BKDR_ISMDOOR.C
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.
TECHNICAL DETAILS
404,992 bytes
EXE
Yes
26 Nov 2016
Connects to URLs/IPs, Compromises system security
Arrival Details
This backdoor 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 backdoor drops the following file(s)/component(s):
- %Application Data%\Microsoft\Windows\Tmp98871
- %Application Data%\Microsoft\Windows\Tmp98872
- %Application Data%\Microsoft\Windows\Tmpedi98871
- %Application Data%\Microsoft\Windows\Tmpedo98871
- %System%\ddd\a1.txt
(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.. %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Backdoor Routine
This backdoor executes the following commands from a remote malicious user:
- General
- DownloadFile
- UploadFile
- ChangeAliveSeconds
It connects to the following websites to send and receive information:
- http://{BLOCKED}e.{BLOCKED}updater.com//Home/{url path}
Where {url path} may be any of the following:- CheckConnection
- SetCommandValue
- Alive
- SaveFile?commandId={command}&CmdResult={result}
- GetFile?commandId={command}
- SaveFile?commandId={command}
SOLUTION
9.800
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
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 3
Restart in Safe Mode
Step 4
Search and delete these files
- %Application Data%\Microsoft\Windows\Tmp98871
- %Application Data%\Microsoft\Windows\Tmp98872
- %Application Data%\Microsoft\Windows\Tmpedi98871
- %Application Data%\Microsoft\Windows\Tmpedo98871
- %System%\ddd\a1.txt
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_ISMDOOR.C. 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.
Step 6
Scan your computer with your Trend Micro product to delete files detected as BKDR_ISMDOOR.C. 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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