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sica-fondt/knowledge/cyber-skills/skills/deobfuscating-powershell-obfuscated-malware/references/standards.md
Claude 24f816b6a3
Consolidate 22 sibling repos into layered organism structure 
Place useful parts of the surrounding repos into sica-fondt by layer, per the
body model (Ada = membrane; brain/endocrine/capabilities/knowledge non-Ada):

- brain/        LLM reasoning + providers (dapr, hermes, MoMoA)
- capabilities/ REPRAG sidecars: hermes tools/skills, dapr tools, parallel
                dispatch, A51 channels, and the OSINT cluster
- knowledge/    LORAG corpus: 754 cyber-skills, agency personas, secure-coding,
                MITRE ATT&CK data
- reference/    defensive threat-reference (C3, shhbruh doc) + AdaYaml parser

License handling: AGPL sources (worldosint, advanced_evolution, mercury,
Reticulum) and GPL DeTTECT are SPEC-only clean-room/port descriptions — no
copyleft code copied. MIT/Apache/data parts copied as working trees.

Safety: shhbruh escape/persistence material and C3 covert-C2 kept as reference
only, not wired into the running organism. See CONSOLIDATION.md.

https://claude.ai/code/session_01UehUqEXXJJCsHoA4voCU5c
2026-06-10 06:53:01 +00:00

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Standards and Frameworks Reference

PowerShell Obfuscation Taxonomy

Layer Classification

Layer Technique Example
L1 Base64 EncodedCommand powershell -enc SQBFAFgA...
L2 String Concatenation $a='Inv'+'oke'+'-Ex'+'pression'
L3 Character Code Array [char[]](73,69,88)-join''
L4 Tick-Mark Insertion I`nv`oke-Exp`ress`ion
L5 Environment Variable $env:COMSPEC[4,15,25]-join''
L6 SecureString ConvertTo-SecureString ... -Key
L7 Compression + Base64 IO.Compression.DeflateStream
L8 XOR Encoding `$bytes
L9 Replace Chain .Replace('abc','I').Replace(...)
L10 Format String ("{2}{0}{1}" -f 'ke-','Ex','Invo')

MITRE ATT&CK Mappings

Technique ID Description
Command and Scripting Interpreter: PowerShell T1059.001 Malicious PowerShell execution
Obfuscated Files or Information T1027 Encoding/encryption of scripts
Deobfuscate/Decode Files T1140 Runtime deobfuscation
Ingress Tool Transfer T1105 Downloading payloads via PS
System Binary Proxy Execution T1218 Using trusted binaries

PowerShell AST Node Types for Analysis

Key Expression Nodes

  • CommandExpression: Direct command invocations
  • InvokeMemberExpression: Method calls on objects
  • BinaryExpression: String concatenation operators
  • ArrayExpression: Character array construction
  • SubExpression: Nested expression evaluation
  • ExpandableStringExpression: String interpolation

References