Win32/Tinba [Threat Name] go to Threat

Win32/Tinba.AA [Threat Variant Name]

Category trojan
Size 19968 B
Aliases Trojan:Win32/Tinba.A (Microsoft)
Short description

Win32/Tinba.AA is a trojan that can interfere with the operation of certain applications. The trojan collects information used to access certain sites. The trojan attempts to send gathered information to a remote machine.


When executed, the trojan copies itself into the following location:

  • %allusersprofile%\­Application Data\­default\­bin.exe

In order to be executed on system start, the trojan sets the following Registry entry:

  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Run]
    • "(Default)" = "%allusersprofile%\­Application Data\­default\­bin.exe"

The following Registry entries are set:

  • [HKEY_CURRENT_USER\­Software\­Microsoft\­Windows\­CurrentVersion\­Internet Settings\­Zones\­3]
    • "1609" = 0

The trojan attempts to modify the following file:

  • %appdata%\­Mozilla\­Firefox\­Profiles\­%profile%\­user.js

The trojan writes the following entries to the file:

  • user_pref("security.warn_submit_insecure",false);user_pref("security.warn_viewing_mixed",false);

The trojan creates and runs a new thread with its own program code within the following processes:

  • %system%\­winver.exe
  • explorer.exe
  • iexplore.exe
  • firefox.exe
  • chrome.exe
Information stealing

The trojan acquires data and commands from a remote computer or the Internet.

The trojan collects information used to access the following site:

  • https://*
  • **/ServiceLoginAuth*
  • *facebook.*/login.php*
  • **/cgi/login*

The trojan can modify network traffic.

The trojan collects the following information:

  • disk serial number (without spaces)

The trojan attempts to send gathered information to a remote machine.

Other information

The trojan contains a list of (5) URLs.

It tries to download several files from the addresses.

These are stored in the following locations:

  • %allusersprofile%\­Application Data\­default\­bin.exe
  • %allusersprofile%\­Application Data\­default\­cfg.dat
  • %allusersprofile%\­Application Data\­default\­web.dat

The HTTP protocol is used.

The trojan hooks the following Windows APIs:

  • HttpQueryInfoA (wininet.dll)
  • HttpSendRequestA (wininet.dll)
  • HttpSendRequestW (wininet.dll)
  • InternetCloseHandle (wininet.dll)
  • InternetQueryDataAvailable (wininet.dll)
  • InternetReadFile (wininet.dll)
  • PR_Write (nspr4.dll)
  • PR_Read (nspr4.dll)
  • PR_Close (nspr4.dll)
  • PR_DestroyPollableEvent (nspr4.dll)

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