Skip to main content

​
Overview

The AlienVault Search module provides functions to fetch threat intelligence data from AlienVault Open Threat Exchange (OTX). It implements NIST SP 800-53 Rev. 5 controls for threat intelligence monitoring and risk assessment.

​
NIST SP 800-53 Rev. 5 Controls Implemented

  • SI-4 (Information System Monitoring): Continuous threat intelligence monitoring
  • RA-3 (Risk Assessment): Threat intelligence integration for risk analysis
  • PM-16 (Threat Awareness Program): External threat intelligence consumption
  • SC-7 (Boundary Protection): Secure external threat intelligence API communication
  • AU-3 (Content of Audit Records): Threat intelligence query logging

​
Classes

​
AlienVaultAPIError

class AlienVaultAPIError(Exception):
    pass
Custom exception for AlienVault API related errors.

​
Functions

​
fetch_otx_data()

def fetch_otx_data(
    api_key: str,
    technology: str | None = None,
    industry: str | None = None,
    days: int = 2920,
    max_results: int = 5,
    adversary: str | None = None,
    malware_family: str | None = None,
    tlp: str | None = None,
) -> str
Fetch Threat Intelligence data from AlienVault OTX based on various filtering criteria.
​
api_key
str
required
The API key for accessing the OTX API
​
technology
str | None
default:"None"
The technology of interest for threat intelligence filtering
​
industry
str | None
default:"None"
The industry of interest (used in search query)
​
days
int
default:"2920"
The number of days to look back from today (default is ~8 years)
​
max_results
int
default:"5"
The maximum number of threat intelligence pulses to return
​
adversary
str | None
default:"None"
Filter results by specific adversary name (case-insensitive partial match)
​
malware_family
str | None
default:"None"
Filter results by specific malware family (case-insensitive exact match)
​
tlp
str | None
default:"None"
Filter by TLP (Traffic Light Protocol) level (case-insensitive)
​
return
str
A formatted string containing threat intelligence pulse information including:
  • Industry
  • Pulse name
  • Description
  • Modified date
  • TLP level
  • Adversary
  • Malware families
  • Total pulses found
Returns None if API call fails after retries.

​
Error Handling

Raises:
  • AlienVaultAPIError: For various API-related errors including:
    • No response from OTX API
    • Timeout while searching pulses
    • Rate limit exceeded (HTTP 429)
    • Other HTTP errors
    • Unexpected errors during processing
Behavior:
  • Uses retry logic with exponential backoff (3 attempts by default)
  • Logs all errors through the error handler
  • Returns None on failure rather than raising exceptions
  • Returns “No threat intelligence data found” if no matching pulses exist

​
Filtering Logic

Pulses are filtered by:
  1. Modified date: Must be within specified days parameter
  2. Public status: Only public pulses (public=1)
  3. Adversary: Case-insensitive partial match if specified
  4. Malware family: Case-insensitive exact match if specified
  5. TLP level: Case-insensitive exact match if specified
Results are sorted by modified date (most recent first) and limited to max_results.

​
Example Usage

from alientvault_search import fetch_otx_data

# Basic usage - search by industry
result = fetch_otx_data(
    api_key="your_alienvault_api_key",
    industry="Healthcare",
    max_results=10
)
print(result)

# Advanced filtering by adversary and malware family
result = fetch_otx_data(
    api_key="your_alienvault_api_key",
    industry="Financial Services",
    days=365,  # Last year only
    max_results=5,
    adversary="APT29",
    malware_family="Emotet",
    tlp="white"
)

# Search with technology focus
result = fetch_otx_data(
    api_key="your_alienvault_api_key",
    technology="Apache",
    industry="Technology",
    days=90,  # Last 90 days
    max_results=15
)

​
retry_with_backoff()

def retry_with_backoff(
    func,
    max_retries: int = 3,
    initial_delay: float = 1.0
)
Retry a function with exponential backoff for resilient API communication.
​
func
callable
required
The function to retry (should be a callable with no arguments)
​
max_retries
int
default:"3"
Maximum number of retry attempts
​
initial_delay
float
default:"1.0"
Initial delay in seconds between retry attempts
​
return
any
The result of the function call if successful, or None if all retries fail

​
Error Handling

  • Catches RequestException and Timeout exceptions
  • Logs warnings for each retry attempt
  • Implements exponential backoff (delay doubles after each attempt)
  • Calls error handler on final failure
  • Returns None after exhausting all retries

​
Example Usage

from alientvault_search import retry_with_backoff

def search_operation():
    # Your API call logic here
    return otx.search_pulses(query, max_results=100)

result = retry_with_backoff(
    search_operation,
    max_retries=5,
    initial_delay=2.0
)

​
Implementation Notes

​
Date Filtering

The module uses ISO 8601 format for date filtering: 
modified_since = (datetime.now() - timedelta(days=days)).isoformat()
This ensures only recent threat intelligence is retrieved based on the days parameter.

​
Logging

All functions implement comprehensive logging:
  • API key masking for security (only first 8 characters shown)
  • Debug logs for search queries and date ranges
  • Info logs for pulse counts (found and filtered)
  • Warning logs for processing errors
  • Error handling through centralized error handler

​
Security

  • API keys are masked in all log output
  • Never logs sensitive credentials
  • Implements rate limit handling
  • Uses secure retry logic with exponential backoff
  • Only returns public pulses

​
Traffic Light Protocol (TLP)

The module supports TLP filtering with standard levels:
  • white: Information can be shared publicly
  • green: Community sharing
  • amber: Limited distribution
  • red: No distribution beyond recipients

​
Pulse Structure

Each pulse returned contains:
  • name: Title of the threat intelligence pulse
  • description: Detailed information about the threat
  • modified: Last modification timestamp
  • TLP: Traffic Light Protocol classification
  • adversary: Attributed threat actor
  • malware_families: List of associated malware families
  • public: Visibility status (always 1 for returned results)

Build docs developers (and LLMs) love

Get started for freeTalk to us