默默新聞08

蔡怡婷

Bitcoin mining malware for Linux servers - samples

Research: Dr. Web. Linux.Lady

Sample Credit: Tim Strazzere

MD5 list:

0DE8BCA756744F7F2BDB732E3267C3F4
55952F4F41A184503C467141B6171BA7
86AC68E5B09D1C4B157193BB6CB34007
E2CACA9626ED93C3D137FDF494FDAE7C
E9423E072AD5A31A80A31FC1F525D614

Download. Email me if you need the password.

More information

歡迎蒞臨：https://ofa588.com/

娛樂推薦：https://www.ofa86.com/

蔡怡婷

Welcome back, hope you are enjoying this series, I don't know about you but I'm enjoying it a lot. This is part 3 of the series and in this article we're going to learn some new commands. Let's get started

Command: w
Syntax: w
Function: This simple function is used to see who is currently logged in and what they are doing, that is, their processes.

Command: whoami
Syntax:   whoami
Function: This is another simple command which is used to print the user name associated with the current effective user ID.

Try it and it will show up your user name.

If you want to know information about a particular user no matter whether it is you or someone else there is a command for doing that as well.

Command: finger
Syntax: finger [option] [username]
Function: finger is a user information lookup program. The [] around the arguments means that these arguments are optional this convention is used everywhere in this whole series.

In order to find information about your current user you can simply type:

finger username

Here username is your current username.
To find information about root you can type:

finger root

and it will display info about root user.

Command: uname
Syntax: uname [options]
Function:   uname is used to display information about the system.

uname is mostly used with the flag -a, which means display all information like this:

uname -a

Command: df
Syntax: df [option] [FILE ...]
Function:   df is used to display the amount of space available.
If you type df in your terminal and then hit enter you'll see the used and available space of every drive currently mounted on the system. However the information is displayed in block-size, which is not so much human friendly. But don't worry we can have a human friendly output as well using df by typing:

df -h

the -h flag is used to display the used and available space in a more user friendly format.
We can also view the info of a single drive by specifying the drive name after df like this:

df -h /dev/sda2

That's it for now about df, let's move on.

Command: free
Syntax:   free [options]
Function: free is used to display the amount of free and used physical memory and swap memory in the system.
Again the displayed information is in block-size to get a more human readable format use the -h flag like this:

free -h

Command: cal
Syntax: cal [options]
Function: cal stands for calendar. It is used to display the calendar.

If you want to display current date on the calendar you can simply type:

cal

and wohooo! you get a nice looking calendar on screen with current date marked but what if you want to display calendar of a previous month well you can do that as well. Say you want to display calendar of Jan 2010, then you'll have to type:

cal -d 2010-01

Nice little handy tool, isn't it?

Command: file
Syntax: file filename ...
Function:   file is an awesome tool, it's used to classify a file. It is used to determine the file type.

Let's demonstrate the usage of this command by solving a Noob's CTF challenge using file and base64 commands. We'll talk about base64 command in a bit. Go to InfoSecInstitute CTF Website. What you need to do here is to save the broken image file on your local computer in your home directory. After saving the file open your terminal (if it isn't already). Move to your home directory and then check what type of file it is using the file command:

cd
file image.jpg

Shocking output? The file command has identified the above file as an ASCII text file which means the above file is not an image file rather it is a text file now it's time to see it's contents so we'll type:

cat image.jpg

What is that? It's some kind of gibberish. Well it's base64 encoded text. We need to decode it. Let's learn how to do that.

Command: base64
Syntax:   base64 [option] FILE ...
Function: base64 command is used to encode/decode data and then print it to stdout.

If we're to encode some text in base64 format we'd simply type base64 hit enter and then start typing the text in the terminal after you're done hit enter again and then press CTRL+D like this:

base64
some text here
<CTRL+D>
c29tZSB0ZXh0IGhlcmUK # output - the encoded string

But in the above CTF we've got base64 encoded data we need to decode it, how are we going to do that? It's simple:

base64 -d image.jpg

There you go you've captured the flag.
The -d flag here specifies that we want to decode instead of encode and after it is the name of file we want to decode.

