currently serving 24812 YARA rules and 4766 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_JS_Claude_Code_SSH_Backdoor_Oct26
Detects malicious JavaScript file that establishes and persist a reverse ssh tunnel seen being used in Claude Code VSCode extension compromise
30.10.2026
SUSP_JS_SSH_Backdoor_Oct26
Detects suspicious indicators in JavaScript files used to enable SSH service and for reconnaissance
30.10.2026
LOG_Norma_UA_Oct26
Detects use of Norma, an engine that turns a language model into an autonomous agent. It runs a streaming tool-use loop that lets the model read, execute, and reason its way through a task, while the operator retains control over the prompt, the available tools, and the safety boundary. Norma is not malicious on its own.
28.10.2026
HKTL_ARTEX_Oct26
Detects ARTEX, an autonomous penetration-testing system driven by multi-agent LLMs
28.10.2026
HKTL_ARTEX_Docker_Oct26
Detects ARTEX docker compose file, an autonomous penetration-testing system driven by LLM multi-agents
28.10.2026
PUA_NORMA_Usage_Oct26
Detects use of Norma, an engine that turns a language model into an autonomous agent. It runs a streaming tool-use loop that lets the model read, execute, and reason its way through a task, while the operator retains control over the prompt, the available tools, and the safety boundary. Norma is not malicious on its own.
28.10.2026
MAL_LNX_PHP2SHELL_Exploit_Oct26
Detects PHP2SHELL-VULN-CVE-2026-109618 exploit capability in a Linux executable
26.10.2026
SUSP_VSIX_JS_Script_Dropper_Oct26
Detects dropper in malicious VS Code extensions that writes a JavaScript payload to disk and executes it
26.10.2026
SUSP_PY_Sitecustomize_ArgcGated_Runpy_Loader_Oct26
Detects a Python startup hook that reads the real interpreter argument count through ctypes and starts a sibling payload with runpy
26.10.2026
SUSP_PY_Builtins_Chr_Arithmetic_Obfuscator_Oct26
Detects the multi layer Python crypter around the S5PIVOT backconnect client through its resolver and arithmetic, byte xor and byte shift name decoding
26.10.2026
MAL_PY_S5PIVOT_Backconnect_Client_Oct26
Detects S5PIVOT SOCKS5 backconnect client through its S5BC frame magic, the wire wrapper, the PSK HMAC handshake and the channel message set
26.10.2026
MAL_Miasma_Worm_Oct26
Detects Miasma Worm distributed via NPM and GitHub
26.10.2026
SUSP_JS_XOR_Encoded_Eval_Oct26
Detects the XOR-encoded string 'eval('. A match does not confirm eval usage, since XOR-encoded variants can occur by chance in arbitrary data. Analysts should check whether the surrounding bytes decrypt to meaningful content using the XOR key indicated by the match.
26.10.2026
SUSP_CI_Token_Stealer_Oct26
Detects a credential stealer targeting CI/CD pipeline tokens and secrets
26.10.2026
SUSP_ELF_Process_Check_Oct26
Detects small ELF binaries performing anti-analysis checks via /proc (sandbox, container and debugger detection). Analysts should investigate whether the checks occur alongside networking, persistence or payload-dropping code, which separates evasive malware from benign system utilities.
26.10.2026
MAL_LNX_Rape_Worm_Oct26
Detects presence of the Rape worm on Linux systems. This malicious software propagates and infects Linux systems by exploiting vulnerabilities and achieves persistence
26.10.2026
SUSP_NET_B64_Encoded_Loader_Indicators_Oct26
Detetcs base64 encoded indicators typically found in .NET based malware loaders.
26.10.2026
MAL_TTs_Shellcode_Payload_Oct26
Detetcs TTs shellcode loader, payloads encoded as text transform files. TTs abuses the TextTannsform.exe included with Microsoft Visual Studio to load arbitrary code.
26.10.2026
MAL_Encoded_AsyncRAT_Oct26
Detects encoded variants of AsyncRAT and related malware.
26.10.2026
MAL_Browser_Data_Collector_Oct26
Detects a browser data stealer that collects Chrome browsing history and exfiltrates it to a remote server.
