Researchers said, “The recent update to AZORult includes substantial upgrades to malware that was already well-established in both the email and web-based threat landscapes.”
Attackers have made use of the password-protected documents keeping in mind the end goal to avoid the antivirus detections. Once the client enters the password for documents, it requests to enable macros which thusly download the AZORult, and at that point it connects with the C&C server from the already infected machine and the C&C server responds with the XOR-encoded 3-byte key.
Finally after exfiltrating stolen credentials from the infected machine, it additionally downloads the Hermes 2.1 ransomware.
Security analysts from Proofpoint even recognized the new version (3.2) of AZORult malware publicized in the underground forum with full changelog.
[+] Added stealing of history from browsers (except IE and Edge)
[+] Added support for cryptocurrency wallets: Exodus, Jaxx, Mist, Ethereum, Electrum, Electrum-LTC
[+] Improved loader. Now supports unlimited links. In the admin panel, you can specify the rules for how the loader works. For example: if there are cookies or saved passwords from mysite.com, then download and run the file link[.]Com/soft.exe. Also, there is a rule “If there is data from cryptocurrency wallets” or “for all”
[+] Stealer can now use system proxies. If a proxy is installed on the system, but there is no connection through it, the stealer will try to connect directly (just in case)
[+] Reduced the load in the admin panel.
[+] Added to the admin panel a button for removing “dummies”, i.e. reports without useful information
[+] Added to the admin panel guest statistics
[+] Added to the admin panel a geobase
As indicated by the scientists, the malware campaign contains both the password stealer as well as the ransomware, which is astounding on the grounds that it is not so common to see both. Therefore, before causing a ransomware attack, the stealer would check for cryptocurrency wallets and steal the accreditations before the files are encrypted.