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Consultants are warning of a brand new malware marketing campaign that makes use of confidential info stolen from a financial institution as lure to unfold the BitRAT distant entry Trojan.

Qualys consultants detected a brand new malware marketing campaign spreading a distant entry Trojan referred to as BitRAT utilizing confidential info stolen from a financial institution as a lure in phishing messages.

BitRAT is a comparatively new risk marketed on boards and underground markets since February 2021, it’s supplied for $20. The RAT helps the next capabilities:

  1. information exfiltration
  2. Execution of payloads with bypass.
  3. DDoS
  4. keylogger
  5. Webcam and microphone recording
  6. credential theft
  7. Monero mining
  8. Execute duties for processes, information, software program, and so on.

Whereas investigating a number of lures for BitRAT, the researchers found {that a} risk actor had hijacked the IT infrastructure of a Colombian cooperative financial institution and sure gained entry to buyer information.

The attackers then use lures containing delicate financial institution information to trick victims into putting in the malware.

Investigators found that the attackers had entry to a database containing 4,18,777 rows of delicate buyer information, together with cedula (Colombian nationwide identification) numbers, electronic mail addresses, telephone numbers, buyer names, information cost, wage, tackle, and so on.

The risk actors exported the info into malicious weaponized Excel paperwork and used it in phishing emails designed to trick recipients into opening the file. lure victims into opening suspicious Excel attachments.

Opening the file and enabling the macro downloads and executes a second-stage DLL payload. The second stage DLL makes use of varied anti-debugging methods, recovers and runs BitRAT on the compromised host.

BitRAT Bank Data Lure

“Excel accommodates a extremely obfuscated macro that can throw an inf payload and execute it. The .inf payload is segmented into a whole lot of arrays within the macro. The deobfuscate routine performs arithmetic operations on these arrays to rebuild the payload. The macro then writes the payload to temp and runs it by advpack.dll. Learn the evaluation revealed by the consultants. “The .inf file accommodates a hex encoded second stage dll payload that’s decoded by way of certutil, written to %temp% and executed by way of rundll32. Then the momentary information are deleted.

The obfuscated BitRAT loader samples had been hosted on a GitHub repository that was created in mid-November 2022.

BitRAT loader samples are obfuscated by way of DeepSea. Consultants reported that the BitRAT sampler is embedded in loaders and is obfuscated by way of SmartAssembly. The loader decodes the binary and reflexively masses it.

“Industrial prepared to make use of. RATs have been evolving their methodology to unfold and infect their victims.” concludes the report. “They’ve additionally elevated their use of professional infrastructure to host their payloads and defenders must account for that.”

Comply with me on twitter: @safetyissues Y Fb Y Mastodon

Pierluigi Paganini

(Safety Points piracy, BitRAT)







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BitRAT campaign relies on stolen sensitive bank data as a lureSecurity Affairs

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