23.10.2026
MAL_CloudHaze_Backdoor_Componenet_Oct26
Detects malicious components of CloudHaze backdoor, which is used to exfiltrate data and execute other malwares
23.10.2026
MAL_CloudHaze_Downloader_Oct26
Detects CloudHaze downloader, which is used to download and execute CloudHaze backdoor
23.10.2026
LOG_SUSP_EXPL_CVE_2026_111497_Oct26
Detects Node.js memory corruption that could be related to Node2Shell exploitation attempts (CVE-2026-111497)
23.10.2026
LOG_NodeJsCrash_Oct26
Detects artifacts related to Node.js memory corruption that could be related to Node2Shell exploitation
23.10.2026
SUSP_PY_Suspicious_Functions_Oct26
Detects Python scripts which contain a suspicious combination of functions
22.10.2026
MAL_RANSOM_Binary_Oct26
Detects indicators found in ransomware samples
22.10.2026
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
HKTL_PS1_Loader_Characteristics_Sep25_2
9
cf68eb0b9f6799bda4b95e1d696faaf96fa390802e2764514740080865ffb1e3
SUSP_Base64_Encoded_Hex_Encoded_Code
7
cc9d1525004cfb6b969b1c05746715b2f7fe73ac1f87a4e49ff557b1e4def09b
SUSP_Base64_Encoded_Hex_Encoded_Code
7
e0e0e776274799b233e7d57dc08f26ee8c1dc0e4ffe4321c21bbb4da16758db7
SUSP_Base64_Encoded_Hex_Encoded_Code
7
3c13f1c8bd386b24b815998c5f0f15b18abc4f677ca6758ddd4aefdb941f7ed8
SUSP_Base64_Encoded_Hex_Encoded_Code
7
a8d4cac0da26df1883eae8807356b35e56aaabd77c889862de628fb97e1d5848
SUSP_Credential_Stealer_Api_Indicators_Aug24
6
3f6a88b7051e68dc35456137613b6978087b9e1d4de983795c967139009b4017
SUSP_HKTL_Hacktool_Strings_Oct21_1
6
3c906b82b69c718de9e9f7d533f6ac5ff9544fea316258f124560f9a4848de97
HKTL_PS1_Loader_Characteristics_Sep25_2
8
bd59db01682fa152f70fe823db4718efbe634af1055eccd8d0942685ad25d3e6
MAL_CloudHaze_Backdoor_Componenet_Oct26
1
1eada33900698de2b046c0488f8bf1a86757751f21801d675ffbbd1db035d94a
SUSP_Credential_Stealer_Api_Indicators_Aug24
6
1d5969f77ad4de23a7ee475a414fd0c161307539be5346b61fa6248b3abf8e64
SUSP_Base64_Encoded_Hex_Encoded_Code
6
4e7dd0d25cdab15d922798a04aa722c263975bba498af43861336515c87c900a
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
7989
Threat Hunting (not subscribable, only in THOR scanner)
6145
APT
5106
Hacktools
4924
Webshells
2417
Exploits
758
Newest Sigma Rules
This table shows the newest additions to the Sigma rule set
Rule
Description
Date
Ref
Info
ARTEX User Agent
Detects ARTEX user agent strings in proxy logs. ARTEX is an autonomous penetration-testing system driven by multi-agent LLMs
28.10.2026
Norma User Agent
Detects Norma user agent strings in proxy logs, an engine that turns a language model into an autonomous agent. It runs a streaming tool-use loop that lets the model read, execute, and reason its way through a task, while the operator retains control over the prompt, the available tools, and the safety boundary. Norma is not malicious on its own.
28.10.2026
AWS Bucket Block Public Access Weakened
Detects the weakening of "Block Public Access" setting of S3 buckets in CloudTrail logs.
Monitoring changes to Block Public Access settings is critical, as attackers may disable these safeguards before exposing a bucket through a public ACL or bucket policy.
21.10.2026
HackTool - GoldenDMSA Execution
Detects execution of GoldenDMSA hacktool used for Directory Service Account manipulation.
19.10.2026
Potential Credential Discovery in Git History
Detects attempts to search git commit history for cloud provider credentials or API keys.
Attackers target git history because secrets that were committed and later removed remain recoverable,
making repositories a valuable source of credentials even after remediation.
Various supply chain attacks have been observed leveraging this technique to steal credentials from CI/CD environments.
19.10.2026
Potential Credential Discovery in Git History Windows
Detects attempts to search git commit history for credentials or API keys.
Attackers target git history because secrets that were committed and later removed remain recoverable,
making repositories a valuable source of credentials even after remediation.
Various supply chain attacks have been observed leveraging this technique to steal credentials from CI/CD environments.
