user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat VirTool:MSIL/CezAbuz
VirTool:MSIL/CezAbuz - Windows Defender threat signature analysis

VirTool:MSIL/CezAbuz - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: VirTool:MSIL/CezAbuz
Classification:
Type:VirTool
Platform:MSIL
Family:CezAbuz
Detection Type:Concrete
Known malware family with identified signatures
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Virus Tool - Tool used to create or modify malware for .NET (Microsoft Intermediate Language) platform, family CezAbuz

Summary:

VirTool:MSIL/CezAbuz is a concrete detection of a malicious tool utilizing the MSIL platform, designed for deep system compromise. It employs sophisticated techniques including API hooking, leveraging legitimate system binaries like `mshta`, `regsvr32`, `rundll32`, PowerShell, and BITS for execution and persistence, and is capable of network manipulation, remote file operations, and data encoding/deletion. This threat aims for sustained control and evasion.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.L!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.O!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRegsvr32.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRundll32.A!pli (PEHSTR_EXT)
 - rundll32 (PEHSTR_EXT)
 - !#HSTR:StringCodeForBITSJobs.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForPowerShell.G!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForScheduledTask.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForDataEncoding.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.J!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.K!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteFileCopy.B!pli (PEHSTR_EXT)
 - !#HSTR:ExecutionGuardrails (PEHSTR_EXT)
 - !#HSTR:StringCodeForFileDeletion.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.M!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForNetshHelperDLL.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteServices.A!pli (PEHSTR_EXT)
Known malware which is associated with this threat:
Filename: a1c86e70d6af382ab375eddc80baddd71fa85d890fb35f35ab3f38da532fd8ca.zip
a1c86e70d6af382ab375eddc80baddd71fa85d890fb35f35ab3f38da532fd8ca
30/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system to prevent lateral movement. Perform a full system scan with up-to-date antivirus software to quarantine and remove all detected malicious files. Thoroughly investigate for persistence mechanisms (e.g., scheduled tasks, registry modifications, startup entries) and review system logs for signs of further compromise, data exfiltration, or lateral movement. Ensure all systems are patched, enforce strong authentication, and enhance network monitoring.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 30/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