Sigma Rules
1,619 rules found
Potential Conti Ransomware Database Dumping Activity Via SQLCmd
Detects a command used by conti to dump database
DarkSide Ransomware Pattern
Detects DarkSide Ransomware and helpers
Potential Devil Bait Malware Reconnaissance
Detects specific process behavior observed with Devil Bait samples
Potential Goofy Guineapig Backdoor Activity
Detects a specific broken command that was used by Goofy-Guineapig as described by the NCSC report.
Potential Goofy Guineapig GoolgeUpdate Process Anomaly
Detects "GoogleUpdate.exe" spawning a new instance of itself in an uncommon location as seen used by the Goofy Guineapig backdoor
Pingback Backdoor Activity
Detects the use of Pingback backdoor that creates ICMP tunnel for C2 as described in the trustwave report
Small Sieve Malware CommandLine Indicator
Detects specific command line argument being passed to a binary as seen being used by the malware Small Sieve.
HAFNIUM Exchange Exploitation Activity
Detects activity observed by different researchers to be HAFNIUM group activity (or related) on Exchange servers
REvil Kaseya Incident Malware Patterns
Detects process command line patterns and locations used by REvil group in Kaseya incident (can also match on other malware)
SOURGUM Actor Behaviours
Suspicious behaviours related to an actor tracked by Microsoft as SOURGUM
Potential CVE-2023-21554 QueueJumper Exploitation
Detects potential exploitation of CVE-2023-21554 (dubbed QueueJumper)
Potential CVE-2022-22954 Exploitation Attempt - VMware Workspace ONE Access Remote Code Execution
Detects potential exploitation attempt of CVE-2022-22954, a remote code execution vulnerability in VMware Workspace ONE Access and Identity Manager. As reported by Morphisec, part of the attack chain, threat actors used PowerShell commands that executed as a child processes of the legitimate Tomcat "prunsrv.exe" process application.
Atlassian Confluence CVE-2022-26134
Detects spawning of suspicious child processes by Atlassian Confluence server which may indicate successful exploitation of CVE-2022-26134
Potential CVE-2022-26809 Exploitation Attempt
Detects suspicious remote procedure call (RPC) service anomalies based on the spawned sub processes (long shot to detect the exploitation of vulnerabilities like CVE-2022-26809)
Potential CVE-2022-29072 Exploitation Attempt
Detects potential exploitation attempts of CVE-2022-29072, a 7-Zip privilege escalation and command execution vulnerability. 7-Zip version 21.07 and earlier on Windows allows privilege escalation (CVE-2022-29072) and command execution when a file with the .7z extension is dragged to the Help>Contents area. This is caused by misconfiguration of 7z.dll and a heap overflow. The command runs in a child process under the 7zFM.exe process.
Apache Spark Shell Command Injection - ProcessCreation
Detects attempts to exploit an apache spark server via CVE-2014-6287 from a commandline perspective
Suspicious Sysmon as Execution Parent
Detects suspicious process executions in which Sysmon itself is the parent of a process, which could be a sign of exploitation (e.g. CVE-2022-41120)
ChromeLoader Malware Execution
Detects execution of ChromeLoader malware via a registered scheduled task
Emotet Loader Execution Via .LNK File
Detects the Emotet Epoch4 loader as reported by @malware_traffic back in 2022. The ".lnk" file was delivered via phishing campaign.
Hermetic Wiper TG Process Patterns
Detects process execution patterns found in intrusions related to the Hermetic Wiper malware attacks against Ukraine in February 2022
Raspberry Robin Subsequent Execution of Commands
Detects raspberry robin subsequent execution of commands.
Raspberry Robin Initial Execution From External Drive
Detects the initial execution of the Raspberry Robin malware from an external drive using "Cmd.EXE".
