Ransom.Win32.XIAOBA.AA
Trojan:Win32/Occamy.C (Microsoft); Trojan-Ransom.FileCrypter (Ikarus)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, 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.
TECHNICAL DETAILS
12,384,840 bytes
EXE
UPX
Yes
18 Mar 2019
Displays graphics/image, Plays a Chinese song, Modifies system registry
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:
- %Windows%\{Random Characters}.bmp
- %User Temp%\XiaoBa.mp3
- %User Temp%\XiaoBa.bmp
- %System Root%\autoexec.{Random Characters}[{BLOCKED}eng@yeah.net].XiaoBa
It adds the following processes:
- vssadmin delete shadow /all /quiet -> deletes all shadow copies
- wmic shadowcopy delete -> deletes all shadow copies
- bcdedit /set {default} boostatuspolicy ignoreallfailures -> Disables Windows Recovery on Startup
- bcdedit /set {default} recoveryenabled no -> Disables Windows Recovery on Startup
- wbadmin delete catalog -quiet -> Clears Windows Server backup history
Other System Modifications
This Ransomware changes the desktop wallpaper by modifying the following registry entries:
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %Windows%\{Characters}.bmp
HKEY_CURRENT_USER\Control Panel\Desktop
Wallpaper = %User Temp%\XiaoBa.bmp
It sets the system's desktop wallpaper to the following image:
Other Details
This Ransomware does the following:
- Displays the following:
- The window also plays a Chinese song.
- Shows the message box if the input password is incorrect:
- Displays the following:
- Encrypts all files in all drives.
- Deletes encrypted files if demands are not met.
Ransomware Routine
This Ransomware appends the following extension to the file name of the encrypted files:
- {File Name}.{Random Characters}[{BLOCKED}eng@yeah.net].XiaoBa
SOLUTION
9.850
14.878.05
18 Mar 2019
14.879.00
19 Mar 2019
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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
Step 4
Reset your Desktop properties
Step 5
Search and delete these files
- %Windows%\{Random Characters}.bmp
- %User Temp%\XiaoBa.mp3
- %User Temp%\XiaoBa.bmp
- %System Root%\autoexec.{Random Characters}[{BLOCKED}eng@yeah.net].XiaoBa
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom.Win32.XIAOBA.AA. 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 7
Restore encrypted files from backup.
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