Analysis
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max time kernel
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max time network
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platform
windows10-2004_x64 -
resource
win10v2004-20250314-en -
resource tags
arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system -
submitted
22/03/2025, 18:02
Behavioral task
behavioral1
Sample
stub.exe
Resource
win7-20241010-en
Behavioral task
behavioral2
Sample
stub.exe
Resource
win10v2004-20250314-en
General
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Target
stub.exe
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Size
22KB
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MD5
8b75fae87885a0b1a0c3c2b601d6e399
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SHA1
120224bd569c681c4cbdf879f341145081bd9317
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SHA256
a00428527fb92182aa0fce541e09b4d7dcb19b00af756f5e15c2dc7c6747bf93
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SHA512
6719ae41b3918ba58a036e57720303f2b864797b77863834de14451bf8b524c6138e3ab74237258b2a32b8d04498debcda593adbcf418565e714f0506dd5f3c9
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SSDEEP
384:13MLWHn3kIkfMU9asv1zpd8R4+CTJJr91Cz7bSbeS:Fn3kInqLvFp64+6Jr9i7baeS
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 behavioral2/memory/5760-1-0x0000000000EC0000-0x0000000000ECC000-memory.dmp family_chaos behavioral2/files/0x000d000000024080-6.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 5496 bcdedit.exe 3992 bcdedit.exe -
pid Process 3552 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-1-5-21-3920955164-3782810283-1225622749-1000\Control Panel\International\Geo\Nation stub.exe Key value queried \REGISTRY\USER\S-1-5-21-3920955164-3782810283-1225622749-1000\Control Panel\International\Geo\Nation stub.exe -
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 stub.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt stub.exe File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\stub.url stub.exe -
Executes dropped EXE 1 IoCs
pid Process 4636 stub.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\Pictures\desktop.ini stub.exe File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini stub.exe File opened for modification C:\Users\Public\Pictures\desktop.ini stub.exe File opened for modification C:\Users\Admin\Downloads\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini stub.exe File opened for modification C:\Users\Admin\OneDrive\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini stub.exe File opened for modification C:\Users\Public\Desktop\desktop.ini stub.exe File opened for modification C:\Users\Admin\Desktop\desktop.ini stub.exe File opened for modification C:\Users\Admin\Links\desktop.ini stub.exe File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini stub.exe File opened for modification C:\Users\Admin\Favorites\desktop.ini stub.exe File opened for modification C:\Users\Admin\Videos\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini stub.exe File opened for modification C:\Users\Public\Documents\desktop.ini stub.exe File opened for modification C:\Users\Public\Videos\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini stub.exe File opened for modification C:\Users\Admin\Contacts\desktop.ini stub.exe File opened for modification C:\Users\Admin\Searches\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini stub.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3920955164-3782810283-1225622749-1000\desktop.ini stub.exe File opened for modification C:\Users\Admin\Documents\desktop.ini stub.exe File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini stub.exe File opened for modification C:\Users\Admin\Saved Games\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini stub.exe File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini stub.exe File opened for modification C:\Users\Admin\Music\desktop.ini stub.exe File opened for modification C:\Users\Public\Music\desktop.ini stub.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 4992 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3920955164-3782810283-1225622749-1000_Classes\Local Settings stub.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 3136 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4636 stub.exe -
Suspicious behavior: EnumeratesProcesses 55 IoCs
