user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Backdoor:Linux/Mirai!MSR
Backdoor:Linux/Mirai!MSR - Windows Defender threat signature analysis

Backdoor:Linux/Mirai!MSR - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Mirai!MSR
Classification:
Type:Backdoor
Platform:Linux
Family:Mirai
Detection Type:Concrete
Known malware family with identified signatures
Suffix:!MSR
High-priority threat flagged by Microsoft Security Response
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Backdoor - Provides unauthorized remote access for Linux platform, family Mirai

Summary:

This is a concrete detection of a Mirai variant backdoor targeting Linux systems, designed to turn compromised devices into bots for malicious activities like DDoS attacks. It leverages capabilities for remote command execution, SQL injection (likely for propagation), and communicates with command-and-control servers to download payloads and receive instructions.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - /ver.txt (PEHSTR_EXT)
 - /update.txt (PEHSTR_EXT)
 - http://%s:8888/ (PEHSTR_EXT)
 - \msinfo.exe (PEHSTR_EXT)
 - /delete /f /tn msinfo (PEHSTR_EXT)
 - //%s:8888/ups.rar (PEHSTR_EXT)
 - //%s:8888/wpd.dat (PEHSTR_EXT)
 - //%s:8888/wpdmd5.txt (PEHSTR_EXT)
 - //down2.b5w91.com:8443 (PEHSTR_EXT)
 - /shell?%s (PEHSTR_EXT)
 - ;exec sp_add_jobserver (PEHSTR_EXT)
 - ;EXEC sp_droplogin (PEHSTR_EXT)
 - ;exec(@a); (PEHSTR_EXT)
 - <sip:carol@chicago.com> (PEHSTR_EXT)
 - @name='bat.exe',@freq_type=4,@active_start_date (PEHSTR_EXT)
 - @shell INT EXEC SP_ (PEHSTR_EXT)
 - [Cracker:MSSQL] Host:%s, blindExec CMD: %s (PEHSTR_EXT)
 - [ExecCode] (PEHSTR_EXT)
 - [ExecCode]AUTHORIZATION [dbo] FROM 0x4D5A (PEHSTR_EXT)
 - \Run','rundll32'; (PEHSTR_EXT)
 - C:\Progra~1\kugou2010&attrib (PEHSTR_EXT)
 - C:\Progra~1\mainsoft&attrib (PEHSTR_EXT)
 - C:\Progra~1\shengda&attrib (PEHSTR_EXT)
 - cmd3:[%s] (PEHSTR_EXT)
 - DROP ASSEMBLY ExecCode (PEHSTR_EXT)
 - !#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: aUl
2e2ffa75be4eba86e3330e541608b8bbf7ea4726daadee152661207777c0d8aa
18/06/2026
→VirusTotal↓Download Sample
Filename: data_x86
a968f19da3dae7d43acdd45bd54858633155e81eae6e0e76c2ab56c55f8ccb7f
18/06/2026
→VirusTotal↓Download Sample
Filename: data_x86_64
f8551f683ac49cda1666e623964a37ff3ea18f723ce452a55096029086ccdaa0
18/06/2026
→VirusTotal↓Download Sample
Filename: x86
352698d6103fcbc04f406c30d1c6dc5fef12c57232299d472aba17f59dff2438
04/06/2026
→VirusTotal↓Download Sample
Filename: i486
9a836af038f270dc26adad7a0ec58293c079cfdd9212db550cca495148aa6580
30/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected Linux device from the network. Perform a factory reset or reimage the device's operating system to ensure complete removal. Change all default and weak credentials. Patch all known vulnerabilities, especially for exposed services, and implement strong network segmentation and firewall rules to restrict external access to IoT devices.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 30/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
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