Sigma Rules
3,116 rules found
DNS TOR Proxies
Identifies IPs performing DNS lookups associated with common Tor proxies.
Executable from Webdav
Detects executable access via webdav6. Can be seen in APT 29 such as from the emulated APT 29 hackathon https://github.com/OTRF/detection-hackathon-apt29/
HTTP Request to Low Reputation TLD or Suspicious File Extension
Detects HTTP requests to low reputation TLDs (e.g. .xyz, .top, .ru) or ending in suspicious file extensions (.exe, .dll, .hta), which may indicate malicious activity.
WebDav Put Request
A General detection for WebDav user-agent being used to PUT files on a WebDav network share. This could be an indicator of exfiltration.
Publicly Accessible RDP Service
Detects connections from routable IPs to an RDP listener. Which is indicative of a publicly-accessible RDP service.
Remote Task Creation via ATSVC Named Pipe - Zeek
Detects remote task creation via at.exe or API interacting with ATSVC namedpipe
Possible Impacket SecretDump Remote Activity - Zeek
Detect AD credential dumping using impacket secretdump HKTL. Based on the SIGMA rules/windows/builtin/win_impacket_secretdump.yml
First Time Seen Remote Named Pipe - Zeek
This detection excludes known namped pipes accessible remotely and notify on newly observed ones, may help to detect lateral movement and remote exec using named pipes
Suspicious PsExec Execution - Zeek
detects execution of psexec or paexec with renamed service name, this rule helps to filter out the noise if psexec is used for legit purposes or if attacker uses a different psexec client other than sysinternal one
Suspicious Access to Sensitive File Extensions - Zeek
Detects known sensitive file extensions via Zeek
Transferring Files with Credential Data via Network Shares - Zeek
Transferring files with well-known filenames (sensitive files with credential data) using network shares
Kerberos Network Traffic RC4 Ticket Encryption
Detects kerberos TGS request using RC4 encryption which may be indicative of kerberoasting
Apache Segmentation Fault
Detects a segmentation fault error message caused by a crashing apache worker process
Apache Threading Error
Detects an issue in apache logs that reports threading related errors
Nginx Core Dump
Detects a core dump of a crashing Nginx worker process, which could be a signal of a serious problem or exploitation attempts.
Download from Suspicious Dyndns Hosts
Detects download of certain file types from hosts with dynamic DNS names (selected list)
Download From Suspicious TLD - Blacklist
Detects download of certain file types from hosts in suspicious TLDs
Download From Suspicious TLD - Whitelist
Detects executable downloads from suspicious remote systems
Windows WebDAV User Agent
Detects WebDav DownloadCradle
F5 BIG-IP iControl Rest API Command Execution - Proxy
Detects POST requests to the F5 BIG-IP iControl Rest API "bash" endpoint, which allows the execution of commands on the BIG-IP
Potential Hello-World Scraper Botnet Activity
Detects network traffic potentially associated with a scraper botnet variant that uses the "Hello-World/1.0" user-agent string.
HackTool - BabyShark Agent Default URL Pattern
Detects Baby Shark C2 Framework default communication patterns
HackTool - CobaltStrike Malleable Profile Patterns - Proxy
Detects cobalt strike malleable profiles patterns (URI, User-Agents, Methods).
HackTool - Empire UserAgent URI Combo
Detects user agent and URI paths used by empire agents
PUA - Advanced IP/Port Scanner Update Check
Detect the update check performed by Advanced IP/Port Scanner utilities.
PwnDrp Access
Detects downloads from PwnDrp web servers developed for red team testing and most likely also used for criminal activity
Raw Paste Service Access
Detects direct access to raw pastes in different paste services often used by malware in their second stages to download malicious code in encrypted or encoded form
Flash Player Update from Suspicious Location
Detects a flashplayer update from an unofficial location
Suspicious Network Communication With IPFS
Detects connections to interplanetary file system (IPFS) containing a user's email address which mirrors behaviours observed in recent phishing campaigns leveraging IPFS to host credential harvesting webpages.
Telegram API Access
Detects suspicious requests to Telegram API without the usual Telegram User-Agent
APT User Agent
Detects suspicious user agent strings used in APT malware in proxy logs
Suspicious Base64 Encoded User-Agent
Detects suspicious encoded User-Agent strings, as seen used by some malware.
Bitsadmin to Uncommon IP Server Address
Detects Bitsadmin connections to IP addresses instead of FQDN names
Bitsadmin to Uncommon TLD
Detects Bitsadmin connections to domains with uncommon TLDs
Crypto Miner User Agent
Detects suspicious user agent strings used by crypto miners in proxy logs
HTTP Request With Empty User Agent
Detects a potentially suspicious empty user agent strings in proxy log. Could potentially indicate an uncommon request method.
Exploit Framework User Agent
Detects suspicious user agent strings used by exploit / pentest frameworks like Metasploit in proxy logs
Hack Tool User Agent
Detects suspicious user agent strings user by hack tools in proxy logs
Malware User Agent
Detects suspicious user agent strings used by malware in proxy logs
Windows PowerShell User Agent
Detects Windows PowerShell Web Access
Rclone Activity via Proxy
Detects the use of rclone, a command-line program to manage files on cloud storage, via its default user-agent string
Suspicious User Agent
Detects suspicious malformed user agent strings in proxy logs
Potential Base64 Encoded User-Agent
Detects User Agent strings that end with an equal sign, which can be a sign of base64 encoding.
Suspicious External WebDAV Execution
Detects executables launched from external WebDAV shares using the WebDAV Explorer integration, commonly seen in initial access campaigns.
F5 BIG-IP iControl Rest API Command Execution - Webserver
Detects POST requests to the F5 BIG-IP iControl Rest API "bash" endpoint, which allows the execution of commands on the BIG-IP
Successful IIS Shortname Fuzzing Scan
When IIS uses an old .Net Framework it's possible to enumerate folders with the symbol "~"
Java Payload Strings
Detects possible Java payloads in web access logs
JNDIExploit Pattern
Detects exploitation attempt using the JNDI-Exploit-Kit