Analysis
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max time kernel
184s -
max time network
302s -
platform
windows11-21h2_x64 -
resource
win11-20250210-en -
resource tags
arch:x64arch:x86image:win11-20250210-enlocale:en-usos:windows11-21h2-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 behavioral4/memory/916-1-0x0000000000F20000-0x0000000000F6A000-memory.dmp family_chaos behavioral4/files/0x001c00000002adbc-6.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 440 bcdedit.exe 1392 bcdedit.exe -
pid Process 2728 wbadmin.exe -
Downloads MZ/PE file 1 IoCs
flow pid Process 7 3368 Process not Found -
Drops startup file 3 IoCs
description ioc Process 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 File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 4468 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\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Pictures\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\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\Administrative Tools\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Windows\Recent\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\Accessories\Desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Music\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1003530991-2962315046-3000157291-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\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\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\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Downloads\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\AppData\Roaming\Microsoft\Windows\SendTo\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\Desktop\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\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\Windows\Libraries\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\Public\Videos\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1003530991-2962315046-3000157291-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\88to7xu8l.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 2624 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\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 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 -
Interacts with shadow copies 3 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 652 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-1003530991-2962315046-3000157291-1000_Classes\Local Settings svchost.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4468 svchost.exe -
Suspicious behavior: EnumeratesProcesses 45 IoCs
pid Process 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 916 aggresive ransomware.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe 4468 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 916 aggresive ransomware.exe Token: SeDebugPrivilege 4468 svchost.exe Token: SeBackupPrivilege 3092 vssvc.exe Token: SeRestorePrivilege 3092 vssvc.exe Token: SeAuditPrivilege 3092 vssvc.exe Token: SeIncreaseQuotaPrivilege 2556 WMIC.exe Token: SeSecurityPrivilege 2556 WMIC.exe Token: SeTakeOwnershipPrivilege 2556 WMIC.exe Token: SeLoadDriverPrivilege 2556 WMIC.exe Token: SeSystemProfilePrivilege 2556 WMIC.exe Token: SeSystemtimePrivilege 2556 WMIC.exe Token: SeProfSingleProcessPrivilege 2556 WMIC.exe Token: SeIncBasePriorityPrivilege 2556 WMIC.exe Token: SeCreatePagefilePrivilege 2556 WMIC.exe Token: SeBackupPrivilege 2556 WMIC.exe Token: SeRestorePrivilege 2556 WMIC.exe Token: SeShutdownPrivilege 2556 WMIC.exe Token: SeDebugPrivilege 2556 WMIC.exe Token: SeSystemEnvironmentPrivilege 2556 WMIC.exe Token: SeRemoteShutdownPrivilege 2556 WMIC.exe Token: SeUndockPrivilege 2556 WMIC.exe Token: SeManageVolumePrivilege 2556 WMIC.exe Token: 33 2556 WMIC.exe Token: 34 2556 WMIC.exe Token: 35 2556 WMIC.exe Token: 36 2556 WMIC.exe Token: SeIncreaseQuotaPrivilege 2556 WMIC.exe Token: SeSecurityPrivilege 2556 WMIC.exe Token: SeTakeOwnershipPrivilege 2556 WMIC.exe Token: SeLoadDriverPrivilege 2556 WMIC.exe Token: SeSystemProfilePrivilege 2556 WMIC.exe Token: SeSystemtimePrivilege 2556 WMIC.exe Token: SeProfSingleProcessPrivilege 2556 WMIC.exe Token: SeIncBasePriorityPrivilege 2556 WMIC.exe Token: SeCreatePagefilePrivilege 2556 WMIC.exe Token: SeBackupPrivilege 2556 WMIC.exe Token: SeRestorePrivilege 2556 WMIC.exe Token: SeShutdownPrivilege 2556 WMIC.exe Token: SeDebugPrivilege 2556 WMIC.exe Token: SeSystemEnvironmentPrivilege 2556 WMIC.exe Token: SeRemoteShutdownPrivilege 2556 WMIC.exe Token: SeUndockPrivilege 2556 WMIC.exe Token: SeManageVolumePrivilege 2556 WMIC.exe Token: 33 2556 WMIC.exe Token: 34 2556 WMIC.exe Token: 35 2556 WMIC.exe Token: 36 2556 WMIC.exe Token: SeBackupPrivilege 1424 wbengine.exe Token: SeRestorePrivilege 1424 wbengine.exe Token: SeSecurityPrivilege 1424 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 916 wrote to memory of 4468 916 aggresive ransomware.exe 83 PID 916 wrote to memory of 4468 916 aggresive ransomware.exe 83 PID 4468 wrote to memory of 3260 4468 svchost.exe 84 PID 4468 wrote to memory of 3260 4468 svchost.exe 84 PID 3260 wrote to memory of 652 3260 cmd.exe 86 PID 3260 wrote to memory of 652 3260 cmd.exe 86 PID 3260 wrote to memory of 2556 3260 cmd.exe 89 PID 3260 wrote to memory of 2556 3260 cmd.exe 89 PID 4468 wrote to memory of 2072 4468 svchost.exe 91 PID 4468 wrote to memory of 2072 4468 svchost.exe 91 PID 2072 wrote to memory of 440 2072 cmd.exe 93 PID 2072 wrote to memory of 440 2072 cmd.exe 93 PID 2072 wrote to memory of 1392 2072 cmd.exe 94 PID 2072 wrote to memory of 1392 2072 cmd.exe 94 PID 4468 wrote to memory of 4680 4468 svchost.exe 95 PID 4468 wrote to memory of 4680 4468 svchost.exe 95 PID 4680 wrote to memory of 2728 4680 cmd.exe 97 PID 4680 wrote to memory of 2728 4680 cmd.exe 97 PID 4468 wrote to memory of 636 4468 svchost.exe 102 PID 4468 wrote to memory of 636 4468 svchost.exe 102 -
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⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:916 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.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:4468 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:3260 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:652
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:2556
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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:2072 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:440
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:1392
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:4680 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:2728
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read me .txt3⤵PID:636
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3092
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1424
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:3256
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:3980
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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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-PG9lbSBwcm9kdWN0X21hbnVmYWN0dXJlcj0iIiBwcm9kdWN0X25hbWU9IiIvPjxleHAgZXRhZz0iJnF1b3Q7RSt4YkF6Nlk2c1UxMjg5YlM2cWw0VlJMYmtqZkJVR1RNSnNqckhyNDRpST0mcXVvdDsiLz48YXBwIGFwcGlkPSJ7OEE2OUQzNDUtRDU2NC00NjNjLUFGRjEtQTY5RDlFNTMwRjk2fSIgdmVyc2lvbj0iMTIzLjAuNjMxMi4xMjMiIG5leHR2ZXJzaW9uPSIiIGxhbmc9ImVuIiBicmFuZD0iR0dMUyIgY2xpZW50PSIiIGluc3RhbGxhZ2U9IjAiIGluc3RhbGxkYXRldGltZT0iMTczOTE4NDcxMiIgb29iZV9pbnN0YWxsX3RpbWU9IjEzMzgzNjU1NjY2MDQzMDAwMCI-PGV2ZW50IGV2ZW50dHlwZT0iMzEiIGV2ZW50cmVzdWx0PSIxIiBlcnJvcmNvZGU9IjAiIGV4dHJhY29kZTE9IjIxNzk4NjIiIHN5c3RlbV91cHRpbWVfdGlja3M9IjUzMjQ1MjEyNzciLz48L2FwcD48L3JlcXVlc3Q-1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:2624
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