TROJ_SIREFEF.AE
TrojanDropper:Win32/Sirefef.B (Microsoft), BackDoor-FCS (McAfee), Trojan.Zeroaccess (Symantec)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan may be dropped by other malware.
TECHNICAL DETAILS
60416 bytes
EXE
Yes
22 Jan 2012
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_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
Shell = "%Application Data%\c397c700\X"
SOLUTION
9.200
8.724.07
22 Jan 2012
8.725.00
22 Jan 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
Restart in Safe Mode
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 NT\CurrentVersion\Winlogon
- Shell = "%Application Data%\c397c700\X"
- Shell = "%Application Data%\c397c700\X"
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_SIREFEF.AE. 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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