[One (M8) General] Isotopes:
For now i think this is an combined zip file (full file name like this 0P6BIMG_M8_UL_M60_SENSE70_MR_HTC_Europe_6.12.401.4_R_Radio_1.29.214500021.12G_20.72.4196t.01_F_release_465903_combined_signed_2_4.zip)

the file have a large@zip header and it have 6 zip files in there ... date is from 17.12.2015

here the info from android-info.txt:

modelid: 0P6B10000
cidnum: HTC__001
cidnum: HTC__J15
cidnum: HTC__E11
cidnum: HTC__203
cidnum: HTC__102
cidnum: HTC__405
cidnum: HTC__A07
cidnum: HTC__304
cidnum: HTC__032
cidnum: HTC__016
cidnum: HTC__M27
cidnum: HTC__K18
cidnum: HTC__002
cidnum: HTC__A48
cidnum: HTC__Y13
mainver: 6.12.401.4
btype:1
aareport:1
DelCache:1
DelFrp:1
DelCarrier:1
hbootpreupdate:3

Edit_1: Radio Version -> 1.29.214500021.12G_20.72.4196t.01 from Nov 12 2015 22:13:15

Edit_2: content from build.prop:

ro.customer.HTC__J15=PROJECT_G0005_flag, 0x0034
ro.language.HTC__J15=LANGUAGE_ARA_flag, 0x0019
ro.customer.HTC__K18=PROJECT_G0005_flag, 0x0034
ro.language.HTC__K18=LANGUAGE_ISR_flag, 0x0038
ro.ril.enable.a52=0
ro.ril.enable.a53=1
ro.ril.enable.dtm=0
ro.ril.hsdpa.category=24
ro.ril.hsupa.category=6
ro.ril.hsxpa=4
ro.ril.fast.dormancy.rule=1
ro.ril.disable.fd.plmn.prefix=23402,23410,23411,23420,23594,27202,27205
ro.ril.enable.managed.roaming=1
ro.ril.enable.sdr=1
ro.ril.n-roaming.mcclist=219,204,234,272,222,240,232,238,260,425
ro.ril.show.all.plmn=1
ro.ril.enable.amr.wideband=1
ro.ril.enable.r8fd=1
ro.ril.disable.cpc=1
ro.product.locale.language=en
ro.product.locale.region=US
ro.product.locale=en-US
ro.com.google.clientidbase=android-htc-rev
ro.telephony.default_network=0
ro.ril.vmail.23415=1571,BT,121,VDF UK
ro.ril.vmail.27203=171
ro.ril.vmail.65502=181
ro.ril.vmail.27211=171
ro.ril.vmail.65510=100
ro.ril.vmail.22299=4133,3ITA
ro.ril.vmail.23410=901,O2 UK,905,TESCO,443,giffgaff
ro.ril.vmail.22201=41901,I TIM
ro.ril.vmail.22210=42020,Vodafone IT
ro.ril.vmail.22288=4200,I WIND
ro.ril.vmail.20801=888
ro.ril.vmail.20810=123
ro.ril.vmail.20826=777
ro.ril.vmail.42403=161
ro.product.model=HTC One_M8
ro.config.htc.enableCOTA=1
ro.telephony.ipv6_capability=1
ro.ril.enable.pre_r8fd=1
ro.ril.fd.pre_r8_tout.scr_off=2
ro.ril.fd.pre_r8_tout.scr_on=3
ro.ril.fd.r8_tout.scr_off=2
ro.ril.fd.r8_tout.scr_on=3
ro.ril.ltefgi=1578105984
ro.ril.ltefgi.rel9=2147483648
ro.ril.lte3gpp=35
ro.customer.default=PROJECT_G0005_flag, 0x0034
ro.language.default=LANGUAGE_WWE_flag, 0x0000
ro.ril.enable.enhance.search=1
ro.ril.gsm.amrwb=1
dev.defaultwallpaper=/system/customize/resource/wallpapers_00.jpg
ro.telephony.bl=27202
ro.apn.uservalue.protocol=IPV4V6
ro.cw.base.version=M60
# begin build properties
# autogenerated by buildinfo.sh
htc.build.stage=2
ro.aa.customizationid=1126034
ro.aa.project=M8_UL_M60_SENSE70_MR
ro.aa.maincid=HTC__001
ro.aa.modelid=0P6B10000
ro.aa.cidlist=HTC__001,HTC__J15,HTC__E11,HTC__203,HTC__102,HTC__405,HTC__A07,HTC__304,HTC__032,HTC__016,HTC__M27,HTC__K18,HTC__002,HTC__A48,HTC__Y13
ro.aa.rid=356
ro.cwkey=CWS__001
ro.aa.report=com
ro.aa.skulist=401
ro.aa.taskid=464360
ro.aa.mainsku=401
ro.aa.romver=6.12.401.4
ro.onecid=
ro.prot=true
ro.build.id=MRA58K
ro.build.display.id=MRA58K release-keys
ro.build.version.incremental=662736.4
ro.build.version.sdk=23
ro.build.version.preview_sdk=0
ro.build.version.codename=REL
ro.build.version.all_codenames=REL
ro.build.version.release=6.0
ro.build.version.security_patch=2015-12-01
ro.build.version.base_os=
ro.build.date=四 12月 17 14:12:08 CST 2015
ro.build.date.utc=1450332728
ro.build.type=user
ro.build.user=buildteam
ro.build.host=ABM104
ro.build.tags=release-keys
ro.build.flavor=htc_m8-user
ro.product.model=htc_m8
ro.product.brand=htc
ro.product.name=htc_europe
ro.product.device=htc_m8
ro.product.board=MSM8974
# ro.product.cpu.abi and ro.product.cpu.abi2 are obsolete,
# use ro.product.cpu.abilist instead.
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.cpu.abilist=armeabi-v7a,armeabi
ro.product.cpu.abilist32=armeabi-v7a,armeabi
ro.product.cpu.abilist64=
ro.product.manufacturer=HTC
ro.product.locale=en-AU
ro.wifi.channels=
ro.board.platform=msm8974
# ro.build.product is obsolete; use ro.product.device
ro.build.product=htc_m8
# Do not try to parse description, fingerprint, or thumbprint
ro.build.description=6.12.401.4 CL662736 release-keys
ro.build.fingerprint=htc/htc_europe/htc_m8:6.0/MRA58K/662736.4:user/release-keys
ro.build.characteristics=default
ro.build.description=6.12.401.4 CL662736 release-keys
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=6.12.401.4 CL662736 release-keys
ro.build.changelist=662736
ro.build.project=M8_UL_M60_SENSE70_MR:464360
ro.build.sku=HTC Europe
ro.build.buildline=M8UL_HTC_WWE_M60_CRC_Sense70_Stable_MR
ro.product.version=6.12.401.4
ro.build.languageremove=
ro.build.sense.version=7.0
Error of ro.build.version.htcsdk.
ro.build.chinasense=
# end build properties
#
# from device/htc/htc_m8/system.prop
#
#
# system.prop for msm8974
#