Voila!
So now you're officially a Hacker! Sorry no certificates available here :)

That's it for this article meet ya soon in the upcoming article.

Related news

歡迎蒞臨：https://ofa588.com/

娛樂推薦：https://www.ofa86.com/

蔡怡婷

2020-12-13 Fireeye
Highly Evasive Attacker Leverages SolarWinds Supply Chain to Compromise Multiple Global Victims With SUNBURST Backdoor

The Resurgence of Russian Threat Actor, NOBELIUM

Download (627.7 MB). Email me if you need the password (see in my profile)

Malware Inventory (work in progress)

Reference

I am sure you all saw the news.

Links updated: Jan 19, 2023

2020-12-13 Microsoft

Customer Guidance on Recent Nation-State Cyber Attacks

The Resurgence of Russian Threat Actor, NOBELIUM

Well, here are the Sunburst binaries.

Here is a Sunburst malware analysis walk-through video by Colin Hardy

https://www.youtube.com/watch?v=JoMwrkijTZ8&feature=youtu.be

Hashes

SolarWinds.Orion.Core.BusinessLayer.dll

Trojan:MSIL/Solorigate.B!dha

A Variant Of MSIL/SunBurst.A

SolarWinds.Orion.Core.BusinessLayer.dll

32519b85c0b422e4656de6e6c41878e95fd95026267daab4215ee59c107d6c77

dab758bf98d9b36fa057a66cd0284737abf89857b73ca89280267ee7caf62f3b

eb6fab5a2964c5817fb239a7a5079cabca0a00464fb3e07155f28b0a57a2c0ed

c09040d35630d75dfef0f804f320f8b3d16a481071076918e9b236a321c1ea77

ac1b2b89e60707a20e9eb1ca480bc3410ead40643b386d624c5d21b47c02917c

019085a76ba7126fff22770d71bd901c325fc68ac55aa743327984e89f4b0134

ce77d116a074dab7a22a0fd4f2c1ab475f16eec42e1ded3c0b0aa8211fe858d6

a25cadd48d70f6ea0c4a241d99c5241269e6faccb4054e62d16784640f8e53bc

d3c6785e18fba3749fb785bc313cf8346182f532c59172b69adfb31b96a5d0af

0f5d7e6dfdd62c83eb096ba193b5ae394001bac036745495674156ead6557589

6e4050c6a2d2e5e49606d96dd2922da480f2e0c70082cc7e54449a7dc0d20f8d

CORE-2019.4.5220.20574-SolarWinds-Core-v2019.4.5220-Hotfix5.msp

d0d626deb3f9484e649294a8dfa814c5568f846d5aa02d4cdad5d041a29d5600

appweblogoimagehandler.ashx.b6031896.dll

c15abaf51e78ca56c0376522d699c978217bf041a3bd3c71d09193efa5717c71

TEARDROP

b820e8a2057112d0ed73bd7995201dbed79a79e13c79d4bdad81a22f12387e07

1817a5bf9c01035bcf8a975c9f1d94b0ce7f6a200339485d8f93859f8f6d730c

RAINDROP

be9dbbec6937dfe0a652c0603d4972ba354e83c06b8397d6555fd1847da36725

This is the compromised installer file ( was still on Solarwinds update downloads on Dec 14, 2020)

File size 419.76 MB

CoreInstaller.msi

ad2fbf4add71f61173975989d1a18395afb8538ed889012b9d2e21c19e98bbd1

2020-04-21 17:31:02

SolarWinds Orion Core Services 2020.2

{77E2D294-3D5C-4D93-ADF1-884CCEAD93B0}

File Version Information

Date signed 05:32 PM 04/21/2020

Signers

Solarwinds Worldwide, LLC

Symantec Class 3 SHA256 Code Signing CA

VeriSign

VT - 0 (Dec 14, 2020)

If you unzip, check

019085a76ba7126fff22770d71bd901c325fc68ac55aa743327984e89f4b0134 (36 detections , part of the IOC set)

SolarWinds.Orion.Core.BusinessLayer.dll under OrionCore

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