RANSOM_DUMB.H
Trojan-Ransom.MSIL.Agent.goc (Kaspersky); Ransom.Koolova (Malwarebytes); Trojan:Win32/Tiggre!rfn (Microsoft)
Windows
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Threat Type: Ransomware
Destructiveness: No
Encrypted: No
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.
TECHNICAL DETAILS
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.
Other Details
This Ransomware does the following:
- It will only continue its routines if the folder "%User Profile%\Documents\YES" exists
- It will create a new desktop wherein the following window will be shown:
- It will open the following window if the Deposit button is clicked:
- If you input the following in the second window, the malware could be bypassed and you could simply press Decrypt to close it:
SOLUTION
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
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_DUMB.H. 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.
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