Malware Analysis Report

2025-04-13 21:19

Sample ID 250322-whwzxaxzes
Target stub.exe
SHA256 a00428527fb92182aa0fce541e09b4d7dcb19b00af756f5e15c2dc7c6747bf93
Tags
chaos defense_evasion evasion execution impact ransomware spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a00428527fb92182aa0fce541e09b4d7dcb19b00af756f5e15c2dc7c6747bf93

Threat Level: Known bad

The file stub.exe was found to be: Known bad.

Malicious Activity Summary

chaos defense_evasion evasion execution impact ransomware spyware stealer

Chaos Ransomware

Chaos family

Chaos

Deletes shadow copies

Modifies boot configuration data using bcdedit

Deletes backup catalog

Drops startup file

Reads user/profile data of web browsers

Checks computer location settings

Executes dropped EXE

Drops desktop.ini file(s)

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Uses Volume Shadow Copy service COM API

Checks SCSI registry key(s)

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: AddClipboardFormatListener

Opens file in notepad (likely ransom note)

Modifies registry class

Interacts with shadow copies

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-03-22 17:55

Signatures

Chaos Ransomware

Description Indicator Process Target
N/A N/A N/A N/A

Chaos family

chaos

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2025-03-22 17:55

Reported

2025-03-22 17:58

Platform

win10v2004-20250314-en

Max time kernel

109s

Max time network

115s

Command Line

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

Signatures

Chaos

ransomware chaos

Chaos Ransomware

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A

Chaos family

chaos

Deletes shadow copies

ransomware defense_evasion impact execution

Modifies boot configuration data using bcdedit

ransomware evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\bcdedit.exe N/A
N/A N/A C:\Windows\system32\bcdedit.exe N/A

Deletes backup catalog

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\wbadmin.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Roaming\stub.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\stub.url C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt C:\Users\Admin\AppData\Roaming\stub.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A

Reads user/profile data of web browsers

spyware stealer

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification F:\$RECYCLE.BIN\S-1-5-21-1062200478-553497403-3857448183-1000\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Downloads\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Favorites\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\System Tools\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Desktop\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Videos\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Music\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\OneDrive\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Documents\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Desktop\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Contacts\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Documents\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Saved Games\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Videos\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Links\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Searches\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Music\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A

Enumerates physical storage devices

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000 C:\Windows\System32\vds.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName C:\Windows\System32\vds.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000 C:\Windows\System32\vds.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName C:\Windows\System32\vds.exe N/A

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\vssadmin.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1062200478-553497403-3857448183-1000_Classes\Local Settings C:\Users\Admin\AppData\Roaming\stub.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\NOTEPAD.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 36 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 36 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\wbengine.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\wbengine.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\system32\wbengine.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2268 wrote to memory of 6000 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Users\Admin\AppData\Roaming\stub.exe
PID 2268 wrote to memory of 6000 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Users\Admin\AppData\Roaming\stub.exe
PID 6000 wrote to memory of 4488 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 6000 wrote to memory of 4488 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 4488 wrote to memory of 3056 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 4488 wrote to memory of 3056 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 4488 wrote to memory of 4628 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 4488 wrote to memory of 4628 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 6000 wrote to memory of 4820 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 6000 wrote to memory of 4820 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 4820 wrote to memory of 5628 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 4820 wrote to memory of 5628 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 4820 wrote to memory of 5280 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 4820 wrote to memory of 5280 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 6000 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 6000 wrote to memory of 3160 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 3160 wrote to memory of 3484 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\wbadmin.exe
PID 3160 wrote to memory of 3484 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\wbadmin.exe
PID 6000 wrote to memory of 2320 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\system32\NOTEPAD.EXE
PID 6000 wrote to memory of 2320 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\system32\NOTEPAD.EXE

Uses Task Scheduler COM API

persistence

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\stub.exe

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

C:\Users\Admin\AppData\Roaming\stub.exe

"C:\Users\Admin\AppData\Roaming\stub.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete

C:\Windows\system32\vssadmin.exe

vssadmin delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\Wbem\WMIC.exe

wmic shadowcopy delete

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} bootstatuspolicy ignoreallfailures

