TROJ_RAMDO.SM0

May 08, 2014
 Analysis by: Odessy Silva
 ALIASES:

Win32/Ramdo(Microsoft), Trojan.Ramdo(Symantec), Troj/Ramdo-S(Sophos)

 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.

It deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size:

331,776 bytes

File Type:

EXE

Initial Samples Received Date:

31 Mar 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.

Installation

This Trojan drops a copy of itself in the following folders using different file names:

  • %User Startup%\EPUHelp.exe

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

It drops the following component file(s):

  • %AppData%\Adobe\acupx217.dll

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Adobe\
Acrobat Reader\10.0

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Adobe\
Acrobat Reader\10.0\IPM
iTestPropulsion = "{random value}"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{Pseudo-Random Domain}.org

It deletes the initially executed copy of itself