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TROJ_DLOADR.BRH

July 11, 2013
 Analysis by: Rika Joi Gregorio
 ALIASES:

W32/Genome.DNDX!tr.dldr(Fortinet), Trojan-Downloader.Win32.Genome(Ikarus)

 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:

  • 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.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

92,672 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

10 Jul 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}\log.txt

Download Routine

This Trojan saves the files it downloads using the following names:

  • {malware path}\df567758a3-759e-473e-bf8f-521544385652.exe

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://check.{BLOCKED}ject.org/

It attempts to access the following websites to download files, which are possibly malicious:

  • http://{BLOCKED}.{BLOCKED}.187.72/manager/relay.jsp?dd=http://80.255.2.28/DL/Installer.exe