BKDR_ANDROM.YVF
Win32/TrojanDownloader.Wauchos.X (Eset), Win32.Malware!Drop (Sunbelt), Trojan-Spy.Zbot (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: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor may be unknowingly downloaded by a user while visiting malicious websites.
It listens on ports.
TECHNICAL DETAILS
81,920 bytes
EXE
Yes
13 Dec 2013
Arrival Details
This backdoor may be unknowingly downloaded by a user while visiting malicious websites.
Installation
This backdoor drops the following copies of itself into the affected system:
- %All Users Profile%\explorer.exe
(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Start Wingman Profile = "%All Users Profile%\explorer.exe"
Other System Modifications
This backdoor creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{Malware Path and Filename} = "{Malware Path and Filename}:*:Enabled:excel"
Backdoor Routine
This backdoor listens on the following port(s):
- 3232
SOLUTION
9.700
10.466.05
11 Dec 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
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- Start Wingman Profile = "%All Users Profile%\explorer.exe"
- Start Wingman Profile = "%All Users Profile%\explorer.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
- "{Malware Path and Filename} " = "{Malware Path and Filename}:*:Enabled:excel"
- "{Malware Path and Filename} " = "{Malware Path and Filename}:*:Enabled:excel"
Step 4
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_ANDROM.YVF. 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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