PUA.Win32.Tomos.GC

November 13, 2018
 Analysis by: Kiyoshi Obuchi
 ALIASES:

PUA:Win32/Somoto (Microsoft); PUA.BetterInstaller (Symantec)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

201,808 bytes

File Type:

EXE

Initial Samples Received Date:

06 Nov 2018

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This Potentially Unwanted Application adds the following registry entries:

HKEY_CURRENT_USER\Software\Somoto\
SDP
muid = "{Random Characters}"

HKEY_CURRENT_USER\Software\Somoto\
SDP
uid = "{Random Characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
sdp
(Default) = URL:SDP Protocol

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
sdp
URL Protocol =

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
sdp\shell\open\
command
(Default) = "{Malware Filename\Malware File Path}" /protocol %1

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\ProtocolExecute\sdp
WarnOnOpen = 0

HKEY_CURRENT_USER\Software\Somoto\
SDP
nc = {Hex Values}

HKEY_CURRENT_USER\Software\Somoto\
SDP
flags = 4