Ransom.MSIL.CREEPY.A

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

It drops files as ransom note. It avoids encrypting files with the following file extensions.

Arrival Details

This Ransomware 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 Ransomware drops and executes the following files:

• %Application Data%\guard.exe -> Detected as Ransom.MSIL.CREEPY.A and is used to drop copies of guard.exe and to terminate different processes

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following processes:

• %System%\cmd.exe "/C NetSh Advfirewall set allprofiles state off"

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

It creates the following folders:

• %All Users Profile%\Datas
• %AppDataLocal%\Docs
• %Application Data%\eu29
• %User Temp%\Traces
• %User Temp%\powkdsx

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Autostart Technique

This Ransomware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
creepyranware = {malware full path}

Dropping Routine

This Ransomware drops the following files:

• %All Users Profile%\Datas\guard.exe
• %AppDataLocal%\guard.exe
• %Application Data%\eu29\guard.exe
• %User Temp%\guard.exe
• %User Temp%\powkdsx\guard.exe

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Download Routine

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

• http://{BLOCKED}ware.net/enchandle.php?emails=creepyadmin

Other Details

This Ransomware adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
GDIPlus
FontCachePath = %AppDataLocal%

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = 1

It connects to the following URL(s) to check for an Internet connection:

• www.google.com

It does the following:

• It terminates all processes that contains any of the following strings
  • taskmgr
  • ntrtscan
  • tmccsf
  • tmlisten
  • anydesk
  • teamviewer
  • sae
  • resourcehacker
  • die
  • decompil
  • dissem
  • dnspy
  • simpleassembly
  • ollydbg
  • x32dbg
  • x64dbg
  • de4dot
  • peek
  • fiddler
  • wireshark
  • httpanalyzer
  • httpdebuggerui
  • httpde
  • memoryhook
  • olly
  • megadu
  • de4d
  • confuser
  • sndtool
  • simpleassemblyexplorer
  • netflowanalyzer
  • octosniff
  • electrosniifer
  • consolesniffer
  • smsniff
  • httpnetworksniffer
  • burpsuite
  • sniffer
  • taskmanager
  • hack
  • killer
  • defender
  • anti

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file name:

• guard
• creepyr

It avoids encrypting files found in the following folders:

• Program files
• Program Files(x86)
• ProgramData
• Microsoft
• $Recycle
• Windows

It appends the following extension to the file name of the encrypted files:

• [{system key}][{ransom email}].creepy

It drops the following file(s) as ransom note:

• %User Temp%\creepyransowareencryptedyourfiles.exe
  
• %System Root%\READ ME ASAP.txt
  

It avoids encrypting files with the following file extensions:

• .creepy
• .sys