407. That's How Paper Werewolf Obtains Credentials

Hello everyone!

Attackers are often able to extract authentication material from files, so today we'll take a look at the Credentials In Files (T1552.001) technique.

According to Kaspersky's report on the activity of the GOFFEE (Paper Werewolf) cluster, the threat actors showed a strong interest in various configuration files containing sensitive information, including:

cmd.exe /c type "%APPDATA%\AnyDesk\service.conf"

cmd.exe /c type "%USERPROFILE%\OpenVPN\config\avia\avia.ovpn"

cmd.exe /c type "%APPDATA%\Kerio\VpnClient\user.cfg"

cmd.exe /c dir "%USERPROFILE%\Downloads\Telegram Desktop"

Naturally, this kind of activity creates opportunities for proactive threat hunting. For example:

event_type: "processcreatewin"

AND

proc_file_path: "cmd.exe"

AND

cmdline: ("type" OR "dir")

AND

cmdline: ("anydesk" OR "openvpn" OR "vpnclient" OR "telegram desktop")

See you soon!

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