Backdoor.MSIL.NANOCORE.TIAOODEF
Trojan:MSIL/AgentTesla.MIB!MTB (Microsoft); GenericRXJI-WZ!E3C64D188344 (McAfee); HEUR:Backdoor.MSIL.NanoBot.gen (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows
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
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 adds the following processes:
- schtasks.exe /Create /TN "Updates\KqaTtwBnIlQ" /XML "%User Temp%\tmpD68F.tmp"
- "{malware file path and name}"
- %System%\svchost.exe -k LocalServiceAndNoImpersonation
- %System%\svchost.exe -k netsvcs
- "%System Root%\Program Files\Windows Media Player\wmpnetwk.exe"
- %System%\svchost.exe -k WerSvcGroup
(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(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
It creates the following folders:
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333\Logs
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333\Logs\{username}
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Dropping Routine
This Backdoor drops the following files:
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333\run.dat
- %Application Data%\KqaTtwBnIlQ.exe
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
- %All Users Profile%\Microsoft\Network\Downloader\qmgr0.dat
- %AppDataLocal%\GDIPFONTCACHEV1.DAT
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %All Users Profile%\Microsoft\Network\Downloader\qmgr1.dat
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Other Details
This Backdoor connects to the following possibly malicious URL:
- http://nawaooh.{BLOCKED}s.org
- http://fuckdynu.{BLOCKED}s.net
This report is generated via an automated analysis system.
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
Identify and terminate files detected as Backdoor.MSIL.NANOCORE.TIAOODEF
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 3
Search and delete these components
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333\run.dat
- %Application Data%\KqaTtwBnIlQ.exe
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
- %All Users Profile%\Microsoft\Network\Downloader\qmgr0.dat
- %AppDataLocal%\GDIPFONTCACHEV1.DAT
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %All Users Profile%\Microsoft\Network\Downloader\qmgr1.dat
Step 4
Search and delete these folders
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333\Logs
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333
- %Application Data%\0EFADD19-2A94-41FB-8931-F2BBC5D61333\Logs\{username}
Step 5
Scan your computer with your Trend Micro product to delete files detected as Backdoor.MSIL.NANOCORE.TIAOODEF. 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:
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