Trojan.Win32.GULOADER.A
Trojan:Win32/Guloader.GM!MTB (MICROSOFT); Trojan.GenericKD.33617940 (BITDEFENDER)
Windows
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Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It creates registry entries to enable its automatic execution at every system startup.
As of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Dropping Routine
This Trojan drops the following files:
- {Malware Directory}\DHL Shipment Arrival Notification.exe
- {Malware Directory}\DHL Shipment Arrival Notification.zip → password protected archive
Download Routine
This Trojan accesses the following websites to download files:
- https://onedrive.live.com/download?cid={BLOCKED}TLU8Zz0
- https://onedrive.live.com/download?cid={BLOCKED}oRZ5yJshQ
As of this writing, the said sites are inaccessible.
Other Details
This Trojan does the following:
- It executes the downloaded file.
- The dropped archive contains an executable file:
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
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
Identify and terminate files detected as Trojan.Win32.GULOADER.A
- 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 4
Search and delete these files
- {Malware Directory}\DHL Shipment Arrival Notification.exe
- {Malware Directory}\DHL Shipment Arrival Notification.zip
Step 5
Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.GULOADER.A. 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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