Zero‑Dwell Threat Intelligence Report
A narrative, executive‑ready view into the malware’s behavior, exposure, and reliable defenses.
Generated: 2025-12-16 07:06:49 UTC
Executive Overview — What We’re Dealing With
This specimen has persisted long enough to matter. Human experts classified it as Malware, and the telemetry confirms a capable, evasive Trojan with real impact potential.
File
HealingSystemChecker.exe
Type
Generic CIL Executable (.NET, Mono, etc.)
SHA‑1
449b27b49fb2718ba17fd84bf5ee67052b47c541
MD5
6b21dd90492bf6452f9b2d14a41d06d6
First Seen
2025-12-10 17:56:16.606661
Last Analysis
2025-12-10 20:05:08.474068
Dwell Time
0 days, 7 hours, 33 minutes
Extended Dwell Time Impact
For 2+ hours, this malware remained undetected — a limited but sufficient window for the adversary to complete initial execution and establish basic system access.
Comparative Context
Industry studies report a median dwell time closer to 21–24 days. This case represents rapid detection and containment within hours rather than days.
Timeline
| Time (UTC) | Event | Elapsed |
|---|---|---|
| 2025-10-07 17:35:08 UTC | First VirusTotal submission | — |
| 2025-12-14 19:48:11 UTC | Latest analysis snapshot | 68 days, 2 hours, 13 minutes |
| 2025-12-16 07:06:49 UTC | Report generation time | 69 days, 13 hours, 31 minutes |
Why It Matters
Every additional day of dwell time is not just an abstract number — it is attacker opportunity. Each day equates to more time for lateral movement, stealth persistence, and intelligence gathering.
Global Detection Posture — Who Caught It, Who Missed It
VirusTotal engines: 69. Detected as malicious: 55. Missed: 14. Coverage: 79.7%.
Detected Vendors
- Xcitium
- +54 additional vendors (names not provided)
List includes Xcitium plus an additional 54 vendors per the provided summary.
Missed Vendors
- Acronis
- Antiy-AVL
- Baidu
- CMC
- Cynet
- google_safebrowsing
- Gridinsoft
- SUPERAntiSpyware
- TACHYON
- tehtris
- TrendMicro
- Webroot
- Yandex
- Zoner
Why it matters: if any endpoint relies solely on a missed engine, this malware can operate with zero alerts. Prevention‑first controls close that gap regardless of signature lag.
Behavioral Storyline — How the Malware Operates
Intensive file system activity (49.33% of behavior) indicates data harvesting, file encryption, or dropper behavior. The threat is actively searching for and manipulating files across the system.
Behavior Categories (weighted)
Weight values represent the frequency and intensity of malware interactions with specific system components. Higher weights indicate more aggressive targeting of that category. Each operation (registry access, file modification, network connection, etc.) contributes to the category’s total weight, providing a quantitative measure of the malware’s behavioral focus.
| Category | Weight | Percentage |
|---|---|---|
| File System | 128713 | 49.33% |
| Synchronization | 128173 | 49.12% |
| System | 1851 | 0.71% |
| Registry | 1616 | 0.62% |
| Com | 238 | 0.09% |
| Process | 213 | 0.08% |
| Misc | 62 | 0.02% |
| Threading | 54 | 0.02% |
| Device | 16 | 0.01% |
| Services | 4 | 0.00% |
| Hooking | 3 | 0.00% |
| Crypto | 2 | 0.00% |
| Windows | 1 | 0.00% |
MITRE ATT&CK Mapping
- T1620 – load .NET assembly
- T1082 – get hostname
- T1083 – check if directory exists
- T1140 – decode data using Base64 in .NET
- T1012 – query or enumerate registry value
- T1027 – encode data using Base64
- T1620 – invoke .NET assembly method
- T1112 – delete registry value
- T1012 – query or enumerate registry key
- T1222 – set file attributes
- T1113 – capture screenshot
- T1033 – get session user name
- T1087 – get session user name
- T1033 – get session integrity level
- T1083 – get common file path
- T1082 – get number of processors
- T1047 – access WMI data in .NET
- T1083 – check if file exists
Following the Trail — Network & DNS Activity
Outbound activity leans on reputable infrastructure (e.g., CDNs, cloud endpoints) to blend in. TLS sessions and
HTTP calls show routine beaconing and IP‑lookup behavior that can masquerade as normal browsing.
