TROJ_DROPER.SMM2
Backdoor:Win32/Dedipros.A (Microsoft); Generic BackDoor.ba (McAfee); Trojan.Dropper (Symantec); Backdoor.Win32.Bifrose.fur (Kaspersky); Trojan.Win32.Agent.Betq (v) (Sunbelt); Trojan.Generic.1815320 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
161,585 bytes
EXE
Yes
07 Feb 2012
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Autostart Technique
This Trojan registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Rspdates Apxplicatioanjrq\Parameters
Other System Modifications
This Trojan deletes the following files:
- %Windows%\MyInformations.ini
- %Windows%\FuckYou.txt
- %Windows%\FuckYou.reg
(Note: %Windows% is the Windows folder, which is usually C:\Windows.)
It adds the following registry keys:
HKEY_LOCAL_MACHINE\Software\FuckYou
HKEY_LOCAL_MACHINE\Software\Rspdates Apxplicatioanjrq\
Parameters
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\FuckYou
netsvcs = {random characters}
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Rspdates Apxplicatioanjrq
Description = "ÄÚºËÇý¶¯¹ÜÀí¡£Èç¹û´Ë·þÎñ±»½ûÓ㬼ÆËã»ú¿ÉÄܲ»ÄÜʹÓà Çý¶¯¹ÜÀí¹¦ÄÜ¡£"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Rspdates Apxplicatioanjrq\Parameters
ServiceDll = [REG_EXPAND_SZ, value: ]
HKEY_LOCAL_MACHINE\SOFTWARE\Rspdates Apxplicatioanjrq\
Parameters
ServiceDll = "%System%\winnie.dll"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Rspdates Apxplicatioanjrq
Load_Path = "{malware path and file name}"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Rspdates Apxplicatioanjrq
ConnectGroup = "ºÚÍ«"
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\Rspdates Apxplicatioanjrq
Type = "12"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Rspdates Apxplicatioanjrq\
Parameters
Dropping Routine
This Trojan drops the following files:
- %User Temp%\wi39015nd.temp
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Other Details
This Trojan deletes the initially executed copy of itself
This report is generated via an automated analysis system.
SOLUTION
9.200
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 key
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\SYSTEM\CurrentControlSet\Services\Rspdates Apxplicatioanjrq
- Parameters
- In HKEY_LOCAL_MACHINE\Software
- FuckYou
- In HKEY_LOCAL_MACHINE\Software\Rspdates Apxplicatioanjrq
- Parameters
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\FuckYou
- netsvcs = "{random characters}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Rspdates Apxplicatioanjrq
- Description = "ÄÚºËÇý¶¯¹ÜÀí¡£Èç¹û´Ë·þÎñ±»½ûÓ㬼ÆËã»ú¿ÉÄܲ»ÄÜʹÓà Çý¶¯¹ÜÀí¹¦ÄÜ¡£"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Rspdates Apxplicatioanjrq\Parameters
- ServiceDll = "[REG_EXPAND_SZ, value: ]"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Rspdates Apxplicatioanjrq\Parameters
- ServiceDll = "%System%\winnie.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Rspdates Apxplicatioanjrq
- Load_Path = "{malware path and file name}"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Rspdates Apxplicatioanjrq
- ConnectGroup = "ºÚÍ«"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Rspdates Apxplicatioanjrq
- Type = "12"
Step 5
Search and delete this file
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DROPER.SMM2. 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.
Step 7
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %Windows%\MyInformations.ini
- %Windows%\FuckYou.txt
- %Windows%\FuckYou.reg
Step 8
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Rspdates Apxplicatioanjrq
- Parameters
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