RANSOM_CERBER.SMJAL
Ransom:Win32/Cerber (Microsoft); Ransom.Cerber (Malwarebytes); Trojan-Ransom.Win32.Zerber.cppa (Kaspersky)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
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 deletes the initially executed copy of itself. It is capable of encrypting files in the affected system.
TECHNICAL DETAILS
480,715 bytes
EXE
No
10 Mar 2017
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%\tmp{random characters}.bmp
- {folders containing encrypted files}\_HELP_HELP_HELP_{random characters}_.hta
- {folders containing encrypted files}\_HELP_HELP_HELP_{random characters}_.png
- %Desktop%\_HELP_HELP_HELP_{random characters}_.hta
- %Desktop%\_HELP_HELP_HELP_{random characters}_.png
- %User Temp%\{8 random characters}\{4 random characters}.tmp
- %User Temp%\{8 random characters}\{4 random characters}.tmp
(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.. %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.)
It creates the following folders:
- %User Temp%\{8 random characters}
(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.)
Other System Modifications
This Ransomware changes the desktop wallpaper by modifying the following registry entries:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %User Temp%\tmp{random characters}.bmp
(Note: The default value data of the said registry entry is {User defined}.)
Other Details
This Ransomware renames encrypted files using the following names:
- {10 random characters}.{4 random characters}
It deletes the initially executed copy of itself
It is capable of encrypting files in the affected system.
SOLUTION
9.850
13.346.08
17 Apr 2017
13.347.00
18 Apr 2017
NOTES:
Trend customers:
Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.
All Internet users:
- Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
- Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.
Did this description help? Tell us how we did.