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TROJ_DLOADER.YYKY

April 30, 2014
 Analysis by: Odessy Silva
 ALIASES:

TrojanDownloader:Win32/Upatre.B (Microsoft), Trojan-Ransom.Win32.PornoAsset.clwz (Kaspersky), RDN/Downloader.a!ps (McAfee)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


This Trojan 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:

95,084 bytes

File Type:

EXE

Initial Samples Received Date:

28 Apr 2014

Arrival Details

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

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\{Random 10 Characters}
License = "dword:0000d594"

HKEY_LOCAL_MACHINE\SOFTWARE\{Random 10 Characters}
License = "dword:0000d594"

HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}-mun.com/libs11.56/ajax
  • http://{BLOCKED}bel.com/b/shoe/{number}
  • http://{BLOCKED}-mun.com/libs11.56/jquery