hxxps://anonymfile[.]com/bV34W/free[.]exe

Analysis

max time kernel
136s
max time network
167s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
31-03-2023 15:47

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General

Target

https://anonymfile.com/bV34W/free.exe

Score

8^/10

bootkit persistence

Malware Config

Signatures

Downloads MZ/PE file
Executes dropped EXE 2 IoCs

Processes:

ffree.exeffree.exe

pid process

1244 ffree.exe
4060 ffree.exe
Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
bootkit persistence

Bootkit
T1067

Processes:

ffree.exeffree.exe

description ioc process

File opened for modification \??\PhysicalDrive0 ffree.exe
File opened for modification \??\PhysicalDrive0 ffree.exe

pid	process
1244	ffree.exe
4060	ffree.exe

description	ioc	process
File opened for modification	\??\PhysicalDrive0	ffree.exe
File opened for modification	\??\PhysicalDrive0	ffree.exe

Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs

Modify Registry

T1112

Processes:

iexplore.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\PhishingFilter	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\PhishingFilter\ClientSupported_MigrationTime = d42e80ebae45d901	iexplore.exe

Modifies Internet Explorer settings 1 TTPs 42 IoCs

adware spyware

Modify Registry

T1112

Processes:

iexplore.exeIEXPLORE.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Main\FullScreen = "no"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\anonymfile.com	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\NextUpdateDate = "387049861"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\Main	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = a0db5b18f963d901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\en-US = "en-US.1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\Main	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Main\WindowsSearch\Version = "WS not running"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateLowDateTime = "108676468"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateLowDateTime = "108676468"	IEXPLORE.EXE
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb0100000016b1b6fc7cfc59429b2ebf78760d5fe3000000000200000000001066000000010000200000008aa26fcb98336c746cd51627e5b41e19d6f7f227b0b8359744947bd1bd70bf19000000000e8000000002000020000000e930b06d8c0ce4f47773b60a098913ca1cafa4c26924eefc10ac1b3180e56bd2200000009eb83706a4eec577c6270aa635a163fbae474bcf2c621f3837161a15329875a7400000006e6e2bf6c98332d86563e3fced6312750c90388cfb98f9dfe7b54f0da747557d49a4c4c9904890d6b27a74350aae88531e7263f44ce4a5c43c9514b74cd170da	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\LastProcessed = f0703a18f963d901	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Main\CompatibilityFlags = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\Recovery\AdminActive	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\VersionManager	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLLowDateTime = "1251635200"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\TabbedBrowsing	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\AdminActive\{2ED3081B-CFEC-11ED-9EF6-660D1B6B73D3} = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\DOMStorage\anonymfile.com	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\DOMStorage\anonymfile.com\NumberOfSubdomains = "1"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastUpdateHighDateTime = "31024121"	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NTPFirstRun = "1"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Window_Placement = 2c0000000200000003000000ffffffffffffffffffffffffffffffff2400000024000000aa04000089020000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\Recovery\PendingRecovery\AdminActive = "0"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\IESettingSync	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastTTLHighDateTime = "50"	IEXPLORE.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\RepId\PublicId = "{23D83D9D-6DDE-456C-AF1E-09E9ACC744A2}"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\VersionManager\LastCheckForUpdateHighDateTime = "31024121"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\DomainSuggestion\FileNames\	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\Recovery\PendingRecovery	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\Main\WindowsSearch	IEXPLORE.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\IESettingSync\SlowSettingTypesChanged = "2"	IEXPLORE.EXE
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Internet Explorer\RepId	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Internet Explorer\TabbedBrowsing\NewTabPage\DecayDateQueue = 01000000d08c9ddf0115d1118c7a00c04fc297eb0100000016b1b6fc7cfc59429b2ebf78760d5fe3000000000200000000001066000000010000200000008bd1b02d1908428f09014078d3bd8fa576d8b785afda1c8cb6fedc33bbb9daa7000000000e800000000200002000000076dfbb785fdd95f6397422912ee68ff2488ad8ae49adb2db64bfc46013783d6120000000ca47bee48c1c23655bfbf8cd600e78a5ac3c8a7a11fc74e621e4c3aed3d5b52540000000a2a269baddba7ee5f852ad3a5a0b27eca1ff23d04a5ed41b1a64f4a5410cfd16db24ff43a781b2d48628fce80adc2f76472fd070305b84c5bd92d29703b25502	iexplore.exe

