Backdoor.Win32.SHELMA.AMC
Trojan-Downloader.Win32.Agentb.i (Kaspersky)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Trojan may be downloaded by other malware/grayware from remote 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
4,887,552 bytes
EXE
Yes
10 Jan 2019
Arrival Details
This Trojan may be downloaded by the following malware/grayware from remote sites:
Installation
This Trojan drops the following files:
- %Program Files%\Common Files\xpwpd.dat
- {Executed Malware Directory}\wpd.dat ← configuration file for the initiation of scanning of ports and services
- {Executed Malware Directory}\csrs.exe ← detected as Trojan.Win32.SHELMA.ANM
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), 7 (32-bit), and 8 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), 7 (64-bit), and 8 (64-bit).)
Backdoor Routine
This Trojan executes the following commands from a remote malicious user:
- Scan ports
- Execute Shell Commands
- Download and Execute a Malicious File
It connects to the following websites to send and receive information:
- 45.{BLOCKED}.106
- 66.{BLOCKED}.174
Other Details
This Trojan connects to the following URL(s) to get the affected system's IP address:
- ip.seeip.org
It does the following:
- Brute force Telnet and MSSQL Server by using a dictionary of weak passwords
It executes the following command to disable/stop/delete Windows components:
- sc stop netprofm
- sc config netprofm start= disabled
- sc stop NaSvc
- sc config NlaSvc start= disabled
- net stop WinNsaSrv
- sc config WinNsaSrv start= disabled
- sc stop 1MpsSvc
- sc config 1MpsSvc start= disabled
SOLUTION
9.850
14.744.04
11 Jan 2019
14.745.00
12 Jan 2019
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
Search and delete this file
- %Program Files%\Common Files\xpwpd.dat
- {Executed Malware Directory}\wpd.dat ← configuration file for the initiation of scanning of ports and services
- {Executed Malware Directory}\csrs.exe ← detected as Trojan.Win32.SHELMA.ANM
Step 4
Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win32.SHELMA.AMC. 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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