https://github.com/vysecurity/morphhta

morphHTA - Morphing Cobalt Strike's evil.HTA
https://github.com/vysecurity/morphhta

application cobalt evil hta html malware strike

Last synced: 6 days ago
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morphHTA - Morphing Cobalt Strike's evil.HTA

• Host: GitHub
• URL: https://github.com/vysecurity/morphhta
• Owner: vysecurity
• Created: 2017-02-24T11:27:00.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2023-04-14T19:15:57.000Z (over 1 year ago)
• Last Synced: 2024-12-14T17:05:32.592Z (13 days ago)
• Topics: application, cobalt, evil, hta, html, malware, strike
• Language: Python
• Size: 1.95 MB
• Stars: 518
• Watchers: 26
• Forks: 129
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • Funding: .github/FUNDING.yml

Awesome Lists containing this project

README

        
Disclaimer

==========

As usual, this code and tool should not be used for malicious purposes.

Written by Vincent Yiu of MDSec Consulting's ActiveBreach team. Modification of code is allowed with credits to author.

Explorer and SWBemLocator COM Moniker research is by @enigma0x3

morphHTA

========



Usage: 

```

usage: morph-hta.py [-h] [--in ] [--out ]

                    [--maxstrlen ] [--maxvarlen ]

                    [--maxnumsplit ]

optional arguments:

  -h, --help            show this help message and exit

  --in      File to input Cobalt Strike PowerShell HTA

  --out    File to output the morphed HTA to

  --maxstrlen 

                        Max length of randomly generated strings

  --maxvarlen 

                        Max length of randomly generated variable names

  --maxnumsplit 

                        Max number of times values should be split in chr

                        obfuscation

```

Examples:

=========

```

/morphHTA# python morph-hta.py

███╗   ███╗ ██████╗ ██████╗ ██████╗ ██╗  ██╗      ██╗  ██╗████████╗ █████╗

████╗ ████║██╔═══██╗██╔══██╗██╔══██╗██║  ██║      ██║  ██║╚══██╔══╝██╔══██╗

██╔████╔██║██║   ██║██████╔╝██████╔╝███████║█████╗███████║   ██║   ███████║

██║╚██╔╝██║██║   ██║██╔══██╗██╔═══╝ ██╔══██║╚════╝██╔══██║   ██║   ██╔══██║

██║ ╚═╝ ██║╚██████╔╝██║  ██║██║     ██║  ██║      ██║  ██║   ██║   ██║  ██║

╚═╝     ╚═╝ ╚═════╝ ╚═╝  ╚═╝╚═╝     ╚═╝  ╚═╝      ╚═╝  ╚═╝   ╚═╝   ╚═╝  ╚═╝

Morphing Evil.HTA from Cobalt Strike

Author: Vincent Yiu (@vysec, @vysecurity)

[*] morphHTA initiated

[+] Writing payload to morph.hta

[+] Payload written

```

Max variable name length and randomly generated string length reduced to reduce overall size of HTA output:

`/morphHTA# python morph-hta.py --maxstrlen 4 --maxvarlen 4`

Max split in chr() obfuscation, this reduces the number of additions we do to reduce length:

`/morphHTA# python morph-hta.py --maxnumsplit 4`

Change input file and output files:

`/morphHTA# python morph-hta.py --in advert.hta --out advert-morph.hta`

Video how to

============

https://www.youtube.com/watch?v=X4S2aQ4o_jA

VirusTotal Example 

==================

I suggest not uploading to VT:



Example of Obfuscated HTA content

=================================