CryptoLocker Precursor Executable Embeds Overlay Resources and Spreader Traits


Zero‑Dwell Threat Intelligence Report

A narrative, executive‑ready view into the malware’s behavior, exposure, and reliable defenses.
Generated: 2025-11-10 07:12:35 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
jcxqq3.exe
Type
PE32 executable (GUI) Intel 80386, for MS Windows
SHA‑1
fe9cca6052f00ad07c5ba91f6449bba55de32174
MD5
8bcaef3817e7df1d2b37775b8c66aeff
First Seen
2025-10-06 05:58:08.123156
Last Analysis
2025-10-06 07:50:35.638358
Dwell Time
0 days, 7 hours, 33 minutes

Extended Dwell Time Impact

For 1+ 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
2025-10-05 23:49:38 UTC First VirusTotal submission
2025-10-08 14:28:26 UTC Latest analysis snapshot 2 days, 14 hours, 38 minutes
2025-11-10 07:12:35 UTC Report generation time 30 days, 7 hours, 22 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: 73. Detected as malicious: 68. Missed: 5. Coverage: 93.2%.

Detected Vendors

  • Xcitium
  • +67 additional vendors (names not provided)

List includes Xcitium plus an additional 67 vendors per the provided summary.

Missed Vendors

  • Acronis
  • CMC
  • TACHYON
  • TrendMicro
  • Yandex

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 (40.77% 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 274 40.77%
Registry 266 39.58%
File System 45 6.70%
Process 34 5.06%
Device 22 3.27%
Windows 13 1.93%
Synchronization 8 1.19%
Com 6 0.89%
Misc 4 0.60%

MITRE ATT&CK Mapping

  • T1547.001 – reference startup folder
  • T1564.003 – hide graphical window
  • T1027 – encrypt data using RC4 PRGA
  • T1059 – accept command line arguments

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 26 udp

UDP Packets

Source IP Dest IP Sport Dport Time Proto
192.168.56.14 192.168.56.255 137 137 3.0835390090942383 udp
192.168.56.14 224.0.0.252 51209 5355 3.0167219638824463 udp
192.168.56.14 224.0.0.252 53401 5355 4.033999919891357 udp
192.168.56.14 224.0.0.252 55094 5355 5.719778060913086 udp
192.168.56.14 224.0.0.252 55848 5355 3.021312952041626 udp
192.168.56.14 8.8.4.4 49916 53 99.37489700317383 udp
192.168.56.14 8.8.4.4 50180 53 146.51561403274536 udp
192.168.56.14 8.8.4.4 50710 53 66.40638494491577 udp
192.168.56.14 8.8.4.4 52815 53 7.516005039215088 udp
192.168.56.14 8.8.4.4 54579 53 52.01602292060852 udp
192.168.56.14 8.8.4.4 54683 53 193.7039589881897 udp
192.168.56.14 8.8.4.4 55914 53 128.18729710578918 udp
192.168.56.14 8.8.4.4 56399 53 175.39118194580078 udp
192.168.56.14 8.8.4.4 60117 53 80.85942602157593 udp
192.168.56.14 8.8.4.4 62022 53 160.92223501205444 udp
192.168.56.14 8.8.4.4 62112 53 37.31543493270874 udp
192.168.56.14 8.8.4.4 64753 53 113.76613688468933 udp
192.168.56.14 8.8.4.4 65148 53 22.937613010406494 udp
192.168.56.14 8.8.8.8 49916 53 98.37522602081299 udp
192.168.56.14 8.8.8.8 50180 53 145.5166211128235 udp
192.168.56.14 8.8.8.8 50710 53 65.40709900856018 udp
192.168.56.14 8.8.8.8 52815 53 8.516283988952637 udp
192.168.56.14 8.8.8.8 54579 53 51.0156729221344 udp
192.168.56.14 8.8.8.8 54683 53 192.70389890670776 udp
192.168.56.14 8.8.8.8 55914 53 127.18769907951355 udp
192.168.56.14 8.8.8.8 56399 53 174.39148688316345 udp
192.168.56.14 8.8.8.8 60117 53 79.85962796211243 udp
192.168.56.14 8.8.8.8 62022 53 159.92227697372437 udp
192.168.56.14 8.8.8.8 62112 53 36.313230991363525 udp
192.168.56.14 8.8.8.8 64753 53 112.76666688919067 udp
192.168.56.14 8.8.8.8 65148 53 21.93832492828369 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.

Scroll to Top