analyzing-banking-trojan-webinjects

analyzing-banking-trojan-webinjects is a skill for Claude Code, Codex from meltedinhex/analyst-ai-pack. It costs 71 tokens per session (679 once invoked), scanned A, original, Apache-2.0.

A static-analysis guide for webinject configurations used by banking trojans, malware that alters banking pages to steal information. It reads the configuration without running the injected code.

In plain words
What is it for?
Use it to parse Zeus-, Gozi-, or Dridex-style configurations, find targeted web addresses and data-exfiltration endpoints, and identify fake fields, form theft, or one-time-code interception.
Why use it?
It turns hard-to-read malware settings into a clear picture of which banks are targeted and how information theft works. It also reduces the risk of accidentally opening malicious HTML or JavaScript.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to parse Zeus-, Gozi-, or Dridex-style configurations, find targeted web addresses and data-exfiltration endpoints, and identify fake fields, form theft, or one-time-code interception.

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Install with agentmods
npx agentmods add skills/meltedinhex/analyst-ai-pack/analyzing-banking-trojan-webinjects
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add meltedinhex/analyst-ai-pack --skill analyzing-banking-trojan-webinjects
Clone the repo
git clone --depth 1 https://github.com/meltedinhex/analyst-ai-pack

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

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README.md
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<a href="https://agentmods.dev/skills/meltedinhex/analyst-ai-pack/analyzing-banking-trojan-webinjects"><img src="https://agentmods.dev/badge/skills/meltedinhex/analyst-ai-pack/analyzing-banking-trojan-webinjects.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 71 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 679 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00071 $0.00679
Opus 5 $0.00036 $0.00340
Sonnet 5 $0.00014 $0.00136
Haiku 4.5 $0.00007 $0.00068

Measured 11d ago against content hash e643862f4f4c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

analyzing-banking-trojan-webinjects scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/analyst.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/analyzing-banking-trojan-webinjects/SKILL.md · 89 lines

What it actually says

Analyzing Banking Trojan Webinjects

When to Use

  • You have a banking trojan webinject config (Zeus/Gozi/Dridex-style set_url/data_before/ data_inject blocks) and want to extract targeted institutions and injected code.
  • You are mapping the web-fraud workflow (form-grabbing, fake fields, MFA interception).

Do not use this to deploy or test injects against live banking sites. This skill parses the config statically and executes nothing.

Prerequisites

  • The decoded webinject config text (decrypt the config first if needed).

Safety & Handling

  • Treat injected JS/HTML as malicious; do not render it. Defang any exfil URLs.

Workflow

Step 1: Parse webinject blocks

python scripts/analyst.py parse webinjects.txt

Parses set_url/data_before/data_inject/data_after blocks into structured entries with the targeted URL pattern and the injected snippet.

Step 2: Extract targets and exfil endpoints

List targeted institution URL patterns and any exfil endpoints referenced by the injected code.

Step 3: Classify the injection technique

Identify form-grabbing, fake additional fields (SSN, PIN, card), and MFA/OTP interception from the injected markup/JS.

Step 4: Defang and report

Defang URLs and summarize targeted banks and theft techniques.

Validation

  • Each webinject block is parsed into target URL + injection.
  • Exfil endpoints in injected code are extracted and defanged.
  • Injection techniques are classified from the snippet content.

Pitfalls

  • Encrypted/packed configs needing decryption before parsing.
  • Wildcard URL patterns matching broadly — note the scope.
  • Obfuscated injected JS hiding the true exfil endpoint.

References

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 11d ago First seen · 89 lines · 71 tokens per session scan A e643862f4f4c

Subscribe to this mod's changes

analyzing-banking-trojan-webinjects is a skill published in the GitHub repository meltedinhex/analyst-ai-pack (22 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 71 tokens to every session and 679 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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