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} recoveryenabled no

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet

C:\Windows\system32\wbadmin.exe

wbadmin delete catalog -quiet

C:\Windows\system32\wbengine.exe

"C:\Windows\system32\wbengine.exe"

C:\Windows\System32\vdsldr.exe

C:\Windows\System32\vdsldr.exe -Embedding

C:\Windows\System32\vds.exe

C:\Windows\System32\vds.exe

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.180.3:80 c.pki.goog tcp

Files

memory/2268-0-0x00007FFA2EF23000-0x00007FFA2EF25000-memory.dmp

memory/2268-1-0x0000000000850000-0x000000000085C000-memory.dmp

C:\Users\Admin\AppData\Roaming\stub.exe

MD5 8b75fae87885a0b1a0c3c2b601d6e399
SHA1 120224bd569c681c4cbdf879f341145081bd9317
SHA256 a00428527fb92182aa0fce541e09b4d7dcb19b00af756f5e15c2dc7c6747bf93
SHA512 6719ae41b3918ba58a036e57720303f2b864797b77863834de14451bf8b524c6138e3ab74237258b2a32b8d04498debcda593adbcf418565e714f0506dd5f3c9

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\stub.exe.log

MD5 28d7fcc2b910da5e67ebb99451a5f598
SHA1 a5bf77a53eda1208f4f37d09d82da0b9915a6747
SHA256 2391511d0a66ed9f84ae54254f51c09e43be01ad685db80da3201ec880abd49c
SHA512 2d8eb65cbf04ca506f4ef3b9ae13ccf05ebefab702269ba70ffd1ce9e6c615db0a3ee3ac0e81a06f546fc3250b7b76155dd51241c41b507a441b658c8e761df6

memory/6000-15-0x00007FFA2EF20000-0x00007FFA2F9E1000-memory.dmp

C:\Users\Admin\Desktop\read_it.txt

MD5 76cf4b4b048d3adad48300ddb890b166
SHA1 1099a3ea6d9b92ff9e9fb1fbcaa51b907c65f911
SHA256 55cd6766a0830a3e75eac538e955baa64a2aa5c7ca56661d080919cbe87ea472
SHA512 0ac5807d857cf75ed64bbcd5fcd70d98e08f6a625f774da1402c56228aa492603a578d9461e388f793d3b718d7a19a659e68bb0a043013fb3ce02d71f5b20b4b

memory/6000-71-0x00007FFA2EF20000-0x00007FFA2F9E1000-memory.dmp

memory/6000-73-0x00007FFA2EF20000-0x00007FFA2F9E1000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2025-03-22 17:55

Reported

2025-03-22 17:58

Platform

win7-20241010-en

Max time kernel

23s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

Signatures

Chaos

ransomware chaos

Chaos Ransomware

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Chaos family

chaos

Deletes shadow copies

ransomware defense_evasion impact execution

Modifies boot configuration data using bcdedit

ransomware evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\bcdedit.exe N/A
N/A N/A C:\Windows\system32\bcdedit.exe N/A

Deletes backup catalog

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\wbadmin.exe N/A

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\stub.url C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt C:\Users\Admin\AppData\Roaming\stub.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A

Reads user/profile data of web browsers

spyware stealer

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification C:\Users\Admin\Contacts\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Administrative Tools\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Documents\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Links\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Music\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Favorites\Links for United States\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Searches\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Accessibility\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3692679935-4019334568-335155002-1000\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Downloads\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Videos\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Favorites\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Videos\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Music\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Videos\Sample Videos\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Documents\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\System Tools\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Pictures\Sample Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Desktop\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Desktop\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Music\Sample Music\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\Saved Games\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A
File opened for modification C:\Users\Public\Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\stub.exe N/A

