BKDR_XRAT.KVM
Trojan:Win32/Dynamer!rfn [non_writable_container] (MICROSOFT); Troj/Agent-AYLF (SOPHOS_LITE); Trojan.GenericKD.30322393 (BITDEFENDER)
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It deletes itself after execution.
TECHNICAL DETAILS
1,093,120 bytes
EXE
No
09 Feb 2018
Drops files
Arrival Details
This Backdoor 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 Backdoor drops the following files:
- {Current Directory}\Microsoft.Win32.TaskScheduler.dll
Other System Modifications
This Backdoor deletes the following files:
- {Current Directory}\Microsoft.Win32.TaskScheduler.dll
Other Details
This Backdoor deletes itself after execution.
It adds the following scheduled tasks:
- Microsoft_Security_Task
- Trigger: Daily - every 5 mins for 60 days
- Action: Start a program - %Application Data%\Microsoft Network\microsoft_network\1.0.0.0\microsoft_network.exe (detected as BKDR_XRAT.KVL)
SOLUTION
9.850
14.168.06
03 Apr 2018
14.169.00
04 Apr 2018
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
Identify and terminate files detected as BKDR_XRAT.KVM
- 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 5
Search and delete these files
- %System%\Tasks\Microsoft_Security_Tasks
- %Application Data%\Microsoft Network\microsoft_network\1.0.0.0\microsoft_network.exe
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_XRAT.KVM. 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.
Step 7
Scan your computer with your Trend Micro product to delete files detected as BKDR_XRAT.KVM. 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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