Severity
High
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 TheftUnauthorized AccessTheft of Sensitive InformationFile manipulationRemote command executionKeylogger
Indicators of Compromise
MD5
1ea95595f303fb17be17261db7f1664b22ac18e335309b69e2fb038278e14da86f3d3aa0154d1cf56ffa79164484111c72150cf6f2f7157f3e90801cf9dedb0786f1beb3e7b96aabd772ded24a748e66a976d46490f4a90f39623d4be9e6a4a1eff125471aa1220d8c37b64942de8b7f
SHA-256
e9c4a144deb1483f4edc2af3ba374c764285b92330789609f86821a7a10ea2bc4e2a31d854b37aa44ae33c062e8877117f54988e8ed81c535612c1cf13f09810b0d3ac937d0e9a52366fac09e78baa1c0b244476bc84949146094f6d035221c357cf94df08299565cbb786176e3d1bc4a4b9f16ce12af02dc2ac62d67809e54c4e9e2c41ff2460da83543aeb49e72d75c02bdb962e0454a7ee1d6304b0d23be17108d4253409f66f60a12693c4f014a7e6eda540db5d15d55988b4b31f1b4e9f6929211005bc0cfd3a5edcbc17838cbd8cf51675a59659ec3636c6f8d6019f69
SHA-1
b57a39427240985a469325fe9fcd2f086c5400e1dc2254c9fb58d1482528af87cea54ba0851a3f65187538e3a43b94b222d345434f1558e863929163108ccf9fe74715de7f204082f1cfde94b2f20e57c26fb398eabbd80acd40df5141d8ece79bef5e88eaf0b9186d518c539ddfc04611245733a0824ccb0e65c9bc601ec683f7ae390962e4ca0f50147cc4
Remediation
Block all threat indicators at your respective controls.Search for IOCs in your environment.
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