Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the usage of "msedge_proxy.exe" to download arbitrary files by looking for its execution with command-line arguments containing 'http://' or 'https://'. This behavior can be abused for defense evasion and execution.
Detects when files are transferred using the ScreenConnect Remote Monitoring and Management (RMM) tool. This activity can indicate an adversary using legitimate tools for data exfiltration or staging.
Detects when the CertOC.exe utility is used to download a file from an IP address-based URL. This behavior is suspicious as CertOC.exe is a legitimate Windows binary that can be abused for ingress tool transfer, and downloading from an IP address directly often bypasses DNS-based security controls and can indicate malicious activity.
This rule detects the use of 'curl.exe' to download files from an IP address directly specified in the command line. It specifically looks for curl.exe execution, a command line containing an IP address pattern, the 'http' protocol, and common download flags such as '-O', '--remote-name', or '--output'. This activity is often associated with adversaries transferring tools or malware onto a compromised system.
Detects when Microsoft Cloud App Security reports that an OAuth application has downloaded multiple files from Microsoft SharePoint or Microsoft OneDrive in a manner that is unusual for the user. This activity could indicate unauthorized data exfiltration by a compromised or malicious OAuth app.
Detects the execution of 'wget' to download a '.tar' file from an untrusted direct IP address, specifically when the '--no-check-certificate' flag is used. This behavior has been observed in attacks attributed to UNC4841 during their exploitation of Barracuda ESG zero-day vulnerabilities.
Detects attempts to download executable files via WebDAV. This activity has been observed in campaigns attributed to APT29, where adversaries leverage WebDAV to transfer malicious tools into a compromised environment.
Detects the download of potentially malicious file types (executables, scripts, documents, archives, etc.) from domains using suspicious or commonly abused Top-Level Domains (TLDs). This rule aims to identify initial access attempts often associated with phishing or drive-by download campaigns.
Detects the execution of 'wget' to download compressed files ('.zip' or '.rar') from 'temp.sh'. This activity has been observed in attacks attributed to UNC4841, specifically during their exploitation of Barracuda ESG zero-day vulnerabilities.
Detects the download of suspicious file types from URLs containing direct IP addresses. This rule specifically looks for the creation of Zone.Identifier alternate data streams (ADS) for common executable or script file extensions, indicating a file downloaded from the internet, combined with a URL that uses an IP address instead of a domain name. This behavior can be indicative of malware delivery or staging.
Detects a BITS transfer job downloading file(s) from a direct IP address. This technique is often used by adversaries for defense evasion and persistence, as BITS jobs can operate in the background, bypass some firewall rules, and persist across reboots.
Detects potential malicious .ICO files downloaded from a compromised 3CXDesktopApp via web requests to a malicious GitHub repository, indicative of the SmoothOperator campaign.
Detects downloads of potentially malicious file types (executables, scripts, documents, archives) from domains that are not common Top-Level Domains (TLDs). This rule aims to identify suspicious file transfers that bypass typical, trusted sources.
This rule detects when the Background Intelligent Transfer Service (BITS) creates a new transfer job that saves a local file with a potentially suspicious extension. The suspicious extensions include '.bat', '.dll', '.exe', '.hta', '.ps1', '.psd1', '.sh', '.vbe', and '.vbs'. It specifically filters out common legitimate updates from applications like Chrome and Dropbox that download files into 'AppData' directories or from '.com' domains to reduce false positives.
Detects the creation of new Office macro files on systems via applications such as web browsers or email clients. This rule identifies files with common Office macro extensions (.docm, .dotm, .xlsm, .xltm, .potm, .pptm) or those with Zone.Identifier streams indicating a download, when created by known browser or email client processes.
Detects the use of bitsadmin.exe to download files with suspicious extensions. This technique is often used by adversaries for defense evasion and persistence by leveraging a legitimate Windows utility to transfer malicious payloads.
Detects the use of the built-in Windows utility bitsadmin.exe to download files. This utility is often abused by adversaries for ingress tool transfer, as it can bypass certain network restrictions and is a living-off-the-land binary (LOLBIN). The rule specifically looks for the execution of bitsadmin.exe with command-line arguments indicative of file transfer operations, such as '/transfer', '/create', '/addfile', and the presence of 'http' to signify a URL download.
Detects HTTP GET requests for specific file paths associated with the RomCom threat actor, potentially exploiting CVE-2023-36884. These file paths include various file types such as .url, .search-ms, .vbs, .mht, and .asp, which are likely used for initial access or further stages of the attack.
This rule detects the use of the `wget` command-line utility to download files into potentially suspicious directories, specifically `/tmp/`. Adversaries often use `wget` for ingress tool transfer, downloading malicious payloads or additional tools to a compromised system. The rule looks for `wget` execution combined with the `-O` or `--output-document` flags, which specify an output file, and the presence of `/tmp/` in the command line, indicating a download to a common temporary directory often abused by attackers.
Detects the download of executable, script, archive, and document file types from hosts associated with dynamic DNS services. These services are often abused by adversaries for command and control or for hosting malicious content due to their ability to frequently change IP addresses, making them harder to track and block.
Detects the execution of 'curl.exe' on Windows systems. This activity can indicate an attempt to download files from a remote location, make web requests to external servers, or potentially be used for command and control communication. Adversaries often use tools like curl for ingress tool transfer or to retrieve additional malicious payloads.
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