Analysis Overview
SHA256
37ca1cfa1f30b57408d3e855f98f9e5fd6900b23643bbc0c6163a875edf00b60
Threat Level: Known bad
The file 1.exe was found to be: Known bad.
Malicious Activity Summary
Chaos family
Chaos
Chaos Ransomware
Renames multiple (198) files with added filename extension
Renames multiple (203) files with added filename extension
Drops startup file
Checks computer location settings
Reads user/profile data of web browsers
Drops desktop.ini file(s)
Enumerates physical storage devices
Unsigned PE
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Opens file in notepad (likely ransom note)
Suspicious behavior: AddClipboardFormatListener
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-09-11 03:28
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: behavioral2
Detonation Overview
Submitted
2023-09-11 03:28
Reported
2023-09-11 03:30
Platform
win10v2004-20230831-en
Max time kernel
142s
Max time network
155s
Command Line
Signatures
Chaos
Chaos Ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Renames multiple (198) files with added filename extension
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PLEASEREAD.txt | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Reads user/profile data of web browsers
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessibility\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Contacts\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\OneDrive\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Searches\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Downloads\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\Camera Roll\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\Saved Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-1859779917-101786662-3680946609-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Saved Games\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1859779917-101786662-3680946609-1000_Classes\Local Settings | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 220 wrote to memory of 3856 | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 220 wrote to memory of 3856 | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 158.240.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 126.177.238.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 67.112.168.52.in-addr.arpa | udp |
Files
memory/220-0-0x0000000000010000-0x0000000000104000-memory.dmp
memory/220-1-0x00007FF920C60000-0x00007FF921721000-memory.dmp
memory/220-2-0x000000001AE50000-0x000000001AE60000-memory.dmp
C:\Users\Admin\Documents\PLEASEREAD.txt
| MD5 | 929ad339c51b2a3b1bd4b3b7acf47379 |
| SHA1 | b555580144c617a5950aa55a800b09decb5e4c80 |
| SHA256 | b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8 |
| SHA512 | 0319b0c3a4b7223a489b7883b9a6d5f6c51fc0285a96940635b0247e0162b7a6bcc48c5c91b0896e1d676b5bbeac5e8ada4eb200b847cda1a33efc31be020dda |
C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
| MD5 | 929ad339c51b2a3b1bd4b3b7acf47379 |
| SHA1 | b555580144c617a5950aa55a800b09decb5e4c80 |
| SHA256 | b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8 |
| SHA512 | 0319b0c3a4b7223a489b7883b9a6d5f6c51fc0285a96940635b0247e0162b7a6bcc48c5c91b0896e1d676b5bbeac5e8ada4eb200b847cda1a33efc31be020dda |
memory/220-449-0x00007FF920C60000-0x00007FF921721000-memory.dmp
memory/220-450-0x000000001AE50000-0x000000001AE60000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2023-09-11 03:28
Reported
2023-09-11 03:30
Platform
win7-20230831-en
Max time kernel
122s
Max time network
125s
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 |
Renames multiple (203) files with added filename extension
Drops startup file
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PLEASEREAD.txt | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Reads user/profile data of web browsers
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\Downloads\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Accessories\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Pictures\Sample Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Saved Games\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Maintenance\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Music\Sample Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\Links for United States\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Searches\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Internet Explorer\Quick Launch\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.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\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Contacts\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Videos\Sample Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-607259312-1573743425-2763420908-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| File opened for modification | C:\Users\Public\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\1.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\Local\Temp\1.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2956 wrote to memory of 2716 | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2956 wrote to memory of 2716 | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2956 wrote to memory of 2716 | N/A | C:\Users\Admin\AppData\Local\Temp\1.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
Network
Files
memory/2956-0-0x00000000002F0000-0x00000000003E4000-memory.dmp
memory/2956-1-0x000007FEF5960000-0x000007FEF634C000-memory.dmp
memory/2956-2-0x000000001B010000-0x000000001B090000-memory.dmp
C:\Users\Admin\Documents\PLEASEREAD.txt
| MD5 | 929ad339c51b2a3b1bd4b3b7acf47379 |
| SHA1 | b555580144c617a5950aa55a800b09decb5e4c80 |
| SHA256 | b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8 |
| SHA512 | 0319b0c3a4b7223a489b7883b9a6d5f6c51fc0285a96940635b0247e0162b7a6bcc48c5c91b0896e1d676b5bbeac5e8ada4eb200b847cda1a33efc31be020dda |
C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
| MD5 | 929ad339c51b2a3b1bd4b3b7acf47379 |
| SHA1 | b555580144c617a5950aa55a800b09decb5e4c80 |
| SHA256 | b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8 |
| SHA512 | 0319b0c3a4b7223a489b7883b9a6d5f6c51fc0285a96940635b0247e0162b7a6bcc48c5c91b0896e1d676b5bbeac5e8ada4eb200b847cda1a33efc31be020dda |
memory/2956-460-0x000007FEF5960000-0x000007FEF634C000-memory.dmp
memory/2956-461-0x000000001B010000-0x000000001B090000-memory.dmp