TSPY_EMOTET.SBZF
Win32/Emotet.AD trojan (Nod32)
Windows
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
258,122 bytes
EXE
Yes
26 Feb 2015
Connects to URLs/IPs, Steals information
Arrival Details
This spyware 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 spyware drops the following copies of itself into the affected system and executes them:
- %Application Data%\Microsoft\msdb{random}.exe
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It drops the following component file(s):
- %User Temp%\{random number}~.bat - used to delete initially executed copy of TSPY_EMOTET.SBZF and itself
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It injects itself into the following processes as part of its memory residency routine:
- explorer.exe
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
msdb{random}.exe = "%Application Data%\Microsoft\msdb{random}.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\Software\Rocal AppWizard-Generated Applications\
Apriori
HKEY_CURRENT_USER\Software\Microsoft\
Multimedia\Audio\Box
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
GlobalUserOffline = "0"
Information Theft
This spyware gathers the following data:
- computer name
- country
- volume information
- operating system
Other Details
This spyware connects to the following website to send and receive information:
- http://{BLOCKED}.{BLOCKED}17.67:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.160.196:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.138.90:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.207.58:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.129.13:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.3.194:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.225.91:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.17.144:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.85.224:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.224.231:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.189.24:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.135.44:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.105.107:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.254.29:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.213.41:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.6.134:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.193.123:8080/{random}/{random}/
- http://{BLOCKED}.{BLOCKED}.151.38:8080/{random}/{random}/
It does the following:
- It accesses the sites to post gathered information and download arbitrary files to be executed.
However, as of this writing, the said sites are inaccessible.
SOLUTION
9.750
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
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
Scan your computer with your Trend Micro product and note files detected as TSPY_EMOTET.SBZF
Step 4
Restart in Safe Mode
Step 5
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- msdb{random}.exe = "%Application Data%\Microsoft\msdb{random}.exe"
- msdb{random}.exe = "%Application Data%\Microsoft\msdb{random}.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
- GlobalUserOffline = "0"
- GlobalUserOffline = "0"
Step 6
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\Rocal AppWizard-Generated Applications
- Apriori
- Apriori
- In HKEY_CURRENT_USER\Software\Microsoft\Multimedia\Audio
- Box
- Box
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_EMOTET.SBZF. 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.
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