Trojan.Win32.DANABOT.TIOIBFAS
HEUR:Trojan-Banker.Win32.Danabot.gen (Kaspersky)
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 deletes itself after execution.
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.
Installation
This Trojan adds the following processes:
- %Windows%\SysWOW64\rundll32.exe %User Temp%\763b2ad81a5a7cd5c55c8e1086e8a6176b386688.dll,f0
- %System%\rundll32.exe %All Users Profile%\7FC1332E\1FD77A58.dll,f1 %User Temp%\763b2ad81a5a7cd5c55c8e1086e8a6176b386688.dll@3032
- %Windows%\syswow64\rundll32.exe %All Users Profile%\7FC1332E\4E23BA43.dll,f2 4458A332E9B82FF56A9D22C7A5CF0F74
- %System%\RUNDLL32.EXE %All Users Profile%\7FC1332E\1FD77A58.dll,f2 72D316C1CAD6D793C258DF23A1B24090
- %System%\svchost.exe -k LocalService
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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). )
It creates the following folders:
- %All Users Profile%\7FC1332E\3E0F137E
- %All Users Profile%\7FC1332E
- %All Users Profile%\7FC1332E\1FD8E721
(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). )
Autostart Technique
This Trojan 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\7FC1332E
ImagePath = "%System%\svchost.exe -k LocalService"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\7FC1332E
ImagePath = "%System%\svchost.exe -k LocalService"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E\Parameters
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
Description = "@%SystemRoot%\system32\Sens.dll,-201"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
DisplayName = "@%SystemRoot%\system32\Sens.dll,-200"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
Group = "ProfSvc_Group"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
ObjectName = "LocalSystem"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E\Parameters
ServiceDll = "%All Users Profile%\7FC1332E\1FD77A58.dll"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
ErrorControl = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
Start = "2"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\7FC1332E
Type = "272"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\7FC1332E
DisplayName = "7FC1332E"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\7FC1332E
Start = "SERVICE_AUTO_START"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Svchost
LocalService = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
(Note: The default value data of the said registry entry is {random values}.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control
WaitToKillServiceTimeout = "120000"
(Note: The default value data of the said registry entry is 20000.)
Dropping Routine
This Trojan drops the following files:
- %All Users Profile%\7FC1332E\A98734C8
- %All Users Profile%\7FC1332E\4E23BA43.dll
- %All Users Profile%\7FC1332E\1FD77A58.dll
- %All Users Profile%\7FC1332E\EBC69295
- %All Users Profile%\7FC1332E\1FD8E721\11ED9A5CBE77D087DE957D23CA809CD0
(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). )
Other Details
This Trojan connects to the following possibly malicious URL:
- {BLOCKED}52.254
- {BLOCKED}253.186
- {BLOCKED}123.177
- {BLOCKED}131.76
- {BLOCKED}.247.86
- {BLOCKED}9.70.103
- {BLOCKED}.104.108
- {BLOCKED}.102.75
It deletes itself after execution.
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 Trojan.Win32.DANABOT.TIOIBFAS
- 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 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\7FC1332E
- Parameters
Step 4
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\7FC1332E
- Description = "@%SystemRoot%\system32\Sens.dll,-201"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E
- DisplayName = "@%SystemRoot%\system32\Sens.dll,-200"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E
- Group = "ProfSvc_Group"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E
- ObjectName = "LocalSystem"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E\Parameters
- ServiceDll = "%All Users Profile%\7FC1332E\1FD77A58.dll"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E
- ErrorControl = "1"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E
- Start = "2"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\7FC1332E
- Type = "272"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\7FC1332E
- DisplayName = "7FC1332E"
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\7FC1332E
- Start = "SERVICE_AUTO_START"
Step 5
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\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Svchost
- From: LocalService = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
To: LocalService = ""{random values}""
- From: LocalService = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control
- From: WaitToKillServiceTimeout = "120000"
To: WaitToKillServiceTimeout = ""20000""
- From: WaitToKillServiceTimeout = "120000"
Step 6
Search and delete these components
- %All Users Profile%\7FC1332E\A98734C8
- %All Users Profile%\7FC1332E\4E23BA43.dll
- %All Users Profile%\7FC1332E\1FD77A58.dll
- %All Users Profile%\7FC1332E\EBC69295
- %All Users Profile%\7FC1332E\1FD8E721\11ED9A5CBE77D087DE957D23CA809CD0
Step 7
Search and delete these folders
- %All Users Profile%\7FC1332E\3E0F137E
- %All Users Profile%\7FC1332E
- %All Users Profile%\7FC1332E\1FD8E721
Step 8
Scan your computer with your Trend Micro product to delete files detected as Trojan.Win32.DANABOT.TIOIBFAS. 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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