Analysis
-
max time kernel
189s -
max time network
275s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
09-04-2024 21:00
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
trabajo escuela.exe
Resource
win7-20240221-en
windows7-x64
19 signatures
300 seconds
Behavioral task
behavioral2
Sample
trabajo escuela.exe
Resource
win10-20240404-en
windows10-1703-x64
26 signatures
300 seconds
Behavioral task
behavioral3
Sample
trabajo escuela.exe
Resource
win10v2004-20240226-en
windows10-2004-x64
22 signatures
300 seconds
Behavioral task
behavioral4
Sample
trabajo escuela.exe
Resource
win11-20240221-en
windows11-21h2-x64
21 signatures
300 seconds
General
-
Target
trabajo escuela.exe
-
Size
614KB
-
MD5
535994874b99eea69b30569bc7176440
-
SHA1
e10245fd72b3ff5f219b18fb292fb3b33ae3a3e5
-
SHA256
79c0f9223e6861b8bf5f6f3ef860bc517e8fcb544efee34bb5f2cc9867af75a7
-
SHA512
12bb6e3737f545ecbef371e079d6764d8e35ff8f940258b430f16e07d34e214c030f6ce0518461639178209fe2da62941a1de763fc25490c0e02e8e064da596f
-
SSDEEP
12288:YctEagGmcl4gBF1BRnI6hAVebOe1qOX+t4Z3Fy0RMDbXScaTRM:ZR+cl7X1BRnI6hmebOe1qMuJXifu
Score
10/10
Malware Config
Signatures
-
Chaos
Ransomware family first seen in June 2021.
-
Chaos Ransomware 2 IoCs
resource yara_rule behavioral3/files/0x0008000000023220-12.dat family_chaos behavioral3/memory/1200-20-0x0000000000C40000-0x0000000000CEA000-memory.dmp family_chaos -
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
-
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
pid Process 5036 bcdedit.exe 2452 bcdedit.exe -
Renames multiple (208) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
-
pid Process 868 wbadmin.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation trabajo escuela.exe Key value queried \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation CRYpt0r V3.0.exe Key value queried \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\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\LEER IMPORTANTE.txt svchost.exe -
Executes dropped EXE 2 IoCs
pid Process 1200 CRYpt0r V3.0.exe 544 svchost.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
-
Drops desktop.ini file(s) 34 IoCs
description ioc Process File opened for modification F:\$RECYCLE.BIN\S-1-5-21-399997616-3400990511-967324271-1000\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\Start Menu\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\Desktop\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\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\Downloads\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\Favorites\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\Start Menu\Programs\Maintenance\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\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Searches\desktop.ini svchost.exe File opened for modification C:\Users\Public\Documents\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Documents\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\Recent\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\Public\Videos\desktop.ini svchost.exe File opened for modification C:\Users\Public\Desktop\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\Music\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\Libraries\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\System Tools\Desktop.ini svchost.exe -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4e27kbnhh.jpg" svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
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_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000 vds.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName vds.exe 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 -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 4452 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000_Classes\Local Settings svchost.exe -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 544 svchost.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 1200 CRYpt0r V3.0.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe 544 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 1200 CRYpt0r V3.0.exe Token: SeDebugPrivilege 544 svchost.exe Token: SeBackupPrivilege 2988 vssvc.exe Token: SeRestorePrivilege 2988 vssvc.exe Token: SeAuditPrivilege 2988 vssvc.exe Token: SeIncreaseQuotaPrivilege 4412 WMIC.exe Token: SeSecurityPrivilege 4412 WMIC.exe Token: SeTakeOwnershipPrivilege 4412 WMIC.exe Token: SeLoadDriverPrivilege 4412 WMIC.exe Token: SeSystemProfilePrivilege 4412 WMIC.exe Token: SeSystemtimePrivilege 4412 WMIC.exe Token: SeProfSingleProcessPrivilege 4412 WMIC.exe Token: SeIncBasePriorityPrivilege 4412 WMIC.exe Token: SeCreatePagefilePrivilege 4412 WMIC.exe Token: SeBackupPrivilege 4412 WMIC.exe Token: SeRestorePrivilege 4412 WMIC.exe Token: SeShutdownPrivilege 4412 WMIC.exe Token: SeDebugPrivilege 4412 WMIC.exe Token: SeSystemEnvironmentPrivilege 4412 WMIC.exe