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XWorm Malware Analysis Report By CyberDudeBivash – Malware & Threat Intelligence Analyst
cyberdudebivash.com • cyberbivash.blogspot.com
#cyberdudebivash
Table of Contents
-
Executive Summary
-
Threat Background & Emergence
-
Latest Variant Features (XWorm v6.0 & Evolving Chains)
-
Technical Analysis
-
Attack Vectors & Infection Chains
-
Capabilities & Payloads
-
Indicators of Compromise (IoCs)
-
MITRE ATT&CK Mapping
-
CyberDudeBivash Defense Framework (CDB‑XWORM)
-
Strategic Recommendations
-
Affiliate Tooling
-
Conclusion & Executive Takeaways
-
CyberDudeBivash CTAs
-
High‑CPC Hashtags
1. Executive Summary
XWorm is a versatile, evolving RAT family — ranging from commodity to advanced-stage RAT. Recent variants (v6.0 and modular loaders) display robust anti-analysis techniques, AMSI bypass via CLR patching, critical process persistence, and shapeshifting delivery via multiple scripting formats. Immediate relevance due to widespread MaaS availability and use in advanced and low-skilled campaigns alike.
2. Threat Background & Emergence
-
Initially surfaced ~2022 as a Malware-as-a-Service (MaaS).
-
Active variants across tiers: RAT, ransomware, DDoS, cryptostealer.
-
APTs (TA558, NullBuldge, UAC-0184) and script kiddies both utilize XWorm.
cyber.nj.gov+4malpedia.caad.fkie.fraunhofer.de+4Point Wild+4trellix.comNetskope+2trellix.com+2cyber.nj.gov+3hunt.io+3Tinexta Defence+3cyber.nj.gov+3Cofense+3Point Wild+3
3. Latest Variant Features
XWorm v6.0 introduces:
-
AMSI bypass: In-memory patch of
CLR.DLL
’sAmsiScanBuffer
. -
Critical process persistence: Marking itself as critical so system crashes if killed.
-
Anti-analysis: Detects XP VM sandboxes and hosting IP ranges (AnyRun).
Netskope
Modular & evasive loaders:
-
Uses scripts (
.ps1
,.vbs
,.hta
), batch,.lnk
, ISO, VHD, macro, images — rotating formats dynamically.
Splunktrellix.com
4. Technical Analysis
-
Initial loaders: VBScript/VBScript embedding obfuscated code, then drop executable.
-
Use of AES-encrypted .NET modules in loaders (v4.0), with AES key inside binary.
todyl.com -
Shapeshifting loader scripts help evade static detections.
hunt.io
5. Attack Vectors & Infection Chains
-
Phishing campaigns with LNK, batch, macro, ISO, fake documents.
-
Paste.ee-based JS droppers with junk Unicode characters to obfuscate and reach C2 infrastructure.
KPMG+2Cofense+2hunt.io+2malpedia.caad.fkie.fraunhofer.de+2
6. Capabilities & Payloads
-
RAT with shell, DDoS, clipboard hijack, ransomware, keylogger modules, HVNC, file upload.
-
Supports steganographic loaders and modular plugin framework.
KPMG+3Cofense+3malpedia.caad.fkie.fraunhofer.de+3
7. Indicators of Compromise (IoCs)
-
JavaScript dropper hashes:
bd4952489685f6a76fe36fc220821515
-
XWorm sample SHA256:
6e976623d02e20d1b83e89fecd31215b
-
Paste.ee pattern URLs:
paste.ee/d/s1uVin8i/0
+ regexhttps:\/\/paste\.ee\/[a-z]\/…\/0$
-
C2 IPs:
45.145.43.244:6606
,66.63.187.154:6606
,66.63.187.232:8808
,196.251.118.41:8808
Cofense+11hunt.io+11Point Wild+11
8. MITRE ATT&CK Mapping
-
T1059.x – PowerShell / VBS execution
-
T1027 – Obfuscated Files
-
T1086 – PowerShell
-
T1053 – Scheduled tasks/registry persistence
-
T1055 – DLL injection/CLR patching for AMSI bypass
-
T1486 – Data exfiltration and DDoS functionality
-
T1499 – Service/process manipulation (critical flag)
9. CyberDudeBivash Defense Framework (CDB-XWORM)
-
Layered Delivery Detection: Enable detection for
.lnk
,.hta
,.vbs
, macros, ISO. -
AMSI Hardened & EDR with in-memory integrity.
-
Behavioral detection: monitor marking critical processes.
-
C2 network detection: alert on connections to known C2 ports (6606/8808) & domains like paste.ee.
-
Sandbox detection enhancements: detect IP-based sandbox evasion logic.
-
Threat hunting: Regex matching for paste.ee patterns + file hashes.
10. Strategic Recommendations
-
Deploy enterprise detection rules across PS, LNK, macro delivery.
-
Update AMSI bypass detection workflows.
-
Monitor for anomalous critical process behavior.
-
Harden endpoint telemetry and leverage threat intel-driven hunting.
11. Affiliate Tooling
-
[Heimdal Threat Prevention Suite] – advanced threat detection
-
[NordVPN Threat Protection] – secure outbound
-
[Surfshark One] – lightweight enterprise protection
-
[KnowBe4 Threat Training] – RAT/bait simulation
-
[ProtonMail Encrypted Email] – secure communications
12. Conclusion & Executive Takeaways
XWorm continues evolving—from commoditized RAT to highly evasive multi-format threat. The ability to bypass AMSI, become unkillable, and deploy across delivery chains makes it a serious enterprise risk. Proactive hunting, layered defense, and behavior-based detection are mission-critical.
13. CyberDudeBivash CTAs
-
Daily Intel: cyberbivash.blogspot.com
-
Tools Hub: cyberdudebivash.com/latest-tools-services-offered-by-cyberdudebivash/
-
Request CyberDudeBivash Malware Defense Playbook
-
Hire us for RAT/loader detection tuning & threat hunting
14.
#XWorm #RAT #MalwareAnalysis #AMSIBypass #RemoteAccessTrojan #CyberThreatIntelligence #CISO #EDR #CyberDefense #ThreatHunting #CyberSecurity2025 #CyberDudeBivash
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