Reversing malware in a custom format: Hidden Bee elements

Threat analysis | Malware

Fileless malware: getting the lowdown on this insidious threat

August 29, 2018 - In this series of articles, we provide an in-depth discussion of fileless malware and their related attacks. In part one, we cover a brief overview of the problems with and general features of fileless malware, laying the groundwork for technical analysis of various samples employing fileless and semi-fileless methods.

Threat analysis | Malware

Process Doppelgänging meets Process Hollowing in Osiris dropper

August 13, 2018 - Process doppleganging, a rare technique of impersonating a process, was discovered last year, but hasn't been seen much in the wild since. It was an interesting surprise, then, to discover its use mixed in with Process Hollowing, yet another technique, in a dropper for the Osiris banking Trojan.

Threat analysis | Malware

SamSam ransomware: controlled distribution for an elusive malware

June 19, 2018 - SamSam ransomware is a unique malware for its explicit human interaction on selected targets and care to erase most of its tracks.

Threat analysis | Malware

Malware analysis: decoding Emotet, part 2

June 7, 2018 - In part two of our series on decoding Emotet, we analyze the PowerShell code flow and structure. We also reconstruct the command-line arguments—for fun!

Threat analysis | Malware

Malware analysis: decoding Emotet, part 1

May 25, 2018 - In the first part of this two-part analysis of Emotet, we look at the VBA code, where you'll learn how to recognize and discard "dead" code thrown in to complicate the analysis process.

Threat analysis | Malware

Kuik: a simple yet annoying piece of adware

May 8, 2018 - Kuik adware, which forces affected machines to join a domain controller, is using this unusual technique to push Google Chrome extensions and coin miner applications. In this blog, we'll provide technical analysis of the adware and custom removal instructions.

Threat analysis | Malware

Spartacus ransomware: introduction to a strain of unsophisticated malware

April 30, 2018 - Spartacus ransomware is a fairly new variant seen in 2018. We'll walk you through the malware sample to analyze the code in detail, and help you learn how to get an obfuscated .NET sample into a readable state.

Threat analysis | Malware

PBot: a Python-based adware

April 18, 2018 - Recently, we came across a Python-based sample dropped by an exploit kit. Although it arrives under the disguise of a MinerBlocker, it has nothing in common with miners. In fact, it seems to be PBot: a Python-based adware.

Threat analysis | Malware

Encryption 101: decryption tool code walkthrough

April 12, 2018 - In our final installment of the Encryption 101 series, we walk you through the source code of the Princess Locker decryption tool.

Threat analysis | Malware

LockCrypt ransomware: weakness in code can lead to recovery

April 4, 2018 - A lesser-known variant called LockCrypt ransomware has been creeping around under the radar since June 2017. We take a look inside its code and expose its flaws.