currently serving 23640 YARA rules and 4421 Sigma rules
API Key
New Rules per Day
Newest YARA Rules
This table shows the newest additions to the YARA rule set
Rule
Description
Date
Ref
MAL_Voidlink_Implant_Loader_Feb26
Detects Voidlink implants loader, VoidLink is an advanced malware framework made up of custom loaders, implants, rootkits, and modular plugins designed to maintain long-term access to Linux systems
11.02.2026
MAL_Voidlink_Implants_Feb26
Detects Voidlink implants, VoidLink is an advanced malware framework made up of custom loaders, implants, rootkits, and modular plugins designed to maintain long-term access to Linux systems
11.02.2026
MAL_Voidlink_Kernel_Rootkit_Feb26
Detects Voidlink kernel rootkit that provides stealth, persistence, and remote control capabilities.
11.02.2026
SUSP_EXPL_Ivanti_EPMM_Pattern_Feb26
Detects URL pattern indicators found in Ivanti Endpoint Manager Mobile (EPMM) logs that could indicate exploitation of CVE-2026-1281 and CVE-2026-1340
10.02.2026
SUSP_EXPL_Ivanti_EPMM_UserAgent_Feb26
Detects suspicious indicators found in Ivanti Endpoint Manager Mobile (EPMM) logs that could indicate exploitation of CVE-2026-1281 and CVE-2026-1340
10.02.2026
SUSP_URL_Encoded_RevShell_Indicators_Feb26
Detects suspicious URL patterns that could indicate URL-encoded reverse shell attempts, which are often used in web-based attacks to obfuscate malicious commands and evade detection. It could also be a false positive caused by vulnerability scanners or failed exploitation attempts that log the attempted URL in a web server log file.
10.02.2026
SUSP_OBFUSC_Encoded_Base64_Decode_Indicators_Feb26
Detects suspicious base64 encoded base64 decode patterns that could indicate obfuscated commands or scripts attempting to decode and execute hidden payloads, which is a common technique used by attackers to evade detection and analysis.
10.02.2026
PUA_VULN_Driver_NSecKrnl_Feb26
Detects vulnerable NSecKrnl driver used by ransomware to terminate security products and evade detection
10.02.2026
SUSP_WIN_SchTask_QEMU_Port_Fwd_Indicators_Feb26
Detects suspicious scheduled task XML files with QEMU port forwarding indicators, which could be used for malicious purposes such as setting up reverse tunnels or C2 communication channels
09.02.2026
SUSP_B64_Encoded_AppDomainManager_Config_Feb26
Detects Base64 encoded .NET application configuration files used to instantiate the AppDomainManager class
09.02.2026
SUSP_B64_Encoded_AppDomainManager_CS_Feb26
Detects Base64 encoded C# code overwriting the AppDomainManager
09.02.2026
MAL_NET_DesckVB_RAT_RunPE_Feb26
Detects RunPE loader component of DesckVB rat. The loader uses process hollowing to inject abitrary code into a legitimate process.
09.02.2026
SUSP_NPM_SupplyChain_Attack_C2_Feb26
Detects pre- and postinstall scripts in combination with cloud services frequently abused as C2s
09.02.2026
SUSP_NPM_Device_Fingerprinting_Feb26
Detects suspicious device fingerprinting functionality
09.02.2026
SUSP_NPM_Terminal_Output_Persistence_Feb26
Detects suspicious terminal output persistence to bypass NPM buffering
09.02.2026
MAL_Reflective_PE_Loader_Feb26
Detects DarkOthello reflective PE loader DLL that decrypts an embedded payload using a subtraction cipher, decompresses via LZMS, and reflectively loads the PE in-process, as seen being used by MuddyWater APT group
09.02.2026
MAL_LNX_ExfilServer_Feb26
Detects Go-based C2 exfiltration server that receives AES-CTR encrypted stolen data via /signup and /feed HTTP endpoints, decrypts per-client streams using registered keys, and tracks clients via cid cookies, seen being used by MuddyWater APT group
09.02.2026
HKTL_PY_Citrix_NetScaler_Memory_Leak_POC_Feb26
Detetcs Citrix NetScaler Memory Leak POC
09.02.2026
HKTL_PY_OWA_BruteForcer_Feb26
Detects a Python script that attackes OWA by bruteforcing passwords
09.02.2026
HKTL_PY_FortiOS_Authentication_Bypass_POC_Feb26
Detetcs FortiOS Authentication Bypass POC
09.02.2026
APT_MAL_CE_Note_Browser_Stealer_Feb26
Detects CE-Notes browser credential stealer that that steals credentials from chromium-based browsers by copying and querying the sqlite login Data database, decrypting passwords via DPAPI, seen being used by MuddyWater APT group
08.02.2026
HKTL_Unknown_C2_Stager_Feb26
Detects unknown C2 stager
07.02.2026
HKTL_KillEDR_Feb26_1
Detects unknown EDR killer tools
07.02.2026
HKTL_SharpEDRChecker_Feb26_1
Detects Sharp EDR Checker - a tool that checks for the presence of known defensive products such as AV and EDRs
07.02.2026
HKTL_Novel_EDR_Evasion_Feb26
Detects unknown EDR killer tools
07.02.2026
Successful YARA Rules in Set
This table shows statistics of the best rules with lowest AV detection rates (rules created in the last 12 months, matches of the last 14 days)
Rule
Average AV Detection Rate
Sample Count
Info
VT
Latest YARA Matches with Low AV Detection Rate
This table lists the last matches with low AV detection rates (between 0 and 15 AV engines matched)
Rule
AVs
Hash
VT
SUSP_PowerShell_Disable_MicrosoftDefender_Features_Jan22_1
14
910b4458b111ea6e248dd2ee15a464e6dc52fb57eec76ea0838eeb6f226c9cda
MAL_BAT_OBFUSC_BOM_Override_Apr25
12
a38a05c432144e633fe5631318a9dd22d03bc66a75c1492a739b64183581ae23
SUSP_PS1_Execution_Patterns_Feb22_1
2
c1d6432d648b7f5f3e564aa283f3f5a425724a782d0d0ac0478c5144e759595e
MAL_BAT_PowerShell_Launcher_Jan23_1
2
c1d6432d648b7f5f3e564aa283f3f5a425724a782d0d0ac0478c5144e759595e
SUSP_PS1_PowerShell_IEX_Downloaded_Content_Jun21_1
2
c1d6432d648b7f5f3e564aa283f3f5a425724a782d0d0ac0478c5144e759595e
SUSP_MSIL_NET_OBF_ConfuserEx_Constants_Jul23
4
4bfe1ae74f9ddea0c44534995ac8e62245b3afe8a7d58de243640a712b79b675
PUA_ConnectWise_ScreenConnect_Mar23
14
fabe836d3ee59f851853944fc231e8d48aec3c8147b15ecea34e27bfb74de8b8
SUSP_Encoded_PS1_SilentlyContinue_May22
5
9c8281e584803cd7d73b67409a002abecf0b4b6ece7abf65ee83be9f8ba01b43
SUSP_Antivirus_Process_Names_Nov22_1
12
bc2591905b01a9c5bbb262d7079753ce0892a58a9cc51676b279fadb41d292f1
SUSP_MSIL_NET_OBF_ConfuserEx_Constants_Jul23
6
ae90e04322337db295625f125dd9fc590b93da5297292d9dc28a059444bf92f4
PUA_ConnectWise_ScreenConnect_Mar23
10
d66fd4cf6c27e97e676f4fe6935691b3055a29aa03289dc4cb8a1da504d4bbcb
SUSP_MSIL_NET_OBF_ConfuserEx_Constants_Jul23
6
8357ecdf59768007702462d2720aa2ec4599d4931ff72dd8d1eb7a0ce86a68c6
SUSP_MSIL_NET_OBF_ConfuserEx_Constants_Jul23
5
e2512b05eb36075afd1e07c22d3b16d799bd2ddba6256c9f9fa3e2e348a5e474
YARA Rules Per Category
This list shows the number of YARA rules in the subscribable categories (categories overlap as a rule can be in 'n' categories)
Tag
Count
Malware
7454
Threat Hunting (not subscribable, only in THOR scanner)
5782
APT
5050
Hacktools
4813
Webshells
2397
Exploits
715
Newest Sigma Rules
This table shows the newest additions to the Sigma rule set
Rule
Description
Date
Ref
Info
File Operation via .NET Class
Detects the use of dotnet method in command lines which could be used for unauthorized file operations such as copying files.
It could indicate suspicious activity because there are many normal ways to copy files in Windows, thus adversary may use this rarely used method to avoid detection.
06.02.2026
Suspicious Linux Command Patterns
Detects suspicious command line patterns that may indicate malicious activity such as decoding base64 content to files in some folder and executing it.
05.02.2026
Suspicious Download and Execution Combo in Linux
Detect suspicious command line patterns where a download command line utility is executed in combination with other suspicious command line utilities.
This could indicate potential malicious activity such as downloading and various other actions like decoding, changing permissions, or executing the downloaded file or creating persistence.
05.02.2026
Suspicious Double Extension File Execution on Linux
Detects suspicious use of executable extensions like .sh, .py or .pl after a non-executable file extension to disguise malicious files in Linux environments
05.02.2026
Suspicious Double Extension Files in Linux
Detects files with double extensions in Linux systems, which could be an attempt to disguise executable content as harmless documents.
05.02.2026
Suspicious Base64 Encoded IP in Command Line
Detects processes with command lines containing base64-encoded IP addresses, which may indicate obfuscation or evasion attempts.
Threat actors often host their secondary malicious payloads on IP addresses, potentially their C&C servers or other hosting infrastructure.
To download these malicious payloads, the malware dropper technique involves downloading and executing a secondary payload from an IP address.
And to obscure the command line from normal user scrutiny, threat actors may their script or command line arguments in base64 encoding to download and execute the secondary payload.
04.02.2026
Suspicious Base64 Encoded IP in PowerShell Execution
Detects PowerShell script blocks that contain base64-encoded IP addresses, a technique commonly used for obfuscation and defense evasion.
Threat actors may leverage this method to download and execute secondary payloads from IP addresses - often their command and control (C2) servers or other malicious infrastructure.
By encoding these URLs in base64 within PowerShell commands, adversaries attempt to bypass detection mechanisms and evade user scrutiny.
This rule helps identify suspicious activity where PowerShell is used to retrieve content from IPs via base64-encoded strings, which is rarely seen in legitimate software.
04.02.2026
Renamed TinyCC (TCC) Compiler Execution
Detects the execution of a renamed TinyCC (TCC) Compiler (tcc.exe)
Attackers have been observed renaming tcc.exe to masquerade as legitimate Windows binaries (e.g., svchost.exe) to compile and execute malicious C code in memory, such as shellcode loaders.
This technique was observed in Chrysalis backdoor attacks.
03.02.2026
Suspicious Child Process of Notepad++ Updater - GUP.Exe
Detects suspicious child process creation by the Notepad++ updater process (gup.exe).
This could indicate potential exploitation of the updater component to deliver unwanted malware.
03.02.2026
Uncommon File Created by Notepad++ Updater Gup.EXE
Detects when the Notepad++ updater (gup.exe) creates files in suspicious or uncommon locations.
This could indicate potential exploitation of the updater component to deliver unwanted malware or unwarranted files.
03.02.2026
Tiny C Compiler Runtime Execution
Detects execution of Tiny C Compiler (TCC) which compiles and executes C code directly in memory.
This technique was observed in Chrysalis backdoor campaigns where attackers renamed tcc.exe to svchost.exe and used it
to load shellcode from .c files directly into memory, bypassing traditional detection methods.
03.02.2026
Notepad++ Updater DNS Query to Uncommon Domains
Detects when the Notepad++ updater (gup.exe) makes DNS queries to domains that are not part of the known legitimate update infrastructure.
