Analysis
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max time kernel
147s -
max time network
151s -
platform
windows11-21h2_x64 -
resource
win11-20240802-en -
resource tags
arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system -
submitted
08-08-2024 18:03
Behavioral task
behavioral1
Sample
FridayBoycrazyV2.exe
Resource
win11-20240802-en
General
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Target
FridayBoycrazyV2.exe
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Size
280KB
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MD5
41e34a8240026b4e9cd8d81a73ee8b2c
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SHA1
3876b12e152dd552a7059538242b6f87a23e60f5
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SHA256
0ef2768bdfaa0b953a5c498f18bbf2df5dce249eaf2044474c476c4367c535b5
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SHA512
a7d610ee4f116121757f47193bf092b639cf2d439dcfa364ea800c28c0f21996fd8baa31c9abe68d2c18cc8f334c57f9d71c4e444a04a27d3b9cab90eecbba73
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SSDEEP
6144:1r93iyJ7/+WZT1kRnSeXSX9MNzxiMwP2OswK:iyJ7/+Wd1kRnFX4mNzxyeOswK
Malware Config
Extracted
C:\Users\Admin\Documents\Warning.txt
https://www.roblox.com/game-pass/887175972
https://venmo.com/u/gratefulcode
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
resource yara_rule behavioral1/memory/4728-1-0x0000000000750000-0x000000000079C000-memory.dmp family_chaos behavioral1/files/0x000200000002aa9d-6.dat family_chaos -
Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 3060 bcdedit.exe 3436 bcdedit.exe -
pid Process 3000 wbadmin.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\FridayBoycrazy.url FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini FridayBoycrazy.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Warning.txt FridayBoycrazy.exe -
Executes dropped EXE 1 IoCs
pid Process 420 FridayBoycrazy.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification C:\Users\Public\Documents\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Videos\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Public\Videos\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Links\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini FridayBoycrazy.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3007475212-2160282277-2943627620-1000\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Documents\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Public\Music\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Music\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Public\Pictures\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\Searches\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini FridayBoycrazy.exe File opened for modification C:\Users\Public\Desktop\desktop.ini FridayBoycrazy.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3007475212-2160282277-2943627620-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1vph9dymy.jpg" FridayBoycrazy.exe -
Drops file in Windows directory 4 IoCs
description ioc Process File opened for modification C:\Windows\Panther\UnattendGC\diagwrn.xml UserOOBEBroker.exe File opened for modification C:\Windows\Panther\UnattendGC\setupact.log UserOOBEBroker.exe File opened for modification C:\Windows\Panther\UnattendGC\setuperr.log UserOOBEBroker.exe File opened for modification C:\Windows\Panther\UnattendGC\diagerr.xml UserOOBEBroker.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language FileCoAuth.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language DllHost.exe -
Checks SCSI registry key(s) 3 TTPs 4 IoCs
SCSI information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName vds.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 4812 vssadmin.exe -
Modifies registry class 2 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3007475212-2160282277-2943627620-1000_Classes\Local Settings FridayBoycrazy.exe Key created \REGISTRY\USER\S-1-5-21-3007475212-2160282277-2943627620-1000_Classes\Local Settings\MuiCache MiniSearchHost.exe -
Opens file in notepad (likely ransom note) 2 IoCs
pid Process 3968 NOTEPAD.EXE 4892 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 420 FridayBoycrazy.exe -
Suspicious behavior: EnumeratesProcesses 41 IoCs
pid Process 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 4728 FridayBoycrazyV2.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe 420 FridayBoycrazy.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4728 FridayBoycrazyV2.exe Token: SeDebugPrivilege 420 FridayBoycrazy.exe Token: SeBackupPrivilege 1460 vssvc.exe Token: SeRestorePrivilege 1460 vssvc.exe Token: SeAuditPrivilege 1460 vssvc.exe Token: SeIncreaseQuotaPrivilege 4860 WMIC.exe Token: SeSecurityPrivilege 4860 WMIC.exe Token: SeTakeOwnershipPrivilege 4860 WMIC.exe Token: SeLoadDriverPrivilege 4860 WMIC.exe Token: SeSystemProfilePrivilege 4860 WMIC.exe Token: SeSystemtimePrivilege 4860 WMIC.exe Token: SeProfSingleProcessPrivilege 4860 WMIC.exe Token: SeIncBasePriorityPrivilege 4860 WMIC.exe Token: SeCreatePagefilePrivilege 4860 WMIC.exe Token: SeBackupPrivilege 4860 WMIC.exe Token: SeRestorePrivilege 4860 WMIC.exe Token: SeShutdownPrivilege 4860 WMIC.exe Token: SeDebugPrivilege 4860 WMIC.exe Token: SeSystemEnvironmentPrivilege 4860 WMIC.exe Token: SeRemoteShutdownPrivilege 4860 WMIC.exe Token: SeUndockPrivilege 4860 WMIC.exe Token: SeManageVolumePrivilege 4860 WMIC.exe Token: 33 4860 WMIC.exe Token: 34 4860 WMIC.exe Token: 35 4860 WMIC.exe Token: 36 4860 WMIC.exe Token: SeIncreaseQuotaPrivilege 4860 WMIC.exe Token: SeSecurityPrivilege 4860 WMIC.exe Token: SeTakeOwnershipPrivilege 4860 WMIC.exe Token: SeLoadDriverPrivilege 4860 WMIC.exe Token: SeSystemProfilePrivilege 4860 WMIC.exe Token: SeSystemtimePrivilege 4860 WMIC.exe Token: SeProfSingleProcessPrivilege 4860 WMIC.exe Token: SeIncBasePriorityPrivilege 4860 WMIC.exe Token: SeCreatePagefilePrivilege 4860 WMIC.exe Token: SeBackupPrivilege 4860 WMIC.exe Token: SeRestorePrivilege 4860 WMIC.exe Token: SeShutdownPrivilege 4860 WMIC.exe Token: SeDebugPrivilege 4860 WMIC.exe Token: SeSystemEnvironmentPrivilege 4860 WMIC.exe Token: SeRemoteShutdownPrivilege 4860 WMIC.exe Token: SeUndockPrivilege 4860 WMIC.exe Token: SeManageVolumePrivilege 4860 WMIC.exe Token: 33 4860 WMIC.exe Token: 34 4860 WMIC.exe Token: 35 4860 WMIC.exe Token: 36 4860 WMIC.exe Token: SeBackupPrivilege 5016 wbengine.exe Token: SeRestorePrivilege 5016 wbengine.exe Token: SeSecurityPrivilege 5016 wbengine.