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building-automated-malware-submission-pipeline Builds an automated malware submission and analysis pipeline that collects suspicious files from endpoints and email gateways, submits them to sandbox environments and multi-engine scanners, and generates verdicts with IOCs for SIEM integration. Use when SOC teams need to scale malware analysis beyond manual sandbox submissions for high-volume alert triage.
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name building-automated-malware-submission-pipeline description Builds an automated malware submission and analysis pipeline that collects suspicious files from endpoints and email gateways, submits them to sandbox environments and multi-engine scanners, and generates verdicts with IOCs for SIEM integration. Use when SOC teams need to scale malware analysis beyond manual sandbox submissions for high-volume alert triage.
domain cybersecurity subdomain soc-operations tags ["soc","malware-analysis","sandbox","automation","virustotal","cuckoo","any-run","pipeline"] version 1.0 author mahipal license Apache-2.0 nist_csf ["DE.CM-01","DE.AE-02","RS.MA-01","DE.AE-06"] mitre_attack ["T1204.002","T1566.001","T1027","T1055","T1497"]
Building Automated Malware Submission Pipeline
When to Use
Use this skill when:
SOC teams face high volume of suspicious file alerts requiring sandbox analysis
Manual sandbox submission creates bottlenecks in alert triage workflow
Endpoint and email security tools quarantine files needing automated verdict determination
Incident response requires rapid malware family identification and IOC extraction
Do not use for analyzing live malware samples in production environments — always use isolated sandbox infrastructure.
Prerequisites
Sandbox environment: Cuckoo Sandbox, Joe Sandbox, Any.Run, or VMRay
VirusTotal API key (Enterprise for submission, free for lookup)
MalwareBazaar API access for known malware lookup
File collection mechanism: EDR quarantine API, email gateway export, network capture
Python 3.8+ with requests, vt-py, pefile libraries
Isolated analysis network with no production connectivity
Workflow
Step 1: Build File Collection Pipeline
Collect suspicious files from multiple sources:
import requests
import hashlib
import os
from pathlib import Path
from datetime import datetime
class MalwareCollector :
def __init__ (self, quarantine_dir="/opt/malware_quarantine" ):
self .quarantine_dir = Path(quarantine_dir)
self .quarantine_dir.mkdir(exist_ok=True )
def collect_from_edr (self, edr_api_url, api_token ):
"""Pull quarantined files from CrowdStrike Falcon"""
headers = {"Authorization" : f"Bearer {api_token} " }
f"{edr_api_url} /quarantine/queries/quarantined-files/v1"
"filter"
"state:'quarantined'"
"limit"
50
"resources"
for
in
f"{edr_api_url} /quarantine/entities/quarantined-files/v1"
"ids"
self
f"{sha256} .sample"
yield
"sha256"
"path"
str
"source"
"edr"
def
collect_from_email_gateway
self, smtp_quarantine_path
"""Pull attachments from email gateway quarantine"""
import
from
import
for
in
"*.eml"
open
"rb"
for
in
if
isinstance
str
or
"unknown"
self
f"{sha256} .sample"
yield
"sha256"
"path"
str
"source"
"email"
"original_filename"
"sender"
"From"
"subject"
"Subject"
def
compute_hashes
self, filepath
"""Calculate MD5, SHA1, SHA256 for a file"""
with
open
"rb"
as
return
"md5"
"sha1"
"sha256"
"size"
len
Step 2: Pre-Screen with Hash Lookups Check if the file is already known before sandbox submission:
import vt
class MalwarePreScreener :
def __init__ (self, vt_api_key, mb_api_url="https://mb-api.abuse.ch/api/v1/" ):
self .vt_client = vt.Client(vt_api_key)
self .mb_api_url = mb_api_url
