currently serving 24321 YARA rules and 4650 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_USP_Backdoor_Jul26
Detects USP, a Linux backdoor using a udev rule that triggers the execution of a specified payload (binary or script)
13.07.2026
MAL_ELF_Backdoor_Jul26
Detects an ELF Linux backdoor seen in the wild in combination with the USP backdooring method
13.07.2026
HKTL_VeeamDumper_Jul26
VeeamDumper, a credential extraction hacktool for Veeam Backup & Replication and Veeam One
13.07.2026
MAL_P3_Loader_Jul26
Detects p3-loader, a loader that implements a code injection technique which leverages the Process Parameters structure as an execution and staging location for shellcode injection into remote processes, without triggering common detection mechanisms.
13.07.2026
LOG_ANYDESK_Trace_Login_IP_Jul26
Detects AnyDesk trace log entries that record the client IP address of an incoming session for analyst review and correlation.
12.07.2026
SUSP_JS_Obfuscated_Script_Element_FromCharCode_Jul26
Detects JavaScript that reconstructs the string 'script' using String.fromCharCode, potentially concealing dynamic script element creation and remote payload loading
11.07.2026
SUSP_Dynamic_Script_SRC_FromCharCode_Jul26
Detects JavaScript that assigns a script source from a String.fromCharCode-decoded value, a technique used to conceal remotely loaded JavaScript
11.07.2026
SUSP_PHP_Extract_POST_Dynamic_Call_Webshell_Jul26
Detects PHP web-shell code that overwrite variables and enable attacker-controlled dynamic function invocation
11.07.2026
HKTL_Defender_Killer_Jul26
Detects a POC defender killer that is used to kill processes by abusing Microsoft own driver
10.07.2026
SUSP_OBFUSC_NET_Constant_Encryption_Jul26
Detects .NET constant encryption obfuscation. It is used by malware and legitimate software alike. Further analysis is advised.
08.07.2026
MAL_APT_Cavern_Agent_Jul26
Detects side-loaded uxtheme.dll seen being used within Cavern Manticore C2 framework
08.07.2026
MAL_APT_Cavern_Communication_Module_Jul26
Detects communication module seen being used within Cavern Manticore C2 framework build with .NET NativeAOT
08.07.2026
MAL_APT_Cavern_File_Manager_Module_Jul26
Detects file manager module seen being used within Cavern Manticore C2 framework
08.07.2026
MAL_APT_Cavern_Active_Directory_Module_Jul26
Detects LDAP active directory module seen being used within Cavern Manticore C2 framework
08.07.2026
MAL_APT_Cavern_Database_Browser_Module_Jul26
Detects SQL database browser module seen being used within Cavern Manticore C2 framework
08.07.2026
MAL_APT_Cavern_Network_Recon_Module_Jul26
Detects network reconnaissance module seen being used within Cavern Manticore C2 framework build with .NET NativeAOT
08.07.2026
MAL_APT_Cavern_Socket_Tunnel_Module_Jul26
Detects socket tunnel module seen being used within Cavern Manticore C2 framework build with .NET NativeAOT
08.07.2026
MAL_Cavern_Manticore_Jul26
Detects characteristics seen being used within Cavern Manticore C2 framework
08.07.2026
MAL_GoLang_Vidar_Loader_Jul26
Detects golang loader observed in recent Vidar/StealC delivery campaigns.
08.07.2026
MAL_NjRat_Jul26
Detects NjRat malware variant
08.07.2026
SUSP_NET_Keylogger_Indicators_Jul26
Detects suspicious .NET keylogger indicators
08.07.2026
SUSP_NET_Reactor_Code_Encryption_Jul26
Detects .NET Reactor code encryption pattern in combination with suspicious imports. A match does not prove maliciousness, but is a strong indicator for obfuscation and code encryption.
