โ
Case #365
general.NEW FILE WRITE BYTES SAMPLE GRAB
๐ท๏ธ Analyst Verdict Classification
FP by analyst๐ค AI Analysis
๐ Detections (1)
New Code Atypical Path
high
Rule: general.NEW FILE WRITE BYTES SAMPLE GRAB
Hostname: desktop-atsepsk ยท Sensor: 8f3a47be-5629-4c...
Event Type: NEW_DOCUMENT
Confidence: 95% ยท Verdict: suspicious
Event Data:
FILE_PATH:
C:\Users\Joy Howell\AppData\Local\Temp\{6F053070-C67A-4C51-976C-224B31907C35}-MicrosoftEdge_X64_146.0.3856.59_145.0.3800.97.exe
HASH:
5976bf5345da0ec5d04f749c4b7c31b4c62b6c130dc723fd9ec39b1240bd3a22
PROCESS_ID:
11316
IOCs:
{'type': 'file_path', 'value': 'C:\\Users\\Joy Howell\\AppData\\Local\\Temp\\{6F053070-C67A-4C51-976C-224B31907C35}-MicrosoftEdge_X64_146.0.3856.59_145.0.3800.97.exe'}
{'type': 'hash', 'value': '5976bf5345da0ec5d04f749c4b7c31b4c62b6c130dc723fd9ec39b1240bd3a22'}
Analyst Declaration:
๐ Raw Detection JSON
{
"author": "ckeller@fusioncybersecurity.us",
"cat": "New Code Atypical Path",
"detect": {
"event": {
"FILE_PATH": "C:\\Users\\Joy Howell\\AppData\\Local\\Temp\\{6F053070-C67A-4C51-976C-224B31907C35}-MicrosoftEdge_X64_146.0.3856.59_145.0.3800.97.exe",
"HASH": "5976bf5345da0ec5d04f749c4b7c31b4c62b6c130dc723fd9ec39b1240bd3a22",
"PROCESS_ID": 11316
},
"routing": {
"arch": 2,
"did": "",
"event_id": "b22558cb-334d-422d-9ad3-7cf640558292",
"event_time": 1773581646162,
"event_type": "NEW_DOCUMENT",
"ext_ip": "23.128.32.10",
"hostname": "desktop-atsepsk",
"iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
"int_ip": "192.168.50.200",
"latency": 823,
"moduleid": 2,
"oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
"parent": "15b026aa8514642d084a262969b0ff42",
"plat": 268435456,
"sid": "8f3a47be-5629-4c66-921d-17c39ed07e87",
"tags": [
"fusion-soc-alert",
"fusion-soc-case",
"fusion-soc-pulled",
"fusion-soc-triage",
"fusionsoc-critical",
"fusionsoc-high",
"fusionsoc-investigated",
"joys",
"windows",
"yara_detection_memory"
],
"this": "b2afc997815d5e75087cb5e869b6b54f"
}
},
"detect_id": "fbd672f1-05c8-4dab-a2e1-b2d869b6b54e",
"gen_time": 1773581646985,
"link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/8f3a47be-5629-4c66-921d-17c39ed07e87/timeline?time=1773581646\u0026selected=b2afc997815d5e75087cb5e869b6b54f",
"namespace": "general",
"routing": {
"arch": 2,
"did": "",
"event_id": "b22558cb-334d-422d-9ad3-7cf640558292",
"event_time": 1773581646162,
"event_type": "NEW_DOCUMENT",
"ext_ip": "23.128.32.10",
"hostname": "desktop-atsepsk",
"iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
"int_ip": "192.168.50.200",
"latency": 823,
"moduleid": 2,
"oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
"parent": "15b026aa8514642d084a262969b0ff42",
"plat": 268435456,
"sid": "8f3a47be-5629-4c66-921d-17c39ed07e87",
"tags": [
"fusion-soc-alert",
"fusion-soc-case",
"fusion-soc-pulled",
"fusion-soc-triage",
"fusionsoc-critical",
"fusionsoc-high",
"fusionsoc-investigated",
"joys",
"windows",
"yara_detection_memory"
],
"this": "b2afc997815d5e75087cb5e869b6b54f"
},
"source": "d3541070-8b0e-4663-8a6a-aa0727aacd36.b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175.8f3a47be-5629-4c66-921d-17c39ed07e87.10000000.2",
"source_rule": "general.NEW FILE WRITE BYTES SAMPLE GRAB",
"ts": 1773581646000
}
๐ Threat Intel JSON
{
"virustotal": {
"malicious": false,
"provider": "virustotal",
"reputation": 0,
"stats": {
"confirmed-timeout": 0,
"failure": 0,
"harmless": 0,
"malicious": 0,
"suspicious": 0,
"timeout": 0,
"type-unsupported": 6,
"undetected": 70
}
}
}
๐ค Triage JSON
{
"confidence": 0.95,
"false_positive_reason": "Microsoft Edge installer files in Temp directory are legitimate and expected during browser updates. Historical analyst feedback confirms similar detections are consistently false positives.",
"investigation_questions": [
"Is the user actively installing or updating Microsoft Edge?",
"Has this file been verified through Windows Update logs?"
