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Symbian malware uses a 91-byte XOR key

08

Nov

2011

It’s high time the Crypto Girl talks about Crypto, isn’t it? A few days ago, I analyzed a malicious Opera Updater, named SymbOS/OpFake.A!tr.dial, and was surprised to discover it uses a 91-byte XOR key to conceal one of its configuration file. 91 bytes?! Yes, bytes, so 728 bits. This is quite a lot. AES only […]

Category Security Written by Fortinet Security Blog 0 Comments

Following the tracks: understanding snowshoe spam

07

Oct

2011

Brett Cove from SophosLabs in Vancouver presented his talk, “Following the tracks: understanding snowshoe spam”, at the Virus Bulletin 2011 conference in Barcelona this morning. While there has been a lot of press about botnets being shutdown resulting in lower volumes of spam reaching our gateways, there has been very little discussion about tackling “snowshoe” […]

Category General Written by Naked Security - Sophos 0 Comments

Zitmo hits Android

08

Jul

2011

Zitmo has been used by the ZeuS gang to defeat SMS-based banking two-factor authentication on Symbian, BlackBerry and Windows Mobile for a several months (see my ShmooCon slides). Lately, there’s been an active discussion on technical forums regarding ZeuS targetting Android users. We finally managed to get our hands on the mobile sample the ZeuS […]

Category Security Written by Fortinet Security Blog 0 Comments

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Symbian malware uses a 91-byte XOR key

Following the tracks: understanding snowshoe spam

Zitmo hits Android

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