Re: Spam with broken URI (Zero-Width-Space Unicode characters)

2025-03-08 Thread Michel Arboi
> Just to verify: do email headers *properly* define that this part of email is > "text/html" MIME type, and that it uses quoted-printable encoding? Yes: _NmP-f79e46939889b5eb-Part_1 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable (I attached the gzipped

Re: Spam with broken URI (Zero-Width-Space Unicode characters)

2025-03-07 Thread Michel Arboi
This piece of HTML triggers my rules, it shouldn't: Mobile: 01250 873989 https://www.jbcorrie.co.uk";>https://jbcorrie.co.uk/wp-content/uploads/2022/11/JB-Corrie-and-Co-Ltd-= Signal-Box-Road-Blaigowrie-Perthshire-PH10-6ER-01250-873989.jpg" width=3D"7= Mar 7 02:37:14.474 [162580] dbg: uri: r

French spam passed all SA tests with flying colors

2025-03-06 Thread Michel Arboi
I guess I'll have to blacklist some URI domains, but if anybody finds a btter idea, I'll take it. Note the GDPR pseudo legal text. This is utter BS of course, as this was not sent to a professional address. Ce message vous a été envoyé par DATAVENTURE GROUP dans le cadre de nos activités de prosp

Re: Spam body template with diacritics and variants

2025-03-05 Thread Michel Arboi
On Wed, 5 Mar 2025 15:18:43 +0100 Tom Hendrikx wrote: > Interesting to see all the variants and diacritics used. Maybe we can > improve some rules based on the variants. I never received anything > like this, so sharing for the people interested. I received some spams like this, a couple of yea

Re: [External] [ZeroDay] Spam with broken URI (Zero-Width-Space Unicode characters)

2025-02-22 Thread Michel Arboi
On Sat, 22 Feb 2025 12:31:37 -0500 "Kevin A. McGrail" wrote: > You might want to look at the KAM ruleset Interesting. KAM_REPLACE and KAM_OBFURL I suppose? > and look at the ZW rules as well. -KAM Where is it? I found a couple of blog articles on zero width characters used for obfuscation, b

Spam with broken URI (Zero-Width-Space Unicode characters)

2025-02-21 Thread Michel Arboi
I received this phishing spam yesterday. That was not the first of this kind. (attached, w/o the image) I thought about this and wrote this uri-bad-unicode.cf Insert it in your local.cf or in /etc/spammassin, adjust the scores and restart spamd. Comments welcome. I am pretty sure there are more