This could indicate potential exploitation of the updater mechanism or suspicious network activity that warrants further investigation.
02.02.2026
CLSID DefaultIcon Value Tampering
Detects potential COM object hijacking. Adversaries have used CLSID DefaultIcon to reference malicious payload, encrypted payloads, or conceal payload execution paths as part of defense-evasion and persistence chains.
31.01.2026
Suspicious PowerShell Execution with Public IPv4
Detects PowerShell making web requests directly to public IPv4 addresses using Invoke-WebRequest or Invoke-RestMethod, which may indicate suspicious activity.
Threat actors may use this technique to download and execute secondary payloads from direct IP addresses, potentially their command and control (C2) servers or other malicious infrastructure.
29.01.2026
Win32_ScheduledJob Class or At.exe Enabled - Registry
Detects the enabling of the Win32_ScheduledJob WMI class or At.exe via registry modification.
The Win32_ScheduledJob class is used to create and manage scheduled jobs in Windows.
This class is disabled by default for security reasons, and enabling it may indicate an attempt to create or manage scheduled jobs in a potentially malicious manner.
29.01.2026
Suspicious Modification of Service ImagePath for ClipUp Defender Evasion
Detects registry modifications that set the ImagePath of a service to execute ClipUp.exe with Protected Process Light (PPL) parameters targeting Windows Defender locations.
This technique is used by attackers to replace the Windows Defender service executable before it initializes, effectively bypassing security protections.
The approach leverages CreateProcessAsPPL.exe to obtain PPL privileges, which normally protect security software from tampering.
29.01.2026
Suspicious File Creation by Clipup in Windows Defender Directory
Detects file creation by Clipup.exe in the Windows Defender program files directory.
ClipUp.exe may be used to overwrite the service executable of Windows Defender, potentially allowing an attacker to disable or manipulate Windows Defender.
29.01.2026
Suspicious PowerShell Execution with Public IPv4 - PowerShell
Detects PowerShell commands or scripts making web requests directly to public IPv4 addresses using `Invoke-WebRequest` or `Invoke-RestMethod`, which may indicate suspicious activity.
Threat actors may use this technique to download and execute secondary payloads from direct IP addresses, potentially their command and control (C2) servers or other malicious infrastructure.
29.01.2026
Windows Defender Critical Binary Deletion
Detects the deletion of critical Windows Defender binaries which could indicate an attempt to disable or manipulate Windows Defender.
29.01.2026
Win32_ScheduledJob Class or At.exe Enabled - Process
Detects the enabling of the Win32_ScheduledJob WMI class or At.exe via registry modification.
The Win32_ScheduledJob class is used to create and manage scheduled jobs in Windows.
This class is disabled by default for security reasons, and enabling it may indicate an attempt to create or manage scheduled jobs in a potentially malicious manner.
29.01.2026
Suspicious ClipUp Execution with Windows Defender Path
Detects suspicious execution of ClipUp.exe with parameters that may indicate an attempt to write to Windows Defender protected locations.
ClipUp.exe may be used to overwrite the service executable of Windows Defender, potentially allowing an attacker to disable or manipulate Windows Defender.
29.01.2026
Windows Defender Folder Invocation Through Short Name
Detects suspicious command line patterns where a process is invoking a path within the Windows Defender folder using its short name (8.3 notation).
This technique may be used to execute or manipulate Windows Defender binaries while evading detection mechanisms that do not account for short path names.
29.01.2026
Suspicious Driver Service Installation
Detects attempts to install a suspicious driver service using the 'sc.exe' command.
It has been observed that adversaries use this technique to install malicious/vulnerable drivers to bypass/disrupt security solutions such as EDRs.
This technique is often used in conjunction with other techniques to establish persistence and maintain control over the compromised system.
27.01.2026
Potentially Suspicious Usage of Win32 ScheduledJob WMI Class
Detects potential abuse of the Win32_ScheduledJob WMI class for creating or removing scheduled jobs.
