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Analysis
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max time kernel
46s -
max time network
53s -
platform
windows10-2004_x64 -
resource
win10v2004-20230220-en -
resource tags
arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system -
submitted
13/03/2023, 08:30
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://cdn.discordapp.com/attachments/1045003118900940843/1054445358895353876/Krnl.zip
Resource
win10v2004-20230220-en
General
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Target
https://cdn.discordapp.com/attachments/1045003118900940843/1054445358895353876/Krnl.zip
Malware Config
Signatures
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Program crash 1 IoCs
pid pid_target Process procid_target 2692 3056 WerFault.exe 28 -
Checks processor information in registry 2 TTPs 5 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Revision firefox.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~Mhz firefox.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\VendorIdentifier firefox.exe Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 firefox.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Update Signature firefox.exe -
Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs
description ioc Process Set value (data) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\ClientSupported_MigrationTime = 575ec7859e45d901 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\PhishingFilter iexplore.exe -
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running" iexplore.exe Set value (str) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Main IEXPLORE.EXE Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\MINIE\TabBandWidth = "500" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31020430" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{BACF8EC4-C181-11ED-B7D7-4221DB3A75C8} = "0" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\VersionManager iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "2411062416" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50" iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "2411062416" iexplore.exe Set value (data) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000 iexplore.exe Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\Software\Microsoft\Internet Explorer\MINIE iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31020430" iexplore.exe Set value (int) \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200" iexplore.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1013461898-3711306144-4198452673-1000_Classes\Local Settings firefox.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 408 firefox.exe Token: SeDebugPrivilege 408 firefox.exe -
Suspicious use of FindShellTrayWindow 5 IoCs
pid Process 532 iexplore.exe 408 firefox.exe 408 firefox.exe 408 firefox.exe 408 firefox.exe -
Suspicious use of SendNotifyMessage 3 IoCs
pid Process 408 firefox.exe 408 firefox.exe 408 firefox.exe -
Suspicious use of SetWindowsHookEx 5 IoCs
pid Process 532 iexplore.exe 532 iexplore.exe 4072 IEXPLORE.EXE 4072 IEXPLORE.EXE 408 firefox.exe -
Suspicious use of WriteProcessMemory 64 IoCs
description pid Process procid_target PID 532 wrote to memory of 4072 532 iexplore.exe 87 PID 532 wrote to memory of 4072 532 iexplore.exe 87 PID 532 wrote to memory of 4072 532 iexplore.exe 87 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 4460 wrote to memory of 408 4460 firefox.exe 101 PID 408 wrote to memory of 4768 408 firefox.exe 102 PID 408 wrote to memory of 4768 408 firefox.exe 102 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 PID 408 wrote to memory of 2284 408 firefox.exe 103 -
Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Program Files\Internet Explorer\iexplore.exe"C:\Program Files\Internet Explorer\iexplore.exe" https://cdn.discordapp.com/attachments/1045003118900940843/1054445358895353876/Krnl.zip1⤵
- Modifies Internet Explorer Phishing Filter
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:532 -
C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:532 CREDAT:17410 /prefetch:22⤵
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
PID:4072
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -pss -s 476 -p 3056 -ip 30561⤵PID:2968
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C:\Windows\system32\WerFault.exeC:\Windows\system32\WerFault.exe -u -p 3056 -s 17561⤵
- Program crash
PID:2692
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe"1⤵
- Suspicious use of WriteProcessMemory
PID:4460 -
C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe"2⤵
- Checks processor information in registry
- Modifies registry class
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:408 -
C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.0.2092688267\174767378" -parentBuildID 20221007134813 -prefsHandle 1844 -prefMapHandle 1836 -prefsLen 20890 -prefMapSize 232675 -appDir "C:\Program Files\Mozilla Firefox\browser" - {39a0f685-cf06-4cb5-9fef-0db89769b3c4} 408 "\\.\pipe\gecko-crash-server-pipe.408" 1940 1f38b216558 gpu3⤵PID:4768
