Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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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 repeated attempts to delete Volume Shadow Copies using WMIC. This is a common technique used by ransomware and other malware to prevent system recovery and inhibit forensic investigations. The rule filters out known backup agents and service accounts and identifies patterns where multiple distinct deletions occur within a 5-minute window.
Detects high volumes of file renaming activities involving files with the .df_win extension. This pattern is often indicative of ransomware-like behavior where mass renaming occurs as part of an encryption process, impacting multiple directories.
Detects unauthorized or suspicious modifications to the SyncRootManager registry keys. This rule is designed to identify potential exploitation attempts, such as the ShieldCrash zero-day, which abuse the Windows CFAPI sync-root mechanisms to achieve privilege escalation or bypass security features. Legitimate synchronization software is explicitly excluded from this detection.
Detects network connection attempts to specific external domains associated with suspicious JavaScript payloads. The rule filters for specific file paths (e.g., mpackage.js, bsc-loader.js) linked to known malicious or suspicious URL patterns on cdn.claritydelivr.com, rcrsinnovations.com, konverto.in, and cdn.api-middle-connect.com, which may indicate C2 beaconing or malware infection.
Detects the creation or modification of specific dropper/loader files and service worker registration within WordPress directory structures (wp-content/plugins, wp-content/themes, wp-content/uploads). These files are often associated with the injection of malicious scripts (e.g., on-chain resolvers) to facilitate drive-by compromises by site visitors.
This rule detects browser activity where a page rendered via a data blob loads a sandboxed iframe containing cross-origin content originating from cdn.bloom.io. This pattern is consistent with known phishing delivery mechanisms often used in DocuSign or Teams-themed phishing campaigns to facilitate credential theft or secondary payloads.
This rule detects the installation of Windows services that utilize names or display names commonly associated with known malware, potentially mimicking legitimate system services to maintain persistence or evade detection.
Detects instances where PowerShell is used to download an executable named 'svchost.exe' from an external IP address (103.86.86.244). The rule monitors for network connections to this IP, file creation events matching specific download patterns in fonts directories, and direct command-line arguments involving the suspicious IP and file path, indicating potential malware dropper activity.
Detects the execution of 'famitrf2.exe' when it is launched as a child process of 'rserver3.exe' from the specific path 'C:\intel\rserver\rserver3.exe'. This pattern is highly indicative of Remote Administrator (RAdmin) software activity, which can be leveraged for legitimate remote management or malicious remote access.
This rule detects potentially malicious PowerShell execution patterns involving hidden windows, administrative elevation via 'Start-Process -Verb RunAs', and the targeting or execution of rsetup64.exe within specific system paths. It also flags execution chains where 'net session' commands, often used for discovery or local privilege verification, are piped to null and followed by or initiate the same target executables, suggesting lateral movement or persistence attempts.
Detects files referencing malicious implant install paths under C:\Windows\Fonts\web used to blend with legitimate system files
Detects files referencing malicious implant install paths under C:\Windows\Fonts\web used to blend with legitimate system files
Detects a host performing high-volume outbound network scanning (connecting to 10 or more distinct public IP addresses within 15 minutes) followed by the execution of an executable file created in common suspicious directories (AppData, Temp, Downloads, or Users/Public) within a short window (10 minutes after the scan). This pattern is indicative of a compromised host scanning for lateral movement opportunities or propagation targets, followed by the deployment of malicious tooling.
Detects PyInstaller-built UltraVNC installer renamed to svchost.exe and staged for deployment to the non-standard C:\Windows\Fonts\web directory
Detects PyInstaller-built UltraVNC installer renamed to svchost.exe and staged for deployment to the non-standard C:\Windows\Fonts\web directory
Detects the execution of command-line shells (cmd, powershell, pwsh) running under the SYSTEM context that were initiated by or associated with a process containing 'ShieldBreak' in its filename. This behavior is indicative of a suspicious or potentially malicious process (e.g., a security bypass tool) attempting to spawn elevated shells.
Detects a potential Kerberoasting attempt by identifying a single user or IP requesting multiple RC4-encrypted Ticket Granting Service (TGS) tickets for distinct service accounts within a short timeframe. Kerberoasting involves requesting TGS tickets for service accounts, which are then used for offline brute-force cracking of the service account's password hash.
Detects unauthorized processes (e.g., cmd.exe, powershell.exe, node.exe) accessing sensitive web browser files like 'Login Data' or 'Cookies' in common browser directories. This behavior is indicative of credential theft or data exfiltration attempts.
This rule detects potentially malicious activity involving the modification of Excel macro security settings (specifically VBAWarnings or AccessVBOM) or the creation of autorun.inf files on removable drives. It identifies these behaviors when they coincide with the execution of Synaptics.exe within a 30-minute window, suggesting a potential correlation between local administrative tasks and malicious document-based payloads or portable drive staging.
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