07.07.2026
MAL_NET_XWorm_Jul26
Detects a .NET XWorm variant
07.07.2026
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_EtwEventWrite_Import_Aug21_1
5
7a7aaa3958ca753f1b89bec73af866c0d8457dcdf5519a46f548eda27b011f04
SUSP_Antivirus_Process_Names_Nov22_1
11
72ffe37a5342461ce6ab192c223845afd61ae23ab50d605a5b25ce06e578d628
SUSP_PowerShell_Disable_MicrosoftDefender_Features_Jan22_1
1
dfef69435f4ab822eef100480a00a75b9d3c85939ef3201393370dc3a6010d8b
SUSP_EtwEventWrite_Import_Aug21_1
1
a03520728824e10b6b4cfc2a4c25b4534e3b5ba2d0d486deb760ee0c875d5a0d
PUA_ConnectWise_ScreenConnect_Mar23
9
8e4c45bfe4bee2802d93a55e0828fb3e63a71c932882232995abc140ceaf549a
SUSP_EtwEventWrite_Import_Aug21_1
1
b34b7dcbf69e60a335d828469a00e082cfab44d1bc04ef6bfa087f4b90d9dd4c
PUA_ConnectWise_ScreenConnect_Mar23
13
1b19345668ef47ee28f85468af7cce26db4f86fc5b96cc8e7ca3fd301ff5e54b
PUA_ConnectWise_ScreenConnect_Mar23
9
33ae02364b330c6cebb74f0668ec5990d06a0d174527648bd3f5454df3a2b451
SUSP_SC_STOP_Windows_Defender_Jan22
9
55cbbfdf03c25421f1975d038405e3a1f9107ee1dcaef598da550f7e7b1e82f1
SUSP_Commands_Disabling_Windows_Defender_Service_Jul23
9
55cbbfdf03c25421f1975d038405e3a1f9107ee1dcaef598da550f7e7b1e82f1
SUSP_Commands_Disabling_Windows_Firewall_Jul23
9
55cbbfdf03c25421f1975d038405e3a1f9107ee1dcaef598da550f7e7b1e82f1
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
7750
Threat Hunting (not subscribable, only in THOR scanner)
5964
APT
5078
Hacktools
4886
Webshells
2404
Exploits
743
Newest Sigma Rules
This table shows the newest additions to the Sigma rule set
Rule
Description
Date
Ref
Info
SQL Server Query Output to File via OSQL.EXE
Detects SQL Server queries that output results to a file using the OSQL utility.
This might indicate potential attempts to save sensitive data for exfiltration or for later analysis during post-exploitation activities.
Even though this could be executed in legitimate contexts, this warrants immediate investigation.
05.07.2026
VirtualBox Binary Masquerading
Detects execution of binaries using VirtualBox-related filenames which are not the legitimate VirtualBox binaries.
This may indicate an attempt to masquerade malicious binaries as VirtualBox components to evade detection.
05.07.2026
VMware Binary Masquerading
Detects execution of binaries using VMware-related filenames but are not the legitimate VMware binaries. This may indicate an attempt to masquerade malicious binaries as VMware components to evade detection.
05.07.2026
Environment Variable Enumeration Via WMIC
Detects enumeration of environment variables via WMIC using the Win32_Environment class.
Attackers query "environment get name,variablevalue" during host reconnaissance to discover
paths, usernames, and configuration values useful for lateral movement or payload staging.
01.07.2026
User Account Password Property Manipulation Via WMIC
Detects manipulation of password-related properties on user accounts via WMIC against
the Win32_UserAccount class. This covers direct password changes as well as policy
modifications such as disabling password expiry or preventing password changes,
all common persistence techniques to maintain access to a backdoor account.
01.07.2026
File or Directory Enumeration Via WMIC
Detects file or directory enumeration via WMIC using the Win32_Directory or CIM_DataFile classes.
Attackers use these classes to list directories or files on specific drives (e.g., "C:")
during post-exploitation reconnaissance - a technique that bypasses traditional dir /ls command monitoring.
01.07.2026
Network Configuration Enumeration Via WMIC NicConfig
Detects enumeration of network interface configuration via WMIC using the "nicconfig" or "nic"
aliases. Attackers commonly query NIC configuration during post-exploitation reconnaissance to
discover IP addresses, MAC addresses, default gateways, and DNS servers — information used to
map the network and pivot to additional targets.
01.07.2026
Startup Item Enumeration Via WMIC
Detects enumeration of startup items via WMIC using the Win32_StartupCommand class.
Attackers query startup items to discover persistence mechanisms that automatically execute
malicious binaries or scripts during system boot or user logon.