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.1.56869509\402952563" -parentBuildID 20221007134813 -prefsHandle 2304 -prefMapHandle 2300 -prefsLen 20926 -prefMapSize 232675 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {c80ab5aa-19ec-4de4-b705-9b64193caa4a} 408 "\\.\pipe\gecko-crash-server-pipe.408" 2316 1f38a00fb58 socket3⤵PID:2284
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.2.630730266\1758044866" -childID 1 -isForBrowser -prefsHandle 3164 -prefMapHandle 2692 -prefsLen 21009 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {bb35f439-e859-427f-95bb-4d7df090841c} 408 "\\.\pipe\gecko-crash-server-pipe.408" 3060 1f38df04758 tab3⤵PID:744
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.3.1388185759\1655993931" -childID 2 -isForBrowser -prefsHandle 3576 -prefMapHandle 3572 -prefsLen 26519 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {d3c05d32-5c4e-4b87-9893-42cc500d94f0} 408 "\\.\pipe\gecko-crash-server-pipe.408" 3588 1f3fd15d358 tab3⤵PID:2448
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.4.397126111\68269335" -childID 3 -isForBrowser -prefsHandle 3972 -prefMapHandle 3968 -prefsLen 26519 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {16a53c1d-15dc-4e01-88ec-4fe481e23409} 408 "\\.\pipe\gecko-crash-server-pipe.408" 3984 1f38ee35158 tab3⤵PID:1332
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.5.873721071\1025769142" -childID 4 -isForBrowser -prefsHandle 5104 -prefMapHandle 5116 -prefsLen 26659 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {c78bd47d-2ae5-47d4-93dc-2db3d567c85b} 408 "\\.\pipe\gecko-crash-server-pipe.408" 5088 1f391a59d58 tab3⤵PID:3596
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.6.1047966446\778759871" -childID 5 -isForBrowser -prefsHandle 5348 -prefMapHandle 5352 -prefsLen 26659 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {bcd1a8c3-9599-4560-a22b-12eedb2b8afe} 408 "\\.\pipe\gecko-crash-server-pipe.408" 5164 1f391a5a358 tab3⤵PID:2336
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.7.983706582\1053112916" -childID 6 -isForBrowser -prefsHandle 5552 -prefMapHandle 5564 -prefsLen 26659 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {93284c45-0350-4e82-a91b-0096ec4758a7} 408 "\\.\pipe\gecko-crash-server-pipe.408" 5548 1f391a5a958 tab3⤵PID:2956
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.8.342480228\123456110" -childID 7 -isForBrowser -prefsHandle 5732 -prefMapHandle 5736 -prefsLen 26659 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {f6952078-6b67-4019-8933-4b0c46258e5b} 408 "\\.\pipe\gecko-crash-server-pipe.408" 5724 1f391a59158 tab3⤵PID:5240
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C:\Program Files\Mozilla Firefox\firefox.exe"C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="408.9.538223708\496510663" -childID 8 -isForBrowser -prefsHandle 5840 -prefMapHandle 6004 -prefsLen 26930 -prefMapSize 232675 -jsInitHandle 1476 -jsInitLen 246848 -a11yResourceId 64 -parentBuildID 20221007134813 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {b59cd164-0585-4f6c-b4ce-485176437b49} 408 "\\.\pipe\gecko-crash-server-pipe.408" 6012 1f38a010d58 tab3⤵PID:5484
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\6exu9k4v.default-release\activity-stream.discovery_stream.json.tmp
Filesize162KB
MD56c36cff02e48007a2490f370a92aade5
SHA1121f9a91df2b854d242880a8dbc3387536389e40
SHA256a66358bca9904f9ef6665d4343a7409010414a31425a2d4ce959acd7a889875b
SHA51226651d11d72beb6424cef11913c6a8b9e9b0bbe1a04cde70e381a5105a597bf507c9dc06e1ba30b3356564d192de2bc5e6b58fee14c819ff4966ae7977cefb55
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Filesize
6KB
MD525a613b276657f38e577bc528845fae6
SHA11e1ea0d4084053d7509a210c714e49829959a7ef
SHA256f3b8285a1ab9fdb51cba52324c6980706ebe29a523f2d9a63d6e789c9ece69f3
SHA512ac926c2a30f8ddddc8af80a3c2c3e07562549cf61c282000e5a8a62167afbded9e4da4698068d66e2f978cd45eac915c2e19736e1a5da4e9fcb7d985c4febdac
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Filesize
6KB
MD5d88c107b2da4af9346ca0c42eb8dcbdf
SHA1f5940c996d6344212796bfadb471338995872021
SHA2566e5e95e04897f30caed511ca1573ef1542897074de5daa7af766c7e1561fcaff
SHA5128779eeaab996c2bfbdeb47aae37ca84c238b4123ed31811c63049dc8f5adbe4bd1cb17669683373b725cf7efba1727be8bbcb5bedadd40387e7f6a562a0620eb
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Filesize
6KB
MD5108b97b1ff7efbdb1aecce96d55ff2e5
SHA1bb72b2e0c3d859fe5e821632307a32df331b55e1
SHA256c5e19d4313b524fffc4859f4fac05ea3dcf408714a736dbd0bb7fcdf5131f80e
SHA512e0f7678424e68957a1cb521786e9e4e54c179f9a263b04d0c6a96147cb1e242b58bda3e74e6f142dcd9b6dd313a0061c3050af334b149eab9a8040f923da84dc
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C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\6exu9k4v.default-release\sessionstore-backups\recovery.jsonlz4
Filesize1KB
MD50422e30a714034b11f166be221f49c22
SHA1e8adb163c520b1b99215d193510675291055d094
SHA256a107bb7c675b62ccb1ad2a5900484d034ce4b1f77bde9a27ee005f587e25c02c
SHA512cc375d902b83dd4e5ebcc1451790e8ca7f27724fe2554af8804ad7e24299f3b54eb166e48006dd97e818d4f8bfcd1a517f8b97597744f77874f429a759423e18