- Submission details:
- Submission received: 12 September 2017, 00:42:07
- Processing time: 5 min 40 sec
- Submitted sample:
- File MD5: 0x1719456EB90DFEF817FC8E2EA5A5BBA0
- File SHA-1: 0x1233171E360102322D3918F8BCB00A6EE217703E
- Filesize: 257,536 bytes
- Alias & packer info:
- Trojan.Klovbot [Symantec]
- Backdoor.Win32.DarkKomet.eku [Kaspersky Lab]
- Generic.gj [McAfee]
- Mal/Behav-058 [Sophos]
- Trojan.Win32.CDur [Ikarus]
- packed with: UPX [Kaspersky Lab]
|What's been found||Severity Level|
|Hosts file modification that may block access to the security web sites.|
|Produces outbound traffic.|
|Creates a startup registry entry.|
|Contains characteristics of an identified security risk.|
|Possible Security Risk|
- Attention! The following threat categories were identified:
||A malicious backdoor trojan that runs in the background and allows remote access to the compromised system
||A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment
|File System Modifications|
- The following file was created in the system:
|#||Filename(s)||File Size||File Hash||Alias|
[file and pathname of the sample #1]
Backdoor.Win32.DarkKomet.eku [Kaspersky Lab]
packed with UPX [Kaspersky Lab]
- %MyDocuments% is a variable that refers to the file system directory used to physically store a user's common repository of documents. A typical path is C:\Documents and Settings\[UserName]\My Documents.
- The following file was modified:
- %System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
- The following directories were created:
- %AppData% is a variable that refers to the file system directory that serves as a common repository for application-specific data. A typical path is C:\Documents and Settings\[UserName]\Application Data.
- There were new processes created in the system:
|Process Name||Process Filename||Main Module Size|
|[filename of the sample #1]||[file and pathname of the sample #1]||749,568 bytes|
- The following Registry Key was created:
- The newly created Registry Value is:
- MicroUpdate = "%MyDocuments%\MSDCSC\msdcsc.exe"
so that msdcsc.exe runs every time Windows starts
- The following Registry Value was modified:
- [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
- Analysis of the file resources indicate the following possible country of origin:
- To mark the presence in the system, the following Mutex object was created:
- The HOSTS file was updated with the following URL-to-IP mapping:
- The following Host Name was requested from a host database:
- There was registered attempt to establish connection with the remote host. The connection details are:
|Remote Host||Port Number|
- There was application-defined hook procedure installed into the hook chain (e.g. to monitor keystrokes). The installed hook is handled by the following module:
|Outbound traffic (potentially malicious)|
- There was an outbound traffic produced on port 1604:
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