Analysis
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max time kernel
188s -
max time network
300s -
platform
windows10-ltsc 2021_x64 -
resource
win10ltsc2021-20250207-en -
resource tags
arch:x64arch:x86image:win10ltsc2021-20250207-enlocale:en-usos:windows10-ltsc 2021-x64system -
submitted
10-02-2025 22:09
Behavioral task
behavioral1
Sample
aggresive ransomware.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
aggresive ransomware.exe
Resource
win10v2004-20250207-en
Behavioral task
behavioral3
Sample
aggresive ransomware.exe
Resource
win10ltsc2021-20250207-en
Behavioral task
behavioral4
Sample
aggresive ransomware.exe
Resource
win11-20250210-en
General
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Target
aggresive ransomware.exe
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Size
274KB
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MD5
a1312968ec68e2fd87b0a4652dba511a
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SHA1
153e3ae7cc6d8d38ca8d1ef805b51f90dcdc53e1
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SHA256
773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0
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SHA512
b65191bf7b8e6aa165ed9c37189fd5b13c3f6a5803b01de0329ea8898078bcb8a1d5cd821a8f60951ba18bfd87a2f380867c1a8b1b1ec89129239b7057f2d623
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SSDEEP
6144:gr9i0ME2RQVQW4cGl8yK7dJ+/UIPzHgv26UT8:e92RQVQW4cGl8y2T+/BPzAv26UT8
Malware Config
Signatures
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Chaos
Ransomware family first seen in June 2021.
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Chaos Ransomware 2 IoCs
resource yara_rule behavioral3/memory/4256-1-0x00000000005D0000-0x000000000061A000-memory.dmp family_chaos behavioral3/files/0x0008000000027f39-2.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 3388 bcdedit.exe 4136 bcdedit.exe -
pid Process 4052 wbadmin.exe -
Downloads MZ/PE file 1 IoCs
flow pid Process 19 3740 Process not Found -
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-1-5-21-3793211311-3630375320-1682890903-1000\Control Panel\International\Geo\Nation aggresive ransomware.exe Key value queried \REGISTRY\USER\S-1-5-21-3793211311-3630375320-1682890903-1000\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\read me .txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4724 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) 31 IoCs
description ioc Process File opened for modification C:\Users\Public\Desktop\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\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\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\Start Menu\Programs\Accessories\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\Admin\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\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\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3793211311-3630375320-1682890903-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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 C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\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\Libraries\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\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\desktop.ini svchost.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3793211311-3630375320-1682890903-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ypgdh2mt9.jpg" svchost.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 1 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 MicrosoftEdgeUpdate.exe -
System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs
Adversaries may check for Internet connectivity on compromised systems.
pid Process 2036 MicrosoftEdgeUpdate.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 1704 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3793211311-3630375320-1682890903-1000_Classes\Local Settings svchost.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4724 svchost.exe -
Suspicious behavior: EnumeratesProcesses 45 IoCs
pid Process 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4256 aggresive ransomware.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4724 svchost.exe 4860 WMIC.exe 4860 WMIC.exe 4860 WMIC.exe 4860 WMIC.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 4256 aggresive ransomware.exe Token: SeDebugPrivilege 4724 svchost.exe Token: SeBackupPrivilege 5012 vssvc.exe Token: SeRestorePrivilege 5012 vssvc.exe Token: SeAuditPrivilege 5012 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 1220 wbengine.exe Token: SeRestorePrivilege 1220 wbengine.exe Token: SeSecurityPrivilege 1220 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 4256 wrote to memory of 4724 4256 aggresive ransomware.exe 84 PID 4256 wrote to memory of 4724 4256 aggresive ransomware.exe 84 PID 4724 wrote to memory of 2056 4724 svchost.exe 85 PID 4724 wrote to memory of 2056 4724 svchost.exe 85 PID 2056 wrote to memory of 1704 2056 cmd.exe 87 PID 2056 wrote to memory of 1704 2056 cmd.exe 87 PID 2056 wrote to memory of 4860 2056 cmd.exe 90 PID 2056 wrote to memory of 4860 2056 cmd.exe 90 PID 4724 wrote to memory of 4496 4724 svchost.exe 92 PID 4724 wrote to memory of 4496 4724 svchost.exe 92 PID 4496 wrote to memory of 3388 4496 cmd.exe 94 PID 4496 wrote to memory of 3388 4496 cmd.exe 94 PID 4496 wrote to memory of 4136 4496 cmd.exe 95 PID 4496 wrote to memory of 4136 4496 cmd.exe 95 PID 4724 wrote to memory of 2152 4724 svchost.exe 96 PID 4724 wrote to memory of 2152 4724 svchost.exe 96 PID 2152 wrote to memory of 4052 2152 cmd.exe 98 PID 2152 wrote to memory of 4052 2152 cmd.exe 98 PID 4724 wrote to memory of 2764 4724 svchost.exe 103 PID 4724 wrote to memory of 2764 4724 svchost.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.
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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\aggresive ransomware.exe"C:\Users\Admin\AppData\Local\Temp\aggresive ransomware.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4256 -
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:4724 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:2056 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1704
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious behavior: EnumeratesProcesses
- 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:4496 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3388
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:4136
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2152 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:4052
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read me .txt3⤵PID:2764
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5012
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1220
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3288
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1612
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C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-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⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:2036
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
274KB
MD5a1312968ec68e2fd87b0a4652dba511a
SHA1153e3ae7cc6d8d38ca8d1ef805b51f90dcdc53e1
SHA256773b5fc4a8f79c7d1fdc9e2c79cf92f67257292da3ab4c6f5551f3308fa84fa0
SHA512b65191bf7b8e6aa165ed9c37189fd5b13c3f6a5803b01de0329ea8898078bcb8a1d5cd821a8f60951ba18bfd87a2f380867c1a8b1b1ec89129239b7057f2d623
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Filesize
102B
MD58e826995a13a95c73983e901afdf3597
SHA18b79ca70e0ff0ff3ac538c9d55279760f6656bfa
SHA256b0a0c6c1adaa391936d55042d9904caa366d28d491823338be19cef580f5820d
SHA512bc4ba9229c8a34660db17ff0acd0bac06c587f4ad1c399f06748a3357d21b763bbdeec1792e7f36766c0ee043abd018f76319659fb0c5b40de82e834548d333b