However, while the malware used in these new attacks uses similar infection mechanisms to PlugX, it is a completely new tool with its own specific behavior patterns and architecture. We have named this tool “BBSRAT. Targeting and Infrastructure . As described in earlier reports on “Roaming Tiger”, the attack observed in August 2015 used weaponized exploit documents that leave Russian language decoy document files after infecting the system. Figure 2 confirms that the decoy document that opens after the malware infects the system is indeed a list of international exhibitions that were conducted on Russian territory in 2015. Analysis of the command and control (C2) infrastructure shows that the newly discovered samples of BBSRAT used the same C2 domains as previously published in the “Roaming Tiger” campaign, including transactiona[.]com and futuresgold[.]com. This may indicate that for the newer attack campaign using BBSRAT, the adversary may have deployed purpose-built variants and/or infrastructure for each of the intended targets. As we can see, the second command is specifically crafted to run on 64-bit versions of Microsoft Windows. Every subsequent request made by BBSRAT increments this counter by one. The following commands and sub-commands have been identified: Please refer to the appendix for a full list of identified BBSRAT samples and their associated C2 servers. Despite the fact that the information about these attackers has been public for over a year, including a listing of many of the command and control servers, they continue to reuse much of their exposed playbook