Modifies registry class 35 IoCs

Processes:

iexplore.exeOpenWith.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\Mode = "4"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\GroupByKey:FMTID = "{B725F130-47EF-101A-A5F1-02608C9EEBAC}"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\LogicalViewMode = "1"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\GroupView = "4294967295"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\GroupByDirection = "4294967295"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\MRUListEx = ffffffff	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\Sort = 000000000000000000000000000000000100000030f125b7ef471a10a5f102608c9eebac0e000000ffffffff	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots = 02	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\KnownFolderDerivedFolderType = "{885A186E-A440-4ADA-812B-DB871B942259}"	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell\SniffedFolderType = "Downloads"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = 00000000ffffffff	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0 = 14002e8005398e082303024b98265d99428e115f0000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\IconSize = "16"	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\FFlags = "1"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings	OpenWith.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\MRUListEx = 00000000ffffffff	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\GroupByKey:PID = "14"	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\ColInfo = 00000000000000000000000000000000fddfdffd100000000000000000000000040000001800000030f125b7ef471a10a5f102608c9eebac0a0000001001000030f125b7ef471a10a5f102608c9eebac0e0000009000000030f125b7ef471a10a5f102608c9eebac040000007800000030f125b7ef471a10a5f102608c9eebac0c00000050000000	iexplore.exe
Set value (data)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0 = 14001f50e04fd020ea3a6910a2d808002b30309d0000	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0\NodeSlot = "1"	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance\	iexplore.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\ComDlg\{885A186E-A440-4ADA-812B-DB871B942259}\FFlags = "1092616257"	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\0\0	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1\Shell	iexplore.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\Bags\1	iexplore.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

OpenWith.exe

pid process

4856 OpenWith.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

ffree.exe

description pid process

Token: SeShutdownPrivilege 4060 ffree.exe
Suspicious use of FindShellTrayWindow 6 IoCs

Processes:

iexplore.exeIEXPLORE.EXE

pid process

4660 iexplore.exe
1020 IEXPLORE.EXE
1020 IEXPLORE.EXE
4660 iexplore.exe
4660 iexplore.exe
4660 iexplore.exe
Suspicious use of SendNotifyMessage 2 IoCs

Processes:

IEXPLORE.EXE

pid process

1020 IEXPLORE.EXE
1020 IEXPLORE.EXE

pid	process
4856	OpenWith.exe

description	pid	process
Token: SeShutdownPrivilege	4060	ffree.exe

pid	process
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE

Suspicious use of SetWindowsHookEx 42 IoCs

Processes:

iexplore.exeIEXPLORE.EXEOpenWith.exe

pid	process
4660	iexplore.exe
4660	iexplore.exe
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
4856	OpenWith.exe
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
1020	IEXPLORE.EXE
4660	iexplore.exe
4660	iexplore.exe
4660	iexplore.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

iexplore.exe

description	pid	process	target process
PID 4660 wrote to memory of 1020	4660	iexplore.exe	IEXPLORE.EXE
PID 4660 wrote to memory of 1020	4660	iexplore.exe	IEXPLORE.EXE
PID 4660 wrote to memory of 1020	4660	iexplore.exe	IEXPLORE.EXE
PID 4660 wrote to memory of 1244	4660	iexplore.exe	ffree.exe
PID 4660 wrote to memory of 1244	4660	iexplore.exe	ffree.exe
PID 4660 wrote to memory of 4060	4660	iexplore.exe	ffree.exe
PID 4660 wrote to memory of 4060	4660	iexplore.exe	ffree.exe

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.
persistence

Query Registry
T1012
Uses Volume Shadow Copy WMI provider
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Program Files\Internet Explorer\iexplore.exe
"C:\Program Files\Internet Explorer\iexplore.exe" https://anonymfile.com/bV34W/free.exe
1⤵
- Modifies Internet Explorer Phishing Filter
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4660

C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
"C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:4660 CREDAT:17410 /prefetch:2
2⤵
- Modifies Internet Explorer settings
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
PID:1020

C:\Users\Admin\Downloads\ffree.exe
"C:\Users\Admin\Downloads\ffree.exe"
2⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
PID:1244

C:\Users\Admin\Downloads\ffree.exe
"C:\Users\Admin\Downloads\ffree.exe"
2⤵
- Executes dropped EXE
- Writes to the Master Boot Record (MBR)
- Suspicious use of AdjustPrivilegeToken
PID:4060

C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
1⤵
- Modifies registry class
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of SetWindowsHookEx
PID:4856

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Bootkit

T1067

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\feo4h2u\imagestore.dat
Filesize
39KB

MD5
b7bb5c56cbc56dcc717db5b6e9408d2d

SHA1
92f493e02a494ae40f0885c935cb960048e6afc3

SHA256
ec4067793b48aaac20dc4d7366a701a6a5036c673f6e7de81ed0d8518e7cb1c3

SHA512
8d46b920623d2b8837cd7803e925ddc51c022f9648ffb84ecc52229a9ffa71aae7105a2156a734869d4fff1ba23d063935a1de59db8d9493814da488015f5308

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\Explorer\iconcache_idx.db
Filesize
28KB

MD5
9e52d627e5e958681a2ea9db1f5be0c1

SHA1
3d2f49e39717fc2140962b614bd3ecfe2e4d8764

SHA256
0b510e541b645552ac7db8b449f45374bfdc2b1b687177cfea8b3d178bbf1e7e

SHA512
4e57c6f0e2686ee04ae1b5cdfb16947916ca69446db50c221afc7cbd270899a84fccdfbbab0399122a8d69b46439a7cd7b28590a7a39e610136e7054cfd54aa9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\6K3GJRJ1\logo-anon-warning[1].png
Filesize
39KB

