Analysis Overview
SHA256
db4b65445f8a7d1f8827e510affccf6a1fd557daf81b49b50b93beea759153f8
Threat Level: Known bad
The file d4eb2a62ee12659fab50fbf927a6e9ab was found to be: Known bad.
Malicious Activity Summary
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
Enterprise Matrix V15
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
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
Signatures
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)
| 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\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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2340 wrote to memory of 2832 | N/A | C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 2340 wrote to memory of 2832 | N/A | C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 2340 wrote to memory of 2832 | N/A | C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 2832 wrote to memory of 1516 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2832 wrote to memory of 1516 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2832 wrote to memory of 1516 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
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
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
Signatures
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)
| 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
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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1648 wrote to memory of 3508 | N/A | C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 1648 wrote to memory of 3508 | N/A | C:\Users\Admin\AppData\Local\Temp\d4eb2a62ee12659fab50fbf927a6e9ab.exe | C:\Users\Admin\AppData\Roaming\svchost.exe |
| PID 3508 wrote to memory of 4148 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 3508 wrote to memory of 4148 | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | C:\Windows\system32\NOTEPAD.EXE |
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