TROJ_RANSOM.SM09
Trojan:Win32/Tobfy.L (Microsoft), Trojan.Win32.Tobfy (Ikarus),
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware, Spammed via email
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to a website to send and receive information.
TECHNICAL DETAILS
212,480 bytes
EXE
Yes
24 Dec 2012
Connects to URLs/IPs, Downloads files, Terminates processes
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It 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 Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
GoogleChrome = "{malware path}\{malware name}.exe"
Backdoor Routine
This Trojan opens the following ports:
- 180
It connects to the following websites to send and receive information:
- {BLOCKED}29.104
Process Termination
This Trojan terminates the following processes if found running in the affected system's memory:
- taskmgr.exe
- msconfig.exe
- regedit.exe
- cmd.exe
Download Routine
This Trojan connects to the following URL(s) to download its component file(s):
- http://{BLOCKED}r1.ru/Silence/read.php?nm=32432
NOTES:
It modifies the following registry keys in order to prevent the system to restart in Safe Mode:
From: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot\Minimal
To: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot\mini
From: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot\Network
To: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\SafeBoot\net
SOLUTION
9.300
9.614.05
24 Dec 2012
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
Identify and delete files detected as TROJ_RANSOM.SM09 using the Recovery Console
Step 3
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
- GoogleChrome = "{malware path}\{malware name}.exe"
- GoogleChrome = "{malware path}\{malware name}.exe"
Step 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_RANSOM.SM09. 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.
NOTES:
Restore Safe Boot Registry Settings
To restore safe boot registry settings:
- Open a text editor like Notepad.
- Copy and paste the following script:
- On Windows 2000:
- On Windows Server 2003:
- On Windows XP:
- On Windows Vista:
- On Windows 7:
- On Windows 2000:
- Save this file as RESTORE.REG.
- Execute the file RESTORE.REG.
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