RANSOM_RADIATION.A


 ALIASES:

Trojan-Ransom.Win32.Agent.izb (KASPERSKY); Trojan.Malcol.Ransom (NORTON); Trojan.GenericKD.5548406 (BITDEFENDER)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware

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 encrypts files with specific file extensions. It encrypts files found in specific folders. It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

311,296 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

02 Jul 2017

Payload:

Drops files, Steals information, Displays message/message boxes

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:

  • %User Temp%\decrypter.exe - decryption form

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
Microsoft Runtime = {Malware Path}\{Malware Name}.exe

Other System Modifications

This Ransomware changes the desktop wallpaper by modifying the following registry entries:

HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %User Temp%\memes.jpg

It sets the system's desktop wallpaper to the following image:

Dropping Routine

This Ransomware drops the following files:

  • %User Temp%\memes.jpg - wallpaper
  • {Malware Path}\RADIATION.bin - contains RSA key
  • {Malware Path}\public.memes
  • {Malware Path}\private.memes
  • C:\autoexec.bat

(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 attempts to steal stored email credentials from the following:

  • %AppDataLocal%\Microsoft\Outlook\Outlook.pst

(Note: %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.)

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .doc
  • .docx
  • .xls
  • .xlsx
  • .ppt
  • .pptx
  • .pst
  • .ost
  • .msg
  • .eml
  • .vsd
  • .vsdx
  • .txt
  • .csv
  • .rtf
  • .123
  • .wks
  • .wk1
  • .pdf
  • .dwg
  • .onet
  • .oc2
  • .snt
  • .jpeg
  • .jpg
  • .docb
  • .docm
  • .dot
  • .dotm
  • .dotx
  • .xlsm
  • .xlsb
  • .xlw
  • .xlt
  • .xlm
  • .xlc
  • .xltx
  • .xltm
  • .pptm
  • .pot
  • .pps
  • .ppsm
  • .ppsx
  • .ppam
  • .potx
  • .potm
  • .edb
  • .hwp
  • .602
  • .sxi
  • .sti
  • .sldx
  • .sldm
  • .vdi
  • .vmdk
  • .vmx
  • .gpg
  • .aes
  • .ARC
  • .PAQ
  • .bz2
  • .tbk
  • .bak
  • .tar
  • .tgz
  • .gz
  • .7z
  • .rar
  • .zip
  • .backup
  • .iso
  • .vcd
  • .bmp
  • .png
  • .gif
  • .raw
  • .cgm
  • .tif
  • .tiff
  • .nef
  • .psd
  • .ai
  • .svg
  • .djvu
  • .m4u
  • .m3u
  • .mid
  • .wma
  • .flv
  • .3g2
  • .mkv
  • .3gp
  • .mp4
  • .mov
  • .avi
  • .asf
  • .mpeg
  • .vob
  • .mpg
  • .wmv
  • .fla
  • .swf
  • .wav
  • .mp3
  • .sh
  • .class
  • .jar
  • .java
  • .rb
  • .asp
  • .php
  • .jsp
  • .brd
  • .sch
  • .dch
  • .dip
  • .pl
  • .vb
  • .vbs
  • .ps1
  • .bat
  • .cmd
  • .js
  • .asm
  • .h
  • .pas
  • .cpp
  • .c
  • .cs
  • .suo
  • .sln
  • .ldf
  • .mdf
  • .ibd
  • .myi
  • .myd
  • .frm
  • .odb
  • .dbf
  • .db
  • .mdb
  • .accdb
  • .sql
  • .sqlitedb
  • .sqlite3
  • .asc
  • .lay6
  • .lay
  • .mml
  • .sxm
  • .otg
  • .odg
  • .uop
  • .std
  • .sxd
  • .otp
  • .odp
  • .wb2
  • .slk
  • .dif
  • .stc
  • .sxc
  • .ots
  • .ods
  • .3dm
  • .max
  • .3ds
  • .uot
  • .stw
  • .sxw
  • .ott
  • .odt
  • .pem
  • .p12
  • .csr
  • .crt
  • .key
  • .pfx
  • .der

It encrypts files found in the following folders:

  • C:\

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

  • {Malware Path}\decrypt.txt

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.512.02

FIRST VSAPI PATTERN DATE:

04 Jul 2017

VSAPI OPR PATTERN File:

13.513.00

VSAPI OPR PATTERN Date:

05 Jul 2017

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Microsoft Runtime = {Malware Path}\{Malware Name}.exe

Step 5

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %User Temp%\memes.jpg
  • {Malware Path}\RADIATION.bin
  • {Malware Path}\public.memes
  • {Malware Path}\private.memes
  • C:\autoexec.bat
  • %User Temp%\decrypter.exe
  • {Malware Path}\decrypt.txt

Step 6

Reset your Desktop properties

[ Learn More ]

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_RADIATION.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 8

Restore encrypted files from backup.


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