Adair Collins
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Detects suspicious behavior where a Node.js-based application, potentially EvilAi malware, launches cmd.exe to query MachineGuid from the registry or system model via PowerShell. This activity indicates potential fingerprinting or persistence activity, often originating from the \AppData\Local\Programs\ directory with medium integrity.
Detects suspicious behavior where a Node.js-based application launches cmd.exe to query MachineGuid from the registry, indicating potential fingerprinting or persistence activity by EvilAi malware. The rule specifically looks for processes initiated from a suspicious folder path, where node.exe is the parent process, and cmd.exe is used to query 'HKLM\Software\Microsoft\Cryptography' for 'MachineGuid'.
This rule detects suspicious process activity originating from Windows Server Update Services (WSUS) processes (wsusservice.exe or w3wp.exe with 'wsuspool' in its command line) that then execute known Living Off The Land Binaries (LOLBINs) associated with ingress tool transfer (T1105) or common Windows execution binaries such as cmd.exe, powershell.exe, or certutil.exe. This behavior could indicate the exploitation of a Remote Code Execution vulnerability in WSUS, such as CVE-2025-59287.
Vidar is a sophisticated infostealer operating as Malware-as-a-Service (MaaS). Written in C++, it’s designed to harvest a wide range of sensitive data from infected systems and exfiltrate it to attacker controlled infrastructure.
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
Vidar is a sophisticated infostealer operating as Malware-as-a-Service (MaaS). Written in C++, it’s designed to harvest a wide range of sensitive data from infected systems and exfiltrate it to attacker controlled infrastructure.
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
Vidar is a sophisticated infostealer operating as Malware-as-a-Service (MaaS). Written in C++, it’s designed to harvest a wide range of sensitive data from infected systems and exfiltrate it to attacker controlled infrastructure.
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
Vidar is a sophisticated infostealer operating as Malware-as-a-Service (MaaS). Written in C++, it’s designed to harvest a wide range of sensitive data from infected systems and exfiltrate it to attacker controlled infrastructure.
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
🧬 Script Inception: PowerShell scripts nested within PowerShell scripts, layered with 2–3 rounds of Base64 encoding.
📦 RAR Payloads: Password protected RAR files downloaded via direct-to-IP HTTP requests over TCP port 80. Passwords are embedded in encoded scripts and passed via command line to a downloaded copy of "unrar.exe".
This rule detects the creation or modification of ASPX/ASP files within specific SharePoint web server directories on devices identified as vulnerable to CVE-2025-49706 or CVE-2025-53770. It leverages vulnerability management data to narrow down the scope to only vulnerable SharePoint servers, then monitors file events in common SharePoint LAYOUTS paths for web shell indicators. The rule also uses file profiling to identify potentially novel or malicious ASPX/ASP files that lack Defender visibility.
Detects Windows systems invoking rundll32.exe to execute DLLs associated with compromised npm package versions of eslint-config-prettier (10.1.6–10.1.9). These versions were published without corresponding GitHub commits and may initiate callbacks to FirebaseDotSu, indicating potential command-and-control activity.
Rundll32.exe is a built-in Windows utility that enables execution of DLL files by invoking specific functions exported from them. While it is used legitimately across various system operations, attackers frequently exploit it to execute malicious code because it is a trusted binary and less likely to trigger security alerts. This technique is recognized in the MITRE ATT and CK framework under the identifier T1218.011 as a method for defense evasion.
In typical usage scenarios, Node.js operates as a JavaScript runtime for developing applications and executing server-side scripts. It does not ordinarily engage with DLL files or initiate their execution through rundll32.exe.. When Node.js is observed invoking rundll32 to launch a DLL, this represents highly unusual behavior and may signal a compromise or malware deployment. Such activity warrants investigation, especially when linked to suspicious network callbacks or unverified software packages distributed through npm.
In typical usage scenarios, Node.js operates as a JavaScript runtime for developing applications and executing server-side scripts. It does not ordinarily engage with DLL files or initiate their execution through rundll32.exe.. When Node.js is observed invoking rundll32 to launch a DLL, this represents highly unusual behavior and may signal a compromise or malware deployment. Such activity warrants investigation, especially when linked to suspicious network callbacks or unverified software packages distributed through npm.