TROJ_RANSOM.SMO7
Ransom-ABD.gen.a (McAfee), Win32/TrojanDownloader.Zortob.B trojan (Eset)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet
This Trojan 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 certain websites to send and receive information.
TECHNICAL DETAILS
Varies
EXE
Yes
24 Oct 2012
Downloads files, Connects to URLs/IPs, Terminates processes
Arrival Details
This Trojan 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 Trojan drops the following copies of itself into the affected system:
- %Application Data%\{random}.exe
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)
It drops the following non-malicious file:
- {malware path and filename}.txt
It adds the following processes:
- svchost.exe
It injects codes into the following process(es):
- created svchost.exe
Other Details
This Trojan connects to the following website to send and receive information:
- {BLOCKED}.{BLOCKED}.211.194:8080/{generated value}
- {BLOCKED}.{BLOCKED}.20.226:8080/{generated value}
- {BLOCKED}.{BLOCKED}.212.160:8080/{generated value}
- {BLOCKED}.{BLOCKED}.224.202:8080/{generated value}
- {BLOCKED}.{BLOCKED}.236.108:8080/{generated value}
- {BLOCKED}.{BLOCKED}.112.99:8080/{generated value}
- {BLOCKED}.{BLOCKED}.136.150:8080/{generated value}
- {BLOCKED}.{BLOCKED}.31.53:8080/{generated value}
NOTES:
When a successful connection is made, this Trojan downloads a file from the URL with the parameters {Accessible URL}/get/faa91cf5e79a76602f094ed38fad5872.exe. If the malware failed to access any of the URLs, it creates the following registries:
HKEY_CURRENT_USER\SOFTWARE\{random}
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
{random} = "%Application Data%\{random}.exe"
HKEY_CURRENT_USER\SOFTWARE\{random}
{random} = "{hex values}"
SOLUTION
9.300
9.484.05
24 Oct 2012
9.485.00
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 Safe Mode
Step 3
Delete this registry key
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
- {random}
- {random}
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
- {random} = %Application Data%\{random}.exe
- {random} = %Application Data%\{random}.exe
Step 5
Search and delete these files
- {malware path and file name}.txt
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_RANSOM.SMO7. 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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