Worm.Win32.DOFOIL.AA
Trojan.Win32.Diss.suuhy (Kaspersky)
Windows
Threat Type: Worm
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Worm 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
90,624 bytes
EXE
Yes
02 Apr 2019
Arrival Details
This Worm 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 Worm drops the following files:
- {Removable Drive}:\.lnk
It drops the following copies of itself into the affected system:
- %User Startup%\win{random}.exe
- %Common Startup%\win{random}.exe
- %Windows%\{Random Numbers}\winsvcs.exe
- %Windows%\{Random Numbers}\windrconfig.exe
- %User Temp%\{Random Numbers}.exe
- %Program Data%\{Random}\windrvconfig.exe
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows XP, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %Common Startup% is the startup folder for all users, which is usually C:\Documents and Settings\All Users\Start Menu\Programs\Startup on Windows 2000, XP, and Server 2003, or C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, and 8.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
Autostart Technique
This Worm creates the following registry entries to enable automatic execution of dropped component at every system startup:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Windows Services = "%Windows%\{Random Number}\winsvcs.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Windows Services = "%Windows%\{Random Number}\winsvcs.exe"
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
WDrvConfiguration = "%Windows%\{Random Numbers}\windrvconfig.exe"
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
WDrvConfiguration = "%Windows%\{Random Numbers}\windrvconfig.exe"
Other System Modifications
This Worm modifies the following registry entries:
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows Defender\Real-Time Protection
DisableScanOnRealtimeEnable = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows Defender\Real-Time Protection
DisableOnAccessProtection = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Policies\
Microsoft\Windows Defender\Real-Time Protection
DisableBehaviorMonitoring = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_CURRENT_USER\Software\Microsoft\
Windwos\CurrentVersion\Policies\
System
DisableTaskMgr = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_CURRENT_USER\Software\Microsoft\
Windwos\CurrentVersion\Policies\
System
DisableRegistryTools = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
AntiVirusOverride = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
UpdatesOverride = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
FirewallOverride = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
AntiVirusDisableNotify = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
UpdatesDisableNotify = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
AutoUpdateDisableNotify = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_LOCAL_MACHINE\Software\Microsoft\
Security Center
FirewallDisableNotify = "1"
(Note: The default value data of the said registry entry is "0".)
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\SystemRestore
DisableSR = "1"
(Note: The default value data of the said registry entry is "0".)
Propagation
This Worm drops the following copy(ies) of itself in all removable drives:
- {Removable Drive}:\_\DeviceManager.exe
Other Details
This Worm connects to the following possibly malicious URL:
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/update.txt
- http://{BLOCKED}sheuesihfo.ru/5.exe
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/5.exe
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/4.exe
- http://{BLOCKED}sheuesihfo.ru/2.exe
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/3.exe
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/2.exe
- http://{BLOCKED}.{BLOCKED}.{BLOCKED}7.153/1.exe
- http://{BLOCKED}ghidy.in/1.exe
- http://{BLOCKED}ghidy.in/2.exe
- http://{BLOCKED}ghidy.in/3.exe
- http://{BLOCKED}ghidy.in/4.exe
- http://{BLOCKED}ghidy.in/5.exe
- http://{BLOCKED}irury.in/1.exe
- http://{BLOCKED}irury.in/2.exe
- http://{BLOCKED}irury.in/3.exe
- http://{BLOCKED}irury.in/4.exe
- http://{BLOCKED}irury.in/5.exe
- http://{BLOCKED}iueiy.in/1.exe
- http://{BLOCKED}iueiy.in/2.exe
- http://{BLOCKED}iueiy.in/3.exe
- http://{BLOCKED}iueiy.in/4.exe
- http://{BLOCKED}iueiy.in/5.exe
- http://{BLOCKED}gueuy.in/1.exe
- http://{BLOCKED}gueuy.in/3.exe
- http://{BLOCKED}gueuy.in/4.exe
- http://{BLOCKED}gueuy.in/5.exe
- http://{BLOCKED}eifiy.in/2.exe
- http://{BLOCKED}eifiy.in/3.exe
- http://{BLOCKED}eifiy.in/5.exe
- http://{BLOCKED}ishfy.in/1.exe
- http://{BLOCKED}ishfy.in/2.exe
- http://{BLOCKED}ishfy.in/3.exe
- http://{BLOCKED}ishfy.in/4.exe
- http://{BLOCKED}ishfy.in/5.exe
SOLUTION
9.850
14.920.03
05 Apr 2019
14.921.00
05 Apr 2019
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
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\Software\Microsoft\Windows\CurrentVersion\Run
- Microsoft Windows Services = "%Windows%\{Random Number}\winsvcs.exe"
- Microsoft Windows Services = "%Windows%\{Random Number}\winsvcs.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Microsoft Windows Services = "%Windows%\{Random Number}\winsvcs.exe"
- Microsoft Windows Services = "%Windows%\{Random Number}\winsvcs.exe"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- WDrvConfiguration = "%Windows%\{Random Numbers}\windrvconfig.exe"
- WDrvConfiguration = "%Windows%\{Random Numbers}\windrvconfig.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- WDrvConfiguration = "%Windows%\{Random Numbers}\windrvconfig.exe"
- WDrvConfiguration = "%Windows%\{Random Numbers}\windrvconfig.exe"
Step 4
Restore this modified 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\Software\Policies\Microsoft\Windows Defender\Real-Time Protection
- DisableScanOnRealtimeEnable = "1"
- DisableScanOnRealtimeEnable = "1"
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection
- DisableScanOnRealtimeEnable = "0"
- DisableScanOnRealtimeEnable = "0"
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection
- DisableOnAccessProtection = "1"
- DisableOnAccessProtection = "1"
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection
- DisableOnAccessProtection = "0"
- DisableOnAccessProtection = "0"
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection
- DisableBehaviorMonitoring = "1"
- DisableBehaviorMonitoring = "1"
- In HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection
- DisableBehaviorMonitoring = "0"
- DisableBehaviorMonitoring = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- DisableTaskMgr = "1"
- DisableTaskMgr = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- DisasbletaskMgr = "0"
- DisasbletaskMgr = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- DisableRegistryTools = "1"
- DisableRegistryTools = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System
- DisableRegistryTools = "0"
- DisableRegistryTools = "0"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- AntiVirusOverride = "1"
- AntiVirusOverride = "1"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- AntiVirusOverride = "0"
- AntiVirusOverride = "0"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- FirewallOverride = "1"
- FirewallOverride = "1"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- FirewallOverride = 0"
- FirewallOverride = 0"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- AntiVirusDisableNotify = "1"
- AntiVirusDisableNotify = "1"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- AntiVirusDisableNotify = "0"
- AntiVirusDisableNotify = "0"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- UpdatesDisableNotify = "1"
- UpdatesDisableNotify = "1"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- UpdatesDisableNotify = "0"
- UpdatesDisableNotify = "0"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- AutoUpdateDisableNotify = "1"
- AutoUpdateDisableNotify = "1"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- AutoUpdateDisableNotify = "0"
- AutoUpdateDisableNotify = "0"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- FirewallDisableNotify = "1"
- FirewallDisableNotify = "1"
- In HKEY_LOCAL_MACHINE\Software\Microsoft\Security Center
- FirewallDisableNotify = "0"
- FirewallDisableNotify = "0"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore
- DisableSR = "1"
- DisableSR = "1"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore
- DisableSR = "0"
- DisableSR = "0"
Step 5
Search and delete this file
- {Removable Drive}:\.lnk
Step 6
Scan your computer with your Trend Micro product to delete files detected as Worm.Win32.DOFOIL.AA. 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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