Analysis Overview
SHA256
89c68ff666770a482787e6d27b3c5b5c6efa46fd09c4fa64758f37995b218049
Threat Level: Likely malicious
The file Nezur_External.zip was found to be: Likely malicious.
Malicious Activity Summary
Sets service image path in registry
Unsigned PE
Checks processor information in registry
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Modifies registry class
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-02 22:48
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-02 22:48
Reported
2024-03-02 22:52
Platform
win10v2004-20240226-it
Max time kernel
114s
Max time network
153s
Command Line
Signatures
Sets service image path in registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\frAQBc8Wsa1xVPfv\ImagePath = "\\??\\C:\\Users\\Admin\\AppData\\Local\\Temp\\frAQBc8Wsa1xVPfv" | C:\Users\Admin\AppData\Local\Temp\Nezur.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Signature | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~Mhz | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~Mhz | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1904519900-954640453-4250331663-1000_Classes\Local Settings | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
Suspicious behavior: LoadsDriver
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Nezur.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Nezur.exe | N/A |
| Token: SeLoadDriverPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Nezur.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Mozilla Firefox\firefox.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\Nezur.exe
"C:\Users\Admin\AppData\Local\Temp\Nezur.exe"
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe"
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe"
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.0.1137267429\185598148" -parentBuildID 20221007134813 -prefsHandle 1924 -prefMapHandle 1916 -prefsLen 20749 -prefMapSize 233444 -appDir "C:\Program Files\Mozilla Firefox\browser" - {1d853db9-b01f-4ce1-ade8-8076dfe25c0a} 116 "\\.\pipe\gecko-crash-server-pipe.116" 2016 154f4ceec58 gpu
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.1.1428793565\711344106" -parentBuildID 20221007134813 -prefsHandle 2396 -prefMapHandle 2392 -prefsLen 20785 -prefMapSize 233444 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {a78aa0b1-6a5e-47f2-9a11-c46c66661f9e} 116 "\\.\pipe\gecko-crash-server-pipe.116" 2408 154f4bfd858 socket
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.2.783608327\1247372142" -childID 1 -isForBrowser -prefsHandle 3424 -prefMapHandle 3420 -prefsLen 20823 -prefMapSize 233444 -jsInitHandle 1224 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {79e1d4f9-085d-46c4-a44e-79e0684c5087} 116 "\\.\pipe\gecko-crash-server-pipe.116" 3436 154f8cac158 tab
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.3.2142880874\381891291" -childID 2 -isForBrowser -prefsHandle 3128 -prefMapHandle 3040 -prefsLen 26066 -prefMapSize 233444 -jsInitHandle 1224 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {c88a18a7-6a9b-4bc5-85bb-d4d3284facca} 116 "\\.\pipe\gecko-crash-server-pipe.116" 3672 154e8461c58 tab
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.4.468452932\1682337514" -childID 3 -isForBrowser -prefsHandle 3824 -prefMapHandle 3820 -prefsLen 26066 -prefMapSize 233444 -jsInitHandle 1224 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {62ac4478-c716-4fe0-a360-718bb407e4d8} 116 "\\.\pipe\gecko-crash-server-pipe.116" 2912 154f91fbe58 tab
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.5.370840418\1348486177" -childID 4 -isForBrowser -prefsHandle 4856 -prefMapHandle 4936 -prefsLen 26125 -prefMapSize 233444 -jsInitHandle 1224 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {c4da655e-6867-4778-90b5-8986c5a9dc46} 116 "\\.\pipe\gecko-crash-server-pipe.116" 4976 154f91f9458 tab
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.6.45025195\216765837" -childID 5 -isForBrowser -prefsHandle 5080 -prefMapHandle 5084 -prefsLen 26125 -prefMapSize 233444 -jsInitHandle 1224 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {62615586-7e93-4009-827c-955eb9ccfd0b} 116 "\\.\pipe\gecko-crash-server-pipe.116" 4920 154fb194c58 tab
C:\Program Files\Mozilla Firefox\firefox.exe
"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="116.7.267100102\1520985145" -childID 6 -isForBrowser -prefsHandle 5280 -prefMapHandle 5284 -prefsLen 26125 -prefMapSize 233444 -jsInitHandle 1224 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {81c62a88-75b5-4f4c-9d96-0b6bbef3d122} 116 "\\.\pipe\gecko-crash-server-pipe.116" 5272 154fb192558 tab
