Resubmissions
25/01/2024, 01:57
240125-cdn9qadge6 1024/01/2024, 15:56
240124-tdhwdadfb5 1024/01/2024, 11:55
240124-n3eblahecn 10Analysis
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max time kernel
212s -
max time network
196s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
25/01/2024, 01:57
Behavioral task
behavioral1
Sample
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe
Resource
win10v2004-20231215-en
General
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Target
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe
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Size
3.4MB
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MD5
f64a5c6fa180acaee93d4fac406c579b
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SHA1
bacf88f16fe670ef2d87df154929c51b28b12263
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SHA256
cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6
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SHA512
01687ae73126dd6540308efa140e56c5410d5971415881a3747cf961c4abcd2e9be4dcd75181f865070bfb4e296617b8e3d61f55de747407a4c459e6a2bc0197
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SSDEEP
24576:SvFnlgEsJu/SqXF3mh8uNFr95+CUNHEes4pyQquVexXCP7OigudxcAGZLqrDIjHM:QloJ0wtfSHO43ZpTLiADL
Malware Config
Extracted
C:\Users\Admin\Documents\PLS_READ_ME.txt
https://pastebin.com/raw/wZnisRDV
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/2532-0-0x0000000000DE0000-0x000000000114A000-memory.dmp family_chaos behavioral2/files/0x0002000000022775-6.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 3596 bcdedit.exe 4324 bcdedit.exe -
Renames multiple (184) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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pid Process 1368 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-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\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\PLS_READ_ME.txt svchost.exe -
Executes dropped EXE 1 IoCs
pid Process 3532 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\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\System Tools\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\Favorites\desktop.ini svchost.exe File opened for modification C:\Users\Admin\Links\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 F:\$RECYCLE.BIN\S-1-5-21-3073191680-435865314-2862784915-1000\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\Documents\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\Favorites\Links\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 C:\Users\Public\Pictures\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\Start Menu\Programs\desktop.ini svchost.exe File opened for modification C:\Users\Public\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\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\AppData\Roaming\Microsoft\Windows\SendTo\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\AccountPictures\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\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\Music\desktop.ini svchost.exe File opened for modification C:\Users\Admin\OneDrive\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 -
Sets desktop wallpaper using registry 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\t9z57ym18.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 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_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 -
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
pid Process 1768 vssadmin.exe -
Modifies registry class 1 IoCs
description ioc Process Key created \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000_Classes\Local Settings svchost.exe -
Opens file in notepad (likely ransom note) 1 IoCs
pid Process 2624 NOTEPAD.EXE -
Suspicious behavior: AddClipboardFormatListener 1 IoCs
pid Process 3532 svchost.exe -
Suspicious behavior: EnumeratesProcesses 51 IoCs
pid Process 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe 3532 svchost.exe -
Suspicious use of AdjustPrivilegeToken 50 IoCs
description pid Process Token: SeDebugPrivilege 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe Token: SeDebugPrivilege 3532 svchost.exe Token: SeBackupPrivilege 1260 vssvc.exe Token: SeRestorePrivilege 1260 vssvc.exe Token: SeAuditPrivilege 1260 vssvc.exe Token: SeIncreaseQuotaPrivilege 4104 WMIC.exe Token: SeSecurityPrivilege 4104 WMIC.exe Token: SeTakeOwnershipPrivilege 4104 WMIC.exe Token: SeLoadDriverPrivilege 4104 WMIC.exe Token: SeSystemProfilePrivilege 4104 WMIC.exe Token: SeSystemtimePrivilege 4104 WMIC.exe Token: SeProfSingleProcessPrivilege 4104 WMIC.exe Token: SeIncBasePriorityPrivilege 4104 WMIC.exe Token: SeCreatePagefilePrivilege 4104 WMIC.exe Token: SeBackupPrivilege 4104 WMIC.exe Token: SeRestorePrivilege 4104 WMIC.exe Token: SeShutdownPrivilege 4104 WMIC.exe Token: SeDebugPrivilege 4104 WMIC.exe Token: SeSystemEnvironmentPrivilege 4104 WMIC.exe Token: SeRemoteShutdownPrivilege 4104 WMIC.exe Token: SeUndockPrivilege 4104 WMIC.exe Token: SeManageVolumePrivilege 4104 WMIC.exe Token: 33 4104 WMIC.exe Token: 34 4104 WMIC.exe Token: 35 4104 WMIC.exe Token: 36 4104 WMIC.exe Token: SeIncreaseQuotaPrivilege 4104 WMIC.exe Token: SeSecurityPrivilege 4104 WMIC.exe Token: SeTakeOwnershipPrivilege 4104 WMIC.exe Token: SeLoadDriverPrivilege 4104 WMIC.exe Token: SeSystemProfilePrivilege 4104 WMIC.exe Token: SeSystemtimePrivilege 4104 WMIC.exe Token: SeProfSingleProcessPrivilege 4104 WMIC.exe Token: SeIncBasePriorityPrivilege 4104 WMIC.exe Token: SeCreatePagefilePrivilege 4104 WMIC.exe Token: SeBackupPrivilege 4104 WMIC.exe Token: SeRestorePrivilege 4104 WMIC.exe Token: SeShutdownPrivilege 4104 WMIC.exe Token: SeDebugPrivilege 4104 WMIC.exe Token: SeSystemEnvironmentPrivilege 4104 WMIC.exe Token: SeRemoteShutdownPrivilege 4104 WMIC.exe Token: SeUndockPrivilege 4104 WMIC.exe Token: SeManageVolumePrivilege 4104 WMIC.exe Token: 33 4104 WMIC.exe Token: 34 4104 WMIC.exe Token: 35 4104 WMIC.exe Token: 36 4104 WMIC.exe Token: SeBackupPrivilege 5044 wbengine.exe Token: SeRestorePrivilege 5044 wbengine.exe Token: SeSecurityPrivilege 5044 wbengine.exe -
Suspicious use of WriteProcessMemory 20 IoCs
description pid Process procid_target PID 2532 wrote to memory of 3532 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 89 PID 2532 wrote to memory of 3532 2532 cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe 89 PID 3532 wrote to memory of 4100 3532 svchost.exe 100 PID 3532 wrote to memory of 4100 3532 svchost.exe 100 PID 4100 wrote to memory of 1768 4100 cmd.exe 102 PID 4100 wrote to memory of 1768 4100 cmd.exe 102 PID 4100 wrote to memory of 4104 4100 cmd.exe 105 PID 4100 wrote to memory of 4104 4100 cmd.exe 105 PID 3532 wrote to memory of 3328 3532 svchost.exe 106 PID 3532 wrote to memory of 3328 3532 svchost.exe 106 PID 3328 wrote to memory of 3596 3328 cmd.exe 108 PID 3328 wrote to memory of 3596 3328 cmd.exe 108 PID 3328 wrote to memory of 4324 3328 cmd.exe 109 PID 3328 wrote to memory of 4324 3328 cmd.exe 109 PID 3532 wrote to memory of 2192 3532 svchost.exe 110 PID 3532 wrote to memory of 2192 3532 svchost.exe 110 PID 2192 wrote to memory of 1368 2192 cmd.exe 112 PID 2192 wrote to memory of 1368 2192 cmd.exe 112 PID 3532 wrote to memory of 2624 3532 svchost.exe 116 PID 3532 wrote to memory of 2624 3532 svchost.exe 116 -
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\cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe"C:\Users\Admin\AppData\Local\Temp\cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2532 -
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:3532 -
C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete3⤵
- Suspicious use of WriteProcessMemory
PID:4100 -
C:\Windows\system32\vssadmin.exevssadmin delete shadows /all /quiet4⤵
- Interacts with shadow copies
PID:1768
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C:\Windows\System32\Wbem\WMIC.exewmic shadowcopy delete4⤵
- Suspicious use of AdjustPrivilegeToken
PID:4104
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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:3328 -
C:\Windows\system32\bcdedit.exebcdedit /set {default} bootstatuspolicy ignoreallfailures4⤵
- Modifies boot configuration data using bcdedit
PID:3596
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C:\Windows\system32\bcdedit.exebcdedit /set {default} recoveryenabled no4⤵
- Modifies boot configuration data using bcdedit
PID:4324
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet3⤵
- Suspicious use of WriteProcessMemory
PID:2192 -
C:\Windows\system32\wbadmin.exewbadmin delete catalog -quiet4⤵
- Deletes backup catalog
PID:1368
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLS_READ_ME.txt3⤵
- Opens file in notepad (likely ransom note)
PID:2624
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1260
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C:\Windows\system32\wbengine.exe"C:\Windows\system32\wbengine.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5044
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C:\Windows\System32\vdsldr.exeC:\Windows\System32\vdsldr.exe -Embedding1⤵PID:5008
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C:\Windows\System32\vds.exeC:\Windows\System32\vds.exe1⤵
- Checks SCSI registry key(s)
PID:3616
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.4MB
MD5f64a5c6fa180acaee93d4fac406c579b
SHA1bacf88f16fe670ef2d87df154929c51b28b12263
SHA256cb7c19b49efd25a4314129c9024c8e84ad9dd8acb45658ecf43c2d1fab775ca6
SHA51201687ae73126dd6540308efa140e56c5410d5971415881a3747cf961c4abcd2e9be4dcd75181f865070bfb4e296617b8e3d61f55de747407a4c459e6a2bc0197
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Filesize
1019B
MD5bf4f42180e1f6f0dc0dc8e5863fbfdff
SHA111ebaf5dd9d926371b27c9cdb86a0b7978deb383
SHA256c22510ba329236dacd2e14be4c260eca7a8deb7433cb4291311232f37ee40bd7
SHA5126004b7d2e6a6b4035363d25cb7291dc0be0c0070a8bbadea0c4275278fb4299e3348cb5aebb5d9870ff7986bf43c59983bb3aa1680f1b27fcad8c68064c09c16