TSPY_EMOTET.AI
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. It may be downloaded by other malware/grayware/spyware from remote 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.
It may be downloaded by other malware/grayware/spyware from remote sites.
Installation
This Trojan Spy drops the following copies of itself into the affected system and executes them:
- %System%\{string 1}{string 2}.exe
where {string 1} and {string 2} is a combination of any of the following strings:- agent
- app
- audio
- bio
- bits
- cache
- card
- cart
- cert
- com
- crypt
- dcom
- defrag
- device
- dhcp
- dns
- event
- evt
- flt
- gdi
- group
- help
- home
- host
- info
- iso
- launch
- log
- logon
- lookup
- man
- math
- mgmt
- msi
- ncb
- net
- nv
- nvidia
- proc
- prop
- prov
- provider
- reg
- rpc
- screen
- search
- sec
- server
- service
- shed
- shedule
- spec
- srv
- storage
- svc
- sys
- system
- task
- time
- video
- view
- win
- window
- wlan
- wmi
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 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\{string 1}{string 2}
ImagePath = "%System%\{string 1}{string 2}.exe "
Other Details
This Trojan Spy connects to the following possibly malicious URL:
- {BLOCKED}.{BLOCKED}.25.5:443
SOLUTION
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
Restart in Safe Mode
Step 4
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_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services
- {string 1}{string 2}
- {string 1}{string 2}
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_EMOTET.AI. 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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