Analysis
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max time kernel
128s -
max time network
144s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
19-12-2024 13:02
Behavioral task
behavioral1
Sample
SynthMultiTool.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
SynthMultiTool.exe
Resource
win10v2004-20241007-en
General
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Target
SynthMultiTool.exe
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Size
373KB
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MD5
db00217024581a4e0b46c11ab62bb7e6
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SHA1
54be254f9978ad728c1a8f7364cc527c4c4348a0
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SHA256
b970ee2d59035562b4594e6cac64255f38dc9708a8119b7f0d44af8c9ae81b78
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SHA512
167e50bdc4d0e854dd261670b64a96ae31e5fb33738363cee1a40cfae349794ceca67ebd462f02e166cec01e149da785af3af33433f162ea7a1d13ae75dab2c3
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SSDEEP
6144:Dr96+4vlljqensRnj9tZ1PiO3/UYwZJYX8CWooc/C5qhXK:xQlleensRn5b1PiO8YwZJYXkoocqqhXK
Malware Config
Extracted
C:\Users\Admin\Documents\NOTE FROM THE HACKERS.txt
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
resource yara_rule behavioral2/memory/624-1-0x0000000000240000-0x00000000002A4000-memory.dmp family_chaos behavioral2/files/0x0008000000023bcc-7.dat family_chaos -
Chaos family
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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 2172 bcdedit.exe 1448 bcdedit.exe -
Renames multiple (235) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 4376 wbadmin.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation SynthMultiTool.exe Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation svchost.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini svchost.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\NOTE FROM THE HACKERS.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 2788 svchost.exe -
Reads user/profile data of web browsers 3 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\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3442511616-637977696-3186306149-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\b9p9xyl1s.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 4784 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000_Classes\Local Settings svchost.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 2788 svchost.exe -
Suspicious behavior: EnumeratesProcesses 49 IoCs
pid Process 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 624 SynthMultiTool.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe 2788 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 624 SynthMultiTool.exe Token: SeDebugPrivilege 2788 svchost.exe Token: SeBackupPrivilege 4772 vssvc.exe Token: SeRestorePrivilege 4772 vssvc.exe Token: SeAuditPrivilege 4772 vssvc.exe Token: SeIncreaseQuotaPrivilege 2504 WMIC.exe Token: SeSecurityPrivilege 2504 WMIC.exe Token: SeTakeOwnershipPrivilege 2504 WMIC.exe Token: SeLoadDriverPrivilege 2504 WMIC.exe Token: SeSystemProfilePrivilege 2504 WMIC.exe Token: SeSystemtimePrivilege 2504 WMIC.exe Token: SeProfSingleProcessPrivilege 2504 WMIC.exe Token: SeIncBasePriorityPrivilege 2504 WMIC.exe Token: SeCreatePagefilePrivilege 2504 WMIC.exe Token: SeBackupPrivilege 2504 WMIC.exe Token: SeRestorePrivilege 2504 WMIC.exe Token: SeShutdownPrivilege 2504 WMIC.exe Token: SeDebugPrivilege 2504 WMIC.exe Token: SeSystemEnvironmentPrivilege 2504 WMIC.exe Token: SeRemoteShutdownPrivilege 2504 WMIC.exe Token: SeUndockPrivilege 2504 WMIC.exe Token: SeManageVolumePrivilege 2504 WMIC.exe Token: 33 2504 WMIC.exe Token: 34 2504 WMIC.exe Token: 35 2504 WMIC.exe Token: 36 2504 WMIC.exe Token: SeIncreaseQuotaPrivilege 2504 WMIC.exe Token: SeSecurityPrivilege 2504 WMIC.exe Token: SeTakeOwnershipPrivilege 2504 WMIC.exe