Caldera slack c2 final

[neptunia]

Description

Added the Slack C2 channel of communications to caldera server and the sandcat agent. It is capable of normal operations, payload uploading, and file exfiltration.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)
• This change requires a documentation update

How Has This Been Tested?

It has been ran with various operations on an actual testing Slack workspace to ensure functionality. Unit tests are WIP.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[codecov]

Codecov Report

Merging #2224 (c12444e) into master (a28ab5e) will decrease coverage by 1.13%.
The diff coverage is 34.09%.

@@            Coverage Diff             @@
##           master    #2224      +/-   ##
==========================================
- Coverage   69.24%   68.10%   -1.14%     
==========================================
  Files          88       89       +1     
  Lines        6581     6801     +220     
==========================================
+ Hits         4557     4632      +75     
- Misses       2024     2169     +145     

Impacted Files	Coverage Δ
app/contacts/contact_slack.py	34.09% <34.09%> (ø)

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[uruwhy]

Looks great!

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
27.5% Duplication