Analysis
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max time kernel
150s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
23-04-2024 02:18
Behavioral task
behavioral1
Sample
main.exe
Resource
win10v2004-20240412-en
windows10-2004-x64
22 signatures
150 seconds
General
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Target
main.exe
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Size
330KB
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MD5
3736a823e68e0624d6a97e26404912c9
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SHA1
3dc5eac263f2a10eefe1f4d16932623aabdcecc3
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SHA256
b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1
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SHA512
902955e4c95a5d8840b0ced7cfb4838b59a75f5a87ec694d426c01476c3f64974039d4f6310464777adc78d433a0dd455092db0a8d27381146351be931143cfb
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SSDEEP
6144:GB4Rr95aqSX2mLCHpdgwNNMLv6Cwm33BL5uK8v:GB4ARX2mLCJdgwNNWg8BLAK8v
Score
10/10
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 behavioral1/memory/3888-0-0x00000000007E0000-0x0000000000838000-memory.dmp family_chaos behavioral1/files/0x000800000002343d-6.dat family_chaos -
Deletes shadow copies 2 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 4176 bcdedit.exe 5052 bcdedit.exe -
pid Process 1560 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-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation svchost.exe Key value queried \REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation main.exe -
Drops startup file 3 IoCs
description ioc Process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Message.txt svchost.exe 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 -
Executes dropped EXE 1 IoCs
pid Process 4236 svchost.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\Admin\Saved Games\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\Libraries\desktop.ini svchost.exe File opened for modification C:\Users\Public\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\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\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\Administrative Tools\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\Music\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\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\Videos\desktop.ini svchost.exe File opened for modification F:\$RECYCLE.BIN\S-1-5-21-259785868-298165991-4178590326-1000\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Favorites\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\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\SendTo\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\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\Links\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\Contacts\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\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\Accessibility\desktop.ini svchost.exe File opened for modification C:\Users\Public\Pictures\desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\ohslu74u3.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_DADY&PROD_HARDDISK\4&215468A5&0&000000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\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 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 724 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 4084 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 4236 svchost.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 3888 main.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe 4236 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 3888 main.exe Token: SeDebugPrivilege 4236 svchost.exe Token: SeBackupPrivilege 2784 vssvc.exe Token: SeRestorePrivilege 2784 vssvc.exe Token: SeAuditPrivilege 2784 vssvc.exe Token: SeIncreaseQuotaPrivilege 3600 WMIC.exe Token: SeSecurityPrivilege 3600 WMIC.exe Token: SeTakeOwnershipPrivilege 3600 WMIC.exe Token: SeLoadDriverPrivilege 3600 WMIC.exe Token: SeSystemProfilePrivilege 3600 WMIC.exe Token: SeSystemtimePrivilege 3600 WMIC.exe Token: SeProfSingleProcessPrivilege 3600 WMIC.exe Token: SeIncBasePriorityPrivilege 3600 WMIC.exe Token: SeCreatePagefilePrivilege 3600 WMIC.exe