Contacted Domains
| Domain | IP | Country | ASN/Org |
|---|---|---|---|
| www.aieov.com | 76.223.54.146 | United States | Amazon.com, Inc. |
| www.msftncsi.com | 23.200.3.82 | United States | Akamai Technologies, Inc. |
Observed IPs
| IP | Country | ASN/Org |
|---|---|---|
| 224.0.0.252 | — | — |
| 239.255.255.250 | — | — |
| 8.8.4.4 | United States | Google LLC |
| 8.8.8.8 | United States | Google LLC |
DNS Queries
| Request | Type |
|---|---|
| 5isohu.com | A |
| www.msftncsi.com | A |
| www.aieov.com | A |
Contacted IPs
| IP | Country | ASN/Org |
|---|---|---|
| 224.0.0.252 | — | — |
| 239.255.255.250 | — | — |
| 8.8.4.4 | United States | Google LLC |
| 8.8.8.8 | United States | Google LLC |
Port Distribution
| Port | Count | Protocols |
|---|---|---|
| 137 | 1 | udp |
| 138 | 1 | udp |
| 5355 | 6 | udp |
| 53 | 50 | udp |
| 3702 | 1 | udp |
UDP Packets
| Source IP | Dest IP | Sport | Dport | Time | Proto |
|---|---|---|---|---|---|
| 192.168.56.13 | 192.168.56.255 | 137 | 137 | 3.238157033920288 | udp |
| 192.168.56.13 | 192.168.56.255 | 138 | 138 | 9.238096952438354 | udp |
| 192.168.56.13 | 224.0.0.252 | 49311 | 5355 | 5.723545074462891 | udp |
| 192.168.56.13 | 224.0.0.252 | 55150 | 5355 | 3.1671600341796875 | udp |
| 192.168.56.13 | 224.0.0.252 | 58920 | 5355 | 97.31625509262085 | udp |
| 192.168.56.13 | 224.0.0.252 | 60010 | 5355 | 5.177833080291748 | udp |
| 192.168.56.13 | 224.0.0.252 | 62406 | 5355 | 3.1722140312194824 | udp |
| 192.168.56.13 | 224.0.0.252 | 63527 | 5355 | 3.8109629154205322 | udp |
| 192.168.56.13 | 239.255.255.250 | 52252 | 3702 | 3.1757540702819824 | udp |
| 192.168.56.13 | 8.8.4.4 | 50554 | 53 | 127.28548192977905 | udp |
| 192.168.56.13 | 8.8.4.4 | 53518 | 53 | 221.89487195014954 | udp |
| 192.168.56.13 | 8.8.4.4 | 53985 | 53 | 345.3163950443268 | udp |
| 192.168.56.13 | 8.8.4.4 | 54879 | 53 | 7.738600969314575 | udp |
| 192.168.56.13 | 8.8.4.4 | 54881 | 53 | 6.380040884017944 | udp |
| 192.168.56.13 | 8.8.4.4 | 55551 | 53 | 160.08205795288086 | udp |
| 192.168.56.13 | 8.8.4.4 | 55743 | 53 | 330.8482620716095 | udp |
| 192.168.56.13 | 8.8.4.4 | 56086 | 53 | 302.03517603874207 | udp |
| 192.168.56.13 | 8.8.4.4 | 56197 | 53 | 145.67524099349976 | udp |
| 192.168.56.13 | 8.8.4.4 | 56908 | 53 | 359.722177028656 | udp |
| 192.168.56.13 | 8.8.4.4 | 57065 | 53 | 240.28772592544556 | udp |
| 192.168.56.13 | 8.8.4.4 | 57310 | 53 | 65.51938104629517 | udp |
| 192.168.56.13 | 8.8.4.4 | 57415 | 53 | 80.03503894805908 | udp |
| 192.168.56.13 | 8.8.4.4 | 58697 | 53 | 21.925452947616577 | udp |
| 192.168.56.13 | 8.8.4.4 | 59610 | 53 | 269.2222189903259 | udp |
| 192.168.56.13 | 8.8.4.4 | 60543 | 53 | 207.3948049545288 | udp |