19.10.2026
Cloud Provider Credential Exfiltration Attempt
Detects attempts to exfiltrate cloud provider credentials or API keys via network requests using tools like 'curl' or 'wget'.
Attackers commonly use these tools to send stolen secrets to attacker-controlled infrastructure after gaining initial access.
Various supply chain attacks have been observed leveraging this technique to exfiltrate credentials from CI/CD environments and cloud workloads.
18.10.2026
Cloud Provider Credential Dumping via Grep
Detects attempts to discover cloud provider credentials by directly invoking 'grep' with cloud provider-specific patterns.
Attackers commonly enumerate environment variables after gaining initial access to identify or steal credentials for further
exploitation, such as lateral movement or data exfiltration. Various supply chain attacks have been also seen leveraging this
technique to steal credentials.
18.10.2026
HackTool - Defendnot Installation via PowerShell One-Liner
Detects execution of Defendnot installation via PowerShell one-liner that downloads and executes the Defendnot script from a remote URL.
Defendnot is a hacktool that abuses Microsoft's undocumented WSC API to disable Windows Defender by registering itself as a fake antivirus product.
18.10.2026
Potential HackTool - Defendnot Security Center AV Registry Modification
Detects modification of the Microsoft Security Center AV registry keys, particularly those related with DisplayName, ProductEXE, or ReportingExe.
These keys typically store information about antivirus products installed on the system, which is Windows Defender or third-party antivirus software.
But, if these keys holds unexpected values or are modified in a suspicious manner, it could indicate an attempt to tamper with the security settings of the system.
18.10.2026
Registry Tampering Of Internal Tools Settings
Detects registry modifications that tamper with internal Windows tools settings, commonly used by malware to disable security features or system tools
18.10.2026
HackTool - Defendnot Default Scheduled Task Activity
Detects the default scheduled task activity of the hacktool Defendnot, which is used to disable Windows Defender Security.
It abuses Microsoft's undocumented WSC API to register itself as a fake antivirus product, allowing it to disable Windows Defender.
During installation, Defendnot creates a scheduled task named 'defendnot' with the argument '--from-autorun' for persistence.
18.10.2026
Shell Spawned by Celery Worker Process
Detects a system shell interpreter being spawned directly by a Celery worker process.
This behavior indicates a Python background task execution framework is evaluating raw string input through a shell execution context,
which is highly indicative of successful command or prompt injection exploitation against an LLM agent task.
17.10.2026
Process Masquerading as Kernel Worker Thread
Detects attempts to launch processes with names mimicking a Linux kernel worker thread.
Malware or the attacker uses this to evade detection masquerading as legitimate kernel
worker threads, while hiding its true identity.
16.10.2026
Suspicious Process Name Spoofing as Linux Kernel Thread
Detects a process impersonating a Linux kernel worker thread to evade
process-list inspection. Attackers rename malicious binaries or stage
legitimate LOLBins (e.g. curl, wget) under kernel thread names such as
[kworker/u8:2] to hide execution activity.
16.10.2026
Suspicious Procfs Comm Overwrite Attempt with Kernel Thread Name
Detects attempts to overwrite a process's displayed name in /proc/[pid]/comm
with a kernel worker thread name. Attackers use this technique after launching
a renamed binary or LOLBin (e.g. curl, wget) to retroactively change how the
process appears in monitoring tools, providing a second layer of camouflage
beyond argv[0] spoofing.
16.10.2026
Add Authorized Applications to Microsoft Defender Firewall via Registry
Detects the degradation of the system firewall security by the creation or re-enabling of per-application
exceptions via registry writes to the AuthorizedApplications\List keys under FirewallPolicy, which grants
the targeted executable network access and can be abused by malware to bypass network restrictions.
13.10.2026
Allow Exceptions in Microsoft Defender Firewall via Registry
Detects the degradation of the system firewall security by the DoNotAllowExceptions policy value being
set to 0 (DWORD 0x00000000), which re-enables application and port exceptions in the Microsoft
Defender Firewall and can restore network paths that a hardened profile would block.
13.10.2026
System Binary Copied or Moved to Suspicious Directory
Detects the use of cp or mv to copy or move a system binary into a suspicious writable directory.
Attackers stage LOLBins like curl or wget in memory-backed or world-writable directories
to abuse their functionality while obscuring their origin.
