or command execution.
This rule detects suspicious activity related to the Netlogon service or the LSASS process. It triggers on Netlogon service events (5827, 5828, 5829) which may indicate insecure channel usage or service issues often associated with exploitation, and on Sysmon Event ID 1 where a process is spawned by lsass.exe under the SYSTEM user, a behavior frequently seen during credential dumping or privilege escalation attempts.
Detects activity associated with the TA4922 (Silver Fox) threat actor, specifically involving Atlas RAT and RomulusLoader. The detection logic utilizes four primary telemetry sources: network connections to known C2 IP addresses, DNS queries for the 'srt.tw' domain, suspicious outbound connections from user-writable directories (AppData, Temp, etc.) over non-standard ports, and the execution of a specific malicious ZIP archive file identified by its SHA256 hash.
Detects BQTLock (BaqiyatLock) ransomware activities involving the exfiltration of stolen data, credentials, or infection reports. The rule identifies suspicious outbound network connections to known C2-enabling web services (Telegram Bot API and Discord webhooks) initiated by the BQT.exe or start.exe processes, which are typical indicators of this ransomware variant.
Detects the spawning of Windows Script Host (wscript.exe or cscript.exe) as a child process of common web browsers (chrome.exe, msedge.exe, firefox.exe). This pattern is often indicative of a drive-by download attack or a user executing a malicious script file downloaded from the internet.
Detects suspicious bulk archiving activity or file drops of archive formats in staging directories. The rule monitors for common archival utilities (7zip, WinRAR) or PowerShell's Compress-Archive command being used, or the creation of archive files in suspicious paths (e.g., Temp, AppData, Public). It alerts when high volumes of archives are created, password-protected archives are used, or rapid archival operations are performed.
Detects the execution of NetExec (formerly CrackMapExec) binaries, associated named pipe creation, and suspicious bursts of authentication activity indicating potential lateral movement or password spraying attacks.
Detects execution of unusual preinstall, setup, or GitHub scripts initiated by Node Package Manager (npm) or node processes. This behavior is indicative of a supply chain attack or malicious dependency execution during the installation process of a package.
Detects the use of legitimate Windows system utilities (ntdsutil.exe, vssadmin.exe, esentutl.exe) to interact with the Active Directory database file (ntds.dit). This behavior is commonly associated with offline credential harvesting, where an attacker attempts to create a copy of the database to extract hashes offline.
Detects execution of PowerShell commands associated with the Pay2Key ransomware, specifically searching for command lines that reference bin-staged payloads (data1.bin, data2.bin, data3.bin) and a hardcoded XOR key (12199) used to deobfuscate the payloads in memory before execution via Invoke-Expression or similar methods.
This rule detects a sequence of suspicious activities on macOS: downloading a file from a potentially malicious source using curl, mounting a disk image using hdiutil, and subsequently opening files from the mounted volume. This pattern is commonly associated with the delivery and execution of malicious payloads, such as trojanized software or malware installers.
This rule detects attempts to enumerate Active Directory domain trust relationships using common administrative tools. It identifies the execution of 'nltest.exe' with trust-related arguments ('/domain_trusts', '/trusted_domains', '/all_trusts', '/dclist:') and the usage of PowerShell cmdlets or commands ('Get-ADTrust', 'netdom query trust', or Active Directory domain queries) known for querying domain trust configurations. Adversaries often perform this discovery to map out Windows multi-domain or forest environments to identify lateral movement opportunities.
This rule detects various methods used to copy or access the Active Directory database (NTDS.dit), a common technique used by attackers to dump domain credentials. The rule monitors for the use of ntdsutil with 'ifm' (install from media) arguments, vssadmin to create volume shadow copies of the NTDS file, esentutl directly interacting with the NTDS database path, and common file copy utilities attempting to copy the NTDS.dit file.
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