rild.libpath=/system/lib/libhtc_rilhook.so
rild.libargs=-d /dev/smd0
persist.rild.nitz_plmn=
persist.rild.nitz_long_ons_0=
persist.rild.nitz_long_ons_1=
persist.rild.nitz_long_ons_2=
persist.rild.nitz_long_ons_3=
persist.rild.nitz_short_ons_0=
persist.rild.nitz_short_ons_1=
persist.rild.nitz_short_ons_2=
persist.rild.nitz_short_ons_3=
ril.subscription.types=NV,RUIM
DEVICE_PROVISIONED=1
# Default network type.
# 9 => GSM/UMTS/LTE mode preferred.
ro.telephony.default_network=9

#
# system props for display
#
debug.sf.hw=1
debug.egl.hw=1
debug.composition.type=gpu
persist.hwc.mdpcomp.enable=true
persist.hwc.partialupdate=1
ro.hwui.renderer.disable_opaque=true
ro.sf.lcd_density=480
debug.mdpcomp.logs=0

# Display Info
ro.product.display_resolution = 5 inch 1080p resolution

dalvik.vm.heapsize=512m
dalvik.vm.heapgrowthlimit=192m
dalvik.vm.heapstartsize=8m
dalvik.vm.heapmaxfree=8m
dalvik.vm.heapminfree=2m

dev.pm.dyn_samplingrate=1
persist.demo.hdmirotationlock=false

# +SSD_RIL
ro.baseband.arch=msm
persist.radio.process_sups_ind=1

# -SSD_RIL
# Enable IMS service by default
persist.radio.jbims=1

# Enable SAP slinet pin feature by default
persist.radio.sap_silent_pin=1

ro.hdmi.enable=true
tunnel.decode=true
tunnel.audiovideo.decode=true
lpa.decode=true
lpa.use-stagefright=true
persist.speaker.prot.enable=false
qcom.hw.aac.encoder=true
use.voice.path.for.pcm.voip=true

#system props for the MM modules

media.stagefright.enable-player=true
media.stagefright.enable-http=true
media.stagefright.enable-aac=true
media.stagefright.enable-qcp=true
media.stagefright.enable-fma2dp=true
media.stagefright.enable-scan=true
mmp.enable.3g2=true
mm.enable.smoothstreaming=true
media.aac_51_output_enabled=true
#37491 is decimal sum of supported codecs in AAL
#codecs: AVI AC3 ASF AAC QCP DTS 3G2 MP2TS
mm.enable.qcom_parser=37491

