# Extract strings, limit to printable ASCII > 4 chars strings -a -n 5 unknown_file > strings.txt
## 4. Static Analysis - **File type:** `PE32 executable (GUI) Intel 80386, for MS Windows` (identified by `file` command) - **Strings highlights:** - `http://185.53.179.12/loader.exe` - `C:\Windows\Temp\svchost.exe` - `RegOpenKeyExA` `CreateProcessA` - **PE imports:** `urlmon.dll`, `wininet.dll`, `kernel32.dll`, `advapi32.dll` - **Embedded resources:** One compressed PE (`UPX0`) – suggests UPX packing. https- new1.gdtot.sbs file 1404814641
## 6. OSINT Correlation - **Domain `gdtot.sbs`** appears in 42 recent VT submissions, 35 of which are classified as **Malware** (mostly ransomware droppers). - **IP `185.53.179.12`** listed on AbuseIPDB with 1,218 reports for “malware distribution”. - **File ID `1404814641`** referenced on a 4chan thread discussing “new .exe drops from GDTOT”. # Extract strings, limit to printable ASCII >
# Identify file type file unknown_file
## 2. Metadata | Property | Value | |----------|-------| | Domain reputation | Blacklisted on URLhaus (malware distribution) | | SSL cert issuer | Let’s Encrypt (valid until 2026‑07‑01) | | File ID timestamp | 2014‑09‑23 09:47:21 UTC (possible upload date) | OSINT Correlation - **Domain `gdtot
The aim is to assess the file’s provenance, safety, and content actually distributing or reproducing the file itself. 1. Collect the basics (metadata you can gather without downloading) | Item | How to obtain | Why it matters | |------|----------------|----------------| | Full URL | Copy the exact link (including protocol, sub‑domain, path, and any query string). | Shows the hosting service ( gdtot.sbs ) – a domain that frequently appears in file‑sharing / “link‑generator” ecosystems. | | Domain reputation | Use tools like VirusTotal Domain Report , URLhaus , or Talos Intelligence to see if the domain has been flagged for phishing, malware distribution, or other abuse. | Helps you decide whether the site is broadly considered malicious. | | Timestamp | Look at the HTTP Date header (if you do a HEAD request) or at the “last‑modified” field if present. | Gives a rough idea of how fresh the file is; older files are more likely to have been re‑used in campaigns. | | File identifier | The numeric string 1404814641 may be an internal ID or a timestamp (Unix epoch = 2014‑09‑23 09:47:21 UTC). | If it’s a timestamp, it can hint at when the file was first uploaded. | | SSL certificate | Click the lock icon in the browser or run openssl s_client -connect new1.gdtot.sbs:443 -servername new1.gdtot.sbs . | Confirms the site uses a valid TLS cert (often a free Let’s Encrypt cert) – not a guarantee of safety but helps rule out obvious MITM setups. | Tip: Keep a simple spreadsheet (or a markdown table) of these observations for each file you examine. It makes pattern‑recognition much easier later on. 2. Obtain a hash without executing the file If you can download the file safely (see § 3 for sandbox options), compute its cryptographic digests: