Trojan.BAT.STOPSERV.AB
Trojan.BAT.Agent.bbx (Kaspersky); Trojan:Win32/Casdet!rfn (Microsoft)
Windows
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
2,158 bytes
BAT
No
25 May 2020
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:
- net stop MSSQLServerADHelper100
- net stop MSSQL$ISARS
- net stop MSSQL$MSFW
- net stop SQLAgent$ISARS
- net stop SQLAgent$MSFW
- net stop SQLBrowser
- net stop ReportServer$ISARS
- net stop SQLWriter
- net stop WinDefend
- net stop mr2kserv
- net stop MSExchangeADTopology
- net stop MSExchangeFBA
- net stop MSExchangeIS
- net stop MSExchangeSA
- net stop ShadowProtectSvc
- net stop SPAdminV4
- net stop SPTimerV4
- net stop SPTraceV4
- net stop SPUserCodeV4
- net stop SPWriterV4
- net stop SPSearch4
- net stop MSSQLServerADHelper100
- net stop IISADMIN
- net stop firebirdguardiandefaultinstance
- net stop ibmiasrw
- net stop QBCFMonitorService
- net stop QBVSS
- net stop QBPOSDBServiceV12
- net stop "IBM Domino Server (CProgramFilesIBMDominodata)"
- net stop "IBM Domino Diagnostics (CProgramFilesIBMDomino)"
- net stop IISADMIN
- net stop "Simply Accounting Database Connection Manager"
- net stop QuickBooksDB1
- net stop QuickBooksDB2
- net stop QuickBooksDB3
- net stop QuickBooksDB4
- net stop QuickBooksDB5
- net stop QuickBooksDB6
- net stop QuickBooksDB7
- net stop QuickBooksDB8
- net stop QuickBooksDB9
- net stop QuickBooksDB10
- net stop QuickBooksDB11
- net stop QuickBooksDB12
- net stop QuickBooksDB13
- net stop QuickBooksDB14
- net stop QuickBooksDB15
- net stop QuickBooksDB16
- net stop QuickBooksDB17
- net stop QuickBooksDB18
- net stop QuickBooksDB19
- net stop QuickBooksDB20
- net stop QuickBooksDB21
- net stop QuickBooksDB22
- net stop QuickBooksDB23
- net stop QuickBooksDB24
- net stop QuickBooksDB25
- taskkill /f /im mysql*
- taskkill /f /im IBM*
- taskkill /f /im bes10*
- taskkill /f /im black*
- taskkill /f /im sql
- taskkill /f /im store.exe
- taskkill /f /im sql*
- taskkill /f /im vee*
- taskkill /f /im postg*
- taskkill /f /im sage*
Other System Modifications
This Trojan modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
services\WinDefend
Start = 4
(Note: The default value data of the said registry entry is 2.)
HKEY_LOCAL_MACHINE\Microsoft\Windows\
CurrentVersion\Policies\System
EnableLUA = 0
(Note: The default value data of the said registry entry is 1.)
HKEY_LOCAL_MACHINE\Policies\Microsoft\
Windows Defender
DisableAntiSpyware = 1
(Note: The default value data of the said registry entry is 0.)
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Control\Terminal Server
fDenyTSConnections = 0
(Note: The default value data of the said registry entry is 1.)
Other Details
This Trojan deletes itself after execution.
SOLUTION
9.850
15.884.07
22 May 2020
15.885.00
23 May 2020
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
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\SYSTEM\ControlSet001\services\WinDefend
- From: Start = 4
To: Start = 2
- From: Start = 4
- In HKEY_LOCAL_MACHINE\Microsoft\Windows\CurrentVersion\Policies\System
- From: EnableLUA = 0
To: EnableLUA = 1
- From: EnableLUA = 0
- In HKEY_LOCAL_MACHINE\Policies\Microsoft\Windows Defender
- From: DisableAntiSpyware = 1
To: DisableAntiSpyware = 0
- From: DisableAntiSpyware = 1
- In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Terminal Server
- From: fDenyTSConnections = 0
To: fDenyTSConnections = 1
- From: fDenyTSConnections = 0
Step 3
Scan your computer with your Trend Micro product to delete files detected as Trojan.BAT.STOPSERV.AB. 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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