| 192.168.56.13 | 8.8.4.4 | 60780 | 53 | 287.6130290031433 | udp |
| 192.168.56.13 | 8.8.4.4 | 60910 | 53 | 98.4252610206604 | udp |
| 192.168.56.13 | 8.8.4.4 | 61004 | 53 | 174.58224606513977 | udp |
| 192.168.56.13 | 8.8.4.4 | 61800 | 53 | 316.53509306907654 | udp |
| 192.168.56.13 | 8.8.4.4 | 62493 | 53 | 51.082133054733276 | udp |
| 192.168.56.13 | 8.8.4.4 | 62849 | 53 | 36.33191704750061 | udp |
| 192.168.56.13 | 8.8.4.4 | 64533 | 53 | 192.97205305099487 | udp |
| 192.168.56.13 | 8.8.4.4 | 64801 | 53 | 112.84772801399231 | udp |
| 192.168.56.13 | 8.8.4.4 | 64886 | 53 | 254.72329592704773 | udp |
| 192.168.56.13 | 8.8.8.8 | 50554 | 53 | 126.28605604171753 | udp |
| 192.168.56.13 | 8.8.8.8 | 53518 | 53 | 220.8943738937378 | udp |
| 192.168.56.13 | 8.8.8.8 | 53985 | 53 | 344.31667399406433 | udp |
| 192.168.56.13 | 8.8.8.8 | 54879 | 53 | 8.737788915634155 | udp |
| 192.168.56.13 | 8.8.8.8 | 54881 | 53 | 7.378889083862305 | udp |
| 192.168.56.13 | 8.8.8.8 | 55551 | 53 | 159.08341598510742 | udp |
| 192.168.56.13 | 8.8.8.8 | 55743 | 53 | 329.84827494621277 | udp |
| 192.168.56.13 | 8.8.8.8 | 56086 | 53 | 301.0353810787201 | udp |
| 192.168.56.13 | 8.8.8.8 | 56197 | 53 | 144.67604303359985 | udp |
| 192.168.56.13 | 8.8.8.8 | 56908 | 53 | 358.72253489494324 | udp |
| 192.168.56.13 | 8.8.8.8 | 57065 | 53 | 239.28624200820923 | udp |
| 192.168.56.13 | 8.8.8.8 | 57310 | 53 | 64.51915287971497 | udp |
| 192.168.56.13 | 8.8.8.8 | 57415 | 53 | 79.03582286834717 | udp |
| 192.168.56.13 | 8.8.8.8 | 58697 | 53 | 20.939023971557617 | udp |
| 192.168.56.13 | 8.8.8.8 | 59610 | 53 | 268.22265005111694 | udp |
| 192.168.56.13 | 8.8.8.8 | 60543 | 53 | 206.39433789253235 | udp |
| 192.168.56.13 | 8.8.8.8 | 60780 | 53 | 286.61363697052 | udp |
| 192.168.56.13 | 8.8.8.8 | 60910 | 53 | 97.42582607269287 | udp |
| 192.168.56.13 | 8.8.8.8 | 61004 | 53 | 173.5822970867157 | udp |
| 192.168.56.13 | 8.8.8.8 | 61800 | 53 | 315.5350320339203 | udp |
| 192.168.56.13 | 8.8.8.8 | 62493 | 53 | 50.08207392692566 | udp |
| 192.168.56.13 | 8.8.8.8 | 62849 | 53 | 35.33341908454895 | udp |
| 192.168.56.13 | 8.8.8.8 | 64533 | 53 | 191.97279500961304 | udp |
| 192.168.56.13 | 8.8.8.8 | 64801 | 53 | 111.84848809242249 | udp |
| 192.168.56.13 | 8.8.8.8 | 64886 | 53 | 253.72309494018555 | udp |
Hunting tip: alert on unknown binaries initiating TLS to IP‑lookup services or unusual CDN endpoints — especially early in execution.
Persistence & Policy — Registry and Services
Registry and service telemetry points to policy awareness and environment reconnaissance rather than noisy persistence. Below is a compact view of the most relevant keys and handles; expand to see the full lists where available.