12.10.2026
MSR Kernel Module Loaded with Write Access Enabled
Detects the loading of the 'msr' kernel module with 'allow_writes=on', which grants
userspace write access to CPU Model Specific Registers (MSRs). Attackers abuse this
to disable hardware security mitigations, tamper with CPU microcode behavior, or
as a primitive for Ring 0 exploitation. This behaviour is commonly observed in crypto-mining
malware or advanced persistent threats (APTs).
12.10.2026
Potential Timestomping via Touch Utility
Detects potential timestomping activity that uses a system binary or library
path as the reference file, which is a common timestomping technique on Linux.
Attackers copy timestamps from a trusted system binary onto a malicious file to make
it blend in with legitimate files and evade detection based on creation or modification time.
12.10.2026
Invocation of Obfuscated URL In CommandLine
Detects execution where the command line contains an obfuscated HTTP or HTTPS URL.
Threat actors encode download URLs using a wide range of obfuscation techniques - to evade AMSI and string-based detections.
Any single match is a reliable indicator of deliberate obfuscation.
08.10.2026
Indicator of Obfuscated HTTP/HTTPS URL in PowerShell Script
Detects PowerShell script blocks containing an obfuscated HTTP or HTTPS URL.
Threat actors encode download URLs using a wide range of obfuscation techniques
to evade AMSI and string-based detections. Any single match is a reliable
indicator of deliberate obfuscation.
08.10.2026
PowerShell Dynamic Module Invocation Via ExportedCommands Array Index
Detects PowerShell processes invoked with obfuscated command lines that enumerate Microsoft.PowerShell.Utility
exported commands and invoke cmdlets indirectly by array index. This technique is used to evade
detections that look for explicit strings such as Invoke-RestMethod or Invoke-Expression.
06.10.2026
SELinux Disabling Attempt Indicators
Detects indicators of SELinux disabling via command line arguments. This includes attempts
to modify the SELinux configuration file as well as runtime changes to the SELinux enforcement
mode. This is a common post-exploitation technique to persistently disable SELinux across
reboots, reducing mandatory access control enforcement and evading security controls.
06.10.2026
PowerShell Dynamic Module Invocation Via ExportedCommands Array Index - PS Script
Detects obfuscated PowerShell scripts that enumerate Microsoft.PowerShell.Utility exported commands
and invoke cmdlets indirectly by array index. This can be used to evade detections
that look for explicit strings such as Invoke-RestMethod or Invoke-Expression.
06.10.2026
Shell or Interpreter Executed From Non-Standard Path on Linux
Detects a shell binary executed from a path outside standard system locations.
After gaining initial code execution on a Linux host, threat actors commonly copy
or rename shell binaries (bash, sh, dash) into world-writable directories to masquerade
as legitimate processes to evade detections. In privilege escalation scenarios, the
copied shell is additionally granted the SUID bit via chmod so that subsequent invocations
run as root regardless of the calling user's privileges.
05.10.2026
SUID Bit Set on Shell via Chmod for Privilege Escalation
Detects chmod being used to set the SUID bit on a file, a common post-exploitation
technique for privilege escalation on Linux. After gaining low-privileged code
execution (e.g. as nobody or www-data), attackers copy a shell binary or custom
backdoor to a writable path, set the SUID bit so it executes as root, then invoke
it to obtain a root shell.
05.10.2026
Linux Security Control Disabling Attempt
Detects attempts to forcefully kill Linux mandatory access control frameworks.
Attackers commonly terminate these security services as a post-exploitation step
to reduce visibility and weaken host defences before lateral movement or data exfiltration.
02.10.2026
Suspicious Crontab Pipeline Injection
Detects suspicious crontab pipeline injection patterns where an attacker reads the
existing crontab with crontab -l, appends a malicious entry via echo, and writes it
back using crontab - (stdin mode), as legitimate crontab edits are done
interactively via crontab -e rather than from stdin.
