Malware Analysis Report

2024-08-06 16:04

Sample ID 240424-sg7hgacb31
Target 1234.exe
SHA256 1512810ee7380778dff64705a8b0760fd11403eae4d0f98f7cfdd6b2b57a10af
Tags
chaos ransomware spyware stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1512810ee7380778dff64705a8b0760fd11403eae4d0f98f7cfdd6b2b57a10af

Threat Level: Known bad

The file 1234.exe was found to be: Known bad.

Malicious Activity Summary

chaos ransomware spyware stealer

Chaos family

Chaos

Chaos Ransomware

Reads user/profile data of web browsers

Drops startup file

Executes dropped EXE

Drops desktop.ini file(s)

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Modifies registry class

Checks processor information in registry

Suspicious behavior: AddClipboardFormatListener

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Enumerates system info in registry

Suspicious use of SetWindowsHookEx

Opens file in notepad (likely ransom note)

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Unsecured Credentials
T1552
Credentials In Files
T1552.001
Discovery
TA0007
System Information Discovery
T1082
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Data from Local System
T1005
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-04-24 15:06

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: behavioral1

Detonation Overview

Submitted

2024-04-24 15:06

Reported

2024-04-24 15:07

Platform

win10-20240404-en

Max time kernel

25s

Max time network

27s

Command Line

"C:\Users\Admin\AppData\Local\Temp\1234.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

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.url C:\Users\Admin\AppData\Roaming\svchost.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\svchost.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\read_it.txt C:\Users\Admin\AppData\Roaming\svchost.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.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-1-5-21-4106386276-4127174233-3637007343-1000\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Contacts\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Downloads\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Pictures\Camera Roll\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\OneDrive\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Favorites\Links\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.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\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Public\Documents\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Public\Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Public\Music\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.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\svchost.exe N/A
File opened for modification C:\Users\Admin\Saved Games\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Searches\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Links\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Documents\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Pictures\Saved Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Music\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.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\svchost.exe N/A
File opened for modification C:\Users\Admin\Pictures\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Videos\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.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\svchost.exe N/A
File opened for modification C:\Users\Public\Desktop\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Desktop\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A
File opened for modification C:\Users\Admin\Favorites\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.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\svchost.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\svchost.exe N/A
File opened for modification C:\Users\Public\Videos\desktop.ini C:\Users\Admin\AppData\Roaming\svchost.exe N/A

Enumerates physical storage devices

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4106386276-4127174233-3637007343-1000_Classes\Local Settings C:\Users\Admin\AppData\Roaming\svchost.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\svchost.exe N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A
N/A N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\1234.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2676 wrote to memory of 2548 N/A C:\Users\Admin\AppData\Local\Temp\1234.exe C:\Users\Admin\AppData\Roaming\svchost.exe
PID 2676 wrote to memory of 2548 N/A C:\Users\Admin\AppData\Local\Temp\1234.exe C:\Users\Admin\AppData\Roaming\svchost.exe
PID 2548 wrote to memory of 2540 N/A C:\Users\Admin\AppData\Roaming\svchost.exe C:\Windows\system32\NOTEPAD.EXE
PID 2548 wrote to memory of 2540 N/A C:\Users\Admin\AppData\Roaming\svchost.exe C:\Windows\system32\NOTEPAD.EXE

Processes

C:\Users\Admin\AppData\Local\Temp\1234.exe

"C:\Users\Admin\AppData\Local\Temp\1234.exe"

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

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

C:\Windows\system32\NOTEPAD.EXE

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

C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE

"C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\Documents\Files.docx" /o ""

Network

Country Destination Domain Proto
US 8.8.8.8:53 97.32.109.52.in-addr.arpa udp
US 8.8.8.8:53 roaming.officeapps.live.com udp
NL 52.109.89.19:443 roaming.officeapps.live.com tcp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 19.89.109.52.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp

Files

memory/2676-0-0x00000000003D0000-0x00000000003DC000-memory.dmp

memory/2676-1-0x00007FFA5EE10000-0x00007FFA5F7FC000-memory.dmp

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

MD5 56db115b1910067cb1011b55d4d0763d
SHA1 37672ddd4bf1deaaf8aff7fbdaad8455170b3033
SHA256 1512810ee7380778dff64705a8b0760fd11403eae4d0f98f7cfdd6b2b57a10af
SHA512 30120552efb26292d5058ccffa50efa7b6e5f509edacbb12e1becdd04935ac211c9fb23433ea1a8c33682f326791bdab4ede714a5d7fcd49638fab181367e0ec

memory/2676-8-0x00007FFA5EE10000-0x00007FFA5F7FC000-memory.dmp

memory/2548-9-0x00007FFA5EE10000-0x00007FFA5F7FC000-memory.dmp

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

MD5 4217b8b83ce3c3f70029a056546f8fd0
SHA1 487cdb5733d073a0427418888e8f7070fe782a03
SHA256 7d767e907be373c680d1f7884d779588eb643bebb3f27bf3b5ed4864aa4d8121
SHA512 2a58c99fa52f99c276e27eb98aef2ce1205f16d1e37b7e87eb69e9ecda22b578195a43f1a7f70fead6ba70421abf2f85c917551c191536eaf1f3011d3d24f740

memory/2548-62-0x000000001BF00000-0x000000001C000000-memory.dmp

memory/820-65-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-64-0x00007FFA2A840000-0x00007FFA2A850000-memory.dmp

memory/820-67-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-66-0x00007FFA2A840000-0x00007FFA2A850000-memory.dmp

memory/820-68-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-69-0x00007FFA2A840000-0x00007FFA2A850000-memory.dmp

memory/820-70-0x00007FFA2A840000-0x00007FFA2A850000-memory.dmp

memory/820-71-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-72-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-74-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-73-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-75-0x00007FFA6A100000-0x00007FFA6A1AE000-memory.dmp

memory/820-77-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-79-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-80-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-81-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-82-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-83-0x00007FFA6A100000-0x00007FFA6A1AE000-memory.dmp

memory/820-84-0x00007FFA27580000-0x00007FFA27590000-memory.dmp

memory/2548-85-0x00007FFA5EE10000-0x00007FFA5F7FC000-memory.dmp

memory/820-86-0x00007FFA6A7B0000-0x00007FFA6A98B000-memory.dmp

memory/820-87-0x00007FFA27580000-0x00007FFA27590000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat

MD5 0089a450ac0d5daa3adf503ff0a4729a
SHA1 d0878bd92572f94d86b116f9bf0b14fe8732ebdb
SHA256 475bc454dd4fe83f3039ff97e98878dcb591ce8605b4d4c171775ed6bd392850
SHA512 458edb0f29f7e7d92dfb46981a59d8ff3a9c47ab2f09077000ef03ad063ebb94361adfddeb1e5dbc3857e6c639559bf1a14968ac905fd1d3756bfb786fd362b0

memory/2548-304-0x000000001BF00000-0x000000001C000000-memory.dmp