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Backdoor:MSIL/Bladabindi.BG

First posted on 12 June 2015.
Source: Microsoft

Aliases :

There are no other names known for Backdoor:MSIL/Bladabindi.BG.

Explanation :

Threat behavior

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

• %TEMP% \dllhost.exe
• %APPDATA% \microsoft\windows\start menu\programs\startup\dd74b0d2a090b9c7b09a797be9b4abbb.exe

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: "dd74b0d2a090b9c7b09a797be9b4abbb"
With data: ""%TEMP%\dllhost.exe" .."

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



Payload


Allows backdoor access and control

This threat can give a malicious hacker access and control of your PC. They can then perform a number of different actions, such as:

• Deleting files
• Downloading and running files
• Logging your keystrokes or stealing your sensitive data
• Modifying your system settings
• Running or stopping applications
• Spreading malware to other PCs
• Uploading files

Connects to a remote host

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

• m7mdal7rbe.no-ip.biz using port 1177

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:

• dd74b0d2a090b9c7b09a797be9b4abbb

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 7c879f7bdeb905709b7bfe5008164a8fd7257b07.

Symptoms

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

• You see a file similar to:
  • %TEMP%\dllhost.exe
  • %APPDATA%\microsoft\windows\start menu\programs\startup\dd74b0d2a090b9c7b09a797be9b4abbb.exe

• You see registry modifications such as:
  
  • In subkey: HKLM\System\CurrentControlSet\Services\LanmanServer\Linkage
    Sets value: "Bind"
    With data: "\device\smb_tcpip_{f5ad825a-8d50-4deb-b719-77b07218011f}"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\LanmanWorkstation\Linkage
    Sets value: "Bind"
    With data: "\device\smb_tcpip_{f5ad825a-8d50-4deb-b719-77b07218011f}"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\Ndis\IfTypes\131
    Sets value: "IfType"
    With data: "131"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\NetBios\Linkage
    Sets value: "LanaMap"
    With data: ".............................."
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\NetBIOS\Parameters
    Sets value: "MaxLana"
    With data: "29"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\NetBT\Linkage
    Sets value: "Bind"
    With data: "\device\tcpip_{f5ad825a-8d50-4deb-b719-77b07218011f}"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\Smb\Linkage
    Sets value: "Bind"
    With data: "\device\tcpip_{f5ad825a-8d50-4deb-b719-77b07218011f}"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\Tcpip6\Linkage
    Sets value: "Bind"
    With data: "\device\{4ab52583-c8d5-473b-a042-6d0fde9494a1}"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock\Setup Migration\Providers\NetBIOS
    Sets value: "WinSock 1.1 Provider Data"
    With data: "."
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000001
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000002
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000003
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000004
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000005
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000006
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000007
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000008
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000009
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9\Catalog_Entries\000000000010
    Sets value: "PackedCatalogItem"
    With data: "%ytmot\ytm2mwokdl"
    
    
  • In subkey: HKLM\System\CurrentControlSet\Services\WinSock2\Parameters\Protocol_Catalog9
    Sets value: "Num_Catalog_Entries"
    With data: "10"

• You see the following mutex:
• dd74b0d2a090b9c7b09a797be9b4abbb

Last update 12 June 2015

 

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