Coinminer.Win64.MALXMR.TIAOODDQ
HEUR:RiskTool.Win32.BitCoinMiner.vho (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows
Threat Type: Coinminer
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Coinminer 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 Coinminer 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 Coinminer adds the following processes:
- %Windows%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
- %System%\svchost.exe -k LocalServiceAndNoImpersonation
- %Windows%\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
- %System%\sppsvc.exe
- "%System Root%\Program Files\Windows Media Player\wmpnetwk.exe"
- %System%\svchost.exe -k WerSvcGroup
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)
It creates the following folders:
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Autostart Technique
This Coinminer 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\WinRing0_1_2_0
ImagePath = "%System%\WinRing0x64.sys"
Other System Modifications
This Coinminer deletes the following files:
- %Windows%\LastGood.Tmp
(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\SYSTEM\CurrentControlSet\
services\WinRing0_1_2_0
DeleteFlag = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\WinRing0_1_2_0
Start = "4"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinRing0_1_2_0
DisplayName = "WinRing0_1_2_0"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinRing0_1_2_0
Start = "SERVICE_DEMAND_START"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\upnphost
Type = "16"
(Note: The default value data of the said registry entry is 20.)
Dropping Routine
This Coinminer drops the following files:
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )
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
Identify and terminate files detected as Coinminer.Win64.MALXMR.TIAOODDQ
- 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 3
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\SYSTEM\CurrentControlSet\services\WinRing0_1_2_0
- DeleteFlag = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\WinRing0_1_2_0
- Start = "4"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinRing0_1_2_0
- DisplayName = "WinRing0_1_2_0"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinRing0_1_2_0
- Start = "SERVICE_DEMAND_START"
Step 4
Restore these modified registry values
Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\upnphost
- From: Type = "16"
To: Type = ""20""
- From: Type = "16"
Step 5
Search and delete these components
- %All Users Profile%\Microsoft\Windows\DRM\v3ks.sec
- %All Users Profile%\Microsoft\Windows\DRM\drmstore.hds
Step 6
Search and delete this folder
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
Step 7
Scan your computer with your Trend Micro product to delete files detected as Coinminer.Win64.MALXMR.TIAOODDQ. 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 8
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.
- %Windows%\LastGood.Tmp
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