BKDR_VOLGMER.V

November 17, 2017
 Analysis by: Jennifer Gumban
 ALIASES:

Trojan.Volgmer (Norton), Backdoor:Win32/Joanap (Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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 arrives as a component bundled with malware/grayware packages.

It reads its configuration file that contains commands and data to be sent to a remote server.

  TECHNICAL DETAILS

File Size:

107,008 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

20 Nov 2015

Payload:

Reads backdoor commands

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.

It arrives as a component bundled with malware/grayware packages.

Backdoor Routine

This Backdoor reads its configuration file that contains commands and data to be sent to a remote server.

Other Details

This Backdoor requires the following additional components to properly run:

  • swinrm.ini

It does the following:

  • Uses the following backdoor commands:
    • [Other In]
    • [Bot In]
    • [Relay In]
    • [Accept Thread]
    • Check Cmd
    • Bot Connect
    • [Cmd] - ERROR_CMD
    • [Cmd] - CMD_BOTCMD_CONNLOG_GET
    • [Cmd] - CMD_BLACKLIST_GET
    • [Cmd] - CMD_BLACKLIST_SET
    • [Cmd] - CMD_TIMESYNC
    • [Cmd] - CMD_BOTCMD_SAVE
    • [Cmd] - CMD_BOTCMD_INIT
    • [Cmd] - CMD_GETINFO

  SOLUTION

Minimum Scan Engine:

9.850

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

Scan your computer with your Trend Micro product to delete files detected as BKDR_VOLGMER.V . 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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