MD5
d52ea6ebcd0b10dcf112a9d6c43ceee0

SHA1
641e5277e2e079f0e88e2899879fda8882e58d28

SHA256
77cb73f16f049b51c0a81c12ed878e11efe3b9a71c632a3bdb647d963059532e

SHA512
50bda018584b94b24983217f1bc3582f21da29112df491ac45e30e2208145623bc000f559bf9d910325ea47f11a16ae023c0ee81705ab1f482865fd9c0aeebce

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\UUIKWEAJ\e5bd4e84-d876-4e60-9695-3416e9ce2522.jfj917y.partial
Filesize
221KB

MD5
a083918dbf9fe0fe4dd0e4aa553d678f

SHA1
4bf49c54b4d002af3e6d1427a8fe53ba5db7b003

SHA256
aae9a7e95acbbe7ab48ee0d732f2d15866f7794cd7d6415eb68c57124cd40b27

SHA512
17f2fd252b7227557c23bde35f2709dea27f5552b733459d022db99f340fea3151f715dbff5e456ab4d52489f32c9a7496a7576c6b9a077279ed425fae9c9cf0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\UUIKWEAJ\suggestions[1].en-US
Filesize
17KB

MD5
5a34cb996293fde2cb7a4ac89587393a

SHA1
3c96c993500690d1a77873cd62bc639b3a10653f

SHA256
c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

SHA512
e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\WPCK8CWE\e5bd4e84-d876-4e60-9695-3416e9ce2522[1]
Filesize
221KB

MD5
a083918dbf9fe0fe4dd0e4aa553d678f

SHA1
4bf49c54b4d002af3e6d1427a8fe53ba5db7b003

SHA256
aae9a7e95acbbe7ab48ee0d732f2d15866f7794cd7d6415eb68c57124cd40b27

SHA512
17f2fd252b7227557c23bde35f2709dea27f5552b733459d022db99f340fea3151f715dbff5e456ab4d52489f32c9a7496a7576c6b9a077279ed425fae9c9cf0

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\WPCK8CWE\jquery.min[1].js
Filesize
87KB

MD5
8fb8fee4fcc3cc86ff6c724154c49c42

SHA1
b82d238d4e31fdf618bae8ac11a6c812c03dd0d4

SHA256
ff1523fb7389539c84c65aba19260648793bb4f5e29329d2ee8804bc37a3fe6e

SHA512
f3de1813a4160f9239f4781938645e1589b876759cd50b7936dbd849a35c38ffaed53f6a61dbdd8a1cf43cf4a28aa9fffbfddeec9a3811a1bb4ee6df58652b31

Download Submit
C:\Users\Admin\Downloads\e5bd4e84-d876-4e60-9695-3416e9ce2522.1hegc17.partial
Filesize
221KB

MD5
a083918dbf9fe0fe4dd0e4aa553d678f

SHA1
4bf49c54b4d002af3e6d1427a8fe53ba5db7b003

SHA256
aae9a7e95acbbe7ab48ee0d732f2d15866f7794cd7d6415eb68c57124cd40b27

SHA512
17f2fd252b7227557c23bde35f2709dea27f5552b733459d022db99f340fea3151f715dbff5e456ab4d52489f32c9a7496a7576c6b9a077279ed425fae9c9cf0

Download Submit
C:\Users\Admin\Downloads\ffree.exe
Filesize
221KB

MD5
a083918dbf9fe0fe4dd0e4aa553d678f

SHA1
4bf49c54b4d002af3e6d1427a8fe53ba5db7b003

SHA256
aae9a7e95acbbe7ab48ee0d732f2d15866f7794cd7d6415eb68c57124cd40b27

SHA512
17f2fd252b7227557c23bde35f2709dea27f5552b733459d022db99f340fea3151f715dbff5e456ab4d52489f32c9a7496a7576c6b9a077279ed425fae9c9cf0

Download Submit
C:\Users\Admin\Downloads\ffree.exe
Filesize
221KB

MD5
a083918dbf9fe0fe4dd0e4aa553d678f

SHA1
4bf49c54b4d002af3e6d1427a8fe53ba5db7b003

SHA256
aae9a7e95acbbe7ab48ee0d732f2d15866f7794cd7d6415eb68c57124cd40b27

SHA512
17f2fd252b7227557c23bde35f2709dea27f5552b733459d022db99f340fea3151f715dbff5e456ab4d52489f32c9a7496a7576c6b9a077279ed425fae9c9cf0

Download Submit
C:\Users\Admin\Downloads\ffree.exe.2dtti2g.partial
Filesize
221KB

MD5
a083918dbf9fe0fe4dd0e4aa553d678f

SHA1
4bf49c54b4d002af3e6d1427a8fe53ba5db7b003

SHA256
aae9a7e95acbbe7ab48ee0d732f2d15866f7794cd7d6415eb68c57124cd40b27

SHA512
17f2fd252b7227557c23bde35f2709dea27f5552b733459d022db99f340fea3151f715dbff5e456ab4d52489f32c9a7496a7576c6b9a077279ed425fae9c9cf0

Download Submit