def check_virustotal (self, sha256 ):
"""Lookup hash in VirusTotal"""
try :
file_obj = self .vt_client.get_object(f"/files/{sha256} " )
stats = file_obj.last_analysis_stats
return {
"found" : True ,
"malicious" : stats.get("malicious" , 0 ),
"suspicious" : stats.get("suspicious" , 0 ),
"undetected" : stats.get("undetected" , 0 ),
"total" : sum (stats.values()),
"threat_label" : getattr (file_obj, "popular_threat_classification" , {}).get(
"suggested_threat_label" , "Unknown"
),
"type" : getattr (file_obj, "type_description" , "Unknown" )
}
except vt.APIError:
return {"found" : False }
def check_malwarebazaar (self, sha256 ):
"""Lookup hash in MalwareBazaar"""
response = requests.post(
self .mb_api_url,
data={"query" : "get_info" , "hash" : sha256}
)
data = response.json()
if data["query_status" ] == "ok" :
entry = data["data" ][0 ]
return {
"found" : True ,
"signature" : entry.get("signature" , "Unknown" ),
"tags" : entry.get("tags" , []),
"file_type" : entry.get("file_type" , "Unknown" ),
"first_seen" : entry.get("first_seen" , "Unknown" )
}
return {"found" : False }
def pre_screen (self, sha256 ):
"""Run all pre-screening checks"""
vt_result = self .check_virustotal(sha256)
mb_result = self .check_malwarebazaar(sha256)
verdict = "UNKNOWN"
if vt_result["found" ] and vt_result.get("malicious" , 0 ) > 10 :
verdict = "KNOWN_MALICIOUS"
elif vt_result["found" ] and vt_result.get("malicious" , 0 ) == 0 :
verdict = "LIKELY_CLEAN"
return {
"sha256" : sha256,
"virustotal" : vt_result,
"malwarebazaar" : mb_result,
"pre_screen_verdict" : verdict,
"needs_sandbox" : verdict == "UNKNOWN"
}
def close (self ):
self .vt_client.close()
Step 3: Submit to Sandbox for Dynamic Analysis Cuckoo Sandbox Submission:
class SandboxSubmitter :
def __init__ (self, cuckoo_url="http://cuckoo.internal:8090" ):
self .cuckoo_url = cuckoo_url
def submit_to_cuckoo (self, filepath, timeout=300 ):
"""Submit file to Cuckoo Sandbox"""
with open (filepath, "rb" ) as f:
response = requests.post(
f"{self.cuckoo_url} /tasks/create/file" ,
files={"file" : f},
data={
"timeout" : timeout,
"options" : "procmemdump=yes,route=none" ,
"priority" : 2 ,
"machine" : "win10_x64"
}
)
task_id = response.json()["task_id" ]
return task_id
def wait_for_analysis (self, task_id, poll_interval=30 , max_wait=600 ):
"""Wait for sandbox analysis to complete"""
import time
elapsed = 0
while elapsed < max_wait:
response = requests.get(f"{self.cuckoo_url} /tasks/view/{task_id} " )
status = response.json()["task" ]["status" ]
if status == "reported" :
return self .get_report(task_id)
elif status == "failed_analysis" :
return {"error" : "Analysis failed" }
time.sleep(poll_interval)
elapsed += poll_interval
return {"error" : "Analysis timed out" }
def get_report (self, task_id ):
"""Retrieve analysis report"""
response = requests.get(f"{self.cuckoo_url} /tasks/report/{task_id} " )
report = response.json()
return {
"task_id" : task_id,
"score" : report.get("info" , {}).get("score" , 0 ),
"signatures" : [
{"name" : s["name" ], "severity" : s["severity" ], "description" : s["description" ]}
for s in report.get("signatures" , [])
],
"network" : {
"dns" : [d["request" ] for d in report.get("network" , {}).get("dns" , [])],
"http" : [
{"url" : h["uri" ], "method" : h["method" ]}
for h in report.get("network" , {}).get("http" , [])
],
"hosts" : report.get("network" , {}).get("hosts" , [])
},
"dropped_files" : [
{"name" : f["name" ], "sha256" : f["sha256" ], "size" : f["size" ]}
for f in report.get("dropped" , [])
],
"processes" : [
{"name" : p["process_name" ], "pid" : p["pid" ], "command_line" : p.get("command_line" , "" )}
for p in report.get("behavior" , {}).get("processes" , [])
],
