BKDR_REMOSH.BD
Backdoor:Win32/Remosh.gen!A (Microsoft), Trojan.Gen (Symantec), Gen:Trojan.Heur.FU.bqW@a8UY8zdi (FSecure), TR/Dropper.Gen (Antivir), Gen:Trojan.Heur.FU.bqW@a8UY8zdi (Bitdefender), PUA.Win32.Packer.SetupExeSection (Clamav), Win32/Agent.PGE trojan (NOD32), Suspicious file (Panda), TrojanDropper.Agent.fsix (VBA32)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor may be dropped by other malware. It may be manually installed by a user.
It uses common file icons to trick a user into thinking that the files are legitimate.
It deletes itself after execution.
TECHNICAL DETAILS
26,624 bytes
EXE
12 Sep 2012
Arrival Details
This backdoor may be dropped by the following malware:
- SWF_DROPPER.BD
It may be manually installed by a user.
Installation
This backdoor drops the following component file(s):
- %System%\recycler32.dll
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Its DLL component is injected to the following process(es):
- svchost.exe
It uses common file icons to trick a user into thinking that the files are legitimate.
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\6to4
ImagePath = %systemroot%\system32\svchost.exe -k netsvcs
Other System Modifications
This backdoor adds the following registry entries as part of its installation routine:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\6to4\Parameters
ServiceDll = %System%\recycler32.dll
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\6to4\Security
Security = {random value}
Other Details
This backdoor deletes itself after execution.