],
"ioc_analysis": "The file path C:\\Users\\Joy Howell\\AppData\\Local\\Temp\\ indicates a temporary location commonly used by installers. The filename follows Microsoft\u0027s standard naming pattern for Edge updates/installers. Historical analyst feedback consistently marks similar detections as false positives.",
"iocs_extracted": [
{
"type": "file_path",
"value": "C:\\Users\\Joy Howell\\AppData\\Local\\Temp\\{6F053070-C67A-4C51-976C-224B31907C35}-MicrosoftEdge_X64_146.0.3856.59_145.0.3800.97.exe"
},
{
"type": "hash",
"value": "5976bf5345da0ec5d04f749c4b7c31b4c62b6c130dc723fd9ec39b1240bd3a22"
}
],
"mitre_techniques": [],
"recommended_actions": [
"Manual analyst review required \u2014 AI models disagree or one model failed",
"Allow detection to pass without alerting",
"Document this as a known false positive pattern",
"Consider adding to allowlist for Microsoft Edge installers"
],
"risk_score": 10,
"severity": "high",
"summary": "**Vote: SPLIT (1/2 -\u003e SUSPICIOUS)**\n\n### \u264a Gemini Analysis (Primary)\nFailed or timed out.\n\n---\n\n### \ud83e\udd16 Qwen Analysis (Secondary)\n**Verdict:** false_positive | **Confidence:** 0.95\nThis detection is a false positive representing legitimate Microsoft Edge browser installation files in the Temp directory. The file path and naming convention match known Windows installer patterns for Microsoft Edge.\n\n**IOC Analysis:** The file path C:\\Users\\Joy Howell\\AppData\\Local\\Temp\\ indicates a temporary location commonly used by installers. The filename follows Microsoft\u0027s standard naming pattern for Edge updates/installers. Historical analyst feedback consistently marks similar detections as false positives.",
"verdict": "suspicious",
"voting": {
"auto_action": "manual_review",
"mode": "split",
"total_models": 2,
"vote_summary": [
"qwen3.5:4b: false_positive (low, 95% confidence)"
],
"votes": [],
"winning_count": 1,
"winning_verdict": "suspicious"
}
}
โ๏ธ Response Actions
| Action | Target | Status | Result | |
|---|---|---|---|---|
| tag | executed | Tag applied | ||
| recommended | executed | General Activity Sweep: 0 events found | ||
| recommended | executed | General Activity Sweep: 0 events found | ||
| recommended | executed | General Activity Sweep: 0 events found | ||
| recommended | executed | General Activity Sweep: 0 events found |
๐ Add Note
๐ฌ Notes (5)
๐ค FusionSOC AI
2026-03-15T13:36
๐ค FusionSOC AI
2026-03-15T13:36
๐ค FusionSOC AI
2026-03-15T13:36
๐ค FusionSOC AI
2026-03-15T13:36
๐ค FusionSOC AI
2026-03-15T13:36
๐ Timeline
2026-03-18T01:33:40
analyst
Status changed: triaging โ closed
2026-03-18T01:33:35
analyst
Analyst classified as False Positive (FP)
2026-03-15T13:36:08
FusionSOC
Action recommended โ executed: General Activity Sweep: 0 events found
2026-03-15T13:36:08
FusionSOC AI
Note by FusionSOC AI: ## ๐ General Activity Sweep **Action:** Consider adding to allowlist for Microsoft Edge installers **Sensor:** `8f3a47be...
2026-03-15T13:36:08
FusionSOC
Response action queued: recommended on Consider adding to allowlist for Microsoft Edge installers
2026-03-15T13:36:08
FusionSOC
Action recommended โ executed: General Activity Sweep: 0 events found
2026-03-15T13:36:08
FusionSOC AI
Note by FusionSOC AI: ## ๐ General Activity Sweep **Action:** Document this as a known false positive pattern **Sensor:** `8f3a47be-5629-4c......
2026-03-15T13:36:08
FusionSOC
Response action queued: recommended on Document this as a known false positive pattern
2026-03-15T13:36:08
FusionSOC
Action recommended โ executed: General Activity Sweep: 0 events found
2026-03-15T13:36:08
FusionSOC AI
Note by FusionSOC AI: ## ๐ General Activity Sweep **Action:** Allow detection to pass without alerting **Sensor:** `8f3a47be-5629-4c...` **Tim...
2026-03-15T13:36:08
FusionSOC
Response action queued: recommended on Allow detection to pass without alerting
2026-03-15T13:36:08
FusionSOC
Action recommended โ executed: General Activity Sweep: 0 events found
2026-03-15T13:36:08
FusionSOC AI
Note by FusionSOC AI: ## ๐ General Activity Sweep **Action:** Manual analyst review required โ AI models disagree or one model failed **Sensor...
2026-03-15T13:36:08
FusionSOC
Response action queued: recommended on Manual analyst review required โ AI models disagree or one model failed
2026-03-15T13:36:08
FusionSOC
Action tag โ executed: Tag applied
2026-03-15T13:36:07
FusionSOC
Response action queued: tag on 8f3a47be-5629-4c66-921d-17c39ed07e87:fusionsoc-investigated
2026-03-15T13:36:07
FusionSOC AI
Detection fbd672f1-05c8-4dab-a2e1-b2d869b6b54e triaged as suspicious (high severity, confidence: 95%)
2026-03-15T13:36:07
FusionSOC AI
Case created from detection: general.NEW FILE WRITE BYTES SAMPLE GRAB