This WMI class, which is disabled by default for security reasons, manages AT.exe command-based scheduled jobs.
Threat actors can exploit this class to execute malicious code at predetermined times or remove job to evade detection.
The use of this WMI class instead of conventional scheduling methods may indicate suspicious activity.
27.01.2026
Driver Service Configuration Changed to Kernel Mode
Detects attempts to modify driver's service configurations to kernel mode using the 'sc config' command.
An attacker can use sc.exe to change the privileges for a driver, enabling it to run in kernel mode, which is
typically performed by attackers in order to gain deeper system control to disable security services such as antivirus protection.
27.01.2026
Suspicious Driver Service Installation - Security
Detects installations of driver services from unusual directories that may indicate malicious activity.
Adversaries often deploy rogue or compromised drivers to evade security measures (like EDR/AV), obtain kernel-level access, or extract sensitive data like LSASS memory.
This approach has become increasingly prevalent among ransomware operators and malicious actors.
27.01.2026
Suspicious Driver Service Installation - System
Detects driver service installations from suspicious locations, indicating potential malware activity.
Threat actors may install malicious/vulnerable drivers for various purposes, such as to bypass security products (EDR/AV) or gain kernel access to dump lsass etc.
This technique is very commonly used in security product bypass attempts and is nowadays commonly used by ransomware groups/threat actors.
27.01.2026
Potentially Suspicious PyInstaller Executable
Detects execution of potentially suspicious PyInstaller executables that have been packaged with python code which may include malicious payloads.
PyInstaller is a popular tool for packaging Python applications into standalone executables, but it can also be used by adversaries to wrap and obfuscate malicious python code into a single executable file.
27.01.2026
Velociraptor Abuse via Suspicious PowerShell Commands
Detects Velociraptor.exe being abused to execute suspicious PowerShell or command-line activity indicative of post-exploitation behavior.
27.01.2026
YARA/SIGMA Rule Count
Rule Type
Community Feed
Nextron Private Feed
Yara
2720
20920
Sigma
3540
881
Sigma Rules Per Category (Community)
Type
Count
windows / process_creation
1331
windows / registry_set
219
windows / file_event
206
windows / ps_script
165
windows / security
160
linux / process_creation
131
windows / image_load
114
webserver
82
windows / system
74
macos / process_creation
68
aws / cloudtrail
55
proxy
54
linux / auditd
53
windows / network_connection
53
azure / activitylogs
42
windows / registry_event
40
azure / auditlogs
38
windows / ps_module
33
windows / application
31
windows / dns_query
27
windows / process_access
25
azure / signinlogs
24
okta / okta
22
azure / riskdetection
19
opencanary / application
18
windows / pipe_created
18
rpc_firewall / application
17
windows / windefend
16
github / audit
16
linux
16
gcp / gcp.audit
16
bitbucket / audit
14
linux / file_event
13
windows / file_delete
13
m365 / threat_management
13
cisco / aaa
12
windows / create_remote_thread
12
windows / driver_load
10
windows / registry_delete
10
kubernetes / application / audit
10
windows / codeintegrity-operational
10
windows / ps_classic_start
9
dns
9
windows / appxdeployment-server
9
windows / create_stream_hash
9
windows / firewall-as
8
windows / msexchange-management
8
antivirus
7
fortigate / event
7
windows / file_access
7
azure / pim
7
windows / bits-client
7
gcp / google_workspace.admin
7
zeek / smb_files
7
windows / dns-client
6
jvm / application
5
kubernetes / audit
5
zeek / dns
5
linux / network_connection
5
zeek / http
5
windows / taskscheduler
4
windows / iis-configuration
4
