malware-analysis-fake-hwmonitor — Technische Analyse, Writeup und YARA-Regeln für eine als HWMonitor getarnte DLL-Sideloading-Kampagne | Kitploit

BLAKCSEE_STEALER

flowchart TD
    subgraph Stage1["1. Initial Access & Sideloading"]
        Victim(["User executes downloaded file"]) --> Carrier["hwmonitor-...-6.77.7.exe<br/>(Legitimate Notepad++ GUP.exe)"]
        Carrier -->|Auto-loads via Search Order| Loader["libcurl.dll<br/>(Malicious C++ Hook Loader)"]
    end

    subgraph Stage2["2. Evasion & Memory Hijacking"]
        Loader --> CheckEnv{"Environment Check<br/>fcn.180005700"}
        CheckEnv -->|Sandbox detected / Network isolated| ExitClean["Clean exit (Timeout 10s)"]
        CheckEnv -->|Target host confirmed| StackXOR["Stack-String XOR Resolution<br/>('ReadFile' via 0x180005cf0)"]
        StackXOR --> IATHook["Patch Host IAT table<br/>(ntdll.dll via fcn.180009ac0)"]
    end

    subgraph Stage3["3. Payload Delivery & Ballast"]
        IATHook --> ReadBox["Read & decrypt in memory"]
        ReadBox --> SafeBox["ProfilerTools.dll (93.8 MB)<br/>Ciphertext Container (Entropy 8.0)"]
        SafeBox --> StealerRAM["Decrypted Infostealer in RAM<br/>(RedLine / Lumma / Vidar)"]
        Carrier -.->|Ignored by loader| Ballast["ui_framework.dll (16.5 MB)<br/>Clean Microsoft WCF Ballast"]
        Carrier -.->|Ignored by loader| Decoy["config.txt (Decoy GitHub links)"]
    end

File	Description
`malware_analysis_report_en.txt`	Umfassender 9-stufiger technischer Reverse-Engineering-Bericht (Englisch).
`malware_analysis_report.txt`	Полный подробный отчет о реверс-инжиниринге и методологии (Русский).
`rules_hwmonitor_sideload_en.yar`	Produktionsreifes YARA-Regelset mit englischen Beschreibungen und Metadaten.
`rules_hwmonitor_sideload.yar`	Комплект сигнатур YARA с русскими комментариями.

SHA-256: 22a6cea4d2069935a7c621b9a96ba82d46a2d058dffca4d11917721c63ae341a
Imports: Restriktive Import-Tabelle (nur kernel32.dll).

Stack Strings: Dynamische Laufzeitberechnung von ReadFile:

(0x23 + 0x07) ^ 0x78 = 'R' (0x52)
(0x23 + 0x26) ^ 0x2c = 'e' (0x65)
(0x23 + 0x45) ^ 0x09 = 'a' (0x61)
(0x23 + 0x64) ^ 0xe3 = 'd' (0x64)
(0x23 - 0x7d) ^ 0xe0 = 'F' (0x46)
(0x23 - 0x5e) ^ 0xac = 'i' (0x69)
(0x23 - 0x3f) ^ 0x88 = 'l' (0x6c)
(0x23 - 0x20) ^ 0x66 = 'e' (0x65)

Tactic	Technique ID	Technique Name
Defense Evasion	`T1574.002`	Hijack Execution Flow: DLL Side-Loading
Defense Evasion	`T1027.001`	Binary Padding (Binary Inflation / File Pumping)
Defense Evasion	`T1027`	Obfuscated Files or Information (Stack Strings XOR)
Defense Evasion	`T1497`	Virtualization/Sandbox Evasion (GetSystemInfo checks)
Persistence / Execution	`T1055`	Process Injection: IAT Hooking
Command and Control	`T1568.002`	Dynamic Resolution: Domain Generation Algorithms (DGA)

# SHA-256 Hashes
64e602e1c744da32c53b5761fa7b15dba72023df0176cc03a48c0c0bb52f2c37  Desktop.7z (Parent Delivery Archive / Tria.ge Sample)
b9c965aa538c21b4702ec7e4f3ac47fc999e1cd505d69e0896a309f7956bb351  hwmonitor-windows-github-io-6.77.7.exe (GUP.exe)
22a6cea4d2069935a7c621b9a96ba82d46a2d058dffca4d11917721c63ae341a  libcurl.dll (Malicious Loader)
242e5a415c7efb1f86b408e238d24835c72836f1e8e2439b0a6713e0b1f8d638  ProfilerTools.dll (Encrypted Container)

# MD5 Hashes
7744ed6fac4775706938298f9cb5ba0d  hwmonitor-windows-github-io-6.77.7.exe
866da3588ceacbb854f95f6d581ca464  libcurl.dll
133710d5b04ef72c22c48b43d0ad39af  ProfilerTools.dll

# Magic Header (Offset 0x0)
5B 28 B3 C0 5A 13 73 1F 1A B0 0A A9 53 3C 16 72  ProfilerTools.dll

Beliebteste

malware-analysis-fake-hwmonitor

🧩 Angriffskette & Ausführungsablauf (Цепочка атаки)

📂 Repository-Inhalt / Файлы в репозитории

🔬 Komponentenaufschlüsselung

1. `hwmonitor-windows-github-io-6.77.7.exe` (Carrier)

2. `libcurl.dll` (Loader & IAT Hooker)

3. `ProfilerTools.dll` (Verschlüsselter Payload-Container)

4. `ui_framework.dll` (Inflations-Ballast)

🎯 MITRE ATT&CK-Zuordnung

🛡️ Indicators of Compromise (IoC)

🔍 Verwendung der YARA-Regel

📚 Referenzen & Recherche-Tools

Beliebteste

malware-analysis-fake-hwmonitor

Bedrohungsanalyse: Gefälschte HWMonitor-DLL-Sideloading- & Infostealer-Kampagne

📌 Executive Summary / Краткая сводка