# VIDC: debug_levels
# 1:ERROR 2:HIGH 4:LOW 0:NOLOGS 7:AllLOGS
vidc.debug.level=3
#
# system props for the data modules
#
ro.use_data_netmgrd=true
persist.data.netmgrd.qos.enable=true
ro.data.large_tcp_window_size=true

#system props for time-services
persist.timed.enable=true

# System props for audio
# System props for soundhound
# bit 0: Music playback in headset mode
# bit 1: FM 48K
#persist.htc.audio.soundhound=1

#Buffer size in kbytes for compress offload playback
audio.offload.buffer.size.kb=1024

#Enable offload gapless
audio.offload.gapless.enabled=false

# System props for global effect
htc.audio.global.state=0
htc.audio.global.profile=0
htc.audio.q6.topology=0
htc.audio.global.speaker=1
htc.audio.srs.defaultbundleHS=MAX300

# System props for ALOGV
htc.audio.debug.printlow=0

#
# system prop for opengles version
#
# 196608 is decimal for 0x30000 to report version 3
ro.opengles.version=196608

#
# system prop for Bluetooth Dialup Networking
#
ro.qualcomm.bluetooth.dun=false

# system prop for Bluetooth FTP profile
ro.qualcomm.bluetooth.ftp=true
#
# system property for Bluetooth Handsfree Profile Wide Band Speech
#
ro.qualcomm.bluetooth.hfp.wbs=false

#
# system property for Bluetooth SIM Access Profile
#
ro.htc.bluetooth.sap=true

#
#system prop for Bluetooth hci transport
ro.qualcomm.bt.hci_transport=smd
#
# system prop for requesting Master role in incoming Bluetooth connection.
#
ro.bluetooth.request.master=true
#
# system prop for Bluetooth Auto connect for remote initated connections
#
ro.bluetooth.remote.autoconnect=true
# system property for Bluetooth discoverability time out in seconds
# 0: Always discoverable
#debug.bt.discoverable_time=0

# system property for Bluetooth Hardware information
ro.product.bluetooth=4.1

# config fm rssi threshold
#service.qct.fm.rssi=116
#SSD_BT- bluetooth

# system property for qcom Bluetooth stack
ro.qc.bluetooth.stack=bluedroid

# system property for bdaddr
ro.bt.bdaddr_path = /sys/module/htc_bdaddress/parameters/bdaddress

# BLE TAG (HtcBluetoothLeProfiles)
ro.bt.ble_tag = 1

# System property for cabl
#ro.qualcomm.cabl=1

#
# System props for telephony
# System prop to turn on CdmaLTEPhone always
#+ SSD_RIL: disable default value by MASD request
#telephony.lteOnCdmaDevice=1
#- SSD_RIL: disable default value by MASD request

#Simulate sdcard on /data/media
#
persist.fuse_sdcard=true
# ro.storage_structure: define the storage structure of this project
# FUSE: 0x8, FAT: 0x4, SD: 0x2, INS: 0x1
# Example: If the project has FUSE with SD card, the value should be defined as 10 (dec)
ro.storage_structure = 10

# ro.storage_encryption_type: define the storage encryption type of this project
# not support encryption: 0x0 block level: 0x1 file level: 0x2
ro.storage_encryption_type = 2
#For usb storage
ro.usb_host = 1
#
#snapdragon value add features
#
ro.qc.sdk.audio.ssr=false
##fluencetype can be "fluence" or "fluencepro" or "none"
ro.qc.sdk.audio.fluencetype=none
ro.qc.sdk.sensors.gestures=true
ro.qc.sdk.gestures.camera=false
ro.qc.sdk.camera.facialproc=false
#property to enable user to access Google WFD settings.
persist.debug.wfd.enable=1
#property to choose between virtual/external wfd display
persist.sys.wfd.virtual=0
#propery to enable VDS WFD solution
persist.hwc.enable_vds=1

# Following property will be reference by Settings.
ro.product.main_camera =HTC UltraPixel Camera
ro.product.front_camera = 5M

