Rewterz Threat Advisory – Nanocore Rat – Active IOCs

Severity

Medium

Analysis Summary

The NanoCore remote access Trojan (RAT) was first discovered in 2013 when it was being sold in underground forums. The malware has a variety of functions such as a keylogger, a password stealer which can remotely pass along data to the malware operator. It also has the ability to tamper and view footage from webcams, screen locking, downloading and theft of files, and more.The current NanoCore RAT is now being spread through malspam campaign which utilizes social engineering in which the email contains a fake bank payment receipt and request for quotation. The emails also contain malicious attachments with .img or .iso extension. The .img and .iso files are used by disk image files to store raw dumps of either magnetic disk or optical disc. Another version of NanoCore is also distributed in phishing campaigns leveraging specially- crafted ZIP files which is designed to bypass secure email gateways. The malicious ZIP file can be extracted by certain versions of PowerArchiver, WinRar, and older 7-Zip. The stolen information is sent to the command and control (C&C) servers of the malware attacker.

Impact

• Credential Theft
• Exposure of Sensitive Data
• Unauthorized Access

Indicators of Compromise

MD5

• 5f97822c466dab774b1cee4dbbf97e64
• 2672767af63aebc51372eda0aefce6de

SHA-256

• d4228833f29af5fc0cebe084ae93518f48c4f1829d7d3e35e1cc70df87d4b3c7
• e4438fe55ad506189992ed8bfa402449106e5c7d0ae3adcd19047e42691fabd5

SHA-1

• 28b1a7ca049c169e0eff73667e6bc8fef3860479
• 716b293ed6d5e5a21ad2b278fcdc4a86bdf4f64f

Remediation

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