This worm arrives via removable drives.
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
Arrival Details
This worm arrives via removable drives.
Installation
This worm drops the following copies of itself into the affected system:
- %User Profile%\{random characters}.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It injects threads into the following normal process(es):
Autostart Technique
This worm adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Winlogon
Taskman = "%User Profile%\{random characters}.exe"
Propagation
This worm creates the following folders in all removable drives:
It drops the following copy(ies) of itself in all removable drives:
- [drive letter]:\mamuran\budaletinaa.exe
It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.
The said .INF file contains the following strings:
[autorun]
$
USEAUTOPLAY=1
shellexecute=mamuran\\budaletinaa.exe
shell\Install\command=mamuran\\budaletinaa.exe
shell\open\command=mamuran\\budaletinaa.exe
shell\explore\command=mamuran\\budaletinaa.exe
Shell\open\command=mamuran\\budaletinaa.exe
open=mamuran\\budaletinaa.exe
Icon=mamuran\\budaletinaa.exe
action=Open folder to view files using Windows Explore
@
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
Identify and delete files detected as WORM_RIMECUD.SME using either the Startup Disk or Recovery Console
[ Learn More ]
[ back ]
To identify and delete the malware/grayware file:
• On Windows XP and Server 2003 systems:
- Scan your computer with your Trend Micro product and then take note of the names of the malware/grayware files detected.
- Click Start>Run. In the Open input box, type secpol.msc and press Enter.
- In the left panel, double-click Local Policies>Security Options.
- In the right panel, double-click Recovery Console: Allow floppy copy and access to all drives and folders.
- Select Enabled and click OK.
- Insert the Windows Installation CD into the CD drive, then restart your computer.
- When prompted, press any key to boot from the CD.
- On the main menu, type r to go to the Recovery Console.
- Type the number that corresponds to the drive and directory that contains Windows (usually C:\WINDOWS) and press Enter.
- Type the Administrator password and press Enter.
- In the input box, type the following then press Enter:
SET AllowAllPaths = TRUE
del "{malware/grayware path and file name}" - Type exit and press Enter to restart the system normally.
• On Windows Vista and 7 systems:
- Scan your computer with your Trend Micro product and then take note of the names of the malware/grayware files detected.
- Insert your Windows Installation DVD in the DVD drive, then Press the restart button.
- When prompted, press any key to boot from the CD.
- Depending on your Windows Installation DVD, you might be required to select the installation language. Then on the Install Windows window, choose your language, locale, and keyboard layout or input method. Click Next, then click Repair your computer.
- Select Use recovery tools that can help fix problems starting Windows. Select your installation of Windows. Click Next.
- If the Startup Repair window appears, click Cancel, Yes, then Finish.
- In the System Recovery Options window, click Command Prompt.
- In the Command Prompt window, type the following then press Enter:
BootRec.exe /fixmbr
del "{malware/grayware path and file name}" - Type exit and press Enter to close the Command Prompt window.
- Click Restart to restart the system normally.
Step 3
Delete this registry value
[ Learn More ]
[ back ]
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 NT\CurrentVersion\Winlogon
- Taskman = "%User Profile%\{random characters}.exe"
To delete the registry value this malware created:
- Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
- In the left panel of the Registry Editor window, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Winlogon - In the right panel, locate and delete the entry:
Taskman = "%User Profile%\{random characters}.exe" - Close Registry Editor.
Step 4
Search and delete these folders
[ Learn More ]
[ back ]
Please make sure you check the
Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result. [drive letter]:\mamuran
To delete malware/grayware/spyware folders:
- Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
- In the Named input box, type:
- In the Look In drop-down list, select My Computer, then press Enter.
- Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.
- Repeat steps 2 to 4 for the remaining folders:
Step 5
Search and delete AUTORUN.INF files created by WORM_RIMECUD.SME that contain these strings
[ Learn More ]
[ back ]
[autorun]
$
USEAUTOPLAY=1
shellexecute=mamuran\\budaletinaa.exe
shell\Install\command=mamuran\\budaletinaa.exe
shell\open\command=mamuran\\budaletinaa.exe
shell\explore\command=mamuran\\budaletinaa.exe
Shell\open\command=mamuran\\budaletinaa.exe
open=mamuran\\budaletinaa.exe
Icon=mamuran\\budaletinaa.exe
action=Open folder to view files using Windows Explore
@
To identify and delete AUTORUN.INF files created:
- Right-click the Start button then choose Search... or Find..., depending on the version of Windows you are running.
- In the Named input box, type:
AUTORUN.INF - In the Look in: drop-down list, select a drive, then press Enter.
- Select the file, then open using Notepad.
- Check if the following lines are present in the file:
[autorun]
$
USEAUTOPLAY=1
shellexecute=mamuran\\budaletinaa.exe
shell\Install\command=mamuran\\budaletinaa.exe
shell\open\command=mamuran\\budaletinaa.exe
shell\explore\command=mamuran\\budaletinaa.exe
Shell\open\command=mamuran\\budaletinaa.exe
open=mamuran\\budaletinaa.exe
Icon=mamuran\\budaletinaa.exe
action=Open folder to view files using Windows Explore
@
- If the lines are present, delete the file.
- Repeat steps 3 to 6 for the remaining AUTORUN.INF files in other remaining removable drives.
- Close Search Results.
Step 6
Scan your computer with your Trend Micro product to delete files detected as WORM_RIMECUD.SME. 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.
Did this description help? Tell us how we did.