This ransomware is written in Jscript, a scripting language designed for Windows. This variant comes from an .LNK file that downloads it into affected computers.
To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
This is the Trend Micro detection for files that exhibit certain behaviors.
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
(default) = "{malware path and filename}.js argument"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\RAA\Raa-fnl
HKEY_CURRENT_USER\RAA\Raa-DI
It adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\RAA\Raa-fnl
(Default) = "beenFinished"
HKEY_CURRENT_USER\RAA\Raa-DI
(Default) = "{victim ID}"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\VSS
(Note: This is the Windows Volume Shadow Copy (VSS) Service)
Other Details
This Trojan encrypts files with the following extensions:
- .doc
- .xls
- .rtf
- .pdf
- .dbf
- .jpg
- .dwg
- .cdr
- .psd
- .cd
- .mdb
- .png
- .lcd
- .zip
- .rar
- .locked
- ~
- $
- csv
It drops the following file(s)/component(s):
- %My Documents%\doc_attached_{5 random characters} - word document containing fake error message in Russian language
- %Desktop%\!!!README!!!{random characters}.rtf - ransom note
- {Drive}:\!!!README!!!{random characters}.rtf - ransom note
(Note: %My Documents% is usually C:\Documents and Settings\{user name}\My Documents on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Documents on Windows Vista and 7.)
(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.)
This is the Trend Micro detection for:
It does the following:
- It encrypts files in all available drives and appends the extension .locked
- It avoids encrypting files in folders/directories containing the following strings:
- WINDOWS
- RECYCLER
- Program Files
- Program Files (x86)
- Windows
- Recycle.Bin
- RECYCLE.BIN
- Recycler
- TEMP
- APPDATA
- AppData
- Temp
- ProgramData
- Microsoft
- It connects to the following URL to send the victim ID:
- http://{BLOCKED}lloworld.com/mars.php?id={victim ID} - RAA
NOTES:
This ransomware opens the dropped document file containing a fake error message in Russian language stating that it requires a newer Word version to open the said document:
After its encryption routine, it opens the dropped ransom note:
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
Scan your computer with your Trend Micro product and note files detected as RANSOM_JSRAA.D
Step 4
Restart in Safe Mode
[ Learn More ]
[ back ]
To restart in Safe Mode:
• For Windows 2000 users
- Restart your computer.
- Press F8 when you see the Starting Windows bar at the bottom of the screen.
- Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.
• For Windows XP users
- Restart your computer.
- Press F8 after the Power-On Self Test (POST) routine is done. If the Windows Advanced Options menu does not appear, try restarting then pressing F8 several times when the POST screen appears.
- Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.
• For Windows Server 2003 users
- Restart your computer.
- Press F8 after Windows starts up. If the Windows Advanced Options menu does not appear, try restarting again and pressing F8 several times afterward.
- On the Windows Advanced Option menu, use the arrow keys to select Safe Mode then press Enter.
• For Windows Vista, Windows 7, and Windows Server 2008 users
- Restart your computer.
- Press F8 after the Power-On Self Test (POST) routine is done. If the Advanced Boot Options menu does not appear, try restarting and then pressing F8 several times after the POST screen is displayed.
- On the Advanced Boot Options menu, use the arrow keys to select the Safe Mode option, and then press Enter.
• For Windows 8, Windows 8.1, and Windows Server 2012 users
- Access the Charms bar by moving your mouse pointer to the upper right corner of the screen.
- Move your mouse pointer down and click Settings>Change your PC Settings.
- In the left panel, click General.
- In the right panel, scroll down to the bottom to find the Advanced startup section, then click the Restart now button and wait for the system to restart.
- In the Advanced Startup menu, click Troubleshoot>Advanced Options>Startup Settings>Restart and wait for the system to restart.
- In the Startup Settings menu, press 4 to enable safe mode.
Step 5
Delete this registry value
[ Learn More ]
[ back ]
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
- (default) = "{malware path and filename}.js argument"
To delete the registry value this malware created:
- Open Registry Editor. To do this:
» For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
» For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter. - In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Run - In the right panel, locate and delete the entry:
(default) = "{malware path and filename}.js argument" - Close Registry Editor.
Step 6
Delete this registry key
[ Learn More ]
[ back ]
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.
To delete registry keys this malware/grayware created:
- Open Registry Editor. To do this:
» For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
» For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter. - In the left panel of the Registry Editor window, double-click the following:
HKEY_CURRENT_USER - Still in the left panel, locate and delete the key:
RAA - Close Registry Editor.
Step 7
Search and delete these files
[ Learn More ]
[ back ]
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.
- %My Documents%\doc_attached_{5 random characters}
- %Desktop%\!!!README!!!{random characters}.rtf
- {Drive}:\!!!README!!!{random characters}.rtf
To delete malware/grayware files:
For Windows 2000, Windows XP, and Windows Server 2003:
- Right-click Start then click Search....
- In the File name* input box, type
- %My Documents%\doc_attached_{5 random characters}
- %Desktop%\!!!README!!!{random characters}.rtf
- {Drive}:\!!!README!!!{random characters}.rtf
- In the Look In drop-down list, select My Computer then press Enter.
- Once located, select the file then press SHIFT+DELETE to delete it.
- Repeat the said steps for all files listed.
*Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).
For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
- Open a Windows Explorer window.
- For Windows Vista, 7, and Server 2008 users, click Start>Computer.
- For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
- In the Search Computer/This PC input box, type:
- %My Documents%\doc_attached_{5 random characters}
- %Desktop%\!!!README!!!{random characters}.rtf
- {Drive}:\!!!README!!!{random characters}.rtf
- Once located, select the file then press SHIFT+DELETE to delete it.
- Repeat the said steps for all files listed.
*Note: Read the following Microsoft page if these steps do not work on Windows 7.
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_JSRAA.D. 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 9
Restore encrypted files from backup.
Did this description help? Tell us how we did.