JUST RELEASED: ATT&CK for Industrial Control Systems
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FlawedGrace

FlawedGrace is a fully featured remote access tool (RAT) written in C++ that was first observed in late 2017.[1]

ID: S0383
Type: MALWARE
Platforms: Windows
Version: 1.0
Created: 29 May 2019
Last Modified: 07 June 2019
Enterprise Layer
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Techniques Used

Domain ID Name Use
Enterprise T1043 Commonly Used Port

FlawedGrace has used port 443 for C2 communications.[1]
Enterprise T1094 Custom Command and Control Protocol

FlawedGrace uses a custom binary protocol for its C2 communications.[1]
Enterprise T1027 Obfuscated Files or Information

FlawedGrace encrypts its C2 configuration files with AES in CBC mode.[1]

Groups That Use This Software

ID Name References
G0092 TA505 [1]

References

  1. Schwarz, D. and Proofpoint Staff. (2019, January 9). ServHelper and FlawedGrace - New malware introduced by TA505. Retrieved May 28, 2019.