Submission Summary:

• Submission details:
• Submission received: 9 April 2018, 00:20:29
• Processing time: 5 min 56 sec
• Submitted sample:
• File MD5: 0x6478B0CDBF48F55AB1570B4F9A7CCB66
• File SHA-1: 0xDCB9C1E7A99B697373E494545AAFEAED37C980CE
• Filesize: 240,640 bytes
• Alias & packer info:
• Suspicious.MH690 [Symantec]
• Generic BackDoor.yl [McAfee]
• Mal/Behav-024 [Sophos]
• Backdoor:Win32/Fynloski.A [Microsoft]
• Backdoor.Win32.Fynloski [Ikarus]
• packed with: MPRESS [Kaspersky Lab]

• Summary of the findings:

What's been found	Severity Level
Produces outbound traffic.
Modifies some system settings that may have negative impact on overall system security state.
Creates a startup registry entry.

Technical Details:

File System Modifications

• The following file was created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	%Temp%\MSDCSC\msdcsc.exe [file and pathname of the sample #1]	240,640 bytes	MD5: 0x6478B0CDBF48F55AB1570B4F9A7CCB66 SHA-1: 0xDCB9C1E7A99B697373E494545AAFEAED37C980CE	Suspicious.MH690 [Symantec] Generic BackDoor.yl [McAfee] Mal/Behav-024 [Sophos] Backdoor:Win32/Fynloski.A [Microsoft] Backdoor.Win32.Fynloski [Ikarus] packed with MPRESS [Kaspersky Lab]

• Note:
• %Temp% is a variable that refers to the temporary folder in the short path form. By default, this is C:\Documents and Settings\[UserName]\Local Settings\Temp\ (Windows NT/2000/XP).

• The following directories were created:
• %AppData%\dclogs
• %Temp%\MSDCSC

• Notes:
• %AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.

Memory Modifications

• There were new processes created in the system:

Registry Modifications

• The following Registry Keys were created:
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\CurrentVersion
• HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\CurrentVersion\Explorern
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
• HKEY_CURRENT_USER\Software\DC3_FEXEC

• The newly created Registry Values are:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center]
• AntiVirusDisableNotify = "1"
• UpdatesDisableNotify = "1"

to disable notification of firewall, antivirus and/or update status through the Windows Security Center

• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\CurrentVersion\Explorern]
• NoControlPanel = "1"
• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System]
• EnableLUA = 0x00000000
• [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]
• MicroUpdate = "%Temp%\MSDCSC\msdcsc.exe"

so that msdcsc.exe runs every time Windows starts

• The following Registry Value was deleted:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center]
• AntiVirusDisableNotify = 0x00000001
• UpdatesDisableNotify = 0x00000001

• The following Registry Value was modified:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
• Userinit =

Other details

• Analysis of the file resources indicate the following possible country of origin:

	France

• To mark the presence in the system, the following Mutex object was created:
• DC_MUTEX-FN4CCKT

• The following Host Name was requested from a host database:
• darkman244567.ddns.net

• There was registered attempt to establish connection with the remote host. The connection details are:

• There was application-defined hook procedure installed into the hook chain (e.g. to monitor keystrokes). The installed hook is handled by the following module:
• %Temp%\MSDCSC\msdcsc.exe

Outbound traffic (potentially malicious)

• There was an outbound traffic produced on port 1604: