RANSOM_STUPMALABU.A
Ransom:Win32/Genasom (Microsoft); RDN/Ransom (NAI)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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
51,200 bytes
EXE
Yes
17 Apr 2017
Displays message/message boxes, Encrypts files
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.
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
MALABU-X = {malware path and filename}
Other System Modifications
This Ransomware adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
Disable Taskmgr = 1
Process Termination
This Ransomware terminates the following processes if found running in the affected system's memory:
- Taskmgr
Other Details
This Ransomware encrypts files with the following extensions:
- .3gp
- .ahok
- .apk
- .asp
- .aspx
- .avi
- .doc
- .doc
- .docx
- .encrypt
- .flac
- .html
- .jpeg
- .jpg
- .MOV
- .mov
- .mp3
- .mp4
- .php
- .png
- .ppt
- .pptx
- .psd
- .rar
- .raw
- .txt
- .wav
- .wma
- .wmv
- .xls
- .xlsx
- .zip
It renames encrypted files using the following names:
- {original filename and extension}.fucked
It does the following:
- It avoids encrypting files if the path ends with the following:
- indows
- tings
- System Volume Information
- cache
- very
- rogram Files (x86)
- rogram Files
- boot
- efi
- .old
NOTES:
This ransomware displays the following lock screen:
It also displays the following message if the user tries to close the program by pressing ALT-F4:
SOLUTION
9.850
13.364.06
26 Apr 2017
13.367.00
27 Apr 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
Step 4
Delete this registry value
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
- MALABU-X = {malware path and filename}
- MALABU-X = {malware path and filename}
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- Disable Taskmgr = 1
- Disable Taskmgr = 1
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_STUPMALABU.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 6
Restore encrypted files from backup.
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