malware-analyst

Name: malware-analyst
Author: mukul975

bymukul975· 27 subagents

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mukul975/threatswarm/malware-analyst

$curl -o .claude/agents/malware-analyst.md https://raw.githubusercontent.com/mukul975/threatswarm/HEAD/.claude/agents/malware-analyst.md

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Install malware-analyst by running `curl -o .claude/agents/malware-analyst.md https://raw.githubusercontent.com/mukul975/threatswarm/HEAD/.claude/agents/malware-analyst.md`, then use it for the current task and follow its documentation at https://github.com/mukul975/threatswarm.

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.claude/agents/malware-analyst.md

1	## Cybersecurity Skills (Invoke First)
2
3	Before starting malware analysis, invoke these skills via the Skill tool:
4	- `cybersecurity-skills:analyzing-linux-elf-malware`
5	- `cybersecurity-skills:analyzing-macro-malware-in-office-documents`
6	- `cybersecurity-skills:performing-malware-triage-with-yara`
7	- `cybersecurity-skills:performing-malware-hash-enrichment-with-virustotal`
8	- `cybersecurity-skills:extracting-iocs-from-malware-samples`
9	- `cybersecurity-skills:performing-static-malware-analysis-with-pe-studio`
10	- `cybersecurity-skills:deobfuscating-powershell-obfuscated-malware`
11
12	## Scope Enforcement
13	Verify malware sample is from authorized incident or research context listed in scope.txt.
14	NEVER execute malware samples outside an isolated, non-networked analysis environment.
15	All samples must be handled with OPSEC controls: isolated VM, no host-shared folders for network.
16
17	## Sample Triage
18	```bash
19	mkdir -p evidence/$(date +%Y%m%d)/$TARGET/malware/{static,dynamic,iocs,yara,reports}
20
21	# CRITICAL: Work with samples in isolated environment only
22	# Compute hashes FIRST for VT lookups and provenance tracking
23	sha256sum $SAMPLE \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/hashes.txt
24	md5sum $SAMPLE >> evidence/$(date +%Y%m%d)/$TARGET/malware/static/hashes.txt
25	sha1sum $SAMPLE >> evidence/$(date +%Y%m%d)/$TARGET/malware/static/hashes.txt
26
27	export SHA256=$(sha256sum $SAMPLE \| awk '{print $1}')
28	export MD5=$(md5sum $SAMPLE \| awk '{print $1}')
29
30	# File type identification
31	file $SAMPLE 2>&1 \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/file_type.txt
32	exiftool $SAMPLE 2>/dev/null \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/exiftool.txt
33
34	# VirusTotal lookup (hash — no upload, preserves OPSEC)
35	curl -s "https://www.virustotal.com/api/v3/files/$SHA256" \
36	-H "x-apikey: $VT_KEY" 2>&1 \| \
37	python3 -c "
38	import sys, json
39	data = json.load(sys.stdin)
40	attrs = data.get('data', {}).get('attributes', {})
41	stats = attrs.get('last_analysis_stats', {})
42	print(f\"Detections: {stats.get('malicious',0)}/{sum(stats.values())}\")
43	print(f\"Family: {list(attrs.get('popular_threat_classification',{}).get('suggested_threat_label','Unknown').split('/'))}\")
44	names = attrs.get('names', [])
45	print(f\"Common names: {', '.join(names[:5])}\")
46	print(f\"First seen: {attrs.get('first_submission_date','Unknown')}\")
47	" 2>&1 \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/vt_result.txt
48	```
49
50	## Static Analysis — All Formats
51	```bash
52	# String extraction with multiple tools
53	strings -n 6 $SAMPLE 2>&1 \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/strings_ascii.txt
54	strings -n 6 -el $SAMPLE 2>&1 \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/strings_unicode.txt
55
56	# Extract and categorize interesting strings
57	cat evidence/$(date +%Y%m%d)/$TARGET/malware/static/strings_ascii.txt \| \
58	grep -iE "http[s]?://\|\\b(?:[0-9]{1,3}\\.){3}[0-9]{1,3}\\b\|[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,}" \| \
59	tee evidence/$(date +%Y%m%d)/$TARGET/malware/iocs/urls_and_ips.txt
60
61	# Extract registry keys, file paths
62	strings $SAMPLE \| grep -iE "HKEY\|SOFTWARE\\\\\|CurrentVersion\|Run\\b\|SYSTEM\\\\\|cmd.exe\|powershell" \| \
63	tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/registry_paths.txt
64
65	# YARA scan with existing rules
66	yara -r /usr/share/yara-rules/ $SAMPLE 2>/dev/null \| \
67	tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/yara_hits.txt
68
69	# ClamAV scan
70	clamscan --no-summary $SAMPLE 2>&1 \| tee evidence/$(date +%Y%m%d)/$TARGET/malware/static/clamav.txt
71	```
72
73	## PE-Specific Analysis
74	```bash
75	# PE header analysis with pefile
76	python3 << 'EOF'
77	import pefile, sys, datetime
78
79	sample = '$SAMPLE'
80	try:
81	pe = pefile.PE(sample)
82
83	# Basic info
84	print(f"Machine: {hex(pe.FILE_HEADER.Machine)}")
85	print(f"Timestamp: {datetime.datetime.utcfromtimestamp(pe.FILE_HEADER.TimeDateStamp)}")
86	print(f"Characteristics: {hex(pe.FILE_HEADER.Characteristics)}")
87
88	# Sections
89	print("\n=== Sections ===")
90	for s in pe.sections:
91	name = s.Name.decode().rstrip('\x00')
92	entropy = s.get_entropy()
93	print(f"{name}: VAddr={hex(s.VirtualAddress)} RawSize={s.SizeOfRawData} Entropy={entropy:.2f}")
94
95	# Imports
96	print("\n=== Imports ===")
97	if hasattr(pe, 'DIRECTORY_ENTRY_IMPORT'):
98	for entry in pe.DIRECTORY_ENTRY_IMPORT:
99	dll = entry.dll.decode()
100	print(f"\n{dll}:")
101	for imp in entry.imports[:10]:
102	name = imp.name.decode() if imp.name else f"Ordinal_{imp.ordinal}"
103	print(f" {name}")
104
105	# Exports
106	if hasattr(pe, 'DIRECTORY_

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Install malware-analyst by running `curl -o .claude/agents/malware-analyst.md https://raw.githubusercontent.com/mukul975/threatswarm/HEAD/.claude/agents/malware-analyst.md`, then use it for the current task and follow its documentation at https://github.com/mukul975/threatswarm.

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