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TrojanDropper:Win32/Latot.A

First posted on 08 October 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanDropper:Win32/Latot.A.

Explanation :

Threat behavior

Installation
This threat can create files on your PC, including:

• \ghoo119.exe
• \perfc009.dat
• \perfh009.dat
• \rvmsv.exe
• \winnetsc.exe

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



Payload


Installs malware or unwanted software

This trojan can install other malware or unwanted software onto your PC.



Connects to a remote host

We have seen this threat connect to a remote host. 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:

• \...\Installing
• LOADPERF_MUTEX

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 0cc95116763d1de2615a84f7c8de649e6d85dd7c.

Symptoms

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

• You see a file similar to:
  • \ghoo119.exe
  • \perfc009.dat
  • \perfh009.dat
  • \rvmsv.exe
  • \winnetsc.exe

• You see registry modifications such as:
  
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\NetStateCheck
    Sets value: "Type"
    With data: "0x00000110"
    
    
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\WmiApRpl\Performance
    Sets value: "First Counter"
    With data: "0x00001e2a"
    
    
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\WmiApRpl\Performance
    Sets value: "First Help"
    With data: "0x00001e2b"
    
    
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\WmiApRpl\Performance
    Sets value: "Last Counter"
    With data: "0x00001ed0"
    
    
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\WmiApRpl\Performance
    Sets value: "Last Help"
    With data: "0x00001ed1"
    
    
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\WmiApRpl\Performance
    Sets value: "Object List"
    With data: "7722 7728 7738 7748 7768 7812 7822 7860 7866 7882"
    
    
  • In subkey: HKLM\SYSTEM\CurrentControlSet\Services\WmiApRpl\Performance
    Sets value: "PerfIniFile"
    With data: "wmiaprpl.ini"
    
    

• You see the following mutex:
  • \...\Installing
  • LOADPERF_MUTEX

Last update 08 October 2015

 

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