Potential Raspberry Robin Dot Ending File
Detects commandline containing reference to files ending with a "." This scheme has been seen used by raspberry-robin
Serpent Backdoor Payload Execution Via Scheduled Task
Detects post exploitation execution technique of the Serpent backdoor. According to Proofpoint, one of the commands that the backdoor ran was via creating a temporary scheduled task using an unusual method. It creates a fictitious windows event and a trigger in which once the event is created, it executes the payload.
FakeUpdates/SocGholish Activity
Detects initial execution of FakeUpdates/SocGholish malware via wscript that later executes commands via cmd or powershell.
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-2023-22518 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.
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.
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
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.
Potential Exploitation Attempt Of Undocumented WindowsServer RCE
Detects potential exploitation attempt of undocumented Windows Server Pre Auth Remote Code Execution (RCE)
COLDSTEEL RAT Anonymous User Process Execution
Detects the creation of a process executing as user called "ANONYMOUS" seen used by the "MileStone2016" variant of COLDSTEEL
COLDSTEEL RAT Cleanup Command Execution
Detects the creation of a "rundll32" process from the ColdSteel persistence service to initiate the cleanup command by calling one of its own exports. This functionality is not present in "MileStone2017" and some "MileStone2016" samples
COLDSTEEL RAT Service Persistence Execution
Detects the creation of an "svchost" process with specific command line flags, that were seen present and used by ColdSteel RAT
DarkGate - Autoit3.EXE Execution Parameters
Detects execution of the legitimate Autoit3 utility from a suspicious parent process. AutoIt3.exe is used within the DarkGate infection chain to execute shellcode that performs process injection and connects to the DarkGate command-and-control server.
DarkGate - User Created Via Net.EXE
Detects creation of local users via the net.exe command with the name of "DarkGate"
Griffon Malware Attack Pattern
Detects process execution patterns related to Griffon malware as reported by Kaspersky
Injected Browser Process Spawning Rundll32 - GuLoader Activity
Detects the execution of installed GuLoader malware on the host. GuLoader is initiating network connections via the rundll32.exe process that is spawned via a browser parent(injected) process.
IcedID Malware Suspicious Single Digit DLL Execution Via Rundll32
Detects RunDLL32.exe executing a single digit DLL named "1.dll" with the export function "DllRegisterServer". This behaviour was often seen used by malware and especially IcedID
Potential Pikabot Infection - Suspicious Command Combinations Via Cmd.EXE
Detects the execution of concatenated commands via "cmd.exe". Pikabot often executes a combination of multiple commands via the command handler "cmd /c" in order to download and execute additional payloads. Commands such as "curl", "wget" in order to download extra payloads. "ping" and "timeout" are abused to introduce delays in the command execution and "Rundll32" is also used to execute malicious DLL files. In the observed Pikabot infections, a combination of the commands described above are used to orchestrate the download and execution of malicious DLL files.
Potential Pikabot Discovery Activity
Detects system discovery activity carried out by Pikabot, such as incl. network, user info and domain groups. The malware Pikabot has been seen to use this technique as part of its C2-botnet registration with a short collection time frame (less than 1 minute).
Potential Pikabot Hollowing Activity
Detects the execution of rundll32 that leads to the invocation of legitimate Windows binaries. The malware Pikabot has been seen to use this technique for process hollowing through hard-coded Windows binaries
Pikabot Fake DLL Extension Execution Via Rundll32.EXE
Detects specific process tree behavior linked to "rundll32" executions, wherein the associated DLL lacks a common ".dll" extension, often signaling potential Pikabot activity.
Qakbot Regsvr32 Calc Pattern
Detects a specific command line of "regsvr32" where the "calc" keyword is used in conjunction with the "/s" flag. This behavior is often seen used by Qakbot
Potential Qakbot Rundll32 Execution
Detects specific process tree behavior of a "rundll32" execution often linked with potential Qakbot activity.
Qakbot Rundll32 Exports Execution
Detects specific process tree behavior of a "rundll32" execution with exports linked with Qakbot activity.