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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
- Unauthorized Access
- Theft of Sensitive Information
- File manipulation
- Remote command execution
- Keylogger
Indicators of Compromise
MD5
- 056365c74e40381e7f291eb4d5a9a243
- f855ae4d03888ddf904118eac4d0bed2
- b73e2822b5d3627bded9cf69c8d72ad2
SHA-256
- cc5f03883d2ef8ebbce7bbb4889577d87007332c78701184ddae5768edf2d517
- 391d8a8c9229c3adfb47e84a0ad37d62e1d27593a91f73381d609bcb0a99ae9f
- e5399dab77ba2ed72dd552db92b7cc0066142e017d82c8de1f0dcbfc21fec24f
SHA-1
- 01bb8aa5dc4a4b59e2523bae86c2d9b479abcf6a
- 909c2e0cd1b86292b4aa33320a54894cc48c1947
- e9df5a4305b3db19be6a0f1c6572a01614e96a7c
Remediation
- Block all threat indicators at your respective controls.
- Search for IOCs in your environment.