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Roman Sharkov admin Downloaded a virus for Linux lately and unpacked it. Tried to run it as root, didn’t work. Googled for 2 hours, found out that instead of uslocalbin the virus unpacked to usr bin for which the user malware doesn’t have any write permissions, therefore the virus couldn’t create a process file. Found patched . configure and . make files on some Chinese forum, recompiled and rerun it. The virus said it needs the library cmalw-11b-2.0. Turns out cmalw-lib-2.0 is shipped with CentOS but not with Ubuntu. Googled for hours again and found an instruction to build a . deb package from source. The virus finally started, wrote some logs, made a core dump and crashed. After 1 hour of going through the logs 1 discovered the virus assumed it was running on ext4 and called into its disk encryption API. Under btrfs this API is deprecated. The kernel noticed and made this partition read-only. Opened the sources, grep’ed the Bitcoin wallet and sent 5 out of pity. 19-50