136 lines
4.5 KiB
Markdown
136 lines
4.5 KiB
Markdown
[](https://github.com/sundowndev/covermyass/actions)
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[](https://coveralls.io/github/sundowndev/covermyass?branch=master)
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[](https://goreportcard.com/report/github.com/sundowndev/covermyass/v2)
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# Introduction
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Covermyass is a post-exploitation tool to cover your tracks on various operating systems. It was designed for penetration testing "covering tracks" phase, before exiting the compromised server. At any time, you can run the tool to find which log files exists on the system, then run again later to erase those files. The tool will tell you which file can be erased with the current user permissions. Files are overwritten repeatedly with random data, in order to make it harder for even very expensive hardware probing to recover the data.
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It supports the three major operating systems (Linux, macOS, Windows) and a few smaller ones (FreeBSD, OpenBSD).
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### Current status ###
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This tool is still in beta. Upcoming versions might bring breaking changes. For now, we're focusing Linux and Darwin support, Windows may come later.
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### Installation ###
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Download the latest release :
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```bash
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curl -sSL https://github.com/sundowndev/covermyass/releases/latest/download/covermyass_linux_amd64 -o ./covermyass
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```
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```bash
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chmod +x ./covermyass
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```
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### Verify digital signatures ###
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covermyass releases are signed using PGP key (rsa4096) with ID `E5BC23488DA8C7AC` and fingerprint `1A662C679AD91F549A77CD96E5BC23488DA8C7AC`. Our key can be retrieved from common keyservers.
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1. Download binary, checksums and signature
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```bash
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curl -L https://github.com/sundowndev/covermyass/releases/latest/download/covermyass_linux_amd64 -o covermyass_linux_amd64 && \
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curl -L https://github.com/sundowndev/covermyass/releases/latest/download/covermyass_SHA256SUMS -o covermyass_SHA256SUMS && \
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curl -L https://github.com/sundowndev/covermyass/releases/latest/download/covermyass_SHA256SUMS.gpg -o covermyass_SHA256SUMS.gpg
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```
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2. Import key
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```bash
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gpg --keyserver https://keys.openpgp.org --recv-keys 0xE5BC23488DA8C7AC
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```
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3. Verify signature (optionally trust the key from gnupg to avoid any warning)
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```bash
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gpg --verify covermyass_SHA256SUMS.gpg covermyass_SHA256SUMS
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```
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4. Verify checksum
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```bash
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sha256sum --ignore-missing -c covermyass_SHA256SUMS
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```
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### Usage ###
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```
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$ covermyass -h
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Usage:
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covermyass [flags]
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Examples:
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Overwrite log files 5 times with a final overwrite with zeros to hide shredding
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covermyass --write -z -n 5
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Flags:
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-f, --filter strings File paths to ignore (supports glob patterns)
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-h, --help help for covermyass
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-n, --iterations int Overwrite N times instead of the default (default 3)
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-l, --list Show files in a simple list format. This will prevent any write operation
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--no-read-only Exclude read-only files in the list. Must be used with --list
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-v, --version version for covermyass
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--write Erase found log files. This WILL shred the files!
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-z, --zero Add a final overwrite with zeros to hide shredding
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```
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First, run an analysis. This will not erase anything.
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```shell
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$ covermyass
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Loaded known log files for linux
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Scanning file system...
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Found the following files
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/var/log/lastlog (29.5 kB, -rw-rw-r--)
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/var/log/btmp (0 B, -rw-rw----)
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/var/log/wtmp (0 B, -rw-rw-r--)
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/var/log/faillog (3.2 kB, -rw-r--r--)
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Summary
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Found 4 files (4 read-write, 0 read-only) in 27ms
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```
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When you acknowledged the results, erase those files.
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```shell
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$ whoami
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root
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$ covermyass --write -n 100
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Loaded known log files for linux
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Scanning file system...
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Found the following files
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/var/log/lastlog (29.5 kB, -rw-rw-r--)
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/var/log/btmp (0 B, -rw-rw----)
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/var/log/wtmp (0 B, -rw-rw-r--)
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/var/log/faillog (3.2 kB, -rw-r--r--)
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Summary
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Found 4 files (4 read-write, 0 read-only) in 27ms
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⣾ Shredding files... (3.1 MB, 1.3 MB/s) [2s]
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Successfully shredded 4 files 100 times
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```
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Filter out some paths :
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```shell
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$ covermyass -f '/foo/**/*.log' -f '/bar/foo.log'
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```
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### License ###
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Covermyass is licensed under the MIT license. Refer to [LICENSE](LICENSE) for more information.
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## Sponsorship
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<div align="center">
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<img src="https://github.com/sundowndev/static/raw/main/sponsors.svg?v=c68eba9" width="100%" heigh="auto" />
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</div>
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