Analysis by: Rika Joi Gregorio
ALIASES:

Trojan:Win32/Ontonphu.F(Microsoft), a variant of Win32/Flooder.Ramagedos.I trojan(Eset)

 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: 76,800 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 16 Aug 2013

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.

Installation

This Trojan drops the following files:

  • {malware path}\config.dat

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER
inetcomm = "{malware path and file name}"

HKEY_CURRENT_USER
Shell = "Explorer.exe,{malware path and file name}"

HKEY_LOCAL_MACHINE
inetcomm = "{malware path and file name}:*:Enabled:inetcomm"

HKEY_CURRENT_USERS\S-1-5-21-{random digits}
inetcomm = "{malware path and file name}"

HKEY_CURRENT_USERS\S-1-5-21-{random digits}
Shell = "Explorer.exe,{malware path and file name}"

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}deasing.com/par/bfg.php?dll=762811

It saves the files it downloads using the following names:

  • {malware path}\1686540331-.dll