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HKTL_DOSER

July 07, 2015
 Modified by: Miguel Carlo Ang
 ALIASES:

HackTool/MSIL.Flooder(Antiy-AVL);SPR/Flooder.f.2(Avira);HackTool:MSIL/FireFlood(Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This hacking tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

85,504 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

04 Jul 2015

Arrival Details

This hacking tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This hacking tool drops the following files:

  • %Temporary Internet Files%\Content.IE5\4DI5Y7AN\uoo[2].js
  • %Temporary Internet Files%\Content.IE5\65AR4NUL\CA7RMJUP.htm

(Note: %Temporary Internet Files% is the Temporary Internet Files folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), and Windows Server 2008; C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), and Windows Server 2012.)

Other Details

This hacking tool connects to the following possibly malicious URL:

  • www.{BLOCKED}s-online.com/usuarios.php?v=fireflood
  • {BLOCKED}c.usuarios-online.com/uoo.js?&v=fireflood
  • {BLOCKED}k.usuarios-online.com/listener.php?_oldDomain=fireflood&_url=about%3Ablank&callback=function(data)%7Bif(data.status%3D%3D'ok')%7Bthis.linkObj.href%3Dthis.baseUrl%2B%20data.id%2B'%2F'%3Bthis.updateCounter(data.domainSessionCount)%3Bif(data.remoteJavaScript)%7Beval(data.remoteJavaScript)%3B%7D%7Delse%7Bthis.updateCounter('%3F')%3B%7D%7D