zeek / dce_rpc
4
windows / sysmon
4
windows / wmi_event
3
windows / powershell-classic
3
windows / ntlm
3
windows / registry_add
3
linux / sshd
3
m365 / audit
3
macos / file_event
3
spring / application
2
onelogin / onelogin.events
2
firewall
2
linux / syslog
2
windows / security-mitigations
2
windows / dns-server
2
apache
2
linux / sudo
1
velocity / application
1
cisco / duo
1
nginx
1
windows / dns-server-analytic
1
cisco / bgp
1
windows / ldap
1
windows / wmi
1
windows / printservice-admin
1
cisco / ldp
1
windows / ps_classic_provider_start
1
windows / printservice-operational
1
database
1
linux / clamav
1
windows / lsa-server
1
linux / auth
1
linux / guacamole
1
windows / appmodel-runtime
1
django / application
1
fortios / sslvpnd
1
huawei / bgp
1
windows / applocker
1
windows / openssh
1
cisco / syslog
1
linux / cron
1
juniper / bgp
1
windows / appxpackaging-om
1
windows / process_tampering
1
windows / smbclient-connectivity
1
windows / smbserver-connectivity
1
windows / raw_access_thread
1
paloalto / file_event / globalprotect
1
windows / capi2
1
windows / shell-core
1
windows / file_change
1
nodejs / application
1
paloalto / appliance / globalprotect
1
zeek / x509
1
windows / certificateservicesclient-lifecycle-system
1
linux / vsftpd
1
windows / microsoft-servicebus-client
1
windows / file_executable_detected
1
python / application
1
windows / diagnosis-scripted
1
windows / smbclient-security
1
windows / sysmon_error
1
m365 / exchange
1
zeek / rdp
1
windows / file_rename
1
windows / sysmon_status
1
ruby_on_rails / application
1
m365 / threat_detection
1
zeek / kerberos
1
windows / terminalservices-localsessionmanager
1
sql / application
1
windows / driver-framework
1
windows
1
Sigma Rules Per Category (Nextron Private Feed)
Type
Count
windows / process_creation
414
windows / ps_script
81
windows / registry_set
80
windows / image_load
45
windows / file_event
45
linux / process_creation
41
windows / wmi
29
windows / security
25
proxy
12
windows / system
10
windows / network_connection
8
windows / registry_event
8
windows / kernel-event-tracing
6
windows / ntfs
5
windows / ps_module
5
windows / pipe_created
4
windows / sense
4
windows / taskscheduler
4
windows / create_remote_thread
4
windows / registry_delete
4
windows / ps_classic_script
3
webserver
3
windows / vhd
3
windows / application-experience
3
windows / driver_load
3
windows / hyper-v-worker
3
windows / file_delete
2
windows / kernel-shimengine
2
macos / process_creation
2
windows / process_access
2
windows / windefend
2
windows / process-creation
2
windows / bits-client
2
windows / codeintegrity-operational
2
windows / file_access
2
windows / dns_query
2
linux / file_event
2
windows / firewall-as
1
windows / file_rename
1
dns
1
windows / amsi
1
windows / application
1
windows / registry-setinformation
1
windows / audit-cve
1
Tenable Nessus
Requirement: Privileged Scan
- YARA Scanning with Nessus works only when scanning with credentials (privileged scan)
YARA Scanning with Nessus
- You can only upload a single .yar file
- Filesystem scan has to be activated
- You have to define the target locations
- The Nessus plugin ID will be 91990
- Only files with the following extensions can be scanned: .application, .asp, .aspx, .bat, .chm, .class, .cmd, .com, .cp, .csh, .dl, .doc, .docx, .drv, .exe, .gadget, .hta, .inf, .ins, .inx, .isu, .jar, .job, .jpeg, .jpg, .js, .jse, .jse, .jsp, .lnk, .msc, .msi, .msp, .mst, .paf, .pdf, .php, .pif, .ppt, .pptx, .ps1, .ps1xm, .ps2, .ps2xm, .psc1, .psc2, .reg, .rgs, .scf, .scr, .sct, .shb, .shs, .swf, .sys, .u3p, .vb, .vbe, .vbs, .vbscript, .ws, .wsf, .xls, .xls
Carbon Black
Tutorial: https://github.com/carbonblack/cb-yara-connectorFireEye EX
Tutorial: https://www.fireeye.com/blog/products-and-services/2018/12/detect-and-block-email-threats-with-custom-yara-rules.html
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