30.09.2026
YARA/SIGMA Rule Count
Rule Type
Community Feed
Nextron Private Feed
Yara
1094
23718
Sigma
3635
1131
Sigma Rules Per Category (Community)
Type
Count
windows / process_creation
1368
windows / registry_set
222
windows / file_event
212
windows / ps_script
169
windows / security
165
linux / process_creation
143
windows / image_load
115
webserver
86
windows / system
74
macos / process_creation
69
aws / cloudtrail
58
proxy
55
linux / auditd
54
windows / network_connection
53
azure / auditlogs
44
windows / registry_event
40
azure / activitylogs
35
windows / ps_module
33
windows / application
32
windows / dns_query
28
windows / process_access
25
opencanary / application
24
okta / okta
22
azure / riskdetection
19
windows / pipe_created
19
azure / signinlogs
18
rpc_firewall / application
17
windows / windefend
17
linux
16
linux / file_event
16
gcp / gcp.audit
16
github / audit
15
bitbucket / audit
14
windows / file_delete
13
m365 / threat_management
13
cisco / aaa
13
windows / create_remote_thread
12
windows / driver_load
10
kubernetes / application / audit
10
windows / registry_delete
10
windows / codeintegrity-operational
10
dns
10
windows / create_stream_hash
9
windows / appxdeployment-server
9
windows / ps_classic_start
9
antivirus
9
windows / msexchange-management
8
windows / firewall-as
8
fortigate / event
7
windows / file_access
7
azure / pim
7
windows / bits-client
7
zeek / smb_files
7
gcp / google_workspace.admin
7
kubernetes / audit
6
windows / dns-client
6
jvm / application
5
zeek / dns
5
linux / network_connection
5
zeek / http
5
zeek / dce_rpc
4
m365 / audit
4
windows / sysmon
4
macos / file_event
4
windows / iis-configuration
4
windows / taskscheduler
4
windows / ntlm
3
linux / sshd
3
windows / registry_add
3
gcp / google_workspace.login
3
windows / wmi_event
3
windows / powershell-classic
3
windows / wmi
2
onelogin / onelogin.events
2
windows / applocker
2
firewall
2
windows / security-mitigations
2
linux / syslog
2
windows / dns-server
2
spring / application
2
apache
2
windows / dns-server-analytic
1
cisco / bgp
1
windows / ldap
1
windows / ps_classic_provider_start
1
windows / printservice-admin
1
database
1
cisco / ldp
1
windows / lsa-server
1
windows / printservice-operational
1
linux / clamav
1
windows / appmodel-runtime
1
django / application
1
linux / auth
1
linux / guacamole
1
windows / openssh
1
fortios / sslvpnd
1
huawei / bgp
1
windows / appxpackaging-om
1
windows / process_tampering
1
cisco / syslog
1
linux / cron
1
juniper / bgp
1
windows / smbserver-connectivity
1
windows / raw_access_thread
1
windows / smbclient-connectivity
1
windows / certificateservicesclient-lifecycle-system
1
windows / file_change
1
nodejs / application
1
paloalto / file_event / globalprotect
1
windows / capi2
1
windows / shell-core
1
paloalto / appliance / globalprotect
1
linux / vsftpd
1
windows / microsoft-servicebus-client
1
windows / file_executable_detected
1
python / application
1
zeek / x509
1
windows / diagnosis-scripted
1
windows / smbclient-security
1
windows / file_rename
1
windows / sysmon_status
1
ruby_on_rails / application
1
m365 / exchange
1
zeek / rdp
1
windows / terminalservices-localsessionmanager
1
m365 / threat_detection
1
zeek / kerberos
1
windows / driver-framework
1
windows
1
windows / sysmon_error
1
sql / application
1
nginx
1
linux / sudo
1
velocity / application
1
cisco / duo
1
Sigma Rules Per Category (Nextron Private Feed)
Type
Count
windows / process_creation
553
windows / registry_set
99
windows / ps_script
96
linux / process_creation
80
windows / file_event
52
windows / image_load
49
windows / security
29
windows / wmi
29
proxy
15
windows / system
13
windows / network_connection
9
windows / registry_event
8
windows / kernel-event-tracing
6
windows / ntfs
5
windows / ps_module
5
windows / dns_query
5
windows / sense
4
windows / pipe_created
4
webserver
4
windows / taskscheduler
4
windows / registry_delete
4
windows / create_remote_thread
4
windows / environment variable / THOR
4
windows / hyper-v-worker
3
windows / driver_load
3
macos / process_creation
3
dns
3
windows / ps_classic_script
3
windows / vhd
3
windows / application-experience
3
linux / file_delete
2
windows / file_access
2
linux / file_event
2
windows / file_delete
2
windows / kernel-shimengine
2
windows / codeintegrity-operational
2
linux / Linux kernel module / THOR
2
windows / smbclient-security
2
windows / process_access
2
windows / windefend
2
windows / bits-client
2
windows / registry-setinformation
1
windows / firewall-as
1
windows / file_rename
1
linux / Unix user / THOR
1
windows / amsi
1
windows / application
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