SID 1:64589

Rule Category

MALWARE-OTHER --

Alert Message

MALWARE-OTHER Unix.Trojan.Helldown variant upload attempt

Rule Explanation

This rule specifically is looking for a known loader tool used by the Helldown ransomware group to install a backdoor on a targeted firewall.

What To Look For

This rule triggers on a known malicious file upload

Known Usage

Attacks/Scans seen in the wild

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

MITRE::ATT&CK Framework::Enterprise::Execution::User Execution::Malicious File

An adversary may rely upon a user opening a malicious file in order to gain execution. Users may be subjected to social engineering to get them to open a file that will lead to code execution. This user action will typically be observed as follow-on behavior from Spearphishing Attachment. Adversaries may use several types of files that require a user to execute them, including .doc, .pdf, .xls, .rtf, .scr, .exe, .lnk, .pif, and .cpl.

CVE

None

Additional Links

virustotal.com/gui/file/ccd78d3eba6c53959835c6407d81262d3094e8d06bf2712fefa4b04baadd4bfe

Rule Vulnerability

No information provided

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.

None