2018-04-02 - QUICK POST: NECURS BOTNET MALSPAM PUSHES QUANTLOADER AND FOLLOW-UP MALWARE
- Zip archive of the malspam tracker: 2018-04-02-Necurs-Botnet-malspam-tracker-10-examples.csv.zip 1.1 kB (1,114 bytes)
- Zip archive of the infection traffic: 2018-04-02-two-pcaps-of-Necurs-Botnet-malspam-infection-traffic.zip 1.4 MB (1,434,234 bytes)
- Zip archive of the associated emails, malware, and artifacts: 2018-04-02-Necurs-Botnet-emails-malware-and-artifacts.zip 1.8 MB (1,780,424 bytes)
- Emails had the wrong encoding for the attachments (should've been base64 but was listed as: quoted-printable).
- I fixed that in the emails I collected for today's malware archive.
- Infection chain: 7z attachment --> extracted .url file --> .js file over SMB --> QuantLoader via HTTP --> follow-up malware via HTTP
- In my first run, the follow-up malware might be Evil Ammyy (Twitter thread).
- Later in the day during my second try, I saw GlobeImposter ransomware as the follow-up malware.
- I collected 80 .js files from the server at 188.8.131.52, and I've included them in today's malware archive.
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Shown above: Format error seen in emails from this wave of malspam.
Shown above: SMB traffic from the extracted .url file to retrieve a .js file (filtered in Wireshark).
Shown above: Saw 80 .js files from that server over SMB.
Shown above: Traffic from my second infection filtered in Wireshark (just the HTTP requests).
Shown above: GlobeImposter ransomware from my second infection attempt.
Shown above: GlobeImposter decryptor.
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