user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Win32/Dusvext.B
Trojan:Win32/Dusvext.B - Windows Defender threat signature analysis

Trojan:Win32/Dusvext.B - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win32/Dusvext.B
Classification:
Type:Trojan
Platform:Win32
Family:Dusvext
Detection Type:Concrete
Known malware family with identified signatures
Variant:B
Specific signature variant within the malware family
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan - Appears legitimate but performs malicious actions for 32-bit Windows platform, family Dusvext

Summary:

Trojan:Win32/Dusvext.B is a concrete threat identified as a Trojan that likely establishes command-and-control (C2) communication via HTTP requests to scripts like 'adduser.php' and 'poster.php', potentially to exfiltrate data or receive further commands. The presence of the string 'getklogs' strongly suggests it has keylogging capabilities, aiming to steal sensitive user input.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - adduser.php?uid= (PEHSTR_EXT)
 - poster.php?uid= (PEHSTR_EXT)
YARA Rule:
rule Trojan_Win32_Dusvext_B_2147648491_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win32/Dusvext.B"
        threat_id = "2147648491"
        type = "Trojan"
        platform = "Win32: Windows 32-bit platform"
        family = "Dusvext"
        severity = "Critical"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "4"
        strings_accuracy = "High"
    strings:
        $x_1_1 = "]&country=" ascii //weight: 1
        $x_1_2 = "&cmpname=" ascii //weight: 1
        $x_1_3 = "adduser.php?uid=" ascii //weight: 1
        $x_1_4 = "poster.php?uid=" ascii //weight: 1
        $x_1_5 = "VertexNet" ascii //weight: 1
        $x_1_6 = "getklogs" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (4 of ($x*))
}
Known malware which is associated with this threat:
55e5642c9d816b5710303286881ed71532ffa9e4ad5a55966dc61a20fa1abaae
29/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected host from the network. Perform a full system scan with updated antivirus software and remove all detected malicious files. Investigate for persistence mechanisms (e.g., registry run keys, scheduled tasks) and remove them. Given the suspected keylogging functionality, reset all user credentials that may have been entered on the compromised system and monitor for any unauthorized activity.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 29/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
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