Dissecting Lynx Ransomware Behavior And Post-Exploitation Impact


Zero‑Dwell Threat Intelligence Report

A narrative, executive‑ready view into the malware’s behavior, exposure, and reliable defenses.
Generated: 2026-01-09 15:09:49 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
04zphke9f.exe
Type
Generic CIL Executable (.NET, Mono, etc.)
SHA‑1
8e2e63ef51e939e19e20274294b3c5715977a56a
MD5
51a8b6d131305dc6cb4fe169231b3012
First Seen
2026-01-08 13:01:40.580725
Last Analysis
2026-01-08 13:06:37.727400
Dwell Time
0 days, 7 hours, 33 minutes

Extended Dwell Time Impact

For 4+ minutes, this malware was rapidly detected — demonstrating excellent security controls that intercepted the threat during initial execution phases, severely limiting adversary capabilities.

Comparative Context

Industry studies report a median dwell time closer to 21–24 days. This case represents extremely rapid detection within minutes.

Timeline

Time (UTC) Event Elapsed
2025-12-17 05:26:12 UTC First VirusTotal submission
2026-01-09 14:20:13 UTC Latest analysis snapshot 23 days, 8 hours, 54 minutes
2026-01-09 15:09:49 UTC Report generation time 23 days, 9 hours, 43 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: 72. Detected as malicious: 55. Missed: 17. Coverage: 76.4%.

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
  • CAT-QuickHeal
  • CMC
  • Cynet
  • Gridinsoft
  • Jiangmin
  • MaxSecure
  • SUPERAntiSpyware
  • TACHYON
  • tehtris
  • VBA32
  • Webroot
  • Yandex
  • ZoneAlarm
  • 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

Dominant system-level operations (47.17% of behavior) suggest this malware performs deep system reconnaissance, privilege escalation, or core OS manipulation. It’s actively probing system defenses and attempting to gain administrative control.

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
System 624 47.17%
Registry 276 20.86%
File System 188 14.21%
Process 134 10.13%
Misc 60 4.54%
Threading 17 1.28%
Synchronization 10 0.76%
Crypto 5 0.38%
Device 5 0.38%
Hooking 3 0.23%
Windows 1 0.08%

MITRE ATT&CK Mapping

  • T1129 – link function at runtime on Windows
  • T1140 – decode data using Base64 in .NET
  • T1620 – load .NET assembly
  • T1082 – Checks available memory
  • T1071 – Yara detections observed in process dumps, payloads or dropped files
  • T1106 – Guard pages use detected – possible anti-debugging.
  • T1055 – Writes to the memory another process
  • T1055 – Creates a process in a suspended state, likely for injection
  • T1027 – The binary likely contains encrypted or compressed data
  • T1027.002 – The binary likely contains encrypted or compressed data

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.

Observed IPs

IP Country ASN/Org
224.0.0.252
8.8.4.4 United States Google LLC
8.8.8.8 United States Google LLC

DNS Queries

Request Type
5isohu.com A
www.aieov.com A

Contacted IPs

IP Country ASN/Org
224.0.0.252
8.8.4.4 United States Google LLC
8.8.8.8 United States Google LLC

Port Distribution

Port Count Protocols
137 1 udp
5355 4 udp
53 4 udp

UDP Packets

Source IP Dest IP Sport Dport Time Proto
192.168.56.14 192.168.56.255 137 137 3.081305980682373 udp
192.168.56.14 224.0.0.252 51209 5355 3.0201680660247803 udp
192.168.56.14 224.0.0.252 53401 5355 4.321043968200684 udp
192.168.56.14 224.0.0.252 55094 5355 5.579339027404785 udp
192.168.56.14 224.0.0.252 55848 5355 3.02034592628479 udp
192.168.56.14 8.8.4.4 52815 53 6.88993501663208 udp
192.168.56.14 8.8.4.4 65148 53 22.329973936080933 udp
192.168.56.14 8.8.8.8 52815 53 7.879079103469849 udp
192.168.56.14 8.8.8.8 65148 53 21.328707933425903 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

101

Registry Set

30

Services Started

0

Services Opened

0

Registry Opened (Top 25)

