RANSOM_RASOON.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 is capable of encrypting files in the affected system.

It drops files as ransom note.

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 the following files:

• %User Temp%\ErrorLogAes.bin

(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.)

Information Theft

This Ransomware gathers the following data:

• Public IP address
• Computer Name
• Encryption routine duration
• Number and size of files encrypted

Stolen Information

This Ransomware sends the data it gathers to the following email addresses via SMTP:

• pulpy2@{BLOCKED}k.li

Other Details

This Ransomware does the following:

• After its encryption routine it opens the dropped ransom note file using the following commands:
  %System%\NOTEPAD.EXE %Desktop%\Instruction.txt
• If the running ransomware is located at %System Root%, it deletes itself after its execution

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It is capable of encrypting files in the affected system.

Ransomware Routine

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

• .aes
• .sys
• .SYS
• bootmgr
• BOOTNXT
• .ani
• .cpl
• .cur
• .dat
• .deskthemepack
• .diagcab
• .diagpkg
• .dmp
• .drv
• .hlp
• .icl
• .msp
• .msstyles
• .ocx
• .rtp
• .themepack
• .CAB
• .settingcontent-ms
• .lnk
• Instruction.txt
• {malware file}

It avoids encrypting files with the following strings in their file path:

• C:\Drivers
• Program Files
• Windows
• ProgramData
• C:\Users\All Users\Microsoft
• C:\Users\Default\AppData\Roaming\Microsoft
• AppData\Local\Packages
• AppData
• WINDOWS
• Desctop

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

• .aes

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

• {all directories*}\Instruction.txt

It leaves text files that serve as ransom notes containing the following text:

• Hi, all your files have been encrypted. You can decipher if you write to me on the mail: pulpy2@{BLOCKED}k.li Otherwise, all your files will be deleted within 2 days without any problems!