TrojanSpy.Win32.EMOTET.TIABOFJA
Windows
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
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 creates the following folders:
- %Windows%\SysWOW64\sxsstore
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Autostart Technique
This Trojan Spy registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\sxsstore
ImagePath = "%Windows%\SysWOW64\sxsstore\sxsstore.exe"
Other System Modifications
This Trojan Spy deletes the following files:
- {malware file path and name}
- %Windows%\SysWOW64\bidellipse.exe
- %Windows%\SysWOW64\sxsstore\sxsstore.exe:Zone.Identifier
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
explorer
1cca0df5 = "\x86\xb2\x1c\x86\xb9\x1c\x81\xa5\x1c\x87\xaf\x1c"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\sxsstore
DisplayName = "sxsstore"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\sxsstore
Start = "SERVICE_AUTO_START"
Dropping Routine
This Trojan Spy drops the following files:
- %Windows%\SysWOW64\sxsstore\sxsstore.exe
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Other Details
This Trojan Spy connects to the following possibly malicious URL:
- {BLOCKED}.32.88
- {BLOCKED}0.163.76
- {BLOCKED}.154.102
- {BLOCKED}5.24.251
- {BLOCKED}1.123.2
- {BLOCKED}0.175.133
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
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\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer
- 1cca0df5 = "\x86\xb2\x1c\x86\xb9\x1c\x81\xa5\x1c\x87\xaf\x1c"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sxsstore
- DisplayName = "sxsstore"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\sxsstore
- Start = "SERVICE_AUTO_START"
Step 3
Search and delete this file
- %Windows%\SysWOW64\sxsstore\sxsstore.exe
Step 4
Search and delete this folder
- %Windows%\SysWOW64\sxsstore
Step 5
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.EMOTET.TIABOFJA. 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.
- {malware file path and name}
- %Windows%\SysWOW64\bidellipse.exe
- %Windows%\SysWOW64\sxsstore\sxsstore.exe:Zone.Identifier
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