Sigma Rules
3,731 rules found
Potential COLDSTEEL Persistence Service DLL Creation
Detects the creation of a file in a specific location and with a specific name related to COLDSTEEL RAT
Potential COLDSTEEL Persistence Service DLL Load
Detects a suspicious DLL load by an "svchost" process based on location and name that might be related to ColdSteel RAT. This DLL location and name has been seen used by ColdSteel as the service DLL for its persistence mechanism
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
Potential COLDSTEEL RAT Windows User Creation
Detects creation of a new user profile with a specific username, seen being used by some variants of the COLDSTEEL RAT.
COLDSTEEL Persistence Service Creation
Detects the creation of new services potentially related to COLDSTEEL RAT
DarkGate - Autoit3.EXE File Creation By Uncommon Process
Detects the usage of curl.exe, KeyScramblerLogon, or other non-standard/suspicious processes used to create Autoit3.exe. This activity has been associated with DarkGate malware, which uses Autoit3.exe to execute shellcode that performs process injection and connects to the DarkGate command-and-control server. Curl, KeyScramblerLogon, and these other processes consitute non-standard and suspicious ways to retrieve the Autoit3 executable.
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"
Potential SocGholish Second Stage C2 DNS Query
Detects a DNS query initiated from a "wscript" process for domains matching a specific pattern that was seen being used by SocGholish for its Command and Control traffic
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 C2 Activity
Detects the execution of rundll32 that leads to an external network connection. The malware Pikabot has been seen to use this technique to initiate C2-communication through hard-coded Windows binaries.
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.
Qakbot Rundll32 Fake DLL Extension Execution
Detects specific process tree behavior of a "rundll32" execution where the DLL doesn't have the ".dll" extension. This is often linked with potential Qakbot activity.
Qakbot Uninstaller Execution
Detects the execution of the Qakbot uninstaller file mentioned in the USAO-CDCA document on the disruption of the Qakbot malware and botnet
Rhadamanthys Stealer Module Launch Via Rundll32.EXE
Detects the use of Rundll32 to launch an NSIS module that serves as the main stealer capability of Rhadamanthys infostealer, as observed in reports and samples in early 2023
Rorschach Ransomware Execution Activity
Detects Rorschach ransomware execution activity
SNAKE Malware Kernel Driver File Indicator
Detects SNAKE malware kernel driver file indicator
SNAKE Malware Installer Name Indicators
Detects filename indicators associated with the SNAKE malware as reported by CISA in their report
SNAKE Malware WerFault Persistence File Creation
Detects the creation of a file named "WerFault.exe" in the WinSxS directory by a non-system process, which can be indicative of potential SNAKE malware activity
Potential SNAKE Malware Installation CLI Arguments Indicator
Detects a specific command line arguments sequence seen used by SNAKE malware during its installation as described by CISA in their report
Potential SNAKE Malware Installation Binary Indicator
Detects a specific binary name seen used by SNAKE malware during its installation as described by CISA in their report
Potential SNAKE Malware Persistence Service Execution
Detects a specific child/parent process relationship indicative of a "WerFault" process running from the "WinSxS" as a service. This could be indicative of potential SNAKE malware activity as reported by CISA.
SNAKE Malware Covert Store Registry Key
Detects any registry event that targets the key 'SECURITY\Policy\Secrets\n' which is a key related to SNAKE malware as described by CISA
Potential Encrypted Registry Blob Related To SNAKE Malware
Detects the creation of a registry value in the ".wav\OpenWithProgIds" key with an uncommon name. This could be related to SNAKE Malware as reported by CISA
SNAKE Malware Service Persistence
Detects the creation of a service named "WerFaultSvc" which seems to be used by the SNAKE malware as a persistence mechanism as described by CISA in their report
Ursnif Redirection Of Discovery Commands
Detects the redirection of Ursnif discovery commands as part of the initial execution of the malware.
Potential Compromised 3CXDesktopApp Beaconing Activity - DNS
Detects potential beaconing activity to domains related to 3CX 3CXDesktopApp compromise
Malicious DLL Load By Compromised 3CXDesktopApp
Detects DLL load activity of known compromised DLLs used in by the compromised 3CXDesktopApp
Potential Compromised 3CXDesktopApp Beaconing Activity - Netcon
Detects potential beaconing activity to domains related to 3CX 3CXDesktopApp compromise
Potential Compromised 3CXDesktopApp Execution
Detects execution of known compromised version of 3CXDesktopApp
Potential Suspicious Child Process Of 3CXDesktopApp
Detects potential suspicious child processes of "3CXDesktopApp.exe". Which could be related to the 3CXDesktopApp supply chain compromise
Potential Compromised 3CXDesktopApp Update Activity
Detects the 3CXDesktopApp updater downloading a known compromised version of the 3CXDesktopApp software
Potential Compromised 3CXDesktopApp Beaconing Activity - Proxy
Detects potential beaconing activity to domains related to 3CX 3CXDesktopApp compromise
Potential Compromised 3CXDesktopApp ICO C2 File Download
Detects potential malicious .ICO files download from a compromised 3CXDesktopApp via web requests to the the malicious Github repository
DLL Names Used By SVR For GraphicalProton Backdoor
Hunts known SVR-specific DLL names.
Scheduled Tasks Names Used By SVR For GraphicalProton Backdoor
Hunts for known SVR-specific scheduled task names
Scheduled Tasks Names Used By SVR For GraphicalProton Backdoor - Task Scheduler
Hunts for known SVR-specific scheduled task names
Diamond Sleet APT DNS Communication Indicators
Detects DNS queries related to Diamond Sleet APT activity