"registry_keys" : [
k for k in report.get("behavior" , {}).get("summary" , {}).get("regkey_written" , [])
]
}
def submit_to_joesandbox (self, filepath, joe_api_key, joe_url="https://jbxcloud.joesecurity.org/api" ):
"""Submit to Joe Sandbox Cloud"""
with open (filepath, "rb" ) as f:
response = requests.post(
f"{joe_url} /v2/submission/new" ,
headers={"Authorization" : f"Bearer {joe_api_key} " },
files={"sample" : f},
data={
"systems" : "w10_64" ,
"internet-access" : False ,
"report-cache" : True
}
)
return response.json()["data" ]["webid" ]
Step 4: Extract IOCs and Generate Verdict class VerdictGenerator :
def __init__ (self ):
self .malicious_threshold = 7
def generate_verdict (self, pre_screen, sandbox_report ):
"""Combine pre-screening and sandbox results for final verdict"""
iocs = {
"ips" : [],
"domains" : [],
"urls" : [],
"hashes" : [],
"registry_keys" : [],
"files_dropped" : []
}
if sandbox_report:
iocs["domains" ] = sandbox_report.get("network" , {}).get("dns" , [])
iocs["ips" ] = sandbox_report.get("network" , {}).get("hosts" , [])
iocs["urls" ] = [
h["url" ] for h in sandbox_report.get("network" , {}).get("http" , [])
]
iocs["hashes" ] = [
f["sha256" ] for f in sandbox_report.get("dropped_files" , [])
]
iocs["registry_keys" ] = sandbox_report.get("registry_keys" , [])[:10 ]
iocs["files_dropped" ] = sandbox_report.get("dropped_files" , [])
vt_malicious = pre_screen.get("virustotal" , {}).get("malicious" , 0 )
sandbox_score = sandbox_report.get("score" , 0 ) if sandbox_report else 0
sig_count = len (sandbox_report.get("signatures" , [])) if sandbox_report else 0
combined_score = (vt_malicious * 2 ) + (sandbox_score * 10 ) + (sig_count * 5 )
if combined_score >= 100 :
verdict = "MALICIOUS"
confidence = "HIGH"
elif combined_score >= 50 :
verdict = "SUSPICIOUS"
confidence = "MEDIUM"
elif combined_score >= 20 :
verdict = "POTENTIALLY_UNWANTED"
confidence = "LOW"
else :
verdict = "CLEAN"
confidence = "HIGH"
return {
"verdict" : verdict,
"confidence" : confidence,
"combined_score" : combined_score,
"iocs" : iocs,
"vt_detections" : vt_malicious,
"sandbox_score" : sandbox_score,
"signatures" : sandbox_report.get("signatures" , []) if sandbox_report else []
}
Step 5: Push Results to SIEM def push_to_splunk (verdict_result, splunk_url, splunk_token ):
"""Send malware analysis verdict to Splunk HEC"""
import json
event = {
"sourcetype" : "malware_analysis" ,
"source" : "malware_pipeline" ,
"event" : {
"sha256" : verdict_result["sha256" ],
"verdict" : verdict_result["verdict" ],
"confidence" : verdict_result["confidence" ],
"score" : verdict_result["combined_score" ],
"vt_detections" : verdict_result["vt_detections" ],
"sandbox_score" : verdict_result["sandbox_score" ],
"malware_family" : verdict_result.get("threat_label" , "Unknown" ),
"iocs" : verdict_result["iocs" ],
"signatures" : [s["name" ] for s in verdict_result["signatures" ]]
}
}
response = requests.post(
f"{splunk_url} /services/collector/event" ,
headers={
"Authorization" : f"Splunk {splunk_token} " ,
"Content-Type" : "application/json"
},
json=event,
verify=not os.environ.get("SKIP_TLS_VERIFY" , "" ).lower() == "true" ,
)
return response.status_code == 200
def push_iocs_to_blocklist (iocs, firewall_api ):
"""Push extracted IOCs to blocking infrastructure"""
for ip in iocs.get("ips" , []):
requests.post(
f"{firewall_api} /block" ,
json={"type" : "ip" , "value" : ip, "action" : "block" , "source" : "malware_pipeline" }
)
for domain in iocs.get("domains" , []):
requests.post(
f"{firewall_api} /block" ,
json={"type" : "domain" , "value" : domain, "action" : "sinkhole" , "source" : "malware_pipeline" }
)
Step 6: Orchestrate the Full Pipeline def run_malware_pipeline (sample_path, config ):
