Obfuscated JavaScript or Nothing, (Thu, Apr 9th)
Summary
A phishing email contained a RAR archive with a JavaScript file named 'cbmjlzan.JS'. This file has a SHA256 hash of a8ba9ba93b4509a86e3d7dd40fd0652c2743e32277760c5f7942b788b74c5285 and is only detected as malicious by 15 out of many antivirus engines on VirusTotal.
IFF Assessment
The article describes a potentially evasive malicious JavaScript delivered via phishing, indicating a new or low-detection threat that could bypass security controls.
Defender Context
Defenders should be aware of obfuscated JavaScript delivered through common archive formats like RAR, as these can be used to bypass basic signature-based detection. Monitoring for unusual script files within email attachments and employing more advanced behavioral analysis techniques are crucial for mitigating such threats.