TrojanSpy.Win32.URSNIF.THJBBAI
Trojan-Spy.Win32.Ursnif.ajhb (Kaspersky)
Windows
Threat Type: Trojan Spy
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan Spy 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
3,714,560 bytes
EXE
Yes
22 Oct 2019
Arrival Details
This Trojan Spy 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 Spy adds the following processes:
- "%System Root%\Program Files\Internet Explorer\iexplore.exe" -Embedding
- %System%\DllHost.exe /Processid:{F9717507-6651-4EDB-BFF7-AE615179BCCF}
- %System%\svchost.exe -k netsvcs
- %Windows%\Microsoft.NET\Framework\v4.0.30319\mscorsvw.exe
- %System%\svchost.exe -k LocalServiceAndNoImpersonation
- %Windows%\Microsoft.NET\Framework64\v4.0.30319\mscorsvw.exe
- %System%\svchost.exe -k NetworkService
- %System%\sppsvc.exe
- "%System Root%\Program Files\Windows Media Player\wmpnetwk.exe"
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:1872 CREDAT:275457 /prefetch:2
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:1244 CREDAT:275457 /prefetch:2
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:2704 CREDAT:275457 /prefetch:2
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:3768 CREDAT:275457 /prefetch:2
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:3140 CREDAT:275457 /prefetch:2
(Note: %System Root% is the Windows root folder, where it usually is C:\ 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.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It creates the following folders:
- %Application Data%\Microsoft\Windows\DNTException
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host\upnphost
- %All Users Profile%\Microsoft\Windows\Caches
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\Caches
- %Application Data%\Microsoft\Windows\IECompatCache
- %Application Data%\Microsoft\Windows\PrivacIE
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
- %Application Data%\Microsoft\Windows\IECompatUACache
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %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). . %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
Other System Modifications
This Trojan Spy deletes the following files:
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\Caches\{AFBF9F1A-8EE8-4C77-AF34-C647E37CA0D9}.1.ver0x0000000000000000.db
- %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
UPnP Device Host\HTTP Server\VROOTS\
/upnphost
(Default) = "{random characters}"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
UPnP Device Host\Description\{262DFC30-A9EC-4089-AE41-1DD542D7E10C}\
UDN Mappings\uuid:32d0d20f-2613-46a1-add3-5198c3d6a24d
(Default) = "uuid:262dfc30-a9ec-4089-ae41-1dd542d7e10c"
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.)
It deletes the following registry keys:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}\NewInstallPromptCount
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}\CompatBlockPromptCount
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{761497BB-D6F0-462C-B6EB-D4DAF1D92D43}\NewInstallPromptCount
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{761497BB-D6F0-462C-B6EB-D4DAF1D92D43}\CompatBlockPromptCount
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{DBC80044-A445-435B-BC74-9C25C1C588A9}\NewInstallPromptCount
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Ext\
Settings\{DBC80044-A445-435B-BC74-9C25C1C588A9}\CompatBlockPromptCount
Dropping Routine
This Trojan Spy drops the following files:
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{EF1159D7-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{DE0D43A2-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{BF332DD3-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{EF1159D5-958A-11E9-B634-005056BC7934}.dat
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host\upnphost\udhisapi.dll
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{BF332DD5-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{99D47365-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{DE0D43A0-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{99D47367-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{CD76ACB9-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{CD76ACB7-958A-11E9-B634-005056BC7934}.dat
(Note: %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Other Details
This Trojan Spy connects to the following possibly malicious URL:
- http://{BLOCKED}e.com/{random path}
- http://go.{BLOCKED}oft.com
- http://api.{BLOCKED}g.com
- http://www.{BLOCKED}g.com
- http://sqm.{BLOCKED}try.microsoft.com
- http://{BLOCKED}cweston.com
- http://{BLOCKED}nioia.com
- http://{BLOCKED}e52v3.com
This report is generated via an automated analysis system.
SOLUTION
9.850
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 TrojanSpy.Win32.URSNIF.THJBBAI
- 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\SOFTWARE\Microsoft\UPnP Device Host\HTTP Server\VROOTS\/upnphost
- (Default) = "{random characters}"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\UPnP Device Host\Description\{262DFC30-A9EC-4089-AE41-1DD542D7E10C}\UDN Mappings\uuid:32d0d20f-2613-46a1-add3-5198c3d6a24d
- (Default) = "uuid:262dfc30-a9ec-4089-ae41-1dd542d7e10c"
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
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{EF1159D7-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{DE0D43A2-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\MSIMGSIZ.DAT
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{BF332DD3-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{EF1159D5-958A-11E9-B634-005056BC7934}.dat
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host\upnphost\udhisapi.dll
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{BF332DD5-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{99D47365-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{DE0D43A0-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Media Player\CurrentDatabase_372.wmdb
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{99D47367-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{CD76ACB9-958A-11E9-B634-005056BC7934}.dat
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{CD76ACB7-958A-11E9-B634-005056BC7934}.dat
Step 6
Search and delete these folders
- %Application Data%\Microsoft\Windows\DNTException
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host\upnphost
- %All Users Profile%\Microsoft\Windows\Caches
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft
- %Windows%\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\Caches
- %Application Data%\Microsoft\Windows\IECompatCache
- %Application Data%\Microsoft\Windows\PrivacIE
- %Windows%\ServiceProfiles\LocalService\AppData\Roaming\Microsoft\UPnP Device Host
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
- %Application Data%\Microsoft\Windows\IECompatUACache
Step 7
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.URSNIF.THJBBAI. 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%\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Windows\Caches\{AFBF9F1A-8EE8-4C77-AF34-C647E37CA0D9}.1.ver0x0000000000000000.db
- %AppDataLocal%Low\Microsoft\Internet Explorer\Services\search_{0633EE93-D776-472f-A0FF-E1416B8B2E3A}.ico
Step 9
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}
- NewInstallPromptCount
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{72853161-30C5-4D22-B7F9-0BBC1D38A37E}
- CompatBlockPromptCount
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{761497BB-D6F0-462C-B6EB-D4DAF1D92D43}
- NewInstallPromptCount
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{761497BB-D6F0-462C-B6EB-D4DAF1D92D43}
- CompatBlockPromptCount
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{DBC80044-A445-435B-BC74-9C25C1C588A9}
- NewInstallPromptCount
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Ext\Settings\{DBC80044-A445-435B-BC74-9C25C1C588A9}
- CompatBlockPromptCount
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