"""Execute full malware analysis pipeline"""
collector = MalwareCollector()
screener = MalwarePreScreener(config["vt_key" ])
submitter = SandboxSubmitter(config["cuckoo_url" ])
generator = VerdictGenerator()
hashes = collector.compute_hashes(sample_path)
pre_screen = screener.pre_screen(hashes["sha256" ])
sandbox_report = None
if pre_screen["needs_sandbox" ]:
task_id = submitter.submit_to_cuckoo(sample_path)
sandbox_report = submitter.wait_for_analysis(task_id)
verdict = generator.generate_verdict(pre_screen, sandbox_report)
verdict["sha256" ] = hashes["sha256" ]
verdict["threat_label" ] = pre_screen.get("virustotal" , {}).get("threat_label" , "Unknown" )
push_to_splunk(verdict, config["splunk_url" ], config["splunk_token" ])
if verdict["verdict" ] == "MALICIOUS" :
push_iocs_to_blocklist(verdict["iocs" ], config["firewall_api" ])
screener.close()
return verdict
Key Concepts Term Definition Dynamic Analysis Executing malware in a sandbox to observe runtime behavior (process creation, network, file system changes) Static Analysis Examining malware without execution (hash lookup, string analysis, PE header inspection) Sandbox Evasion Techniques malware uses to detect sandbox environments and alter behavior to avoid analysis IOC Extraction Automated process of identifying network indicators, file artifacts, and registry changes from sandbox reports Multi-AV Scanning Submitting samples to multiple antivirus engines (VirusTotal) for consensus-based detection Verdict Final classification of a sample: Malicious, Suspicious, Potentially Unwanted, or Clean
Tools & Systems
Cuckoo Sandbox : Open-source automated malware analysis platform with behavioral analysis and network captureJoe Sandbox : Commercial sandbox with deep behavioral analysis, YARA matching, and MITRE ATT&CK mappingAny.Run : Interactive sandbox service allowing real-time manipulation during analysis for debugging evasive malwareVirusTotal : Multi-engine scanning service providing 70+ AV results and behavioral analysis reportsCAPE Sandbox : Community-maintained Cuckoo fork with enhanced payload extraction and configuration dumping
Common Scenarios
Email Attachment Triage : Auto-submit quarantined email attachments, generate verdict in <5 minutesEDR Quarantine Processing : Batch-process files quarantined by endpoint security for detailed analysisIncident Investigation : Submit suspicious binaries found during IR for malware family identification and IOC extractionThreat Intel Enrichment : Analyze samples from threat feeds to extract C2 infrastructure and update blockingZero-Day Detection : Sandbox catches novel malware missed by signature-based AV through behavioral analysis
Output Format MALWARE ANALYSIS REPORT — Pipeline Submission
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Sample: invoice_march.docx
SHA256: a1b2c3d4e5f6a7b8...
File Type: Microsoft Word Document (macro-enabled)
Pre-Screening:
VirusTotal: 34/72 malicious (Emotet.Downloader)
MalwareBazaar: Tags: emotet, macro, downloader
Sandbox Analysis (Cuckoo):
Score: 9.2/10 (MALICIOUS)
Signatures:
- Macro executes PowerShell download cradle (severity: 8)
- Process injection into explorer.exe (severity: 9)
- Connects to known Emotet C2 server (severity: 9)
Extracted IOCs:
C2 IPs: 185.234.218[.]50:8080, 45.77.123[.]45:443
Domains: update-service[.]evil[.]com
Dropped Files: payload.dll (SHA256: b2c3d4e5...)
Registry: HKCU\Software\Microsoft\Windows\CurrentVersion\Run\Update
VERDICT: MALICIOUS (Emotet Downloader) — Confidence: HIGH
ACTIONS:
[DONE] IOCs pushed to Splunk threat intel
[DONE] C2 IPs blocked on firewall
[DONE] Domain sinkholed on DNS
[DONE] Hash blocked on endpoint
