user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat DDoS:Win32/Nitol
DDoS:Win32/Nitol - Windows Defender threat signature analysis

DDoS:Win32/Nitol - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: DDoS:Win32/Nitol
Classification:
Type:DDoS
Platform:Win32
Family:Nitol
Detection Type:Concrete
Known malware family with identified signatures
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: DDoS for 32-bit Windows platform, family Nitol

Summary:

DDoS:Win32/Nitol is a concrete detection for a botnet variant actively engaged in Distributed Denial of Service (DDoS) attacks. It employs HTTP-based attack methods, communicates with specified command-and-control (C2) servers, and establishes persistence on the compromised system through modifications to service-related registry keys.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - ) Gecko/20080808 Firefox/%d.0 (PEHSTR_EXT)
 - .htmGET ^&&%$%$^%$#^&**( (PEHSTR_EXT)
 - SOFTWARE\Microsoft\Windows NT\CurrentVersion\Svchost (PEHSTR_EXT)
 - Gecko/20080808 Firefox/%d.0 (PEHSTR_EXT)
 - ; MSIE %d.00; Windows NT %d.0; MyIE 3.01) (PEHSTR_EXT)
 - %c%c%c%c%c.exe (PEHSTR_EXT)
 - \\.\Passthru (PEHSTR_EXT)
 - Referer: http://%s:80/http://%s (PEHSTR_EXT)
 - 192.168.1.244 (PEHSTR_EXT)
 - .htmGET ^&&%$%$^%$#^&**(*((&*^%$##$%^&*(*&^%$%^&*.htmGET ^ (PEHSTR_EXT)
 - Yow! Bad host lookup. (PEHSTR_EXT)
 - %d.%d.%d.%d (PEHSTR_EXT)
 - ddos.hackxk.com (PEHSTR_EXT)
 - 33921035.f3322.org (PEHSTR_EXT)
 - %c%c%c%c%c%c.exe (PEHSTR_EXT)
 - /c @ping -n 5 127.0.0.1&del (PEHSTR_EXT)
 - SYSTEM\CurrentControlSet\Services\ (PEHSTR_EXT)
 - Description (PEHSTR_EXT)
 - SYSTEM\CurrentCont (PEHSTR_EXT)
 - rolSet\Services\ (PEHSTR_EXT)
 - ^&*.htmGET ^&&%$ (PEHSTR_EXT)
 - Referer: http://%s (PEHSTR_EXT)
 - GET %s HTTP/1.1 (PEHSTR_EXT)
 - %sias.ini (PEHSTR)
 - %swuapi.ini (PEHSTR)
 - Software\Microsoft\Windows\CurrentVersion\Run (PEHSTR_EXT)
 - ddos.tf (PEHSTR_EXT)
 - hra%u.dll (PEHSTR_EXT)
 - \%c%c%c%c%c.exe (PEHSTR_EXT)
 - HARDWARE\DESCRIPTION\System\CentralProcessor\0 (PEHSTR_EXT)
 - Referer: http://%s%s (PEHSTR_EXT)
 - Documents\update.lnk (PEHSTR_EXT)
 - Bensons.pdb (PEHSTR_EXT)
 - .dll (PEHSTR_EXT)
 - C:\Users\16512\Desktop\yk (PEHSTR_EXT)
 - C:\ProgramData\jy.lnk (PEHSTR_EXT)
 - F:\hackshen.exe (PEHSTR_EXT)
 - :9874/AnyDesk.exe (PEHSTR_EXT)
 - WindowsProject8.pdb (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)
YARA Rule:
rule DDoS_Win32_Nitol_A_2147644209_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "DDoS:Win32/Nitol.A"
        threat_id = "2147644209"
        type = "DDoS"
        platform = "Win32: Windows 32-bit platform"
        family = "Nitol"
        severity = "Critical"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "3"
        strings_accuracy = "High"
    strings:
        $x_1_1 = ") Gecko/20080808 Firefox/%d.0" ascii //weight: 1
        $x_1_2 = ".htmGET ^&&%$%$^%$#^&**(" ascii //weight: 1
        $x_1_3 = {00 4e 61 74 69 6f 6e 61 6c}  //weight: 1, accuracy: High
        $x_1_4 = {ff d5 68 00 e9 a4 35 66 89}  //weight: 1, accuracy: High
        $x_1_5 = {6e 65 78 25 64 00 00 00 6e 65 74 73 76 63 73 00 53 4f 46 54 57 41 52 45 5c 4d 69 63 72 6f 73 6f 66 74 5c 57 69 6e 64 6f 77 73 20 4e 54 5c 43 75 72 72 65 6e 74 56 65 72 73 69 6f 6e 5c 53 76 63 68 6f 73 74}  //weight: 1, accuracy: High
    condition:
        (filesize < 20MB) and
        (3 of ($x*))
}
Known malware which is associated with this threat:
Filename: ebd9a4e12b3185a36aa3942fcde077a70a730694f9961e20eef21dd19f6d4d1b.dll
ebd9a4e12b3185a36aa3942fcde077a70a730694f9961e20eef21dd19f6d4d1b
31/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected host from the network. Conduct a full system scan with updated antivirus software to remove all detected malware components. Manually review and remove any persistence mechanisms in registry entries (e.g., `SOFTWARE\Microsoft\Windows NT\CurrentVersion\Svchost`, `SYSTEM\CurrentControlSet\Services\`). Block known C2 domains such as `ddos.hackxk.com` and `33921035.f3322.org` at the network perimeter, and ensure all operating systems and applications are fully patched.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 30/01/2026. Do you want to analyze it again?
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