File size: 6,257 Bytes
8e95c1c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 | import argparse
import json
import os
import time
import zipfile
from io import BytesIO
from pathlib import Path
import urllib.request
import urllib.parse
BAZAAR_API = "https://mb-api.abuse.ch/api/v1/"
ZIP_PASSWORD = b"infected"
DATASET_DIR = Path(__file__).resolve().parent.parent / "datasets"
MALICIOUS_DIR = DATASET_DIR / "raw" / "malicious"
PE_TAGS = [
"AgentTesla", "AsyncRAT", "RedLine", "Emotet", "NjRAT",
"FormBook", "Remcos", "LokiBot", "GuLoader", "Raccoon",
"Cobalt Strike", "Metasploit", "Sliver", "BruteRatel",
"Ransomware", "Loader", "Dropper",
]
_API_KEY: str | None = None
def _post(payload: dict) -> dict:
data = urllib.parse.urlencode(payload).encode()
req = urllib.request.Request(BAZAAR_API, data=data, method="POST")
req.add_header("User-Agent", "VibeCheck-Fetcher/1.0")
if _API_KEY:
req.add_header("API-KEY", _API_KEY)
with urllib.request.urlopen(req, timeout=30) as resp:
return json.loads(resp.read())
def _download_sample(sha256: str, dest: Path) -> bool:
payload = {"query": "get_file", "sha256_hash": sha256}
data = urllib.parse.urlencode(payload).encode()
req = urllib.request.Request(BAZAAR_API, data=data, method="POST")
req.add_header("User-Agent", "VibeCheck-Fetcher/1.0")
if _API_KEY:
req.add_header("API-KEY", _API_KEY)
try:
with urllib.request.urlopen(req, timeout=60) as resp:
raw = resp.read()
if raw[:2] != b"PK":
return False
with zipfile.ZipFile(BytesIO(raw)) as zf:
zf.extractall(path=dest.parent, pwd=ZIP_PASSWORD)
extracted = [f for f in dest.parent.iterdir() if f.suffix.lower() in {".exe", ".dll", ".sys", ".bin"} and f.name != dest.name]
if extracted:
extracted[0].rename(dest)
return dest.exists()
except Exception as e:
print(f" Download failed for {sha256[:16]}...: {e}")
return False
def get_recent_samples(count: int) -> list[dict]:
selector = min(count, 100)
result = _post({"query": "get_recent", "selector": str(selector)})
if result.get("query_status") != "ok":
return []
return result.get("data", [])
def get_tagged_samples(tag: str, limit: int = 100) -> list[dict]:
result = _post({"query": "get_taginfo", "tag": tag, "limit": str(min(limit, 1000))})
if result.get("query_status") not in ("ok", "tag_not_found"):
return []
return result.get("data") or []
def fetch(count: int, tags: list[str], pe_only: bool, resume: bool, rate_limit: float):
MALICIOUS_DIR.mkdir(parents=True, exist_ok=True)
existing = {f.stem for f in MALICIOUS_DIR.iterdir() if f.is_file()} if resume else set()
print(f" Resume mode: {len(existing)} samples already present")
candidates: list[dict] = []
if tags:
for tag in tags:
print(f" Querying tag: {tag}")
samples = get_tagged_samples(tag, limit=count)
candidates.extend(samples)
print(f" -> {len(samples)} results")
time.sleep(0.5)
else:
print(f" Querying recent samples (up to {count})...")
batches = (count + 99) // 100
for _ in range(batches):
samples = get_recent_samples(100)
candidates.extend(samples)
time.sleep(1.0)
seen = set()
deduped = []
for s in candidates:
h = s.get("sha256_hash", "")
if h and h not in seen:
seen.add(h)
deduped.append(s)
if pe_only:
deduped = [s for s in deduped if s.get("file_type", "").lower() in {"exe", "dll", "sys"}]
print(f"\n {len(deduped)} unique PE candidates after filtering")
downloaded = 0
skipped = 0
failed = 0
for sample in deduped:
if downloaded >= count:
break
sha256 = sample.get("sha256_hash", "")
if not sha256:
continue
if sha256 in existing:
skipped += 1
continue
file_type = sample.get("file_type", "bin").lower()
ext = {"exe": ".exe", "dll": ".dll", "sys": ".sys"}.get(file_type, ".bin")
dest = MALICIOUS_DIR / f"{sha256}{ext}"
tags_str = ", ".join(sample.get("tags") or [])
print(f" [{downloaded + 1}/{count}] {sha256[:16]}... ({file_type}) [{tags_str}]", end=" ")
ok = _download_sample(sha256, dest)
if ok:
print("OK")
downloaded += 1
existing.add(sha256)
else:
print("FAILED")
failed += 1
time.sleep(rate_limit)
print(f"\n Done: {downloaded} downloaded, {skipped} skipped (resume), {failed} failed")
print(f" Total malicious samples in {MALICIOUS_DIR}: {len(list(MALICIOUS_DIR.iterdir()))}")
def main():
parser = argparse.ArgumentParser(description="Fetch malware samples from MalwareBazaar")
parser.add_argument("--count", type=int, default=1000,
help="Number of samples to download (default: 1000)")
parser.add_argument("--tags", nargs="+", default=None,
help="Filter by MalwareBazaar tags (e.g. --tags Emotet AgentTesla)")
parser.add_argument("--pe-only", action="store_true", default=True,
help="Only download PE files (exe/dll/sys) (default: True)")
parser.add_argument("--no-pe-only", dest="pe_only", action="store_false")
parser.add_argument("--resume", action="store_true", default=True,
help="Skip already-downloaded samples (default: True)")
parser.add_argument("--no-resume", dest="resume", action="store_false")
parser.add_argument("--rate-limit", type=float, default=1.0,
help="Seconds between downloads (default: 1.0, be polite)")
args = parser.parse_args()
tags = args.tags or []
print(f"MalwareBazaar Fetcher")
print(f" Target: {args.count} samples")
print(f" Tags: {tags or 'recent (no filter)'}")
print(f" PE only: {args.pe_only}")
print(f" Output: {MALICIOUS_DIR}\n")
fetch(
count=args.count,
tags=tags,
pe_only=args.pe_only,
resume=args.resume,
rate_limit=args.rate_limit,
)
if __name__ == "__main__":
main()
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