IP Address: 181.166.215.187Previously Malicious

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IP Address:
181.166.215.187​
Previously Malicious

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

Threat Information

Role

Attacker, Scanner

Services Targeted

RDP

Tags

System File Modification RDP Unhandled Exception Port 3389 Scan Service Creation Service Configuration System Shutdown Access Share Service Stop Successful RDP Login Access Suspicious Domain Service Start Service Deletion Post Reboot Rename DNS Query Persistency - Logon Known Malware Execute from Share Morto

Associated Attack Servers

flt1.jifr.net ms.jifr.co.cc ss.jifr.net ms.jifr.net dos1.jifr.net ms.jifr.co.be ms.jifr.info

Basic Information

IP Address

181.166.215.187

Domain

-

ISP

Telecom Argentina S.A.

Country

Argentina

WHOIS

Created Date

-

Updated Date

-

Organization

-

First seen in Guardicore Centra

2019-07-21

Last seen in Guardicore Centra

2019-11-21

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

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

Service Start Service Creation

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

System File Modification

Process netsvcs Service Group attempted to access suspicious domains: dos1.jifr.net, flt1.jifr.net, ms.jifr.co.be, ms.jifr.info, ms.jifr.net and ss.jifr.net

DNS Query Access Suspicious Domain

Service Ias was stopped

Service Stop

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

Service Creation

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

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

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

DNS Query

Process netsvcs Service Group generated outgoing network traffic to: 192.168.8.10:3389, 192.168.8.11:3389, 192.168.8.12:3389, 192.168.8.13:3389, 192.168.8.14:3389, 192.168.8.15:3389, 192.168.8.16:3389, 192.168.8.17:3389, 192.168.8.18:3389, 192.168.8.19:3389, 192.168.8.1:3389, 192.168.8.20:3389, 192.168.8.21:3389, 192.168.8.22:3389, 192.168.8.23:3389, 192.168.8.24:3389, 192.168.8.25:3389, 192.168.8.26:3389, 192.168.8.2:3389, 192.168.8.3:3389, 192.168.8.4:3389, 192.168.8.5:3389, 192.168.8.6:3389, 192.168.8.7:3389, 192.168.8.8:3389, 192.168.8.9:3389 and 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

Process netsvcs Service Group scanned port 3389 on 26 IP Addresses

Port 3389 Scan

Connection was closed due to timeout

Associated Files

C:\WINDOWS\Temp\ntshrui.dll

SHA256: ba26be526bf1fd437af02281c183c089bc746c698ec1757f38e8da68bcbaca74

6672 bytes

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IP Address: 181.166.215.187​Previously Malicious