TrojanSpy.MSIL.NANOCORE.DMG
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan Spy
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan Spy 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
1,077,760 bytes
EXE
Yes
13 Jan 2020
Arrival Details
This Trojan Spy 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 Spy adds the following processes:
- http://go.{BLOCKED}oft.com/fwlink/?{random characters}(null)&processName={malware file name}.exe&platform=0009&osver=5&isServer=0&shimver=4.0.30319.34209
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:2996 CREDAT:275457 /prefetch:2
It creates the following folders:
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
- %Application Data%\Microsoft\Windows\IECompatUACache
- %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions
- %Application Data%\Microsoft\Windows\IECompatCache
- %Application Data%\Microsoft\Windows\DNTException
- %Application Data%\Microsoft\Windows\PrivacIE
(Note: %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).. %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).)
Other System Modifications
This Trojan Spy deletes the following files:
- %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
(Note: %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).)
Dropping Routine
This Trojan Spy drops the following files:
- %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{85D50694-BF02-11E9-9738-005056BC4C00}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{78D9F5E5-BF02-11E9-9738-005056BC4C00}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions\en-US.6
- %AppDataLocal%\Microsoft\Internet Explorer\imagestore\joppu72\imagestore.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{7FC766C2-BF02-11E9-9738-005056BC4C00}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\DOMStore\3UYAQU1F\docs.microsoft[1].xml
(Note: %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 Trojan Spy connects to the following possibly malicious URL:
- http://go.{BLOCKED}oft.com/fwlink/?{random characters}
- http://api.{BLOCKED}g.com
- http://www.{BLOCKED}g.com
- http://docs.{BLOCKED}oft.com
- http://ajax.{BLOCKED}cdn.com
- http://static.{BLOCKED}s.com
- http://az725175.{BLOCKED}o.msecnd.net
- http://sqm.{BLOCKED}try.microsoft.com
- http://ieonline.{BLOCKED}oft.com
This report is generated via an automated analysis system.
SOLUTION
9.850
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 TrojanSpy.MSIL.NANOCORE.DMG
- 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
- %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{85D50694-BF02-11E9-9738-005056BC4C00}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{78D9F5E5-BF02-11E9-9738-005056BC4C00}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions\en-US.6
- %AppDataLocal%\Microsoft\Internet Explorer\imagestore\joppu72\imagestore.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{7FC766C2-BF02-11E9-9738-005056BC4C00}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\DOMStore\3UYAQU1F\docs.microsoft[1].xml
Step 4
Search and delete these folders
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
- %Application Data%\Microsoft\Windows\IECompatUACache
- %AppDataLocal%\Microsoft\Internet Explorer\DomainSuggestions
- %Application Data%\Microsoft\Windows\IECompatCache
- %Application Data%\Microsoft\Windows\DNTException
- %Application Data%\Microsoft\Windows\PrivacIE
Step 5
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.NANOCORE.DMG. 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:
Step 6
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.
- %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
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