Malware Analysis Report

2024-10-19 07:13

Sample ID 240319-cahyjaeh6s
Target d4eb2a62ee12659fab50fbf927a6e9ab
SHA256 db4b65445f8a7d1f8827e510affccf6a1fd557daf81b49b50b93beea759153f8
Tags
chaos ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

db4b65445f8a7d1f8827e510affccf6a1fd557daf81b49b50b93beea759153f8

Threat Level: Known bad

The file d4eb2a62ee12659fab50fbf927a6e9ab was found to be: Known bad.

Malicious Activity Summary

chaos ransomware

Chaos Ransomware

Chaos

Chaos family

Checks computer location settings

Executes dropped EXE

Drops startup file

Drops desktop.ini file(s)

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Modifies registry class

Suspicious use of WriteProcessMemory

Suspicious behavior: AddClipboardFormatListener

Opens file in notepad (likely ransom note)

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-19 01:52

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

2024-03-19 01:52

Reported

2024-03-19 01:54

Platform

win7-20231129-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.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

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

Executes dropped EXE

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

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification F:\$RECYCLE.BIN\S-1-5-21-3627615824-4061627003-3019543961-1000\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\Favorites\Links for United States\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\Contacts\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\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\Downloads\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\Favorites\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\Links\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

Enumerates physical storage devices

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe

"C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.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

Network

N/A

Files

memory/2340-0-0x0000000000E00000-0x0000000000E0C000-memory.dmp

memory/2340-1-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

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

MD5 d4eb2a62ee12659fab50fbf927a6e9ab
SHA1 529f9e09d02a107d6b50387c976b1209229545aa
SHA256 db4b65445f8a7d1f8827e510affccf6a1fd557daf81b49b50b93beea759153f8
SHA512 2ddd79445b40cb8f8ec5874b0ce2842bc0d6a5045b3d5d35efa7130b3fc88c6c8482499ee2ab6d24919556b69790758469934fae943f0058d1e13a3a11511a9e

memory/2832-7-0x00000000008E0000-0x00000000008EC000-memory.dmp

memory/2832-9-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

memory/2340-8-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

memory/2832-11-0x000000001ADF0000-0x000000001AE70000-memory.dmp

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

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

memory/2832-239-0x000007FEF5BA0000-0x000007FEF658C000-memory.dmp

memory/2832-240-0x000000001ADF0000-0x000000001AE70000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-19 01:52

Reported

2024-03-19 01:54

Platform

win10v2004-20240226-en

Max time kernel

148s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Roaming\svchost.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe 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

Executes dropped EXE

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

Drops desktop.ini file(s)

Description Indicator Process Target
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\Camera Roll\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\Saved Games\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 F:\$RECYCLE.BIN\S-1-5-21-3808065738-1666277613-1125846146-1000\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\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\Searches\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\Desktop\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\Favorites\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

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.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
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\d4eb2a62ee12659fab50fbf927a6e9ab.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\svchost.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe

"C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.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 (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3900 --field-trial-handle=2304,i,6987730730348465820,3913273227385401271,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
GB 172.217.169.74:443 tcp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 9.179.89.13.in-addr.arpa udp
US 8.8.8.8:53 44.56.20.217.in-addr.arpa udp

Files

memory/1648-0-0x0000000000B00000-0x0000000000B0C000-memory.dmp

memory/1648-1-0x00007FFC3D690000-0x00007FFC3E151000-memory.dmp

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

MD5 d4eb2a62ee12659fab50fbf927a6e9ab
SHA1 529f9e09d02a107d6b50387c976b1209229545aa
SHA256 db4b65445f8a7d1f8827e510affccf6a1fd557daf81b49b50b93beea759153f8
SHA512 2ddd79445b40cb8f8ec5874b0ce2842bc0d6a5045b3d5d35efa7130b3fc88c6c8482499ee2ab6d24919556b69790758469934fae943f0058d1e13a3a11511a9e

memory/1648-14-0x00007FFC3D690000-0x00007FFC3E151000-memory.dmp

memory/3508-15-0x00007FFC3D690000-0x00007FFC3E151000-memory.dmp

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

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

memory/3508-238-0x00007FFC3D690000-0x00007FFC3E151000-memory.dmp