BKDR_SINGU.O
Backdoor:Win32/Singu.O (Microsoft); BackDoor-CGX (McAfee); Infostealer (Symantec); Backdoor.Win32.Singu.o (Kaspersky); BehavesLike.Win32.Malware.wsc (mx-v) (Sunbelt); Trojan horse BackDoor.Generic6.MGD (AVG)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
208,124 bytes
EXE
Yes
10 Jul 2013
Arrival Details
This backdoor 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 backdoor drops the following copies of itself into the affected system:
- %Windows%\aaaaaaaaaaaaaaaaaaa.exe
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
It creates the following folders:
- %System%\VxdDriver
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
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
aaaaaaaaaaaaaaaaaaa = "%Windows%\aaaaaaaaaaaaaaaaaaa.exe"
Other System Modifications
This backdoor adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
EnableAutodial = "{random values}"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
EnableAutodisconnect = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
EnableAutodial = "{random values}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings
EnableAutodisconnect = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Hardware Profiles\0001\Software\
Microsoft\windows\CurrentVersion\
Internet Settings
EnableAutodial = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Hardware Profiles\0001\Software\
Microsoft\windows\CurrentVersion\
Internet Settings
EnableAutodisconnect = "{random values}"
It modifies the following registry entries:
HKEY_CURRENT_USER\Control Panel\International
sDate = "-"
(Note: The default value data of the said registry entry is /.)
Dropping Routine
This backdoor drops the following files:
- %System%\FinDriv.dll
- %System%\VxdDriver\6-5-2013_6-12_000206C20001080080B822010FABFBFF.vxd
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
This report is generated via an automated analysis system.
SOLUTION
9.300
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
- aaaaaaaaaaaaaaaaaaa = "%Windows%\aaaaaaaaaaaaaaaaaaa.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- EnableAutodial = "{random values}"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- EnableAutodisconnect = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings
- EnableAutodial = "{random values}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings
- EnableAutodisconnect = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings
- EnableAutodial = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings
- EnableAutodisconnect = "{random values}"
Step 4
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Control Panel\International
- From: sDate = "-"
To: sDate = ""/""
- From: sDate = "-"
Step 5
Search and delete these components
- %System%\FinDriv.dll
- %System%\VxdDriver\6-5-2013_6-12_000206C20001080080B822010FABFBFF.vxd
Step 6
Search and delete this folder
- %System%\VxdDriver
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_SINGU.O. 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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