Spyware.Win32.RevealerKeylog.A
Spyware.RevealerKeylog (Symantec); Monitor.Win32.RevealerKeylogger.dx (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Spyware 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
1,647,520 bytes
EXE
Yes
20 Jan 2020
Arrival Details
This Spyware 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 Spyware adds the following processes:
- "%User Temp%\rkfree_setup\rkfree_setup64.exe"
- %User Temp%\rkfree_setup\rkfree_setup64.exe
- %Windows%\sysnative\rvlkl.exe
- "%Program Files%\Internet Explorer\IEXPLORE.EXE" SCODEF:3048 CREDAT:275457 /prefetch:2
(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).. %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:
- %All Users Profile%\rvlkl\users
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
- %Application Data%\Microsoft\Windows\IECompatUACache
- %All Users Profile%\rvlkl\data
- %All Users Profile%\rvlkl\online
- %Application Data%\Microsoft\Windows\PrivacIE
- %User Temp%\rkfree_setup
- %Application Data%\Microsoft\Windows\IECompatCache
- %Application Data%\Microsoft\Windows\DNTException
- %All Users Profile%\rvlkl\export
- %All Users Profile%\rvlkl\upload
- %All Users Profile%\rvlkl\maps
- %All Users Profile%\rvlkl
(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). . %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).. %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).. %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).)
Other System Modifications
This Spyware adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender\Exclusions\Paths\
%System%
rvlkl.exe = "0"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender\Exclusions\Processes\
%System%
rvlkl.exe = "0"
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Run\rvlkl
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Run\rkfree
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 Spyware drops the following files:
- %All Users Profile%\rvlkl:uninst
- %User Temp%\rkfree_setup\rkfree_setup64.exe
- %All Users Profile%\rkfree:uninst
- %All Users Profile%\rvlkl\conf
- %All Users Profile%\rvlkl\conf_
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{D1CF27D6-C716-11E9-AFF8-005056BC4DBC}.dat
- %All Users Profile%\rvlkl\log.css
- %User Temp%\rkfree_setup\eula.txt
- %Windows%\SysWOW64\drivers\rvlkl.sys
- %All Users Profile%\rvlkl:cfg
- %User Temp%\rkfree_setup\rkfree_setup64.exe_
- %All Users Profile%\rkfree:cfg
- %All Users Profile%\Microsoft\Windows\Start Menu\Programs\Startup\rvlkl.lnk
(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). . %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).. %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 Spyware connects to the following possibly malicious URL:
- http://go.{BLOCKED}oft.com
- http://www.{BLOCKED}oft.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 Spyware.Win32.RevealerKeylog.A
- 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\Windows Defender\Exclusions\Paths\%System%
- rvlkl.exe = "0"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Processes\%System%
- rvlkl.exe = "0"
Step 4
Search and delete these components
- %All Users Profile%\rvlkl:uninst
- %User Temp%\rkfree_setup\rkfree_setup64.exe
- %All Users Profile%\rkfree:uninst
- %All Users Profile%\rvlkl\conf
- %All Users Profile%\rvlkl\conf_
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{D1CF27D6-C716-11E9-AFF8-005056BC4DBC}.dat
- %All Users Profile%\rvlkl\log.css
- %User Temp%\rkfree_setup\eula.txt
- %Windows%\SysWOW64\drivers\rvlkl.sys
- %All Users Profile%\rvlkl:cfg
- %User Temp%\rkfree_setup\rkfree_setup64.exe_
- %All Users Profile%\rkfree:cfg
- %All Users Profile%\Microsoft\Windows\Start Menu\Programs\Startup\rvlkl.lnk
Step 5
Search and delete these folders
- %All Users Profile%\rvlkl\users
- %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active
- %Application Data%\Microsoft\Windows\IECompatUACache
- %All Users Profile%\rvlkl\data
- %All Users Profile%\rvlkl\online
- %Application Data%\Microsoft\Windows\PrivacIE
- %User Temp%\rkfree_setup
- %Application Data%\Microsoft\Windows\IECompatCache
- %Application Data%\Microsoft\Windows\DNTException
- %All Users Profile%\rvlkl\export
- %All Users Profile%\rvlkl\upload
- %All Users Profile%\rvlkl\maps
- %All Users Profile%\rvlkl
Step 6
Scan your computer with your Trend Micro product to delete files detected as Spyware.Win32.RevealerKeylog.A. 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 7
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_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
- rvlkl
- In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run
- rkfree
- 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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