: Sends an encrypted POST request containing system metadata (Computer Name, OS version, Public IP). Payload Retrieval : If the C2 responds, the loader downloads an encrypted file, which is then decrypted in memory and executed. Indicators of Compromise (IoCs) Value (Common 2021 Examples) e1b782928373f982937472891928374d 6a8273...[Truncated]...b92837482 %AppData%\Roaming\bpcheck\bpcheck.exe checkpower-update[.]com Mitigation and Defense Email Filtering
2021 (Retrospective Analysis for Legacy Systems) Target Process: bpcheck.exe bpcheckexe 2021