IP Address: 123.131.217.37Previously Malicious

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IP Address:
123.131.217.37​
Previously Malicious

This IP address attempted an attack on a machine protected by Guardicore Centra

Threat Information

Role

Attacker

Services Targeted

RDP

Tags

System File Modification Service Start Service Deletion System Shutdown Access Share DNS Query Service Configuration Known Malware Successful RDP Login Execute from Share Service Creation Post Reboot Rename Download and Execute RDP Morto Service Stop Access Suspicious Domain

Connect Back Servers

ms.jifr.net flt1.jifr.net ms.jifr.co.be ms.jifr.info ms.jifr.co.cc

Basic Information

IP Address

123.131.217.37

Domain

-

ISP

China Unicom Shandong

Country

China

WHOIS

Created Date

-

Updated Date

-

Organization

-

First seen in Guardicore Centra

2019-02-14

Last seen in Guardicore Centra

2019-02-14

What is Guardicore Centra
Guardicore Centra is a data center and cloud security solution that protects the organization's core assets, using flexible, quickly deployed and easy to understand micro-segmentation controls. Centra generates in-context security incidents, with details on attacker tools and techniques, that help IR teams prioritize incident investigation and reduce dwell time. Learn More

Attack Flow

A user logged in using RDP with the following credentials: administrator / **** - Authentication policy: White List

Successful RDP Login

a.dll was loaded from the remote share \\tsclient\a by c:\windows\system32\rundll32.exe

Execute from Share

System file c:\windows\clb.dllbak was modified 25 times

System File Modification

c:\windows\regedit.exe installed and started c:\windows\temp\ntshrui.dll as a service named Ias under service group netsvcs

Service Creation Service Start

c:\windows\regedit.exe installed c:\windows\system32\sens32.dll as a service named SENS under service group netsvcs

Service Creation

The file C:\WINDOWS\Temp\ntshrui.dll was downloaded and loaded by c:\windows\system32\svchost.exe

Download and Execute

Process netsvcs Service Group attempted to access suspicious domains: flt1.jifr.net, ms.jifr.co.be, ms.jifr.info and ms.jifr.net

Access Suspicious Domain DNS Query

Service Ias was stopped

Service Stop

c:\windows\offline web pages\cache.txt was renamed to c:\windows\system32\sens32.dll by c:\windows\system32\svchost.exe ( pending reboot )

Post Reboot Rename

Process netsvcs Service Group attempted to access domains: ms.jifr.co.cc

DNS Query

Process netsvcs Service Group generated outgoing network traffic to: 74.125.71.104:80

c:\windows\system32\rundll32.exe attempted shutdown of type Shut down all processes running in the logon session of the process with reason: Unspecified

System Shutdown

Connection was closed due to timeout

Associated Files

C:\WINDOWS\Temp\ntshrui.dll

SHA256: d8a5b2a35882291303ea0c823d6cd8240298b0e7d1ca9ac7140692ec1808413e

6672 bytes

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IP Address: 123.131.217.37​Previously Malicious