TROJ_UPATRE.MSTF

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 modifies registry entries to disable various system services. This action prevents most of the system functions to be used. It modifies certain registry entries to disable Security Center functions. Doing this allows this malware to execute its routines without being detected. It modifies registry entries to disable the Windows Firewall settings. This action allows this malware to perform its routines without being deteted by the Windows Firewall.

It does not have any propagation routine.

It does not have any backdoor routine.

It deletes the initially executed copy of itself.

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 copies of itself into the affected system:

• %User Temp%\makedopar.exe

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 drops the following files:

• %User Temp%\3780061Log.txt ← contains the initially executed malware path, which is overwritten once it downloads

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)

Other System Modifications

This Trojan modifies registry entries to disable the following system services:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\Services\SharedAccess
Start = "4"

(Note: The default value data of the said registry entry is 2.)

It modifies the following registry entries to disable Security Center functions:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
AntiVirusDisableNotify = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
AntiVirusOverride = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallDisableNotify = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
FirewallOverride = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Security Center
UpdatesDisableNotify = "1"

(Note: The default value data of the said registry entry is 0.)

It modifies the following registry entries to disable the Windows Firewall settings:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
EnableFirewall = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DoNotAllowExceptions = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile
DisableNotifications = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\PublicProfile
EnableFirewall = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\PublicProfile
DoNotAllowExceptions = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\PublicProfile
DisableNotifications = "1"

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile
EnableFirewall = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile
DoNotAllowExceptions = "0"

(Note: The default value data of the said registry entry is 1.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\DomainProfile
DisableNotifications = "1"

(Note: The default value data of the said registry entry is 0.)

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:

• https://{BLOCKED}.{BLOCKED}.83.19/misi12.png
• https://{BLOCKED}.{BLOCKED}.6.123/misi12.png
• https://{BLOCKED}.{BLOCKED}.219.230/misi12.png
• https://{BLOCKED}.{BLOCKED}.153.138/misi12.png
• https://{BLOCKED}.{BLOCKED}.193.145/misi12.png
• https://{BLOCKED}.{BLOCKED}.64.223/misi12.png
• https://{BLOCKED}.{BLOCKED}.102.70/misi12.png
• https://{BLOCKED}.{BLOCKED}.119.204/misi12.png
• https://{BLOCKED}.{BLOCKED}.103.232/misi12.png
• https://{BLOCKED}.{BLOCKED}.100.49/misi12.png
• https://{BLOCKED}.{BLOCKED}.99.183/misi12.png
• https://{BLOCKED}.{BLOCKED}.242.203/misi12.png
• https://{BLOCKED}.{BLOCKED}.30.118/misi12.png
• https://{BLOCKED}.{BLOCKED}.19.168/misi12.png
• https://{BLOCKED}.{BLOCKED}.207.151/misi12.png
• https://{BLOCKED}.{BLOCKED}.211.242/misi12.png

It saves the files it downloads using the following names:

• %User Temp%\3780061Log.txt

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.)

Other Details

This Trojan connects to the following URL(s) to get the affected system's IP address:

• http://icanhazip.com/

It deletes the initially executed copy of itself

NOTES:

It decompresses the downloaded binary code %User Temp%\3780061Log.txt to drop and executes the following file:

• %User Temp%\{random filename}.exe - detected as TSPY_DYRE.OYPA

It connects to the following URL to report infection of the affected system:

• http://{BLOCKED}.{BLOCKED}.4.90:{random port}/MIS12/{Host Name}/0/{OS Version}-{Service Pack}/0/{value}
• http://{BLOCKED}.{BLOCKED}.4.90:{random port}/MIS12/{Host Name}/{value}/{value}/{value}/

It reports the following information of the affected system:

• Computer Name
• OS version
• Service Pack

It stops the following the following Services:

• MpsSvc
• WinDefend

It also install authentication certificates to enable access of download sites.

It does not have rootkit capabilities.

It does not exploit any vulnerability.