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=it --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4064 --field-trial-handle=2220,i,17752012012504442513,579370378644961515,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 2.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 203.197.79.204.in-addr.arpa | udp |
| GB | 142.250.200.14:443 | tcp | |
| GB | 172.217.169.10:443 | tcp | |
| US | 8.8.8.8:53 | contile.services.mozilla.com | udp |
| US | 8.8.8.8:53 | content-signature-2.cdn.mozilla.net | udp |
| US | 34.117.237.239:443 | contile.services.mozilla.com | tcp |
| US | 8.8.8.8:53 | contile.services.mozilla.com | udp |
| US | 8.8.8.8:53 | contile.services.mozilla.com | udp |
| US | 34.160.144.191:443 | content-signature-2.cdn.mozilla.net | tcp |
| US | 8.8.8.8:53 | prod.content-signature-chains.prod.webservices.mozgcp.net | udp |
| US | 8.8.8.8:53 | push.services.mozilla.com | udp |
| US | 8.8.8.8:53 | prod.content-signature-chains.prod.webservices.mozgcp.net | udp |
| US | 8.8.8.8:53 | autopush.prod.mozaws.net | udp |
| US | 8.8.8.8:53 | autopush.prod.mozaws.net | udp |
| US | 8.8.8.8:53 | shavar.services.mozilla.com | udp |
| US | 44.239.242.57:443 | shavar.services.mozilla.com | tcp |
| US | 8.8.8.8:53 | firefox.settings.services.mozilla.com | udp |
| US | 8.8.8.8:53 | shavar.prod.mozaws.net | udp |
| US | 8.8.8.8:53 | shavar.prod.mozaws.net | udp |
| US | 34.149.100.209:443 | firefox.settings.services.mozilla.com | tcp |
| US | 8.8.8.8:53 | prod.remote-settings.prod.webservices.mozgcp.net | udp |
| US | 34.107.243.93:443 | autopush.prod.mozaws.net | tcp |
| US | 8.8.8.8:53 | prod.remote-settings.prod.webservices.mozgcp.net | udp |
| N/A | 127.0.0.1:49834 | tcp | |
| US | 8.8.8.8:53 | 57.242.239.44.in-addr.arpa | udp |
| N/A | 127.0.0.1:49840 | tcp | |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 13.107.253.67:443 | tcp | |
| US | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\datareporting\glean\pending_pings\15706b5c-494f-4a72-9890-d3f737873ab6
| MD5 | af2c94bc6484d3cda157d0bef52e7d13 |
| SHA1 | 5337aa071e67213542ec29f22369bba7a5990153 |
| SHA256 | d0be23d1f42d93fa19b8d01255336812f86e68962911aa2a4d194d0825408323 |
| SHA512 | 721cb86810a88c62631448a0414efc22efad17c87dfafadd4cda23dd4160c1a7c6421b3bf7e11c9c46f6df73e33c36fc385d9c086861195e986265677ec4e786 |
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\datareporting\glean\pending_pings\d007c988-4231-472a-aebb-3dd03d30db53
| MD5 | b73912225f327625487edeec45441718 |
| SHA1 | f88b6aa3dd536f1e577f400cc5823394bfc79e4e |
| SHA256 | 2a225a0de5b7fadccd22841a591a8cbe9d766402130747ee417ecb371e832715 |
| SHA512 | 052bba7ad3438cfb40b659ec54f74995f781922b79cd04c17d2ea88e3639641b003cdd7c80d33d169e28f2dca8398e49b302a00ac606b0f504dcad64d2c84586 |
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\datareporting\glean\db\data.safe.bin
| MD5 | cf34e38ef27bcf375ed4bbdc9fbcf0f3 |
| SHA1 | 2e7495b1d5f4d63beabd54330926ebdc9157e1a0 |
| SHA256 | f7690b0f5fe45cdb1427c739614d8a128dd361bb89f70d6499b55e88b20640ca |
| SHA512 | 8ecf991d27b6b704f1c52afcbc336373b80c6137d4b6ccc170038b7e36f6cbe0c90e7ff963e46994b2c895855b29476aad22b2494aea01873c553d647f6c0a51 |
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\prefs.js
| MD5 | a0397d6a9b197196d2bc61559b1aff07 |
| SHA1 | be2ba383e80a39a0e1484335a8ab5b86a8f68c66 |
| SHA256 | ffbfb35ad5ff22f440312a00044cfc4009795696a3703d6ec704526515470df5 |
| SHA512 | 88492508a836b79b051641fdacd99690a5cd1529027226b144a17acc88632d7e4e22b839f260c79919e9baaabf81de81730dc85d8ee9954ec83414f96a5ed5f0 |
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\prefs-1.js
| MD5 | 1a6fd1e334cccdbf59d453ce44ccc77a |
| SHA1 | ff0d01d45d12ede8fbe39ec3dd01d7d85a57f018 |
| SHA256 | 84b47130311b40fec354a08ce3e6f68285be3591144f7db3b9a75663fcd6ef4e |
| SHA512 | 254959f74c33fd2b4d4f39551fa36c5ae9375ded03c65f08d9f47f7e0d014f7eedc314b810a7fb8461ca363a043e19c6b2794cc672a497db33bc5d6ca85fea93 |
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\prefs-1.js
| MD5 | 7e7c356908416e325490aacc338c7820 |
| SHA1 | 80cfc5f7c56a3ff0fe0e3f666fc3a465367b5e4a |
| SHA256 | 1a1d1af1bacff5512ae3269c6593a3b49267139290c6654c69aa9a0d943a767b |
| SHA512 | 2b17407f021e6826d25390243cf4c6350ad3631b0b22a5d0c9b68b5decc0b62429517203aacb6cd4dc9ea973d9d2c35d970660a48a424f77c09d62dfda2ad438 |
C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\f97d9gc7.default-release\sessionstore.jsonlz4
| MD5 | e816786b75d52e4b5415558231825fde |
| SHA1 | d9ef56be6ab1a0c07227c4e42d6bf1df9de963eb |
| SHA256 | 8735ec2c7cc4b4c52b204589e049ed5c3ef8b5ef1ce888ff454e319f9803a126 |
| SHA512 | f0c8c0624d0322db1fb2a9c79a6ad0686d90283e1ee8f9c2e9310f5271a33c5c6a3148435c3b405646a523501b548487eb38d5b9b05225cbb5ab9ff50561ac41 |