01.07.2026
Suspicious Print Processor Driver Registry Modification
Detects modifications to Windows Print Processor Driver registry values where the configured DLL is not
the default winprint.dll. This may indicate abuse of Print Processors for persistence or privilege
escalation, as used by malware such as SprySOCKS.
26.06.2026
SOCKS Proxy Tunneling Invocation
Detects processes that invoke SOCKS proxy tunneling via command-line arguments.
Threat actors abuse SOCKS-capable tools such as chisel, revsocks,
or custom SSH tunnelers to establish covert C2 channels or bypass network controls.
23.06.2026
PowerShell Enumeration of Claude Code Chat History
Detects PowerShell scripts enumerating or reading files within the Claude Code conversation history directory.
Claude Code stores conversation history as JSONL files under: %USERPROFILE%\.claude\projects\<hash>\<session>.jsonl
Threat actors extract these files and apply regex matching to locate high-value secrets (cloud tokens, private keys,
database passwords) before pivoting to infrastructure such as ESXi hosts via harvested SSH credentials.
11.06.2026
PowerShell One-Liner Credential Pattern Search
Detects PowerShell or pwsh one-liners whose command line combines a regex or string-matching primitive with
common credential-related keywords. It might indicate an attempt of credential harvesting across local files,
including config files, source code, chat history, etc. looking for secrets such as API keys, tokens,
passwords, or SSH keys.
11.06.2026
PowerShell One-Liner Targeting Claude Code Chat History
Detects PowerShell one-liners trying to enumerate or read files within the Claude Code conversation history directory.
Claude Code stores conversation history as JSONL files under: %USERPROFILE%\.claude\projects\<hash>\<session>.jsonl
Threat actors extract these files and apply regex matching to locate high-value secrets (cloud tokens, private keys,
database passwords) before pivoting to infrastructure such as ESXi hosts via harvested SSH credentials.
11.06.2026
GitHub Token Access Via GH CLI
Detects the GitHub CLI (gh) being used to retrieve stored authentication tokens.
Malicious packages and scripts have been observed using these commands to silently exfiltrate the victim's stored GitHub authentication token.
08.06.2026
GitLab Token Access Via GLAB CLI
Detects the GitLab CLI (glab) being used to retrieve stored authentication tokens.
Threat actors might access such tokens to gain unauthorized access to GitLab repositories, CI/CD pipelines, and other resources, potentially leading to data exfiltration, code tampering, or further lateral movement within the victim's environment.
08.06.2026
GitLab Token Access Via GLAB CLI - Linux
Detects the GitLab CLI (glab) being used to retrieve stored authentication tokens.
Threat actors might access such tokens to gain unauthorized access to GitLab repositories, CI/CD pipelines, and other resources, potentially leading to data exfiltration, code tampering, or further lateral movement within the victim's environment.
08.06.2026
GitHub Token Access Via GH CLI - Linux
Detects the GitHub CLI (gh) being used to retrieve stored authentication tokens.
Threat actors might access such tokens to gain unauthorized access to GitHub repositories, CI/CD pipelines, and other resources, potentially leading to data exfiltration, code tampering, or further lateral movement within the victim's environment.
08.06.2026
Node or Bun Execution from Suspicious Locations - Linux
Detects the execution of build tools such as bun and node from potentially suspicious locations on Linux systems.
In the recent trend of npm supply chain attacks, Threat Actors have been observed to execute
build tools such as bun and node from locations that are not commonly used for legitimate purposes.
08.06.2026
NPM Package Install Executed From Suspicious Location - Linux
Detects the execution of "npm install" via node on Linux from potentially suspicious directories.
It might indicate a malicious package being installed or executed from a non-standard location.
Attackers might use npm packages to execute malicious code on the victim's machine, potentially
leading to data exfiltration, persistence, or further compromise of the system.
08.06.2026
Node or Bun Execution from Suspicious Locations
Detects the execution of build tools such as bun and node from potentially suspicious locations on Windows systems.
In the recent trend of npm supply chain attacks, Threat Actors have been observed to execute
build tools such as bun and node from locations that are not commonly used for legitimate purposes.
08.06.2026
NPM Package Install Executed From Suspicious Location
Detects the execution of "npm install" via node.exe from potentially suspicious directories on Windows systems.
