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Trojan:Win32/Crypi.A

First posted on 03 December 2013.
Source: Microsoft

Aliases :

There are no other names known for Trojan:Win32/Crypi.A.

Explanation :

Threat behavior Trojan:Win32/Crypi.A is a malicious program that is unable to spread of its own accord. It may perform a number of actions of an attacker's choice on an affected computer.

Installation

When it runs, Trojan:Win32/Crypi.A copies itself to <system folder>\frizy.exe. Note: <system folder> refers to a variable location that is determined by the malware by querying the Operating System. The default installation location for the System folder for Windows 2000 and NT is C:\Winnt\System32; and for XP, Vista, and 7 is C:\Windows\System32. The malware modifies the following registry entry so that it runs each time you start your PC:

Adds value: "Update_AV"
With data: "c:\windows\system32\frizy.exe"
To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run The malware creates the following files on your computer:

• c:\documents and settings\administrator\local settings\temp\w7ee.tmp
• c:\documents and settings\administrator\local settings\temp\w7ef.tmp

Payload

Contacts remote host
Trojan:Win32/Crypi.A may contact a remote host at 85.143.166.215 using port 80. Commonly, malware does this to:

• Report a new infection to its author
• Receive configuration or other data
• Download and run files, including updates or other malware
• Receive instruction from a remote hacker
• Upload data taken from your PC

This malware description was produced and published using our automated analysis system's examination of file SHA1 78dc864e322c59ba94f6157604e65f5153475a52.Symptoms

System changes

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

• The presence of the following files:
  
  <system folder>\frizy.exe
  c:\documents and settings\administrator\local settings\temp\w7ee.tmp
  c:\documents and settings\administrator\local settings\temp\w7ef.tmp

• You see these entries or keys in your registry:
  
  Adds value: "Update_AV"
  With data: "c:\windows\system32\frizy.exe"
  To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Last update 03 December 2013

 

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