Operation WildPressure – APT Hackers Launching new C++ RAT cvvunionws, abcstoresu

WildPressure, a new APT(Advanced persistent threat) group targets organizations in the Middle East to distribute Milum RAT and to take control of the infected device.
The Milum RAT was first spotted in a campaign by Kaspersky researchers in August 2019, the RAT was written in C++. The new campaign doesn’t share any similarities with the old one.
The hacker group targets industrial sectors in the Middle East starting from May 2019, the Milum RAT spreading mechanism was still unknown.
The application get’s installed in the machine as an invisible toolbar window, the primary function is to create a separate thread for communication.
By decoding its configuration data Milum gets the following parameters such as “clientid” and “encrypt_key” to use in RC4 encryption.
The C2 communication protocol is over HTTP and it has the malware version– 1.0.1. Which indicates it is at the early stages of development.
The RC4 algorithm is the only encryption algorithm used with different 64-byte keys based on the victim.
Following are the command handlers in Milum’s code
Based on the C2 domains(upiserversys1212[.]com) analysis the majority of the visitor’s IP is from the Middle East.
To launch the campaign attackers rented virtual private servers (VPS) from OVH and registered domains with Proxy anonymization service.
The targeted nature seems to be clear, but the targeting itself might be limited by our visibility, researchers concluded.
WildPressure appears to be a new group and their operation found to be unique and it doesn’t share any similarities with other malware campaigns.
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