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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 the 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
- c2a38ab7f1bea50d6515f94ce1479b2e
- 7bd6659bf389c4d0bf8a0b090018b2dd
- f21fe012be738f9abae398aaf86ad590
- 304ea97fbce33796d67b40f05d1e3b87
SHA-256
- a21be6089931a548bc0c789f88ce9aae8c4e536fd6def6c8f7e2017d41a8d75f
- 8c9c9e2be3ff95e11500bec023c6d21b8d0a7540adb1dfc690fe69991e7efe58
- 4f525befa02ffeb5f89996e1927e9a8e395e9af63890429f56a0d69b98890370
- 76d13b1a6e1b48296fdcddcf02a20cf0a91c6965de75fda73cadb7fb2d6a06a8
SHA-1
- 553e2a3c6156cbc10c375ac5fbc15dda392a0a3f
- 77c4cea0b469e56e21f77544d1bfa104b6e04fbe
- 50e6c52487af35d80959c3fe634b49b2abfa6bf7
- 9d08b9db7faee101dd349fc3eb74c9f32ba254b7
Remediation
- Block all threat indicators at your respective controls.
- Search for IOCs in your environment.