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Severity
High
Analysis Summary
Rhino Ransomware is one of the latest in ransomware analyzed by researchers. The ransomware carries several capabilities including, disabling services, hindering backup recovery, deleting shadow copies, and persistence. The first step of infection disables several Windows Security and Defender services, as well as Windows Update service, and error reporting. Additionally, the ransomware attempts to stop Microsoft Exchange, sqlserver, and sqlwriter. Stopping these services leads the researchers to believe the targeted victims could be businesses. The next step is the deleting of shadow copies and the backup catalog, as well as Windows Recovery Mode. Persistence is achieved through a registry entry and copying itself to the %AppData% directory as mshtop32bit.exe. After file encryption, a file marker “Marvel01 is added. An email address is included in the ransom email note. Excluded file types are .EXE, .SYS, .LNK, .DLL, .MSI, and the ransomware’s notes.
Impact
File encryption
Indicators of Compromise
MD5
40583ed8bee94ff6b29a35e941089d54
SHA-256
8af0d99cef6fb1d040083ff8934f9a7ce01f358ca796b3c60087a2ebf6335c83
SHA1
1402b9c544092ee911d0638c0dfde51790a6708c
Remediation
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Search for IOCs in your respective environment.