pid Process 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 5760 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe 4636 stub.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 5760 stub.exe Token: SeDebugPrivilege 4636 stub.exe Token: SeBackupPrivilege 4780 vssvc.exe Token: SeRestorePrivilege 4780 vssvc.exe Token: SeAuditPrivilege 4780 vssvc.exe Token: SeIncreaseQuotaPrivilege 4784 WMIC.exe Token: SeSecurityPrivilege 4784 WMIC.exe Token: SeTakeOwnershipPrivilege 4784 WMIC.exe Token: SeLoadDriverPrivilege 4784 WMIC.exe Token: SeSystemProfilePrivilege 4784 WMIC.exe Token: SeSystemtimePrivilege 4784 WMIC.exe Token: SeProfSingleProcessPrivilege 4784 WMIC.exe Token: SeIncBasePriorityPrivilege 4784 WMIC.exe Token: SeCreatePagefilePrivilege 4784 WMIC.exe Token: SeBackupPrivilege 4784 WMIC.exe Token: SeRestorePrivilege 4784 WMIC.exe Token: SeShutdownPrivilege 4784 WMIC.exe Token: SeDebugPrivilege 4784 WMIC.exe Token: SeSystemEnvironmentPrivilege 4784 WMIC.exe Token: SeRemoteShutdownPrivilege 4784 WMIC.exe Token: SeUndockPrivilege 4784 WMIC.exe Token: SeManageVolumePrivilege 4784 WMIC.exe Token: 33 4784 WMIC.exe Token: 34 4784 WMIC.exe Token: 35 4784 WMIC.exe Token: 36 4784 WMIC.exe Token: SeIncreaseQuotaPrivilege 4784 WMIC.exe Token: SeSecurityPrivilege 4784 WMIC.exe Token: SeTakeOwnershipPrivilege 4784 WMIC.exe Token: SeLoadDriverPrivilege 4784 WMIC.exe Token: SeSystemProfilePrivilege 4784 WMIC.exe Token: SeSystemtimePrivilege 4784 WMIC.exe Token: SeProfSingleProcessPrivilege 4784 WMIC.exe Token: SeIncBasePriorityPrivilege 4784 WMIC.exe Token: SeCreatePagefilePrivilege 4784 WMIC.exe Token: SeBackupPrivilege 4784 WMIC.exe Token: SeRestorePrivilege 4784 WMIC.exe Token: SeShutdownPrivilege 4784 WMIC.exe Token: SeDebugPrivilege 4784 WMIC.exe Token: SeSystemEnvironmentPrivilege 4784 WMIC.exe Token: SeRemoteShutdownPrivilege 4784 WMIC.exe Token: SeUndockPrivilege 4784 WMIC.exe Token: SeManageVolumePrivilege 4784 WMIC.exe Token: 33 4784 WMIC.exe Token: 34 4784 WMIC.exe Token: 35 4784 WMIC.exe Token: 36 4784 WMIC.exe Token: SeBackupPrivilege 5824 wbengine.exe Token: SeRestorePrivilege 5824 wbengine.exe Token: SeSecurityPrivilege 5824 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 5760 wrote to memory of 4636 5760 stub.exe 90 PID 5760 wrote to memory of 4636 5760 stub.exe 90 PID 4636 wrote to memory of 4840 4636 stub.exe 91 PID 4636 wrote to memory of 4840 4636 stub.exe 91 PID 4840 wrote to memory of 4992 4840 cmd.exe 93 PID 4840 wrote to memory of 4992 4840 cmd.exe 93 PID 4840 wrote to memory of 4784 4840 cmd.exe 96 PID 4840 wrote to memory of 4784 4840 cmd.exe 96 PID 4636 wrote to memory of 3216 4636 stub.exe 98 PID 4636 wrote to memory of 3216 4636 stub.exe 98 PID 3216 wrote to memory of 5496 3216 cmd.exe 100 PID 3216 wrote to memory of 5496 3216 cmd.exe 100 PID 3216 wrote to memory of 3992 3216 cmd.exe 101 PID 3216 wrote to memory of 3992 3216 cmd.exe 101 PID 4636 wrote to memory of 5508 4636 stub.exe 102 PID 4636 wrote to memory of 5508 4636 stub.exe 102 PID 5508 wrote to memory of 3552 5508 cmd.exe 104 PID 5508 wrote to memory of 3552 5508 cmd.exe 104 PID 4636 wrote to memory of 3136 4636 stub.exe 108 PID 4636 wrote to memory of 3136 4636 stub.exe 108 -
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\stub.exe"C:\Users\Admin\AppData\Local\Temp\stub.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5760 -
C:\Users\Admin\AppData\Roaming\stub.exe"C:\Users\Admin\AppData\Roaming\stub.exe"2⤵
- Checks computer location settings
- Drops startup file
- Executes dropped EXE
- Drops desktop.ini file(s)
- Modifies registry class
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4636 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4840 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:4992
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4784
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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:3216 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:5496
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:3992
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:5508 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:3552
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt3⤵
- Opens file in notepad (likely ransom note)
PID:3136
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:4780
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5824
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:2672
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:920
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
226B
MD528d7fcc2b910da5e67ebb99451a5f598
SHA1a5bf77a53eda1208f4f37d09d82da0b9915a6747
SHA2562391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c
SHA5122d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6
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Filesize
22KB
MD58b75fae87885a0b1a0c3c2b601d6e399
SHA1120224bd569c681c4cbdf879f341145081bd9317
SHA256a00428527fb92182aa0fce541e09b4d7dcb19b00af756f5e15c2dc7c6747bf93
SHA5126719ae41b3918ba58a036e57720303f2b864797b77863834de14451bf8b524c6138e3ab74237258b2a32b8d04498debcda593adbcf418565e714f0506dd5f3c9
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Filesize
961B
MD576cf4b4b048d3adad48300ddb890b166
SHA11099a3ea6d9b92ff9e9fb1fbcaa51b907c65f911
SHA25655cd6766a0830a3e75eac538e955baa64a2aa5c7ca56661d080919cbe87ea472
SHA5120ac5807d857cf75ed64bbcd5fcd70d98e08f6a625f774da1402c56228aa492603a578d9461e388f793d3b718d7a19a659e68bb0a043013fb3ce02d71f5b20b4b