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DDoS:Win32/Flusihoc.A

First posted on 21 October 2015.
Source: Microsoft

Aliases :

There are no other names known for DDoS:Win32/Flusihoc.A.

Explanation :

Threat behavior

Installation


It modifies the registry so that it runs each time you start your PC. For example:

In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Sets value: "csrss"
With data: "d:\program files\svchost\csrss.exe"
Sets value: "explorer"
With data: "d:\program files\svchost\explorer.exe"
Sets value: "spoolsv"
With data: "d:\program files\svchost\spoolsv.exe"


The malware uses code injection to make it harder to detect and remove. It can inject code into running processes.



Payload
Uses your PC in DDoS attacks

This threat can use your PC to conduct distributed denial of service (DDoS) attacks.

During an attack, your Internet connection might run slower than usual.



Connects to a remote host

We have seen this threat connect to a remote host, including:

• web.dresou.net using port 45678
• fd.dresou.net using port 45678

Malware can connect to a remote host to do any of the following:

• Check for an Internet connection
• Download and run files (including updates or other malware)
• Report a new infection to its author
• Receive configuration or other data
• Receive instructions from a malicious hacker
• Search for your PC location
• Upload information taken from your PC
• Validate a digital certificate

Additional information

Creates a mutex

This threat can create one or more mutexes on your PC. For example:

• csrss
• explorer
• spoolsv
• svchost

It might use this mutex as an infection marker to prevent more than one copy of the threat running on your PC.



This malware description was published using automated analysis of file SHA1 2822c73f355af9f09dbb0137e0be217347aa58ea.

Symptoms

The following can indicate that you have this threat on your PC:

• You see registry modifications such as:
  
  • In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
    Sets value: "csrss"
    With data: "d:\program files\svchost\csrss.exe"
    
    
  • In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
    Sets value: "explorer"
    With data: "d:\program files\svchost\explorer.exe"
    
    
  • In subkey: HKLM\Software\Microsoft\Windows\CurrentVersion\Run
    Sets value: "spoolsv"
    With data: "d:\program files\svchost\spoolsv.exe"
    
    

• You see the following mutex:
  • csrss
  • explorer
  • spoolsv
  • svchost

Last update 21 October 2015

 

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