Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Malware User Agent
Sigma
Detects suspicious user agent strings used by malware in proxy logs
Detects suspicious DNS queries using base64 encoding
Detects Baby Shark C2 Framework default communication patterns
Detects setting a custom URL for OneDriveStandaloneUpdater.exe to download a file from the Internet without executing any
anomalous executables with suspicious arguments. The downloaded file will be in C:\Users\redacted\AppData\Local\Microsoft\OneDrive\StandaloneUpdaterreSignInSettingsConfig.json
anomalous executables with suspicious arguments. The downloaded file will be in C:\Users\redacted\AppData\Local\Microsoft\OneDrive\StandaloneUpdaterreSignInSettingsConfig.json
This rule detects the NjRAT backdoor, a remote access Trojan (RAT). It identifies two main versions of the malware based on distinct byte patterns related to persistence mechanisms, command and control (connect, send, receive) functionalities, and system information gathering. The rule looks for specific sequences of bytecode instructions indicative of NjRAT's operational logic.
Detects when a Microsoft Cloud App Security reported when users were active from an IP address that has been identified as an anonymous proxy IP address.
Detects an executable accessing an ngrok tunneling endpoint, which could be a sign of forbidden exfiltration of data exfiltration by malicious actors
Detects a suspicious curl process start on linux with set useragent options
Identifies the execution traces of the XCSSET malware. XCSSET is a macOS trojan that primarily spreads via Xcode projects and maliciously modifies applications. Infected users are also vulnerable to having their credentials, accounts, and other vital data stolen.
Detects strings used in command execution in DNS TXT Answer
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/
Detects WebDav DownloadCradle
Detects suspicious encoded User-Agent strings, as seen used by some malware.
Detects the usage of particular AttributeLDAPDisplayNames, which are known for data exchange via LDAP by the tool LDAPFragger and are additionally not commonly used in companies.
Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour
Detects DNS queries made by "AppInstaller.EXE". The AppInstaller is the default handler for the "ms-appinstaller" URI. It attempts to load/install a package from the referenced URL
Detects an executable initiating a network connection to "ngrok" tunneling domains.
Attackers were seen using this "ngrok" in order to store their second stage payloads and malware.
While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
Attackers were seen using this "ngrok" in order to store their second stage payloads and malware.
While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
Detects a network connection initiated by IMEWDBLD.EXE. This might indicate potential abuse of the utility as a LOLBIN in order to download arbitrary files or additional payloads.
Detects programs that connect to known malware callback ports based on statistical analysis from two different sandbox system databases
Detects execution of the Notepad++ updater (gup) from a process other than Notepad++ to download files.
Detects usage of the Sharp Chisel via the commandline arguments
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