10 Things I Hate About Attribution: RomCom vs. TransferLoader

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Evento MISP pubblicato con TLP:CLEAR: 10 Things I Hate About Attribution: RomCom vs. TransferLoader. Report from - [URL rimossa] (1745170857) ### Key takeaways * TA829 conducts a mixture of espionage and cybercriminal operations, which rely on services sourced from the criminal underground, and a regularly updated suite of tools built upon the legacy RomCom backdoor. * While tracking TA829, Proofpoint observed a highly similar email campaign and redirection infrastructure set-up. This similar campaign deployed a new loader and backdoor dubbed TransferLoader, which Proofpoint currently attributes to a separate cybercriminal cluster called “UNK\_GreenSec”, rather than TA829. * This blog will show how analysts explored the differences and overlaps between both sets of activity and leave an open-ended question around the relationship between these two clusters within the larger criminal and espionage ecosystem. ### Overview Most of the time, delineating activities from distinct clusters and separating cybercrime from espionage can be done based on differing tactics, techniques, and procedures (TTPs), tooling, volume/scale, and targeting. However, in the case of TA829 and a cluster Proofpoint dubbed “UNK\_GreenSec”, there is more ambiguity. TA829 is a cybercriminal actor that occasionally also conducts espionage aligned with Russian state interests, while UNK\_GreenSec is an unusual cybercriminal cluster. TA829 overlaps with activity tracked by third-parties as RomCom, Void Rabisu,