I investigated this duplicate https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/716865
Its FlexNet sector was sector 50.
I compared that sector50 with this sector32, the first 8 bytes are identical:
d8 41 a0 f5 02 00 02 00
So this is the signature of FlexNet.
If the command below finds the signature you are at risk:
sudo dd if=/dev/sda count=63 2>/dev/null | hd | grep "d8 41 a0 f5 02 00 02 00"
I investigated this duplicate https:/ /bugs.launchpad .net/ubuntu/ +source/ grub2/+ bug/716865
Its FlexNet sector was sector 50.
I compared that sector50 with this sector32, the first 8 bytes are identical:
d8 41 a0 f5 02 00 02 00
So this is the signature of FlexNet.
If the command below finds the signature you are at risk:
sudo dd if=/dev/sda count=63 2>/dev/null | hd | grep "d8 41 a0 f5 02 00 02 00"