Malware descriptions

New Gpcode – mostly hot air

The latest Gpcode variant, which we wrote about here, is much less of a threat than its predecessors. The claims made by the author about the use of AES-256 and the enormous number of unique keys were a bluff. The author even didn’t use a public key in encryption, so all the information needed to decrypt files is right there in the body of the malicious program.

Our analysis shows that the Trojan uses the 3DES algorithm but the author dug up an off-the-peg Delphi component rather than going to the trouble of creating his own encryption routine. The Trojan’s code is pretty messy throughout – and very different in style to previous versions of Gpcode – which indicates that the author isn’t much of a programmer.

We’ve called this new variant Trojan-Ransom.Win32.Gpcode.am. Our antivirus updates include procedures for restoring encrypted files – so if you’ve fallen victim to Gpcode.am, just update your av databases and run a full scan of your machine. And because Gpcode was spread by another malicious program, P2P-Worm.Win32.Socks.fe, don’t be surprised if your antivirus brings some other nasties to light.

New Gpcode – mostly hot air

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Reports

APT trends report Q2 2021

This is our latest summary of advanced persistent threat (APT) activity, focusing on significant events that we observed during Q2 2021: attacks against Microsoft Exchange servers, APT29 and APT31 activities, targeting campaigns, etc.

LuminousMoth APT: Sweeping attacks for the chosen few

We recently came across unusual APT activity that was detected in high volumes, albeit most likely aimed at a few targets of interest. Further analysis revealed that the actor, which we dubbed LuminousMoth, shows an affinity to the HoneyMyte group, otherwise known as Mustang Panda.

WildPressure targets the macOS platform

We found new malware samples used in WildPressure campaigns: newer version of the C++ Milum Trojan, a corresponding VBScript variant with the same version number, and a Python script working on both Windows and macOS.

Ferocious Kitten: 6 years of covert surveillance in Iran

Ferocious Kitten is an APT group that has been targeting Persian-speaking individuals in Iran. Some of the TTPs used by this threat actor are reminiscent of other groups, such as Domestic Kitten and Rampant Kitten. In this report we aim to provide more details on these findings.

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