IP Address: 113.92.94.33Previously Malicious

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IP Address:
113.92.94.33​
Previously Malicious

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

Threat Information

Role

Attacker

Services Targeted

RDP

Tags

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

Connect Back Servers

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

Basic Information

IP Address

113.92.94.33

Domain

-

ISP

China Telecom Guangdong

Country

China

WHOIS

Created Date

-

Updated Date

-

Organization

-

First seen in Guardicore Centra

2019-03-05

Last seen in Guardicore Centra

2019-03-05

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 c:\windows\temp\ntshrui.dll as a service named Ias under service group netsvcs

Service Creation

The file C:\WINDOWS\clb.dll was downloaded and loaded by c:\windows\regedit.exe

Download and Execute

c:\windows\system32\rundll32.exe installed and started c:\windows\temp\ntshrui.dll as a service named Iprip 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

c:\progra~1\common~1\micros~1\dw\dw20.exe set the command line "c:\PROGRA~1\COMMON~1\MICROS~1\DW\dwtrig20.exe" -t to run using Persistency - Logon

Persistency - Logon

c:\windows\system32\rundll32.exe installed c:\windows\system32\ntmssvc32.dll as a service named NtmsSvc under service group None

Service Creation

c:\windows\offline web pages\cache.txt was renamed to c:\windows\system32\ntmssvc32.dll by c:\windows\system32\svchost.exe ( pending reboot )

Post Reboot Rename

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 Iprip was stopped

Service Stop

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: e5838811c6ccd6d15c5909cedfd9727397f1a85384e0cf79da7041baa22e5b23

6672 bytes

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IP Address: 113.92.94.33​Previously Malicious