rsk-cyber/Malware-Investigation-Analysis
GitHub: rsk-cyber/Malware-Investigation-Analysis
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# {{Malware Sample Name}} – Malware Analysis Report
**{{Brief description of the sample – e.g., "AsyncRAT trojan delivered via phishing email with fake invoice lure."}}**
## 📸 Screenshots
## 🔍 Static Analysis
### Strings (Interesting)
| String | Relevance |
|--------|-----------|
| `{{C2 domain or IP}}` | Potential command & control |
| `{{powershell -enc ...}}` | Encoded execution |
| `{{Registry key path}}` | Persistence mechanism |
| `{{Mutex name}}` | Anti‑sandbox / single instance |
### PE Headers (if applicable)
| Field | Value |
|-------|-------|
| Entry Point | `{{0x...}}` |
| Compile Timestamp | `{{YYYY-MM-DD}}` |
| Sections (Name, Virtual Size, Entropy) | `.text`, `.rdata`, `.data` |
| Imports | `{{kernel32.dll, user32.dll, etc.}}` |
### VirusTotal / MalwareBazaar Results
| Vendor | Detection Name |
|--------|----------------|
| {{e.g., CrowdStrike}} | {{trojan.msil/scarsi}} |
| {{...}} | {{...}} |
## 🧪 Dynamic Analysis (Sandbox Detonation)
**Sandbox used:** {{Joe Sandbox / Cuckoo / ANY.RUN / CAPE}}
**Report link:** {{URL}}
- **Processes created:**
`{{D41tYapPDr.exe}}` → `{{powershell.exe -enc ...}}` → `{{conhost.exe}}`
- **Process injection:**
{{Code injected into suspended process / hollowing detected}}
- **File system changes:**
Dropped `{{%AppData%\Roaming\Vlevqbxvsx\Kjcrsvxp.exe}}`
- **Registry changes:**
Created `{{HKCU\Software\Microsoft\Windows\CurrentVersion\Run\Kjcrsvxp}}`
- **Network activity:**
HTTP GET to `{{http://107.175.247.199/loader/install.exe}}`
C2 beacon to `{{107.175.247.199:443}}`
- **Persistence mechanism:**
{{Registry run key / scheduled task / startup folder}}
- **Anti-analysis techniques detected:**
{{Check for sandbox, debugger, VM, sleep obfuscation}}
## 🧠 Indicators of Compromise (IOCs)
| Type | Indicator |
|------|-----------|
| **MD5** | `{{34793C6520DCF3C6130DC031FA640C71}}` |
| **SHA-1** | `{{...}}` |
| **SHA-256** | `{{...}}` |
| **IPv4** | `{{107.175.247.199}}` |
| **Domain** | `{{malicious[.]top}}` |
| **URL** | `{{http://107.175.247.199/loader/install.exe}}` |
| **Registry Key** | `{{HKCU\...\Run\Kjcrsvxp}}` |
| **File Path** | `{{%AppData%\Roaming\Vlevqbxvsx\Kjcrsvxp.exe}}` |
| **Mutex** | `{{Global\...}}` |
## 🎯 MITRE ATT&CK Mapping
| Tactic | Technique ID | Technique Name | Observed Behavior |
|--------|--------------|----------------|--------------------|
| Execution | T1059.001 | Command and Scripting Interpreter: PowerShell | `powershell -enc` executed |
| Persistence | T1547.001 | Registry Run Keys / Startup Folder | Run key created |
| Defense Evasion | T1027 | Obfuscated Files or Information | Base64 encoded PowerShell |
| Defense Evasion | T1055 | Process Injection | Injected into suspended process |
| Discovery | T1082 | System Information Discovery | Queries computer name, OS version |
| Command & Control | T1071.001 | Application Layer Protocol: Web Protocols | HTTP beacon to C2 |
| Exfiltration | T1041 | Exfiltration Over C2 Channel | Data sent via C2 |
## 🛡️ Mitigation Recommendations
- [ ] **Block IOCs** – Add all hashes to endpoint AV/EDR, block C2 IP/domain at firewall, quarantine dropped files.
- [ ] **Scope the environment** – Search entire network for IOCs: file hash, registry key, process names, network connections to `{{107.175.247.199}}`.
- [ ] **Remove persistence** – Delete registry run key `{{HKCU\...\Run\Kjcrsvxp}}` and kill any related processes.
- [ ] **Email gateway** – Block sender infrastructure and any emails containing the malicious URL.
- [ ] **User awareness** – Train users to recognize phishing lures (e.g., fake invoices) even when sender appears legitimate.
- [ ] **EDR hunting** – Query for `-enc` flag in PowerShell command lines and processes creating suspended child processes.
## 📈 Lessons Learned & Reflection
- **What worked well:**
{{Sandbox quickly identified injection and persistence; VirusTotal gave high detection rate.}}
- **What could be improved:**
{{Automate decoding of PowerShell -enc strings; integrate C2 IP blocking into SOAR.}}
- **Key takeaway for SOC:**
{{Even simple-looking executables can be sophisticated RATs. Always sandbox and check registry changes.}}
## 🔗 References & Tools Used
- **Sandbox:** {{Joe Sandbox / ANY.RUN / CAPE}}
- **VirusTotal:** {{link}}
- **Malpedia / Triage:** {{link}}
- **CyberChef:** {{link}}
- **PEStudio / Detect It Easy:** {{link}}
- **ProcMon / Wireshark:** {{link}}
*Template last updated: {{YYYY-MM-DD}}*