โ
Case #4652
general.YARA Detection on Disk
๐ท๏ธ Analyst Verdict Classification
๐ค AI Analysis
๐ Detections (1)
YARA Detection on Disk - Macos_Infostealer_Wallets_8e469ea0
high
Rule: general.YARA Detection on Disk
Hostname: desktop-atsepsk ยท Sensor: 8f3a47be-5629-4c...
Event Type: YARA_DETECTION
Confidence: 53% ยท Verdict: false positive
Event Data:
FILE_PATH:
C:\Program Files (x86)\Microsoft\Edge\Application\148.0.3967.83\msedge.dll
RULE_NAME:
Macos_Infostealer_Wallets_8e469ea0
Analyst Declaration:
๐ Raw Detection JSON
{
"author": "ckeller@fusioncybersecurity.us",
"cat": "YARA Detection on Disk - Macos_Infostealer_Wallets_8e469ea0",
"detect": {
"event": {
"FILE_PATH": "C:\\Program Files (x86)\\Microsoft\\Edge\\Application\\148.0.3967.83\\msedge.dll",
"RULE_NAME": "Macos_Infostealer_Wallets_8e469ea0"
},
"routing": {
"arch": 2,
"did": "",
"event_id": "856922a2-ca7b-4760-ace7-41c131a7f24e",
"event_time": 1779539575382,
"event_type": "YARA_DETECTION",
"ext_ip": "23.128.32.10",
"hostname": "desktop-atsepsk",
"iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
"int_ip": "192.168.50.200",
"latency": 433,
"moduleid": 2,
"oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
"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": "c9ff6930a79345846083ba6f6a119e77"
}
},
"detect_id": "0849c2b9-910b-4cad-8a66-de246a119e77",
"gen_time": 1779539575815,
"link": "https://app.limacharlie.io/orgs/d3541070-8b0e-4663-8a6a-aa0727aacd36/sensors/8f3a47be-5629-4c66-921d-17c39ed07e87/timeline?time=1779539575\u0026selected=c9ff6930a79345846083ba6f6a119e77",
"namespace": "general",
"routing": {
"arch": 2,
"did": "",
"event_id": "856922a2-ca7b-4760-ace7-41c131a7f24e",
"event_time": 1779539575382,
"event_type": "YARA_DETECTION",
"ext_ip": "23.128.32.10",
"hostname": "desktop-atsepsk",
"iid": "b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175",
"int_ip": "192.168.50.200",
"latency": 433,
"moduleid": 2,
"oid": "d3541070-8b0e-4663-8a6a-aa0727aacd36",
"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": "c9ff6930a79345846083ba6f6a119e77"
},
"source": "d3541070-8b0e-4663-8a6a-aa0727aacd36.b2cd59fc-d09d-49e0-a9f2-1fd79ee9c175.8f3a47be-5629-4c66-921d-17c39ed07e87.10000000.2",
"source_rule": "general.YARA Detection on Disk",
"ts": 1779539575000
}
๐ค Triage JSON
{
"confidence": 0.533,
"false_positive_reason": null,
"investigation_questions": [],
"ioc_analysis": "",
"iocs_extracted": [],
"mitre_techniques": [],
"recommended_actions": [
"Manual analyst review required \u2014 AI models (majority)",
"Manual review required"
],
"risk_score": 30,
"severity": "high",
"summary": "**Vote: MAJORITY (2/3 -\u003e FALSE POSITIVE)**\n\n### \ud83e\udd16 qwen3.5:4b Analysis (Secondary + RAG)\n**Verdict:** false_positive | **Confidence:** 0.8\nThe detection of msedge.dll matches a historical pattern of false positives. No suspicious activity was found in the recent process ancestry.\n\n**IOC Analysis:** The file path is consistent with legitimate Microsoft Edge installation. The hash and signature are not provided, but the file is likely benign.\n\n---\n\n### \ud83e\udd16 deepseek-r1:16b Analysis (Secondary + RAG)\n**Verdict:** false_positive | **Confidence:** 0.8\nThe detection event for msedge.dll in the specified file path is likely a false positive. The file is a legitimate Microsoft Edge binary located in the expected Program Files directory. No suspicious activity was found during the investigation.\n\n**IOC Analysis:** The file path C: Program Files (x86) Microsoft Edge Application 148.0.3967.83 msedge.dll is a known legitimate binary from Microsoft. The file is signed and matches expected patterns for system binaries.\n\n---\n\n### \ud83e\udd16 gemma3:4b Analysis (Secondary)\nFailed or timed out.",
"verdict": "false_positive",
"voting": {
"auto_action": "manual_review",
"mode": "majority",
"total_models": 3,
"vote_summary": [
"qwen3.5:35b: true_positive (medium, 0% confidence)",
"qwen3.5:4b +RAG: false_positive (low, 80% confidence)",
"deepseek-r1:16b +RAG: false_positive (informational, 80% confidence)"
],
"votes": [
{
"confidence": 0.0,
"model": "qwen3.5:35b",
"verdict": "true_positive"
},
{
"confidence": 0.8,
"had_rag": true,
"model": "qwen3.5:4b",
"verdict": "false_positive"
},
{
"confidence": 0.8,
"had_rag": true,
"model": "deepseek-r1:16b",
"verdict": "false_positive"
}
],
"winning_count": 2,
"winning_verdict": "false_positive"
}
}
โ๏ธ Response Actions
| Action | Target | Status | Result | |
|---|---|---|---|---|
| tag | executed | Tag applied | ||
| recommended | executed | General Activity Sweep: 0 events found |
๐ Add Note
๐ฌ Notes (3)
๐ค FusionSOC AI
2026-05-23T12:38
๐ค FusionSOC AI
2026-05-23T12:38
๐ค FusionSOC AI
2026-05-23T12:38
๐ Timeline
2026-05-23T12:38:57
FusionSOC AI
Note by FusionSOC AI: ## ๐ณ๏ธ Secondary Vote (RAG-Enhanced) **Vote:** MAJORITY (2/3 โ FALSE POSITIVE) - qwen3.5:35b: true_positive (medium, 0% ...
2026-05-23T12:38:39
FusionSOC AI
Status changed: open โ investigating
2026-05-23T12:38:39
FusionSOC
Action recommended โ executed: General Activity Sweep: 0 events found
2026-05-23T12:38:39
FusionSOC AI
Note by FusionSOC AI: ## ๐ General Activity Sweep **Action:** Manual review required **Sensor:** `8f3a47be-5629-4c...` **Time Window:** +/- 2 ...
2026-05-23T12:38:39
FusionSOC
Response action queued: recommended on Manual review required
2026-05-23T12:38:39
FusionSOC
Action tag โ executed: Tag applied
2026-05-23T12:38:39
FusionSOC
Response action queued: tag on 8f3a47be-5629-4c66-921d-17c39ed07e87:fusionsoc-investigated
2026-05-23T12:38:38
FusionSOC AI
Detection 0849c2b9-910b-4cad-8a66-de246a119e77 triaged as true_positive (medium severity, confidence: 0%)
2026-05-23T12:38:38
FusionSOC AI
Case created from detection: general.YARA Detection on Disk