Ankit Mehta
@SecvynIndiaTrusted contributorCompletionist
7 followers9,573 downloads10,249 copies160 likes55,599 views
8,655 detections
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This rule detects potential reconnaissance activity by monitoring for the execution of multiple system enumeration utilities (ipconfig, systeminfo, tasklist, net, whoami, nslookup) on the same device within a short 30-minute window. A threshold of 4 or more distinct tools triggered by the same device is used to identify suspicious behavior indicative of an attacker profiling a newly compromised host.
This rule detects potential persistence mechanism installation by monitoring the creation of registry values in 'Run' or 'RunOnce' keys, followed by the execution of 'powershell.exe' or 'wscript.exe' on the same host within a 5-minute window.
Detects command-line execution patterns associated with the BumbleBee malware loader, specifically looking for process names like 'secur.exe', 'secure.exe', 'update.exe', or the string 'bumblebee' within the command line arguments.
This rule monitors file system events for the creation of files with common web shell names (e.g., shell.php, cmd.php) within known web server directory paths (e.g., wwwroot, inetpub). The detection of these specific file names in directories typically used for serving web content is a strong indicator of a potential web shell deployment.
Detects outbound network connections to URLs containing strings associated with Qakbot (Qbot) malware infrastructure and common ports used by the malware for command-and-control communication.
Detects the execution of known remote access tools (e.g., AnyDesk, TeamViewer, RemotePC, IDriveRemotePC) from non-standard parent processes. This helps identify unauthorized or potentially malicious use of remote control software that bypasses standard application deployment or management processes.
Detects the creation of executable files (.exe, .com, .scr, .vbs, .js) that contain financial-themed keywords (e.g., GST, NEFT, RTGS, IMPS, Banking) in their filename. This pattern is commonly used in social engineering and phishing attacks to trick users into executing malicious payloads disguised as legitimate banking or financial documents.
This rule detects potential ransomware lateral movement patterns by correlating specific network connection attempts (SMB/RDP/RPC) with the observed creation of files having the '.prinzeugen' extension on the same host within a 2-hour window. This behavior is indicative of a ransomware strain propagating across the network and performing encryption.
Detects instances of common, sensitive Windows system binaries (svchost.exe, lsass.exe, sms.exe, csrss.exe) being executed by parent processes other than the legitimate system processes (services.exe, smss.exe, csrss.exe, winlogon.exe), indicating potential process masquerading or path spoofing.
Detects potential ransomware activity characterized by the creation of files with a specific extension (.prinzeugen) followed by outbound network communication to known malicious IP addresses within a 24-hour window, which is indicative of double-extortion ransomware behavior.
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