Token: SeLoadDriverPrivilege 2504 WMIC.exe Token: SeSystemProfilePrivilege 2504 WMIC.exe Token: SeSystemtimePrivilege 2504 WMIC.exe Token: SeProfSingleProcessPrivilege 2504 WMIC.exe Token: SeIncBasePriorityPrivilege 2504 WMIC.exe Token: SeCreatePagefilePrivilege 2504 WMIC.exe Token: SeBackupPrivilege 2504 WMIC.exe Token: SeRestorePrivilege 2504 WMIC.exe Token: SeShutdownPrivilege 2504 WMIC.exe Token: SeDebugPrivilege 2504 WMIC.exe Token: SeSystemEnvironmentPrivilege 2504 WMIC.exe Token: SeRemoteShutdownPrivilege 2504 WMIC.exe Token: SeUndockPrivilege 2504 WMIC.exe Token: SeManageVolumePrivilege 2504 WMIC.exe Token: 33 2504 WMIC.exe Token: 34 2504 WMIC.exe Token: 35 2504 WMIC.exe Token: 36 2504 WMIC.exe Token: SeBackupPrivilege 1888 wbengine.exe Token: SeRestorePrivilege 1888 wbengine.exe Token: SeSecurityPrivilege 1888 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 624 wrote to memory of 2788 624 SynthMultiTool.exe 86 PID 624 wrote to memory of 2788 624 SynthMultiTool.exe 86 PID 2788 wrote to memory of 536 2788 svchost.exe 91 PID 2788 wrote to memory of 536 2788 svchost.exe 91 PID 536 wrote to memory of 4784 536 cmd.exe 93 PID 536 wrote to memory of 4784 536 cmd.exe 93 PID 536 wrote to memory of 2504 536 cmd.exe 96 PID 536 wrote to memory of 2504 536 cmd.exe 96 PID 2788 wrote to memory of 2028 2788 svchost.exe 97 PID 2788 wrote to memory of 2028 2788 svchost.exe 97 PID 2028 wrote to memory of 2172 2028 cmd.exe 99 PID 2028 wrote to memory of 2172 2028 cmd.exe 99 PID 2028 wrote to memory of 1448 2028 cmd.exe 100 PID 2028 wrote to memory of 1448 2028 cmd.exe 100 PID 2788 wrote to memory of 1472 2788 svchost.exe 101 PID 2788 wrote to memory of 1472 2788 svchost.exe 101 PID 1472 wrote to memory of 4376 1472 cmd.exe 103 PID 1472 wrote to memory of 4376 1472 cmd.exe 103 PID 2788 wrote to memory of 1948 2788 svchost.exe 107 PID 2788 wrote to memory of 1948 2788 svchost.exe 107 -
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\SynthMultiTool.exe"C:\Users\Admin\AppData\Local\Temp\SynthMultiTool.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:624 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"2⤵
- Checks computer location settings
- 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:2788 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:536 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4784
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2504
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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:2028 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:2172
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1448
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:1472 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4376
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\NOTE FROM THE HACKERS.txt3⤵PID:1948
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4772
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1888
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1624
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1788
Network
MITRE ATT&CK Enterprise v15
Defense Evasion
Direct Volume Access
1Indicator Removal
3File Deletion
3Modify Registry
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
373KB
MD5db00217024581a4e0b46c11ab62bb7e6
SHA154be254f9978ad728c1a8f7364cc527c4c4348a0
SHA256b970ee2d59035562b4594e6cac64255f38dc9708a8119b7f0d44af8c9ae81b78
SHA512167e50bdc4d0e854dd261670b64a96ae31e5fb33738363cee1a40cfae349794ceca67ebd462f02e166cec01e149da785af3af33433f162ea7a1d13ae75dab2c3
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Filesize
1KB
MD514bd3821f7209ff491eb29364af87894
SHA1ee920726dd84973c486a107592964ec5a01150d0
SHA256e47e5f8f7bb3ece6e9dcc05df902667fa64077ea760eceae3c669de7ea8b4aac
SHA5126895f1e3143a119bc29ac961539a4d14701ffdf6d4ba50da4a36be55c81259b5ca3c2948d8cf996475f121aef4bb4675d43b59c0f74405b41c3141a3f43fc03a