Masad Stealer Uses Telegram to Send Its Control Messages to Waiting Bots

Juniper Threat Labs has discovered a new Trojan-delivered spyware that uses Telegram to exfiltrate stolen information.

Juniper Threat Labs
has discovered
a new Trojan-delivered spyware that uses Telegram to exfiltrate stolen information. Using Telegram for a Command and Control (C&C) channel gives the malware some anonymity. Telegram is a legitimate messaging application that boasts of 200 million monthly active users.
Jupiter says the malware is being advertised on black market forums as Masad Clipper and Stealer. It starts with a free version and goes up to versions asking up to $85, with each tier of the malware offering different features.
Jupiter says that the malware steals browser data, which may then give up usernames, passwords and credit card information. Masad Stealer also automatically replaces cryptocurrency wallets from the clipboard with its own, so it does outright stealing as part of its nefarious activities.
The malware is made up of Autoit scripts and then it is compiled into a Windows executable. Jupiter saw most samples were about 1.5 MiB in size. But Masad Stealer can be found in larger executables since it has been bundled into other software.
Once started up, it drops itself in %APPDATA%folder_name}{file_name}, where folder_name and file_name have been defined in the binary. Examples might be names like amd64_usbhub3.inf.resources and ws2_32.exe, respectively. To gain persistence, Masad Stealer creates a scheduled task that will start itself every one minute.
It goes after certain information like cryptocurrency wallets, PC and system information, credit card browser data, browser passwords, desktop files, browser cookies, Steam files, AutoFill browser fields, Discord and Telegram data and FileZilla files.

It zips all of these into a file and then using a hardcoded bot token (a way to communicate with the Command and Control bot) it will send this zip file using the sendDocument API.
There is also a function that replaces wallets on the clipboard, as soon as it matches a particular configuration. The malware searches for wallets containing Monero, Bitcoin Cash, Litecoin, Neo, Web Money, ADA, ZCASH, DogeCoin, Stratis, QIWI Pay, Bicond, Waves, Reddcoin, Qtum, Payeer, Bytecoin, Bitcoin, Black Coin, VIA, Steam Trade Link, Bitcoin Gold, Emercoin, Lisk, Ethereum, Dash, Ripple and Yandex Money.
Based on Jupiters telemetry, Masad Stealers main distribution vectors will disguise it as a legitimate tool or may bundle it into third party tools. It has tried to pass itself off as ProxySwitcher, CCleaner, Utilman, Netsh and Whoami.
Since it has been distributed on forums, there are many variants of this malware in the wild. Each variant family may be assumed to control its own bot.
There is at least one dedicated website, (masadproject[.]life), in existence that promotes the sale of Masad Stealer. Ironically, the developers have also created a Telegram group for their potential clients which may even offer tech support. At time of writing, Juniper says that this group has more than 300 members.
— Larry Loeb has written for many of the last centurys major dead tree computer magazines, having been, among other things, a consulting editor for BYTE magazine and senior editor for the launch of WebWeek.

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Masad Stealer Uses Telegram to Send Its Control Messages to Waiting Bots