Token: SeRemoteShutdownPrivilege 4412 WMIC.exe Token: SeUndockPrivilege 4412 WMIC.exe Token: SeManageVolumePrivilege 4412 WMIC.exe Token: 33 4412 WMIC.exe Token: 34 4412 WMIC.exe Token: 35 4412 WMIC.exe Token: 36 4412 WMIC.exe Token: SeIncreaseQuotaPrivilege 4412 WMIC.exe Token: SeSecurityPrivilege 4412 WMIC.exe Token: SeTakeOwnershipPrivilege 4412 WMIC.exe Token: SeLoadDriverPrivilege 4412 WMIC.exe Token: SeSystemProfilePrivilege 4412 WMIC.exe Token: SeSystemtimePrivilege 4412 WMIC.exe Token: SeProfSingleProcessPrivilege 4412 WMIC.exe Token: SeIncBasePriorityPrivilege 4412 WMIC.exe Token: SeCreatePagefilePrivilege 4412 WMIC.exe Token: SeBackupPrivilege 4412 WMIC.exe Token: SeRestorePrivilege 4412 WMIC.exe Token: SeShutdownPrivilege 4412 WMIC.exe Token: SeDebugPrivilege 4412 WMIC.exe Token: SeSystemEnvironmentPrivilege 4412 WMIC.exe Token: SeRemoteShutdownPrivilege 4412 WMIC.exe Token: SeUndockPrivilege 4412 WMIC.exe Token: SeManageVolumePrivilege 4412 WMIC.exe Token: 33 4412 WMIC.exe Token: 34 4412 WMIC.exe Token: 35 4412 WMIC.exe Token: 36 4412 WMIC.exe Token: SeBackupPrivilege 3932 wbengine.exe Token: SeRestorePrivilege 3932 wbengine.exe Token: SeSecurityPrivilege 3932 wbengine.exe -
Suspicious use of WriteProcessMemory 22 IoCs
description pid Process procid_target PID 940 wrote to memory of 1200 940 trabajo escuela.exe 85 PID 940 wrote to memory of 1200 940 trabajo escuela.exe 85 PID 1200 wrote to memory of 544 1200 CRYpt0r V3.0.exe 93 PID 1200 wrote to memory of 544 1200 CRYpt0r V3.0.exe 93 PID 544 wrote to memory of 1052 544 svchost.exe 97 PID 544 wrote to memory of 1052 544 svchost.exe 97 PID 1052 wrote to memory of 4452 1052 cmd.exe 99 PID 1052 wrote to memory of 4452 1052 cmd.exe 99 PID 1052 wrote to memory of 4412 1052 cmd.exe 102 PID 1052 wrote to memory of 4412 1052 cmd.exe 102 PID 544 wrote to memory of 1932 544 svchost.exe 103 PID 544 wrote to memory of 1932 544 svchost.exe 103 PID 1932 wrote to memory of 5036 1932 cmd.exe 105 PID 1932 wrote to memory of 5036 1932 cmd.exe 105 PID 1932 wrote to memory of 2452 1932 cmd.exe 106 PID 1932 wrote to memory of 2452 1932 cmd.exe 106 PID 544 wrote to memory of 4992 544 svchost.exe 107 PID 544 wrote to memory of 4992 544 svchost.exe 107 PID 4992 wrote to memory of 868 4992 cmd.exe 109 PID 4992 wrote to memory of 868 4992 cmd.exe 109 PID 544 wrote to memory of 4860 544 svchost.exe 114 PID 544 wrote to memory of 4860 544 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.
-
Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
-
C:\Users\Admin\AppData\Local\Temp\trabajo escuela.exe"C:\Users\Admin\AppData\Local\Temp\trabajo escuela.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:940 -
C:\Users\Admin\AppData\Local\Temp\CRYpt0r V3.0.exe"C:\Users\Admin\AppData\Local\Temp\CRYpt0r V3.0.exe"2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1200 -
C:\Users\Admin\AppData\Roaming\svchost.exe"C:\Users\Admin\AppData\Roaming\svchost.exe"3⤵
- 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:544 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete4⤵
- Suspicious use of WriteProcessMemory
PID:1052 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet5⤵
- Interacts with shadow copies
PID:4452
-
-
C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete5⤵
- Suspicious use of AdjustPrivilegeToken
PID:4412
-
-
-
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no4⤵
- Suspicious use of WriteProcessMemory
PID:1932 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures5⤵
- Modifies boot configuration data using bcdedit
PID:5036
-
-
C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no5⤵
- Modifies boot configuration data using bcdedit
PID:2452
-
-
-
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet4⤵
- Suspicious use of WriteProcessMemory
PID:4992 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet5⤵
- Deletes backup catalog
PID:868
-
-
-
C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\LEER IMPORTANTE.txt4⤵PID:4860
-
-
-
-
C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2988
-
C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:3932
-
C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:1692
-
C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:1696
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
-
Filesize
652KB
MD5f04e2d871aac9bca6b4cbb87a7c4b583
SHA117d06a123d289510e9bbeb9d2ec89da4caa8f9d5
SHA25624761b824fa4baf33ef574f1fff99a72ab5b7e2272aecf365d39b65748b01f6d
SHA512c6624289766aeb87d9a3387130c3afc9c1ddb8f6d1ccc789f14af2d7858303629c1ac75fc89eeceb3069d0e94a0a9242c4ce705f3ec846e8f5be2566f095074a
-
Filesize
1KB
MD5c330fe6230777cc10704e18bc35f4b5a
SHA103003156eefe7b2224afc900d58e15ac62f43fea
SHA256fc668aa6ea357639d9cf3320018dededde311a70b8d12932907dfa0416c4dc14
SHA512bd719db8e6e73f8c7feae0fb1b5b4592c789468f34aa7dfb7ce603e2c2fe3f43542687c533fb542e8f6fbf652ab5d8e818f91049d93343971038f648ddb5bc10