Registry Opened
71
Registry Set
0
Services Started
0
Services Opened
0
Registry Opened (Top 25)
| Key |
|---|
| HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DevOverrideEnable |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\v4.0_policy.4.0.System.Xml__b77a5c561934e089 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319\SKUs |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Fusion |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion |
| HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CF4CC405-E2C5-4DDD-B3CE-5E7582D8C9FA}\InprocServer32 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\DisableConfigCache |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\policy.10.0.Microsoft.JScript__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{4590F811-1D3A-11D0-891F-00AA004B2E24}\InprocServer32\0x0 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\FeatureSIMD |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\LoggingLevel |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\v4.0_policy.4.0.System.Management__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\Software\Microsoft\WBEM\CIMOM\EnablePrivateObjectHeap |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\Policy\Servicing |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\Policy\v4.0 |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319\WMIDisableCOMSecurity |
| HKEY_LOCAL_MACHINE\Software\Microsoft\WBEM\CIMOM\ObjectLimit |
| HKEY_CLASSES_ROOT\CLSID\{CF4CC405-E2C5-4DDD-B3CE-5E7582D8C9FA}\InprocServer32 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\LogFailures |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\DisableMSIPeek |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\NGen\Policy\v4.0 |
| HKEY_CURRENT_USER\Software\Microsoft\.NETFramework\Policy\Standards |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\UseLegacyV2RuntimeActivationPolicyDefaultValue |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\Release |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\LegacyPolicyTimeStamp |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\policy.4.0.System.Configuration__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\Software\Microsoft\WBEM\CIMOM\IdentifierLimit |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\policy.4.0.System.Management__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\Latest |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\policy.4.0.System__b77a5c561934e089 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\OnlyUseLatestCLR |
| HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{4590F811-1D3A-11D0-891F-00AA004B2E24}\InprocServer32 |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\AppContext |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\UseLegacyIdentityFormat |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\5e51cb019bd67162fa9bf7ec460b91f47873aeae016f5d2355e3c64000a7ff54-dropped.bin.exe |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\policy.4.0.System.Xml__b77a5c561934e089 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\DownloadCacheQuotaInKB |
| HKEY_CLASSES_ROOT\CLSID\{4590F811-1D3A-11D0-891F-00AA004B2E24}\InprocServer32 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\CLRLoadLogDir |
| HKEY_LOCAL_MACHINE\Software\Microsoft\WBEM\CIMOM\ProcessID |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default |
| HKEY_CLASSES_ROOT\CLSID\{4590F811-1D3A-11D0-891F-00AA004B2E24}\InprocServer32\0x0 |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full |
| HKEY_LOCAL_MACHINE\Software\Microsoft\WBEM\CIMOM\ContextLimit |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\FileInUseRetryAttempts |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\UseRyuJIT |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\InstallRoot |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\v4.0_policy.4.0.System__b77a5c561934e089 |
Show all (71 total)
| Key |
|---|
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\v4.0.30319 |
| HKEY_CLASSES_ROOT\CLSID\{CF4CC405-E2C5-4DDD-B3CE-5E7582D8C9FA}\InprocServer32\0x0 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\Policy\Standards\v4.0.30319 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\StrongName |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\Policy |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\CacheLocation |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\v4.0_policy.10.0.Microsoft.JScript__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\Software\Microsoft\WBEM\CIMOM |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\v4.0_policy.4.0.System.Configuration__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\index9 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\FileInUseMillisecondsBetweenRetries |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\Policy\APTCA |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\ForceLog |
| HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Fusion\NoClientChecks |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\EnableLog |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\NGen\Policy\v4.0\OptimizeUsedBinaries |
| HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319\SKUs\default |
| HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CF4CC405-E2C5-4DDD-B3CE-5E7582D8C9FA}\InprocServer32\0x0 |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\v4.0_policy.4.0.System.Configuration.Install__b03f5f7f11d50a3a |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\LogResourceBinds |
| HKEY_LOCAL_MACHINE\Software\Microsoft\Fusion\PublisherPolicy\Default\policy.4.0.System.Configuration.Install__b03f5f7f11d50a3a |
Registry Set (Top 25)
Services Started (Top 15)
Services Opened (Top 15)
What To Do Now — Practical Defense Playbook
- Contain unknowns: block first‑run binaries by default — signatures catch up, containment works now.
- EDR controls: alert on keyboard hooks, screen capture APIs, VM/sandbox checks, and command‑shell launches.
- Registry watch: flag queries/sets under policy paths (e.g., …\FipsAlgorithmPolicy\*).
- Network rules: inspect outbound TLS to IP‑lookup services and unexpected CDN endpoints.
- Hunt broadly: sweep endpoints for the indicators above and quarantine positives immediately.
Dwell time equals attacker opportunity. Reducing execution privileges and egress shrinks that window even when vendors disagree.