It might indicate a malicious package being installed or executed from a non-standard location.
Attacker might use npm packages to execute malicious code on the victim's machine, potentially
leading to data exfiltration, persistence, or further compromise of the system.
08.06.2026
NTLM Hash Leak Via Curl NTLM Authentication
Detects the use of curl with NTLM authentication and empty credentials (-u :), which can be abused to leak the currently logged-in user's NTLMv2 challenge-response to an
attacker-controlled server, enabling offline cracking or relay attacks.
When no credentials are provided, the Microsoft-shipped curl passes a NULL identity to Windows SSPI, which automatically falls back to the current user's logon session credentials
stored in LSASS — without requiring a plaintext password.
This behavior is exclusive to the curl binary shipped by Microsoft (available since Windows 10 / Windows Server 2019), which is built with SSPI support.
04.06.2026
Uninstall SystemComponent Registry Value Modification via CommandLine
Detects modification of the "SystemComponent" registry value in the "Uninstall" key through command line.
Attackers modify this value to hide installed applications from "Programs and Features", often as part of persistence or defense evasion techniques.
04.06.2026
Audit Policy Category Discovery via Auditpol.EXE
Detects the use of auditpol.exe to query audit policy to discover which audit categories are enabled on the system.
Attackers may use this information to identify potential gaps in security monitoring and adjust their tactics accordingly.
Since, this require elevated privileges, unless it is being used by the administrator for legitimate purposes, it can be
considered suspicious and warrants immediate attention.
04.06.2026
Hiding of an Installed Application from Application Wizard
Detects the SystemComponent DWORD registry value being set to 1 under an application's Uninstall key,
which removes the application from "Programs and Features" and "Add or Remove Programs" visibility.
Threat actors use this technique to hide installed applications, from normal administrative review,
as part of persistence or defense evasion strategies.
04.06.2026
LSASS Crash Via Netlogon Stack Buffer Overflow - CVE-2026-41089
Detects a crash of the LSASS process where netlogon.dll is the faulting module and the exception code is STATUS_STACK_BUFFER_OVERRUN (0xc0000409).
This crash, especially on Domain Controllers, might indicate the exploitation of CVE-2026-41089, a denial of service (DoS) vulnerability,
which exists in the Netlogon component of Windows and can be triggered by sending specially crafted requests to the Netlogon service,
leading to a stack-based buffer overflow and subsequent crash of the LSASS process.
02.06.2026
System Time Synchronization With Domain Controller via Net.exe
Detects use of net.exe to query and set the local system time from a domain controller.
Attackers may use this to reset system time after deliberate manipulation, to align clocks for Kerberos-based attacks, or to cover traces of time-based tampering.
02.06.2026
Network Sweep via CMD For Loop
Detects a subnet sweep executed via a CMD for loop iterating over an IP range using the (1,1,N) step pattern.
Attackers use this tool-agnostic pattern for network reconnaissance to identify live hosts or enumerate SMB shares across private subnets.
02.06.2026
AMSI Memory Patching via .NET Reflection - PowerShell
Detects suspicious PowerShell script blocks that attempt to patch AMSI's ScanContent method in memory using the Marshal class.
This technique is used by adversaries to bypass AMSI scanning by replacing the ScanContent function under
"System.Management.Automation.AmsiUtils" with an empty or attacker-controlled method.
