TROJ_MEDFOS.ACE
Trojan:Win32/Medfos.A (Microsoft), Trojan.Win32.Midhos.agmx (Kaspersky)
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
This Trojan may be dropped by other malware.
It exports functions used by other malware. It requires its main component to successfully perform its intended routine.
TECHNICAL DETAILS
169,984 bytes
Yes
16 Jan 2013
Arrival Details
This Trojan may be dropped by other malware.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{malware file name} = "rundll32.exe "{malware path and file name}",ReadSpan"
Other Details
This Trojan exports functions used by other malware.
It connects to the following possibly malicious URL:
- {BLOCKED}h.cdn155.hostingnowuploadetc.com
It requires its main component to successfully perform its intended routine.
SOLUTION
9.300
9.658.07
16 Jan 2013
9.659.00
16 Jan 2013
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
Scan your computer with your Trend Micro product and note files detected as TROJ_MEDFOS.ACE
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- {malware file name} = "rundll32.exe "{malware path and file name}",ReadSpan"
- {malware file name} = "rundll32.exe "{malware path and file name}",ReadSpan"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_MEDFOS.ACE. 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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