Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
10 detections
Filters
Last updated
All Time
Detection languages
7
2
1
Contributors
6
3
1
Categories
7
5
3
2
1
Platforms
10
Products / Services
8
4
1
1
1
MITRE Techniques
8
4
3
3
3
CVEs
71
71
64
58
49
Detects execution patterns associated with known Water Hydra exploit chains, specifically targeting CVE-2023-38831 (WinRAR self-extracting archive exploitation) and CVE-2024-21412 (Mark-of-the-Web/SmartScreen bypass via nested internet shortcuts). The rule monitors process lineage for WinRAR spawning command interpreters from temporary extraction directories and command line anomalies associated with rundll32.exe triggered from internet shortcut chains.
This rule detects two distinct exploitation patterns: first, WinRAR (CVE-2023-38831) spawning script interpreters as child processes, typically indicative of opening malicious archives. Second, explorer.exe (CVE-2023-36025) spawning hidden PowerShell sessions, a technique used to bypass Windows SmartScreen protections via malicious LNK shortcuts.
Detects the exploitation of WinRAR CVE-2023-38831, where a maliciously crafted archive triggers WinRAR to execute a secondary payload (such as a script, LNK, or binary) from its temporary extraction directories (Rar$EXa, Rar$DIa, Rar$SR). This behavior is characteristic of adversaries using WinRAR as an initial access vector to bypass security controls.
Detects an executable initiating a network connection to "ngrok" domains. Attackers were seen using this "ngrok" in order to store their second stage payloads and malware. While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
Detects an executable initiating a network connection to "ngrok" domains.
Attackers were seen using this "ngrok" in order to store their second stage payloads and malware.
While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
Attackers were seen using this "ngrok" in order to store their second stage payloads and malware.
While communication with such domains can be legitimate, often times is a sign of either data exfiltration by malicious actors or additional download.
The analytic detects the execution of Windows shell processes initiated by WinRAR, such as "cmd.exe", "powershell.exe", "certutil.exe", "mshta.exe", or "bitsadmin.exe". This activity is significant because it may indicate exploitation of the WinRAR CVE-2023-38831 vulnerability, where malicious scripts are executed from spoofed ZIP archives. If confirmed malicious, this could lead to unauthorized access, financial loss, and further malicious activities like data theft or ransomware attacks.
Detects exploitation attempts of CVE-2023-38331 (WinRAR before v6.23), where an attacker can leverage WinRAR to execute arbitrary commands and binaries. The rule specifically looks for child processes spawned by WinRAR.exe, where the command line contains a temporary path indicative of the vulnerability (e.g., '\AppData\Local\Temp\Rar$') and a double extension (e.g., '.ext .exe'), combined with the execution of common binaries like cmd.exe, powershell.exe, or scripting hosts.
Detects the creation of a file by WinRAR with a double extension and a space in the filename, specifically targeting the temporary directory. This pattern is indicative of an exploitation attempt related to CVE-2023-38331, a vulnerability in WinRAR that allows for arbitrary code execution through specially crafted archives.
This rule detects the creation of potentially suspicious child processes by WinRAR.exe. Adversaries may exploit vulnerabilities in WinRAR, such as CVE-2023-38831, to achieve arbitrary code execution. This rule specifically looks for WinRAR.exe spawning common scripting or execution binaries like cmd.exe, cscript.exe, mshta.exe, powershell.exe, pwsh.exe, regsvr32.exe, rundll32.exe, and wscript.exe. Such activity is highly indicative of an adversary attempting to execute further commands or payloads after exploiting WinRAR.
Detects potentially suspicious child processes of WinRAR.exe.