01.06.2026
YARA/SIGMA Rule Count
Rule Type
Community Feed
Nextron Private Feed
Yara
1703
22618
Sigma
3591
1059
Sigma Rules Per Category (Community)
Type
Count
windows / process_creation
1351
windows / registry_set
219
windows / file_event
209
windows / ps_script
166
windows / security
160
linux / process_creation
139
windows / image_load
114
webserver
82
windows / system
74
macos / process_creation
69
aws / cloudtrail
55
proxy
54
windows / network_connection
53
linux / auditd
53
azure / activitylogs
42
windows / registry_event
40
azure / auditlogs
38
windows / ps_module
33
windows / application
32
windows / dns_query
27
windows / process_access
25
azure / signinlogs
24
opencanary / application
24
okta / okta
22
windows / pipe_created
19
azure / riskdetection
19
rpc_firewall / application
17
windows / windefend
17
linux
16
gcp / gcp.audit
16
github / audit
15
linux / file_event
15
bitbucket / audit
14
m365 / threat_management
13
cisco / aaa
13
windows / file_delete
13
windows / create_remote_thread
12
windows / codeintegrity-operational
10
dns
10
windows / driver_load
10
windows / registry_delete
10
kubernetes / application / audit
10
windows / ps_classic_start
9
windows / appxdeployment-server
9
windows / create_stream_hash
9
windows / firewall-as
8
windows / msexchange-management
8
gcp / google_workspace.admin
7
zeek / smb_files
7
antivirus
7
fortigate / event
7
azure / pim
7
windows / file_access
7
windows / bits-client
7
windows / dns-client
6
kubernetes / audit
6
linux / network_connection
5
zeek / http
5
jvm / application
5
zeek / dns
5
m365 / audit
4
macos / file_event
4
windows / sysmon
4
windows / taskscheduler
4
windows / iis-configuration
4
zeek / dce_rpc
4
linux / sshd
3
gcp / google_workspace.login
3
windows / wmi_event
3
windows / powershell-classic
3
windows / ntlm
3
windows / registry_add
3
linux / syslog
2
windows / dns-server
2
spring / application
2
apache
2
onelogin / onelogin.events
2
firewall
2
windows / security-mitigations
2
windows / raw_access_thread
1
nodejs / application
1
paloalto / appliance / globalprotect
1
zeek / x509
1
windows / certificateservicesclient-lifecycle-system
1
windows / microsoft-servicebus-client
1
python / application
1
windows / shell-core
1
windows / diagnosis-scripted
1
windows / smbclient-security
1
windows / file_executable_detected
1
windows / sysmon_status
1
ruby_on_rails / application
1
m365 / exchange
1
zeek / rdp
1
windows / file_rename
1
windows / sysmon_error
1
sql / application
1
zeek / kerberos
1
m365 / threat_detection
1
windows / driver-framework
1
velocity / application
1
windows / terminalservices-localsessionmanager
1
linux / sudo
1
cisco / duo
1
cisco / ldp
1
nginx
1
windows
1
windows / dns-server-analytic
1
windows / lsa-server
1
windows / wmi
1
windows / ps_classic_provider_start
1
windows / printservice-admin
1
database
1
cisco / bgp
1
windows / ldap
1
django / application
1
windows / printservice-operational
1
linux / clamav
1
linux / auth
1
windows / appmodel-runtime
1
fortios / sslvpnd
1
linux / guacamole
1
juniper / bgp
1
windows / applocker
1
windows / openssh
1
windows / process_tampering
1
cisco / syslog
1
linux / cron
1
windows / appxpackaging-om
1
windows / smbclient-connectivity
1
huawei / bgp
1
windows / smbserver-connectivity
1
paloalto / file_event / globalprotect
1
linux / vsftpd
1
windows / capi2
1
windows / file_change
1
Sigma Rules Per Category (Nextron Private Feed)
Type
Count
windows / process_creation
525
windows / registry_set
93
windows / ps_script
89
linux / process_creation
59
windows / file_event
49
windows / image_load
47
windows / wmi
29
windows / security
29
windows / system
13
proxy
13
windows / network_connection
9
windows / registry_event
8
windows / kernel-event-tracing
6
windows / ps_module
5
windows / dns_query
5
windows / ntfs
5
webserver
4
windows / taskscheduler
4
windows / create_remote_thread
4
windows / registry_delete
4
windows / sense
4
windows / pipe_created
4
windows / ps_classic_script
3
windows / vhd
3
windows / application-experience
3
windows / driver_load
3
windows / hyper-v-worker
3
macos / process_creation
3
dns
3
windows / smbclient-security
2
windows / windefend
2
windows / process_access
2
windows / bits-client
2
windows / codeintegrity-operational
2
windows / file_access
2
linux / file_event
2
windows / kernel-shimengine
2
windows / file_delete
2
linux / Linux kernel module / THOR
2
windows / environment variable / THOR
1
linux / Unix user / THOR
1
windows / amsi
1
windows / posh_ps
1
windows / application
1
windows / firewall-as
1
windows / registry-setinformation
1
linux / file_delete
1
windows / file_rename
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
Scan your endpoints, forensic images or collected files with our portable scanner THOR