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Data Theft Repackaged: A Case Study in Malicious Wrapper Packages on npm
The Socket Research Team breaks down a malicious wrapper package that uses obfuscation to harvest credentials and exfiltrate sensitive data.
slimta
is a configurable MTA based on the python-slimta
libraries. While
the purpose of the python-slimta
library is to avoid configuration files and
allow full control via Python code, the slimta
project recognizes that not
everyone will want or need that level of control. Setup, configuration, and
execution of slimta
is designed to be familiar to non-programmers.
The slimta
project is released under the MIT License.
Install slimta
from PyPi:
$ pip install slimta
Pip should pull in all the required dependencies. Next, we create the basic configuration files:
$ slimta-setup config
This creates 3 files, in ~/.slimta/
or wherever you specified. The sample
configs are designed to work out of the box, so lets give it a shot:
$ slimta --no-daemon
In another terminal, let's connect to port 1025 to see if it's working. After
the banner (the line beginning with 220
), type in QUIT
to end the session:
$ telnet localhost 1025
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 localhost.localdomain ESMTP example.com Mail Delivery Agent
QUIT
221 2.0.0 Bye
Connection closed by foreign host.
Port 1025 is fully capable of accepting mail in the SMTP session, but is
configured by default with the blackhole
relay to silently discard messages.
You can also try it out with the built-in Python SMTP libraries:
>>> import smtplib
>>> smtplib.SMTP('localhost', 1025).sendmail('test@example.com',
['postmaster@example.com'],
'test message')
At this point, we're still a little ways off from where you'd probably like to
be: actually sending and receiving email to the Internet. Please check out the
Usage Manual for information on configuring slimta
to your liking,
including more advanced and custom setups.
Copyright (c) 2021 Ian Good
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Configurable MTA based on the python-slimta library.
We found that slimta demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.
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