Key
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\PassiveMode
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize\AppsUseLightTheme
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\CommonW6432Dir
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ProgramFilesDir
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\Defaults\Provider Types\Type 024
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\GpSvcDebugLevel
HKEY_CURRENT_USER\Software\Microsoft\Installer\Assemblies\C:|Users|<USER>|Desktop|executable.exe
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Cryptography\Defaults\Provider Types\Type 024\Name
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\BetaPlatform
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\DefaultAccessPermission
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\ManagedDefenderProductType
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa\FipsAlgorithmPolicy\Enabled
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DevOverrideEnable
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\AMSI\FeatureBits
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{00000134-0000-0000-C000-000000000046}\ProxyStubClsid32\(Default)
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows Defender\MpEngine
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\Release
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Appx
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\DisableAntiVirus
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\InstallLocation
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\NET Framework Setup\NDP\v4\Full\Release
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\.NETFramework\AppContext
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\UserenvDebugLevel
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\System
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{00000134-0000-0000-C000-000000000046}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\CommonFilesDir
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender
HKEY_LOCAL_MACHINE\Software\Classes
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\EnableRemoteManagedDefaults
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers\0\Hashes
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\Managed\S-1-5-21-4005801669-2598574594-602355426-1001\Installer\Assemblies\C:|Users|<USER>|Desktop|executable.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\executable.exe
HKEY_CURRENT_USER\Software\Microsoft\Installer\Assemblies\Global
HKEY_LOCAL_MACHINE\Software\Microsoft\OLE\AppCompat
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\AppCompat\RaiseActivationAuthenticationLevel
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa\FipsAlgorithmPolicy
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\NGen\Policy\v4.0\OptimizeUsedBinaries
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\EnableRemoteManagedDefaults
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows Defender\Features
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers\0\Paths
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\LocalSettingOverrideDisableRealtimeMonitoring
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\CommonFilesDir (x86)
HKEY_LOCAL_MACHINE\SYSTEM\Setup\SystemSetupInProgress
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\DisableConfigCache
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\v4.0.30319\SKUs\default
Show all (101 total)
Key
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa\FipsAlgorithmPolicy\STE
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableLocalAdminMerge
HKEY_LOCAL_MACHINE\Software\Microsoft\RemovalTools\MRT
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Policy Manager
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\InstallRoot
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AppModelUnlock\AllowDevelopmentWithoutDevLicense
HKEY_CURRENT_USER\Software\Microsoft\.NETFramework
HKEY_LOCAL_MACHINE\System\Setup
HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableRealtimeMonitoring
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Policy Manager\
HKEY_LOCAL_MACHINE\Software\Microsoft\AMSI
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ProgramFilesDir (x86)
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Appx\AllowDevelopmentWithoutDevLicense
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\PassiveMode
HKEY_LOCAL_MACHINE\Software\Microsoft\StrongName
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{00000134-0000-0000-C000-000000000046}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\Software\Microsoft\Rpc\Extensions
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\FeatureSIMD
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Rpc\Extensions\NdrOleExtDLL
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\ManagedDefenderProductType
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\OnlyUseLatestCLR
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\OLE
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiSpyware
HKEY_LOCAL_MACHINE\Software\Microsoft\Microsoft Antimalware\MpEngine
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize
HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\NGen\Policy\v4.0
HKEY_LOCAL_MACHINE\Software\Microsoft\AMSI\Providers
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Diagnostics
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\Managed\S-1-5-21-4005801669-2598574594-602355426-1001\Installer\Assemblies\Global
HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers\0\Hashes
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\executable.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319\SKUs\
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\BetaPlatform
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Policy Manager\EnableRemoteManagedDefaults
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ProgramW6432Dir
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\ProductAppDataPath
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Lsa\FipsAlgorithmPolicy\MDMEnabled
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers\262144\Hashes
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Ole\AppCompat\RaiseDefaultAuthnLevel
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\RemovalTools\MRT\GUID
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\.NETFramework\UseLegacyV2RuntimeActivationPolicyDefaultValue
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\DisableAntiVirus
Policy\Standards
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Real-Time Protection

Registry Set (Top 25)

Key Value
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{E7A31A39-AAEA-4FFA-BCE7-4C45042B7077}\DynamicInfo
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{E7A31A39-AAEA-4FFA-BCE7-4C45042B7077}\Hash
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{E7A31A39-AAEA-4FFA-BCE7-4C45042B7077}\Path
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{E7A31A39-AAEA-4FFA-BCE7-4C45042B7077}\Triggers
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Roaming\Id
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Roaming\Index
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASAPI32\ConsoleTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASAPI32\EnableConsoleTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASAPI32\EnableFileTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASAPI32\FileDirectory %windir%\tracing
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASAPI32\FileTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASAPI32\MaxFileSize 1048576
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASMANCS\ConsoleTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASMANCS\EnableConsoleTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASMANCS\EnableFileTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASMANCS\FileDirectory %windir%\tracing
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASMANCS\FileTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\2WGEA7ZRXXRPE2SH_RASMANCS\MaxFileSize 1048576
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASAPI32\ConsoleTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASAPI32\EnableConsoleTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASAPI32\EnableFileTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASAPI32\FileDirectory %windir%\tracing
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASAPI32\FileTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASAPI32\MaxFileSize 1048576
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASMANCS\ConsoleTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASMANCS\EnableConsoleTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASMANCS\EnableFileTracing 0
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASMANCS\FileDirectory %windir%\tracing
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASMANCS\FileTracingMask 4294901760
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Tracing\apiec_RASMANCS\MaxFileSize 1048576

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.

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