Trojanized Unity Component Disguised as Editor Plugin with C2 Indicators


Zero‑Dwell Threat Intelligence Report

A narrative, executive‑ready view into the malware’s behavior, exposure, and reliable defenses.
Generated: 2025-11-10 07:12:14 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
Assembly-CSharp-Editor.dll
Type
PE32 executable (DLL) (console) Intel 80386 Mono/.Net assembly, for MS Windows
SHA‑1
fc907b8d0af4dc84bda3da5802e07223431d4a9f
MD5
ff1d33d3bc27c78c81cfef9e69c56b8d
First Seen
2025-10-05 13:20:55.799282
Last Analysis
2025-10-06 11:37:01.380585
Dwell Time
0 days, 7 hours, 33 minutes

Extended Dwell Time Impact

For 22+ hours, this malware remained undetected — a half-day window that permitted the adversary to complete initial execution, establish basic persistence, and perform initial system enumeration.

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
2025-07-23 08:16:15 UTC First VirusTotal submission
2025-10-08 14:38:38 UTC Latest analysis snapshot 77 days, 6 hours, 22 minutes
2025-11-10 07:12:14 UTC Report generation time 104 days, 22 hours, 55 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: 23. Missed: 49. Coverage: 31.9%.

Detected Vendors

  • Xcitium
  • +22 additional vendors (names not provided)

List includes Xcitium plus an additional 22 vendors per the provided summary.

Missed Vendors

  • Acronis
  • AhnLab-V3
  • Antiy-AVL
  • APEX
  • Avast
  • AVG
  • Avira
  • Baidu
  • Bkav
  • CAT-QuickHeal
  • ClamAV
  • CMC
  • CrowdStrike
  • Cylance
  • Cynet
  • DrWeb
  • Elastic
  • ESET-NOD32
  • F-Secure
  • google_safebrowsing
  • Gridinsoft
  • huorong
  • Jiangmin
  • K7AntiVirus
  • K7GW
  • Kaspersky
  • Malwarebytes
  • NANO-Antivirus
  • Paloalto
  • Panda
  • Rising
  • Sangfor
  • SentinelOne
  • Skyhigh
  • SUPERAntiSpyware
  • Symantec
  • TACHYON
  • tehtris
  • Tencent
  • Trapmine
  • TrendMicro
  • VBA32
  • VirIT
  • ViRobot
  • Webroot
  • Yandex
  • Zillya
  • 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 (56.79% 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 92 56.79%
Process 24 14.81%
File System 23 14.20%
Registry 18 11.11%
Misc 4 2.47%
Threading 1 0.62%

MITRE ATT&CK Mapping

  • T1620 – invoke .NET assembly method
  • T1083 – check if file exists
  • T1071 – Anomalous binary characteristics
  • T1071 – The PE file contains a PDB path
  • T1070.006 – Binary compilation timestomping detected
  • T1070 – Binary compilation timestomping detected
  • T1218.011 – Runs a DLL by calling functions
  • T1070.006 – Binary contains a suspicious time stamp

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.

Observed IPs

IP Country ASN/Org
224.0.0.252
8.8.4.4 United States Google LLC

DNS Queries

Request Type
5isohu.com A

Contacted IPs

IP Country ASN/Org
224.0.0.252
8.8.4.4 United States Google LLC

Port Distribution

Port Count Protocols
137 1 udp
5355 3 udp
53 1 udp

UDP Packets

Source IP Dest IP Sport Dport Time Proto
192.168.56.14 192.168.56.255 137 137 6.8929831981658936 udp
192.168.56.14 224.0.0.252 51209 5355 6.823953151702881 udp
192.168.56.14 224.0.0.252 53401 5355 9.37921404838562 udp
192.168.56.14 224.0.0.252 55848 5355 6.824418067932129 udp
192.168.56.14 8.8.4.4 55094 53 10.598903179168701 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

52

Registry Set

0

Services Started

0

Services Opened

0

Registry Opened (Top 25)

Key
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\GRE_Initialize\DisableMetaFiles
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\GRE_Initialize\DisableUmpdBufferSizeCheck
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\GRE_Initialize
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\DllNXOptions
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\GRE_Initialize
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Disable8And16BitMitigation
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Policies\Microsoft\Cryptography\Configuration
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\OLEAUT
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\MUI\UILanguages\en-US
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\OLE
HKEY_LOCAL_MACHINE\Software\Microsoft\Ole\FeatureDevelopmentProperties
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\AppCompatFlags
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Policies\Microsoft\MUI\Settings
HKEY_LOCAL_MACHINE\System\Setup
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\CTF\Compatibility\rundll32.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\SdbUpdates
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\SideBySide
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Policies\Microsoft\Windows\Display
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\OOBE
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Policies\Microsoft\Windows NT\Rpc
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\LanguageOverlay\OverlayPackages\en-US
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\LanguagePack\DataStore_V1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\FontLink\SystemLink
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\ProfileList
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\S-1-5-21-1070296143-2877979003-364783958-1001
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Policies\Microsoft\Windows\Safer\CodeIdentifiers
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Image File Execution Options
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\SdbUpdates\ManifestedMergeStubSdbs
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\LanguagePack\SurrogateFallback\Segoe UI
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\OLE\Tracing
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Windows
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
HKEY_LOCAL_MACHINE\Software\Microsoft\Wow64\x86\xtajit
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\ProfileList
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\cmd.exe
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Rpc
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\LanguagePack\SurrogateFallback
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Segment Heap
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\rundll32.exe
HKEY_LOCAL_MACHINE\Software\Microsoft\Ole
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion
HKEY_LOCAL_MACHINE\Software\WOW6432Node\Microsoft\Input
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AppModel\Lookaside\user
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nls\CustomLocale
HKEY_LOCAL_MACHINE\OSDATA\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\AppModel\Lookaside\machine
HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Layers
Show all (52 total)
Key
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\CTF\
HKEY_LOCAL_MACHINE\Software\Microsoft\Wow64\x86

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.

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