Sigma Rules
3,731 rules found
FakeUpdates/SocGholish Activity
Detects initial execution of FakeUpdates/SocGholish malware via wscript that later executes commands via cmd or powershell.
MSSQL Extended Stored Procedure Backdoor Maggie
This rule detects the execution of the extended storage procedure backdoor named Maggie in the context of Microsoft SQL server
Potential ACTINIUM Persistence Activity
Detects specific process parameters as used by ACTINIUM scheduled task persistence creation.
MERCURY APT Activity
Detects suspicious command line patterns seen being used by MERCURY APT
CVE-2023-1389 Potential Exploitation Attempt - Unauthenticated Command Injection In TP-Link Archer AX21
Detects potential exploitation attempt of CVE-2023-1389 an Unauthenticated Command Injection in TP-Link Archer AX21.
Exploitation Indicators Of CVE-2023-20198
Detecting exploitation indicators of CVE-2023-20198 a privilege escalation vulnerability in Cisco IOS XE Software Web UI.
MSMQ Corrupted Packet Encountered
Detects corrupted packets sent to the MSMQ service. Could potentially be a sign of CVE-2023-21554 exploitation
CVE-2023-22518 Exploitation Attempt - Suspicious Confluence Child Process (Linux)
Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
CVE-2023-22518 Exploitation Attempt - Suspicious Confluence Child Process (Windows)
Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Proxy)
Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
CVE-2023-22518 Exploitation Attempt - Vulnerable Endpoint Connection (Webserver)
Detects exploitation attempt of CVE-2023-22518 (Confluence Data Center / Confluence Server), where an attacker can exploit vulnerable endpoints to e.g. create admin accounts and execute arbitrary commands.
Potential CVE-2023-2283 Exploitation
Detects potential exploitation attempt of CVE-2023-2283 an authentication bypass in libSSH. The exploitation method causes an error message stating that keys for curve25519 could not be generated. It is an error message that is a sign of an exploitation attempt. It is not a sign of a successful exploitation.
Outlook Task/Note Reminder Received
Detects changes to the registry values related to outlook that indicates that a reminder was triggered for a Note or Task item. This could be a sign of exploitation of CVE-2023-23397. Further investigation is required to determine the success of an exploitation.
CVE-2023-23397 Exploitation Attempt
Detects outlook initiating connection to a WebDAV or SMB share, which could be a sign of CVE-2023-23397 exploitation.
Potential CVE-2023-23397 Exploitation Attempt - SMB
Detects (failed) outbound connection attempts to internet facing SMB servers. This could be a sign of potential exploitation attempts of CVE-2023-23397.
Potential CVE-2023-23752 Exploitation Attempt
Detects the potential exploitation attempt of CVE-2023-23752 an Improper access check, in web service endpoints in Joomla
Potential CVE-2023-25157 Exploitation Attempt
Detects a potential exploitation attempt of CVE-2023-25157 a SQL injection in GeoServer
Potential CVE-2023-25717 Exploitation Attempt
Detects a potential exploitation attempt of CVE-2023-25717 a Remote Code Execution via an unauthenticated HTTP GET Request, in Ruckus Wireless Admin
Potential CVE-2023-27363 Exploitation - HTA File Creation By FoxitPDFReader
Detects suspicious ".hta" file creation in the startup folder by Foxit Reader. This can be an indication of CVE-2023-27363 exploitation.
Potential CVE-2023-27997 Exploitation Indicators
Detects indicators of potential exploitation of CVE-2023-27997 in Frotigate weblogs. To avoid false positives it is best to look for successive requests to the endpoints mentioned as well as weird values of the "enc" parameter
Potential MOVEit Transfer CVE-2023-34362 Exploitation - File Activity
Detects file indicators of potential exploitation of MOVEit CVE-2023-34362.
Potential MOVEit Transfer CVE-2023-34362 Exploitation - Dynamic Compilation Via Csc.EXE
Detects the execution of "csc.exe" via "w3wp.exe" process. MOVEit affected hosts execute "csc.exe" via the "w3wp.exe" process to dynamically compile malicious DLL files. MOVEit is affected by a critical vulnerability. Exploited hosts show evidence of dynamically compiling a DLL and writing it under C:\\Windows\\Microsoft\.NET\\Framework64\\v4\.0\.30319\\Temporary ASP\.NET Files\\root\\([a-z0-9]{5,12})\\([a-z0-9]{5,12})\\App_Web_[a-z0-9]{5,12}\.dll. Hunting Opportunity Events from IIS dynamically compiling binaries via the csc.exe on behalf of the MOVEit application, especially since May 27th should be investigated.
MOVEit CVE-2023-34362 Exploitation Attempt - Potential Web Shell Request
Detects get requests to specific files used during the exploitation of MOVEit CVE-2023-34362
Potential CVE-2023-36874 Exploitation - Uncommon Report.Wer Location
Detects the creation of a "Report.wer" file in an uncommon folder structure. This could be a sign of potential exploitation of CVE-2023-36874.
