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TrojanDownloader:Win32/Tinub.A


First posted on 30 April 2015.
Source: Microsoft

Aliases :

There are no other names known for TrojanDownloader:Win32/Tinub.A.

Explanation :

Threat behavior

Installation


It can make various registry changes during its installation, including:

In subkey: HKLM\software\classes\clsid\{740f4164-15d4-42b8-8fa2-b0725b1328c3}\localserver32
Sets value: "(default)"
With data: ".exe"

In subkey: HKLM\software\classes\kxahmghcdbtscbt.tbvnmqfasjwp\clsid
Sets value: "(default)"
With data: "{740f4164-15d4-42b8-8fa2-b0725b1328c3}"

In subkey: HKLM\software\classes\typelib\{14dfb228-9716-434b-8442-eff13fd44e6f}\1.0\0\win32
Sets value: "(default)"
With data: ".exe"



Payload


Downloads malware or unwanted software

This threat can download other malware and unwanted software onto your PC.



Connects to a remote host

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

  • host1.sz-guogeng.com using port 7771
  • host2.sz-guogeng.com using port 7771
  • log.dtddn.com using port 80
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


We have seen this threat access online content, including:

  • 10.rar
  • 1.rar
  • 6.rar


Additional information

Creates a mutex

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

  • ScanPK23102
  • SPK2300


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 0e44f875c7f9b1b252ad3a24b49e528d25df7742.

Symptoms

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

  • You see registry modifications such as:
    • In subkey: HKLM\software\classes\clsid\{740f4164-15d4-42b8-8fa2-b0725b1328c3}\localserver32
      Sets value: "(default)"
      With data: ".exe"

    • In subkey: HKLM\software\classes\kxahmghcdbtscbt.tbvnmqfasjwp\clsid
      Sets value: "(default)"
      With data: "{740f4164-15d4-42b8-8fa2-b0725b1328c3}"

    • In subkey: HKLM\software\classes\typelib\{14dfb228-9716-434b-8442-eff13fd44e6f}\1.0\0\win32
      Sets value: "(default)"
      With data: ".exe"

  • You see the following mutex files:
    • ScanPK23102
    • SPK2300

Last update 30 April 2015

 

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