Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
119 detections
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Detects when the IIS worker process (w3wp.exe) spawns common system and network discovery utilities such as whoami, ipconfig, systeminfo, net, and others, which may indicate web shell activity or post-exploitation discovery.
The following analytic identifies network share discovery and collection activities performed on Windows systems using the Net command. Attackers often use network share discovery to identify accessible shared resources within a network, which can be a precursor to privilege escalation or data exfiltration. By monitoring Windows Event Logs for the usage of the Net command to list and interact with network shares, this detection helps identify potential reconnaissance and collection activities.
Identifies execution of network share enumeration commands (smbutil, showmount) that can be leveraged by adversaries to discover accessible SMB and NFS resources, supporting internal reconnaissance and potential lateral movement.
The following analytic detects access to Windows administrative SMB shares (Admin$, IPC$, C$) using the 'dir' command. It leverages Windows Security Event Logs with EventCode 5140 to identify this activity.
This behavior is significant as it is commonly used by tools like PsExec/PaExec for staging binaries before creating and starting services on remote endpoints, a technique often employed by adversaries for lateral movement and remote code execution.
If confirmed malicious, this activity could allow attackers to propagate malware, such as IcedID, across the network, leading to widespread infection and potential data breaches.
This behavior is significant as it is commonly used by tools like PsExec/PaExec for staging binaries before creating and starting services on remote endpoints, a technique often employed by adversaries for lateral movement and remote code execution.
If confirmed malicious, this activity could allow attackers to propagate malware, such as IcedID, across the network, leading to widespread infection and potential data breaches.
The following analytic detects the execution of the Invoke-ShareFinder PowerShell cmdlet from PowerView. This detection leverages PowerShell Script Block Logging to identify instances where this specific command is executed. Monitoring this activity is crucial as it indicates an attempt to enumerate network file shares, which may contain sensitive information such as backups, scripts, and credentials. If confirmed malicious, this activity could enable an attacker to escalate privileges or move laterally within the network, potentially compromising additional systems and sensitive data.
Detects the manual enablement of network discovery services (fdrespub, fdPHost, SSDPSRV, upnphost) and the associated Windows Firewall rules. This activity is a known tactic used by Gentlemen ransomware to facilitate lateral movement and network share enumeration by making the compromised host visible to others and allowing it to discover peers.
Detects network discovery activities including ICMP sweeps, ARP cache checks, and SMB share/session enumeration, which are common tactics used for internal reconnaissance by the threat group APT36 (Transparent Tribe).
Detects the use of net.exe or net1.exe to establish an IPC$ share connection. This is a common method for lateral movement and reconnaissance by attackers to verify administrative access or interact with remote systems via SMB. The rule specifically flags commands involving the IPC$ share, with logic to identify if a specific user was specified or if an anonymous session was attempted.
Detects common Windows command-line utilities used for internal network reconnaissance, including ARP cache queries, NetBIOS enumeration, SMB share/session discovery, and subnet ping sweeps. These techniques are frequently employed by adversaries for lateral movement preparation and internal network mapping.
This rule identifies potential network scanning or propagation activity by detecting a single host initiating SMB (TCP 445) connections to a high number (more than 20) of unique destination IP addresses within a given timeframe. This behavior is often indicative of internal reconnaissance, lateral movement, or worm-like propagation.
Detects anomalous sequential SMB scanning patterns across a /24 subnet and subsequent SMB share enumeration attempts (NetShareEnum) from a single host, consistent with reconnaissance activities associated with the DragonForce threat actor group.
Detects the SMB share discovery pattern associated with the DragonForce ransomware, where the system enumerates network shares (excluding ADMIN$) followed by unauthorized bulk write operations to these shares, indicating potential lateral movement and file encryption.
Detects the execution of common command-line utilities used for network reconnaissance and discovery, such as arp, nbtstat, net, and ping. These commands are frequently used by adversaries to map network infrastructure, identify active hosts, and discover shared resources on a target network.
This rule detects various common command-line techniques used for network reconnaissance and internal environment enumeration on Windows systems. It tracks the execution of native tools such as ARP for ARP cache dumping, Ping for subnet sweeps, and NetBIOS or SMB-related commands (nbtstat, net view, net share, net session) to identify remote systems, network shares, and active sessions.
Detects a host initiating rapid sequential SMB tree connections to more than 10 distinct remote hosts within a 5-minute window. This behavior is indicative of network reconnaissance, specifically the enumeration of accessible SMB shares, which is a common precursor to lateral movement and large-scale ransomware encryption activity as observed in DragonForce-related incidents.
Detects instances where the ESET Remote Administrator Agent (ERAAgent.exe) modifies registry keys related to Windows network security settings, such as LSA policies, NullSession pipes/shares, or server/workstation auto-sharing. These settings can be manipulated to weaken Windows security posture, potentially facilitating lateral movement or credential access.
Detects high-frequency TCP/445 connection attempts (a 'connect sweep') characteristic of automated SMB share enumeration, which is commonly used for lateral movement reconnaissance. The rule triggers when a threshold of 40 connection requests occurs from a single source within a 30-second window, specifically targeting SMB-related lateral movement behaviors.
Detects high-frequency TCP/445 connection attempts (a 'connect sweep') characteristic of automated SMB share enumeration, which is commonly used for lateral movement reconnaissance. The rule triggers when a threshold of 40 connection requests occurs from a single source within a 30-second window, specifically targeting SMB-related lateral movement behaviors.
Detects instances where the ESET Remote Administrator Agent (ERAAgent.exe) modifies registry keys related to Windows network security settings, such as LSA policies, NullSession pipes/shares, or server/workstation auto-sharing. These settings can be manipulated to weaken Windows security posture, potentially facilitating lateral movement or credential access.
Detects high-frequency TCP/445 connection attempts (a 'connect sweep') characteristic of automated SMB share enumeration, which is commonly used for lateral movement reconnaissance. The rule triggers when a threshold of 40 connection requests occurs from a single source within a 30-second window, specifically targeting SMB-related lateral movement behaviors.
Detects instances where the ESET Remote Administrator Agent (ERAAgent.exe) modifies registry keys related to Windows network security settings, such as LSA policies, NullSession pipes/shares, or server/workstation auto-sharing. These settings can be manipulated to weaken Windows security posture, potentially facilitating lateral movement or credential access.
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