Potential CVE-2023-36874 Exploitation - Fake Wermgr.Exe Creation
Detects the creation of a file named "wermgr.exe" being created in an uncommon directory. This could be a sign of potential exploitation of CVE-2023-36874.
Potential CVE-2023-36874 Exploitation - Fake Wermgr Execution
Detects the execution of a renamed "cmd", "powershell" or "powershell_ise" binary. Attackers were seen using these binaries in a renamed form as "wermgr.exe" in exploitation of CVE-2023-36874
Potential CVE-2023-36884 Exploitation Dropped File
Detects a specific file being created in the recent folder of Office. These files have been seen being dropped during potential exploitations of CVE-2023-36884
Potential CVE-2023-36884 Exploitation Pattern
Detects a unique pattern seen being used by RomCom potentially exploiting CVE-2023-36884
Potential CVE-2303-36884 URL Request Pattern Traffic
Detects a specific URL pattern containing a specific extension and parameters pointing to an IP address. This pattern was seen being used by RomCOM potentially exploiting CVE-2023-36884
Potential CVE-2023-36884 Exploitation - File Downloads
Detects files seen being requested by RomCom while potentially exploiting CVE-2023-36884
Potential CVE-2023-36884 Exploitation - URL Marker
Detects a unique URL marker seen being used by RomCom potentially exploiting CVE-2023-36884
Potential CVE-2023-36884 Exploitation - Share Access
Detects access to a file share with a naming schema seen being used during exploitation of CVE-2023-36884
CVE-2023-38331 Exploitation Attempt - Suspicious Double Extension File
Detects the creation of a file with a double extension and a space by WinRAR. This could be a sign of exploitation of CVE-2023-38331
CVE-2023-38331 Exploitation Attempt - Suspicious WinRAR Child Process
Detects exploitation attempt of CVE-2023-38331 (WinRAR before v6.23), where an attacker can leverage WinRAR to execute arbitrary commands and binaries.
CVE-2023-40477 Potential Exploitation - .REV File Creation
Detects the creation of ".rev" files by WinRAR. Could be indicative of potential exploitation of CVE-2023-40477. Look for a suspicious execution shortly after creation or a WinRAR application crash.
CVE-2023-40477 Potential Exploitation - WinRAR Application Crash
Detects a crash of "WinRAR.exe" where the version is lower than 6.23. This could indicate potential exploitation of CVE-2023-40477
Potential Information Disclosure CVE-2023-43261 Exploitation - Proxy
Detects exploitation attempts of CVE-2023-43261 and information disclosure in Milesight UR5X, UR32L, UR32, UR35, UR41 before v35.3.0.7 that allows attackers to access sensitive router components in proxy logs.
Potential Information Disclosure CVE-2023-43261 Exploitation - Web
Detects exploitation attempts of CVE-2023-43261 and information disclosure in Milesight UR5X, UR32L, UR32, UR35, UR41 before v35.3.0.7 that allows attackers to access sensitive router components in access logs.
Potential CVE-2023-46214 Exploitation Attempt
Detects potential exploitation of CVE-2023-46214, a remote code execution (RCE) in Splunk Enterprise through insecure XML parsing
Exploitation Attempt Of CVE-2023-46214 Using Public POC Code
Detects exploitation attempt of CVE-2023-46214, a remote code execution (RCE) in Splunk Enterprise through insecure XML parsing using known public proof of concept code
CVE-2023-46747 Exploitation Activity - Proxy
Detects exploitation activity of CVE-2023-46747 an unauthenticated remote code execution vulnerability in F5 BIG-IP.
CVE-2023-46747 Exploitation Activity - Webserver
Detects exploitation activity of CVE-2023-46747 an unauthenticated remote code execution vulnerability in F5 BIG-IP.
CVE-2023-4966 Exploitation Attempt - Citrix ADC Sensitive Information Disclosure - Proxy
Detects exploitation attempt of CVE-2023-4966 a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability via proxy logs by looking for a very long host header string.
CVE-2023-4966 Potential Exploitation Attempt - Citrix ADC Sensitive Information Disclosure - Proxy
Detects potential exploitation attempt of CVE-2023-4966 a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability via proxy logs.
CVE-2023-4966 Potential Exploitation Attempt - Citrix ADC Sensitive Information Disclosure - Webserver
Detects potential exploitation attempt of CVE-2023-4966 a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability via webserver logs.
CVE-2023-4966 Exploitation Attempt - Citrix ADC Sensitive Information Disclosure - Webserver
Detects exploitation attempt of CVE-2023-4966 a Citrix ADC and NetScaler Gateway sensitive information disclosure vulnerability via webserver logs by looking for a very long host header string.
Potential Exploitation Attempt Of Undocumented WindowsServer RCE
Detects potential exploitation attempt of undocumented Windows Server Pre Auth Remote Code Execution (RCE)
Potential COLDSTEEL RAT File Indicators
Detects the creation of a file named "dllhost.exe" in the "C:\users\public\Documents\" directory. Seen being used by the COLDSTEEL RAT in some of its variants.