Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
8 followers9,573 downloads10,240 copies160 likes55,485 views
8,655 detections
Filters
Last updated
All Time
Detection languages
5,827
1,081
677
439
436
Categories
2,646
2,040
1,304
944
814
Platforms
5,999
954
874
706
593
Products / Services
2,800
1,372
1,362
725
707
MITRE Techniques
2,087
2,043
1,442
1,092
1,085
CVEs
17
16
15
11
11
IDS Classtypes
250
132
95
68
64
IDS Protocols
405
140
49
36
14
This rule detects suspicious execution of rundll32.exe by looking for multiple instances of rundll32.exe executing with command lines containing both '.dll' and '/' characters from the same computer and account. This pattern can indicate an adversary attempting to proxy execution of malicious code via rundll32.exe.
Detects suspicious modifications to Registry Run and RunOnce keys that include common scripting or command execution keywords (powershell, cmd, .bat). This activity is often associated with persistence mechanisms where adversaries attempt to execute malicious code upon user login.
Detects suspicious process execution patterns involving PowerShell with encoded commands or CMD with command execution flags. The rule looks for multiple occurrences of these patterns from the same computer and account within a one-hour window, which could indicate malicious activity such as script execution or obfuscated command execution.
Detects suspicious execution of wmic.exe where the command line contains keywords often associated with enumeration or manipulation of processes and services. This can indicate an adversary using WMI for discovery or execution.
Detects instances where a significant number of files (50 or more) are deleted on a device within a 5-minute window. This can indicate malicious activity such as ransomware, data destruction, or an attacker attempting to cover their tracks.
This rule detects suspicious DLL injection activity by identifying multiple DLL loads from unusual folders such as 'Temp', 'AppData', or 'Windows\Temp'. Adversaries often drop malicious DLLs into these directories and then inject them into legitimate processes to achieve persistence, privilege escalation, or defense evasion. The rule counts the number of DLL loads from these suspicious locations by the same initiating process on the same device, triggering an alert if five or more such loads occur, indicating a concerted malicious effort.
Detects when a user executes more than 3 commands via the Windows Run dialog, as indicated by entries in the 'Explorer\RunMRU' registry key. This activity could be indicative of an attacker performing reconnaissance or executing multiple commands, or it could be a legitimate power user or administrator activity.
This rule detects potential data poisoning attacks targeting machine learning models by monitoring Windows Security Event ID 4688 (a process was created) for command-line activity containing keywords indicative of model training or dataset modification, combined with terms suggesting malicious intent like 'corrupted', 'poison', or 'injection'. It aims to identify attempts to manipulate or compromise ML models through their training data.
This rule detects potential 'reply-all' storm attacks or malicious mass emails sent to large distribution lists within the organization. It identifies emails sent to 50 or more recipients where the subject line contains phrases like 'reply all' or 'all members', originating from an internal company domain. The rule then counts such broadcast emails within one-hour bins to identify unusual activity.
This rule detects network connections where the User-Agent or RequestClientApplication header contains "NSIS_InetLoad". This string is often associated with Nullsoft Scriptable Install System (NSIS) installers, which can be used by legitimate software but also by malware to download additional components or communicate with command and control servers. The rule specifically looks for at least 3 such connections from the same source to the same destination within the aggregated timeframe, while excluding connections to Microsoft domains to reduce false positives.
Page 847 of 866