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4472 MiniSearchHost.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4728 wrote to memory of 420 4728 FridayBoycrazyV2.exe 82 PID 4728 wrote to memory of 420 4728 FridayBoycrazyV2.exe 82 PID 420 wrote to memory of 1852 420 FridayBoycrazy.exe 84 PID 420 wrote to memory of 1852 420 FridayBoycrazy.exe 84 PID 1852 wrote to memory of 4812 1852 cmd.exe 86 PID 1852 wrote to memory of 4812 1852 cmd.exe 86 PID 1852 wrote to memory of 4860 1852 cmd.exe 89 PID 1852 wrote to memory of 4860 1852 cmd.exe 89 PID 420 wrote to memory of 3468 420 FridayBoycrazy.exe 91 PID 420 wrote to memory of 3468 420 FridayBoycrazy.exe 91 PID 3468 wrote to memory of 3060 3468 cmd.exe 93 PID 3468 wrote to memory of 3060 3468 cmd.exe 93 PID 3468 wrote to memory of 3436 3468 cmd.exe 94 PID 3468 wrote to memory of 3436 3468 cmd.exe 94 PID 420 wrote to memory of 860 420 FridayBoycrazy.exe 95 PID 420 wrote to memory of 860 420 FridayBoycrazy.exe 95 PID 860 wrote to memory of 3000 860 cmd.exe 97 PID 860 wrote to memory of 3000 860 cmd.exe 97 PID 420 wrote to memory of 3968 420 FridayBoycrazy.exe 101 PID 420 wrote to memory of 3968 420 FridayBoycrazy.exe 101 -
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.
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Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\FridayBoycrazyV2.exe"C:\Users\Admin\AppData\Local\Temp\FridayBoycrazyV2.exe"1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4728 -
C:\Users\Admin\AppData\Roaming\FridayBoycrazy.exe"C:\Users\Admin\AppData\Roaming\FridayBoycrazy.exe"2⤵
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Sets desktop wallpaper using registry
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:420 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:1852 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4812
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4860
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no3⤵
- Suspicious use of WriteProcessMemory
PID:3468 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3060
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3436
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:860 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:3000
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Warning.txt3⤵
- Opens file in notepad (likely ransom note)
PID:3968
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1460
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5016
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:5064
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:3700
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C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:4472
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc1⤵PID:1764
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C:\Windows\System32\oobe\UserOOBEBroker.exeC:\Windows\System32\oobe\UserOOBEBroker.exe -Embedding1⤵
- Drops file in Windows directory
PID:1064
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C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exeC:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding1⤵
- System Location Discovery: System Language Discovery
PID:2676
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\Warning.txt1⤵
- Opens file in notepad (likely ransom note)
PID:4892
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C:\Windows\SysWOW64\DllHost.exeC:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}1⤵
- System Location Discovery: System Language Discovery
PID:5056
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C:\Windows\system32\rundll32.exe"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,Control_RunDLL C:\Windows\System32\srchadmin.dll ,1⤵PID:4880
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
Filesize9KB
MD5cfd9cd4059c3c2fbf072af4c6213da62
SHA1a79f1bce1d4483fe318d3b936a3349ed26d4fdab
SHA25671f0c81cf3b580ef93d274fcb06d2ab2eb39d81628cbea2f75dc7c79e73d2de2
SHA512fb0657841efd4894ed12024c461f33cac4c1f49c81675e49037c9b1ed81645b978dce46733c7f02661512a698709fcfc109fd7db89bd8f9e8f9b0f3ea6ce1bb2
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Filesize
280KB
MD541e34a8240026b4e9cd8d81a73ee8b2c
SHA13876b12e152dd552a7059538242b6f87a23e60f5
SHA2560ef2768bdfaa0b953a5c498f18bbf2df5dce249eaf2044474c476c4367c535b5
SHA512a7d610ee4f116121757f47193bf092b639cf2d439dcfa364ea800c28c0f21996fd8baa31c9abe68d2c18cc8f334c57f9d71c4e444a04a27d3b9cab90eecbba73
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Filesize
642B
MD5072e26ca8a9c9502061d1c3d9e3bbeaa
SHA1fe55bffddd0d415c293e8e926d302e3586212322
SHA256f7b22500b7a82a9446b635353aceecbdc205c9208eeb72c2e2c1b6d0a9a1bd62
SHA5122bc83902a56df2a3178c3b59ad8014a08b282e60289123a10d9a4d643a604876e008e782a6c861bfd211580a5fdbb1bcf748c3197210d71dc18d8949c62d4610