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CostaBricks

CostaBricks is a loader that was used to deploy 32-bit backdoors in the CostaRicto campaign.[1]

ID: S0614
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Type: MALWARE
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Platforms: Windows
Version: 1.0
Created: 24 May 2021
Last Modified: 15 October 2021
Enterprise Layer
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Techniques Used

Domain ID Name Use
Enterprise T1140 Deobfuscate/Decode Files or Information

CostaBricks has the ability to use bytecode to decrypt embedded payloads.[1]
Enterprise T1105 Ingress Tool Transfer

CostaBricks has been used to load SombRAT onto a compromised host.[1]
Enterprise T1027 .001 Obfuscated Files or Information: Binary Padding

CostaBricks has added the entire unobfuscated code of the legitimate open source application Blink to its code.[1]
.002 Obfuscated Files or Information: Software Packing

CostaBricks can implement a custom-built virtual machine mechanism to obfuscate its code.[1]

Groups That Use This Software

ID Name References
G0132 CostaRicto

[1]

References

  1. The BlackBerry Research and Intelligence Team. (2020, November 12). The CostaRicto Campaign: Cyber-Espionage Outsourced. Retrieved May 24, 2021.