Token: SeBackupPrivilege 3600 WMIC.exe Token: SeRestorePrivilege 3600 WMIC.exe Token: SeShutdownPrivilege 3600 WMIC.exe Token: SeDebugPrivilege 3600 WMIC.exe Token: SeSystemEnvironmentPrivilege 3600 WMIC.exe Token: SeRemoteShutdownPrivilege 3600 WMIC.exe Token: SeUndockPrivilege 3600 WMIC.exe Token: SeManageVolumePrivilege 3600 WMIC.exe Token: 33 3600 WMIC.exe Token: 34 3600 WMIC.exe Token: 35 3600 WMIC.exe Token: 36 3600 WMIC.exe Token: SeIncreaseQuotaPrivilege 3600 WMIC.exe Token: SeSecurityPrivilege 3600 WMIC.exe Token: SeTakeOwnershipPrivilege 3600 WMIC.exe Token: SeLoadDriverPrivilege 3600 WMIC.exe Token: SeSystemProfilePrivilege 3600 WMIC.exe Token: SeSystemtimePrivilege 3600 WMIC.exe Token: SeProfSingleProcessPrivilege 3600 WMIC.exe Token: SeIncBasePriorityPrivilege 3600 WMIC.exe Token: SeCreatePagefilePrivilege 3600 WMIC.exe Token: SeBackupPrivilege 3600 WMIC.exe Token: SeRestorePrivilege 3600 WMIC.exe Token: SeShutdownPrivilege 3600 WMIC.exe Token: SeDebugPrivilege 3600 WMIC.exe Token: SeSystemEnvironmentPrivilege 3600 WMIC.exe Token: SeRemoteShutdownPrivilege 3600 WMIC.exe Token: SeUndockPrivilege 3600 WMIC.exe Token: SeManageVolumePrivilege 3600 WMIC.exe Token: 33 3600 WMIC.exe Token: 34 3600 WMIC.exe Token: 35 3600 WMIC.exe Token: 36 3600 WMIC.exe Token: SeBackupPrivilege 552 wbengine.exe Token: SeRestorePrivilege 552 wbengine.exe Token: SeSecurityPrivilege 552 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 3888 wrote to memory of 4236 3888 main.exe 94 PID 3888 wrote to memory of 4236 3888 main.exe 94 PID 4236 wrote to memory of 4376 4236 svchost.exe 97 PID 4236 wrote to memory of 4376 4236 svchost.exe 97 PID 4376 wrote to memory of 724 4376 cmd.exe 99 PID 4376 wrote to memory of 724 4376 cmd.exe 99 PID 4376 wrote to memory of 3600 4376 cmd.exe 102 PID 4376 wrote to memory of 3600 4376 cmd.exe 102 PID 4236 wrote to memory of 3136 4236 svchost.exe 103 PID 4236 wrote to memory of 3136 4236 svchost.exe 103 PID 3136 wrote to memory of 4176 3136 cmd.exe 106 PID 3136 wrote to memory of 4176 3136 cmd.exe 106 PID 3136 wrote to memory of 5052 3136 cmd.exe 107 PID 3136 wrote to memory of 5052 3136 cmd.exe 107 PID 4236 wrote to memory of 3724 4236 svchost.exe 108 PID 4236 wrote to memory of 3724 4236 svchost.exe 108 PID 3724 wrote to memory of 1560 3724 cmd.exe 110 PID 3724 wrote to memory of 1560 3724 cmd.exe 110 PID 4236 wrote to memory of 4084 4236 svchost.exe 114 PID 4236 wrote to memory of 4084 4236 svchost.exe 114 -
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\main.exe"C:\Users\Admin\AppData\Local\Temp\main.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3888 -
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:4236 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4376 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:724
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:3600
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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:3136 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:4176
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:5052
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:3724 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1560
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\Message.txt3⤵
- Opens file in notepad (likely ransom note)
PID:4084
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2784
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:552
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:752
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1248
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
330KB
MD53736a823e68e0624d6a97e26404912c9
SHA13dc5eac263f2a10eefe1f4d16932623aabdcecc3
SHA256b7e12bf54356d831e3d7b5e10b0c1782a3e2feb29dd6ed3857c3922d2b48c7c1
SHA512902955e4c95a5d8840b0ced7cfb4838b59a75f5a87ec694d426c01476c3f64974039d4f6310464777adc78d433a0dd455092db0a8d27381146351be931143cfb
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Filesize
740B
MD5b8b46623ec2a4663bfa674b882ebccb6
SHA1108262bba5d25b970796e50c6c25c652ba8d8b59
SHA25641764b00cbe89f3a57b8124cf2ce510fcb19ec6c82c40483094da027b3ef660b
SHA5120b7727e6285dc4b4b625ef072eff93a2a9b283ec0a4e5dcdf1e465522b50fecfc1e0f3da9983ea3cd9c8372463e174526cdad263890dcd551badc2257018fea6