Enumerates physical storage devices

Interacts with shadow copies

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\vssadmin.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\NOTEPAD.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\stub.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 33 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 34 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: 35 N/A C:\Windows\System32\Wbem\WMIC.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\wbengine.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\wbengine.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\system32\wbengine.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1668 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Users\Admin\AppData\Roaming\stub.exe
PID 1668 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Users\Admin\AppData\Roaming\stub.exe
PID 1668 wrote to memory of 2076 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Users\Admin\AppData\Roaming\stub.exe
PID 2076 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 2076 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 2076 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 1676 wrote to memory of 588 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1676 wrote to memory of 588 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1676 wrote to memory of 588 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\vssadmin.exe
PID 1676 wrote to memory of 2600 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 1676 wrote to memory of 2600 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 1676 wrote to memory of 2600 N/A C:\Windows\System32\cmd.exe C:\Windows\System32\Wbem\WMIC.exe
PID 2076 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 2076 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 2076 wrote to memory of 1588 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 1588 wrote to memory of 2792 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1588 wrote to memory of 2792 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1588 wrote to memory of 2792 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1588 wrote to memory of 2468 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1588 wrote to memory of 2468 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 1588 wrote to memory of 2468 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\bcdedit.exe
PID 2076 wrote to memory of 672 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 2076 wrote to memory of 672 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 2076 wrote to memory of 672 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\System32\cmd.exe
PID 672 wrote to memory of 2224 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\wbadmin.exe
PID 672 wrote to memory of 2224 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\wbadmin.exe
PID 672 wrote to memory of 2224 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\wbadmin.exe
PID 2076 wrote to memory of 1032 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\system32\NOTEPAD.EXE
PID 2076 wrote to memory of 1032 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\system32\NOTEPAD.EXE
PID 2076 wrote to memory of 1032 N/A C:\Users\Admin\AppData\Roaming\stub.exe C:\Windows\system32\NOTEPAD.EXE

Uses Task Scheduler COM API

persistence

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Users\Admin\AppData\Local\Temp\stub.exe

"C:\Users\Admin\AppData\Local\Temp\stub.exe"

C:\Users\Admin\AppData\Roaming\stub.exe

"C:\Users\Admin\AppData\Roaming\stub.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete

C:\Windows\system32\vssadmin.exe

vssadmin delete shadows /all /quiet

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\System32\Wbem\WMIC.exe

wmic shadowcopy delete

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} bootstatuspolicy ignoreallfailures

C:\Windows\system32\bcdedit.exe

bcdedit /set {default} recoveryenabled no

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet

C:\Windows\system32\wbadmin.exe

wbadmin delete catalog -quiet

C:\Windows\system32\wbengine.exe

"C:\Windows\system32\wbengine.exe"

C:\Windows\System32\vdsldr.exe

C:\Windows\System32\vdsldr.exe -Embedding

C:\Windows\System32\vds.exe

C:\Windows\System32\vds.exe

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\read_it.txt

Network

N/A

Files

memory/1668-0-0x000007FEF5EF3000-0x000007FEF5EF4000-memory.dmp

memory/1668-1-0x00000000002D0000-0x00000000002DC000-memory.dmp

C:\Users\Admin\AppData\Roaming\stub.exe

MD5 8b75fae87885a0b1a0c3c2b601d6e399
SHA1 120224bd569c681c4cbdf879f341145081bd9317
SHA256 a00428527fb92182aa0fce541e09b4d7dcb19b00af756f5e15c2dc7c6747bf93
SHA512 6719ae41b3918ba58a036e57720303f2b864797b77863834de14451bf8b524c6138e3ab74237258b2a32b8d04498debcda593adbcf418565e714f0506dd5f3c9

memory/2076-7-0x00000000008C0000-0x00000000008CC000-memory.dmp

C:\Users\Admin\Desktop\read_it.txt

MD5 76cf4b4b048d3adad48300ddb890b166
SHA1 1099a3ea6d9b92ff9e9fb1fbcaa51b907c65f911
SHA256 55cd6766a0830a3e75eac538e955baa64a2aa5c7ca56661d080919cbe87ea472
SHA512 0ac5807d857cf75ed64bbcd5fcd70d98e08f6a625f774da1402c56228aa492603a578d9461e388f793d3b718d7a19a659e68bb0a043013fb3ce02d71f5b20b4b

memory/2076-21-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

memory/2076-71-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

memory/2076-73-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp

memory/2076-74-0x000007FEF5EF0000-0x000007FEF68DC000-memory.dmp