# Support HW rest
ro.product.hwreset = 1
ro.product.hwreset.timer1 = 6
ro.product.hwreset.timer2 = 9

# M8 HW info
ro.product.ram = 2GB

# wifi
wifi.softap.interface=wlan0
wifi.softapconcurrent.interface=softap.0
wifi.miracastconcurrent.scan=WCN3680
init.svc.wpa_supplicant=
init.svc.dhcpcd_wlan0=
dhcp.wlan0.autoip=
dhcp.wlan0.dns1=
dhcp.wlan0.dns2=
dhcp.wlan0.dns3=
dhcp.wlan0.dns4=
dhcp.wlan0.gateway=
dhcp.wlan0.ipaddress=
dhcp.wlan0.leasetime=
dhcp.wlan0.mask=
dhcp.wlan0.ooxx=
dhcp.wlan0.pid=
dhcp.wlan0.reason=
dhcp.wlan0.result=
dhcp.wlan0.server=
net.wlan0.dns1=
net.wlan0.dns2=
wifi.wpa_supp_ready=
wlan.driver.status=
wifi.interface=wlan0
wifi.supplicant_scan_interval=15
persist.wifi.v6=true
persist.wifi.v6.rs.count=5
persist.wifi.v6.rs.timeout=5
ro.product.wifi = 802.11 a/b/g/n/ac
sys.stt.ssr.no_prompt=1
tunnel.audio.encode = false

# For Embadded DIAG
ro.chipset.vendor=QCT
ro.chipset.model=MSM8974
ro.chipset.version=1.x

# ro.storage_encryption_type: define the storage encryption type of this project
# not support encryption: 0x0 block level: 0x1 file level: 0x2
ro.storage_encryption_type = 2

# Property to enable EAB service
persist.rcs.supported = 1

# Property to enable VT function in IMS library
persist.radio.VT_ENABLE = 1

# Property to enable HYBRID mode at android side, IMS daemon will use qmi to communicate with modem
persist.radio.VT_HYBRID_ENABLE = 1

# Property to enable VT AV timer, settings between audio/video codec
# DO NOT set this system property; per QCOM information, it should only apply to Fusion device
#persist.radio.VT_USE_MDM_TIME = 1

# Property to enable VT ROTATION in ims library
persist.radio.ROTATION_ENABLE = 1

# Property to enable PLI for VT call video quality
# persist.radio.RATE_ADAPT_ENABLE = 1

# Property to disable IMS_DEBUG log
persist.ims.disableDebugLogs = 1

# For VOLD storage master key encryption algorithm scrypt
ro.crypto.scrypt_params=16:3:1

# define the device properties of GSMA supported by current device
ro.htc.gsma.BATTERY_LOW_MODE = true
ro.htc.gsma.BATTERY_OFF_MODE = false
ro.htc.gsma.FELICA = false
ro.htc.gsma.HCI_SWP = true
ro.htc.gsma.MIFARE_CLASSIC = true
ro.htc.gsma.MIFARE_DESFIRE = true
ro.htc.gsma.MULTI_ACTIVE_CEE = true
ro.htc.gsma.NFC_FORUM_TYPE3 = false
ro.htc.gsma.OMAPI = true

#
# ADDITIONAL_BUILD_PROPERTIES
#
persist.preload.common=0
persist.zygote.preload_threads=3
persist.camera.antibanding=50
persist.camera.tuning_spec=htc
ro.com.android.dataroaming=false
keyguard.no_require_sim=true
ro.config.ringtone=Ring_Synth_04.ogg
ro.config.notification_sound=pixiedust.ogg
ro.carrier=unknown
ro.config.alarm_alert=Alarm_Classic.ogg
drm.service.enabled=true
ro.setupwizard.mode=OPTIONAL
ro.com.google.gmsversion=6.0_r1
dalvik.vm.heapstartsize=8m
dalvik.vm.heapgrowthlimit=192m
dalvik.vm.heapsize=512m
dalvik.vm.heaptargetutilization=0.75
dalvik.vm.heapminfree=2m
dalvik.vm.heapmaxfree=8m
ro.vendor.extension_library=/vendor/lib/libqc-opt.so
persist.radio.apm_sim_not_pwdn=1
persist.ims.disableDebugLogs=1
persist.ims.disableADBLogs=1
persist.ims.disableQXDMLogs=1
persist.ims.disableIMSLogs=1
persist.sys.dalvik.vm.lib.2=libart
dalvik.vm.isa.arm.variant=krait
dalvik.vm.isa.arm.features=default
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
ro.gps.agps_provider=1
ro.expect.recovery_id=0x40d84d5b71da1caa03cc15fa17a4f3aff0a6b056000000000000000000000000

Edit_3: content from AAInfo.txt:

TaskID : 464360
Project : M8_UL_M60_SENSE70_MR
SKU : HTC Europe[401]
ROM Ver : 6.12.401.4
Customization Id : 1126034
RCMS Id : 356

My Conclusion: it is legit but i think this is 6.12.401.4 and not the newer 6.12.401.4_R

perhaps [MENTION=494185]LlabTooFeR[/MENTION] can confirm that

My Final Conclusion: YES!!!! It is legit ... [MENTION=494185]LlabTooFeR[/MENTION] release new MaximusHD 12.0 ... the base and firmware are the same files :victory: