ROKRAT is Back
2018-09-21 • v3lo •
The source analyzes a Korean HWP malware sample described as similar to earlier ROKRAT activity, with VirusTotal showing the Hangul document as undetected at the time. The infection chain converts shellcode into PE files under the Temp directory, creates WinUpdate148399843.pif, and uses Themida packing followed by thread injection. The injected payload includes anti-debugging and anti-sandbox behavior, including destructive MBR overwrite behavior in a virtual machine environment, and collects host details such as computer name, user name, SMBIOS information, process lists, and screenshots. The malware contains cloud-service API strings for Box, Dropbox, pCloud, and Yandex, suggesting cloud storage was used for command, file transfer, or data handling, although the C2 was dead during analysis. Similar SMBIOS collection, anti-sandbox DLL targeting, packet headers, and function overlap are cited as evidence connecting the sample to ROKRAT-like tradecraft.