Ransomware Payload Embedding Massive Resource Data For Execution


Zero‑Dwell Threat Intelligence Report

A narrative, executive‑ready view into the malware’s behavior, exposure, and reliable defenses.
Generated: 2025-12-04 08:27:59 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
nv41h2um.exe
Type
Win32 Executable MS Visual C++ (generic)
SHA‑1
55432ceb1fd3fece18f49a46903a3c10ec208568
MD5
2021e7c08a7cff423b7e7f0f41f6fc6c
First Seen
2025-12-01 14:07:32.502031
Last Analysis
2025-12-01 21:28:46.722260
Dwell Time
0 days, 7 hours, 33 minutes

Extended Dwell Time Impact

For 7+ hours, this malware remained undetected — a several-hour window that allowed the adversary to complete initial compromise and begin early-stage persistence establishment.

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
2025-11-25 00:32:22 UTC First VirusTotal submission
2025-12-03 21:11:21 UTC Latest analysis snapshot 8 days, 20 hours, 38 minutes
2025-12-04 08:27:59 UTC Report generation time 9 days, 7 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: 64. Detected as malicious: 57. Missed: 7. Coverage: 89.1%.

Detected Vendors

  • Xcitium
  • +56 additional vendors (names not provided)

List includes Xcitium plus an additional 56 vendors per the provided summary.

Missed Vendors

  • Acronis
  • CMC
  • Google
  • MaxSecure
  • SUPERAntiSpyware
  • TACHYON
  • tehtris

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 (49.73% 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 94723 49.73%
Synchronization 79065 41.51%
System 11326 5.95%
Registry 4216 2.21%
Com 270 0.14%
Misc 265 0.14%
Process 223 0.12%
Device 160 0.08%
Threading 113 0.06%
Services 65 0.03%
Crypto 28 0.01%
Network 24 0.01%
Hooking 6 0.00%
Windows 3 0.00%

MITRE ATT&CK Mapping

  • T1543.003 – create service
  • T1569.002 – create service
  • T1543.003 – modify service
  • T1569.002 – modify service
  • T1543.003 – start service
  • T1027.005 – contain obfuscated stackstrings
  • T1016 – get socket status
  • T1083 – get file size
  • T1543.003 – persist via Windows service
  • T1569.002 – persist via Windows service
  • T1129 – link function at runtime on Windows
  • T1082 – get number of processors

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.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com 104.16.166.228 United States Cloudflare, Inc.
www.aieov.com 13.248.169.48 United States Amazon Technologies 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
www.iuqerfsodp9ifjaposdfjhgosurijfaewrwergwea.com A
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 6 udp
53 34 udp

UDP Packets

Source IP Dest IP Sport Dport Time Proto
192.168.56.14 192.168.56.255 137 137 8.022701978683472 udp
192.168.56.14 224.0.0.252 50710 5355 22.103068113327026 udp
192.168.56.14 224.0.0.252 51209 5355 7.938061952590942 udp
192.168.56.14 224.0.0.252 52815 5355 8.776538133621216 udp
192.168.56.14 224.0.0.252 53401 5355 8.483716011047363 udp
192.168.56.14 224.0.0.252 55848 5355 7.983057022094727 udp
192.168.56.14 224.0.0.252 65148 5355 10.539705038070679 udp
192.168.56.14 8.8.4.4 49916 53 40.820465087890625 udp
192.168.56.14 8.8.4.4 50180 53 84.2576150894165 udp
192.168.56.14 8.8.4.4 50914 53 179.1637499332428 udp
192.168.56.14 8.8.4.4 54579 53 22.09333109855652 udp
192.168.56.14 8.8.4.4 54683 53 131.83187699317932 udp
192.168.56.14 8.8.4.4 55094 53 8.76023006439209 udp
192.168.56.14 8.8.4.4 55827 53 209.2333469390869 udp
192.168.56.14 8.8.4.4 55914 53 69.86766409873962 udp
192.168.56.14 8.8.4.4 56399 53 117.41382813453674 udp
192.168.56.14 8.8.4.4 60117 53 26.445434093475342 udp
192.168.56.14 8.8.4.4 60713 53 223.58608412742615 udp
192.168.56.14 8.8.4.4 62022 53 103.03926515579224 udp
192.168.56.14 8.8.4.4 62112 53 11.092901945114136 udp
192.168.56.14 8.8.4.4 62548 53 164.55489706993103 udp
192.168.56.14 8.8.4.4 62800 53 237.94508600234985 udp
192.168.56.14 8.8.4.4 63205 53 150.10164308547974 udp
192.168.56.14 8.8.4.4 64753 53 55.461045026779175 udp
192.168.56.14 8.8.8.8 49916 53 39.82159399986267 udp
192.168.56.14 8.8.8.8 50180 53 83.26503610610962 udp
192.168.56.14 8.8.8.8 50914 53 178.17752599716187 udp
192.168.56.14 8.8.8.8 54579 53 23.085747957229614 udp
192.168.56.14 8.8.8.8 54683 53 130.8225920200348 udp
192.168.56.14 8.8.8.8 55094 53 9.757820129394531 udp
192.168.56.14 8.8.8.8 55827 53 208.2365710735321 udp
192.168.56.14 8.8.8.8 55914 53 68.8693790435791 udp
192.168.56.14 8.8.8.8 56399 53 116.42483496665955 udp
192.168.56.14 8.8.8.8 60117 53 25.445775985717773 udp
192.168.56.14 8.8.8.8 60713 53 222.58630108833313 udp
192.168.56.14 8.8.8.8 62022 53 102.04136204719543 udp
192.168.56.14 8.8.8.8 62112 53 12.085906028747559 udp
192.168.56.14 8.8.8.8 62548 53 163.56896114349365 udp
192.168.56.14 8.8.8.8 62800 53 236.94618010520935 udp
192.168.56.14 8.8.8.8 63205 53 149.11667609214783 udp
192.168.56.14 8.8.8.8 64753 53 54.466637134552 udp

Hunting tip: alert on unknown binaries initiating TLS to IP‑lookup services or unusual CDN endpoints — especially early in execution.

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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