Analysis Overview
SHA256
37ca1cfa1f30b57408d3e855f98f9e5fd6900b23643bbc0c6163a875edf00b60
Threat Level: Known bad
The file 0.exe was found to be: Known bad.
Malicious Activity Summary
Chaos family
Chaos Ransomware
Chaos
Renames multiple (186) files with added filename extension
Renames multiple (197) files with added filename extension
Drops startup file
Checks computer location settings
Reads user/profile data of web browsers
Drops desktop.ini file(s)
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Opens file in notepad (likely ransom note)
Suspicious behavior: AddClipboardFormatListener
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-09-14 12:42
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
2023-09-14 12:42
Reported
2023-09-14 12:45
Platform
win7-20230831-en
Max time kernel
118s
Max time network
124s
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 (197) 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\0.exe | N/A |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PLEASEREAD.txt | C:\Users\Admin\AppData\Local\Temp\0.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\Public\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Downloads\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\Links for United States\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Public\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Public\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Music\Sample Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\Desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Saved Games\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Contacts\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Pictures\Sample Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-3513876443-2771975297-1923446376-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Videos\Sample Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Searches\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.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\0.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2992 wrote to memory of 2664 | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2992 wrote to memory of 2664 | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 2992 wrote to memory of 2664 | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\0.exe
"C:\Users\Admin\AppData\Local\Temp\0.exe"
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
Network
Files
memory/2992-0-0x0000000001140000-0x0000000001234000-memory.dmp
memory/2992-1-0x000007FEF5AC0000-0x000007FEF64AC000-memory.dmp
memory/2992-2-0x000000001AF30000-0x000000001AFB0000-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/2992-448-0x000007FEF5AC0000-0x000007FEF64AC000-memory.dmp
memory/2992-449-0x000000001AF30000-0x000000001AFB0000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2023-09-14 12:42
Reported
2023-09-14 12:45
Platform
win10v2004-20230831-en
Max time kernel
137s
Max time network
141s
Command Line
Signatures
Chaos
Chaos Ransomware
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Renames multiple (186) files with added filename extension
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PLEASEREAD.txt | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Searches\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Public\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Downloads\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\OneDrive\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Libraries\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Documents\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\Camera Roll\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\Saved Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\AccountPictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Public\Videos\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Desktop\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-1980726966-773384374-2129981223-1000\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Contacts\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Public\Pictures\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Music\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Favorites\Links\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\SendTo\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
| File opened for modification | C:\Users\Admin\Saved Games\desktop.ini | C:\Users\Admin\AppData\Local\Temp\0.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\0.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\0.exe | N/A |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1980726966-773384374-2129981223-1000_Classes\Local Settings | C:\Users\Admin\AppData\Local\Temp\0.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\0.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4992 wrote to memory of 864 | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 4992 wrote to memory of 864 | N/A | C:\Users\Admin\AppData\Local\Temp\0.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\0.exe
"C:\Users\Admin\AppData\Local\Temp\0.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 | 73.31.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 59.128.231.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 208.194.73.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 146.78.124.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 126.132.60.8.in-addr.arpa | udp |
Files
memory/4992-0-0x0000000000D60000-0x0000000000E54000-memory.dmp
memory/4992-1-0x00007FFE4B420000-0x00007FFE4BEE1000-memory.dmp
memory/4992-2-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
C:\Users\Admin\Documents\PLEASEREAD.txt
| MD5 | 929ad339c51b2a3b1bd4b3b7acf47379 |
| SHA1 | b555580144c617a5950aa55a800b09decb5e4c80 |
| SHA256 | b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8 |
| SHA512 | 0319b0c3a4b7223a489b7883b9a6d5f6c51fc0285a96940635b0247e0162b7a6bcc48c5c91b0896e1d676b5bbeac5e8ada4eb200b847cda1a33efc31be020dda |
memory/4992-96-0x00007FFE4B420000-0x00007FFE4BEE1000-memory.dmp
memory/4992-374-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
C:\Users\Admin\AppData\Roaming\PLEASEREAD.txt
| MD5 | 929ad339c51b2a3b1bd4b3b7acf47379 |
| SHA1 | b555580144c617a5950aa55a800b09decb5e4c80 |
| SHA256 | b94bd148bc968f4e6c70f8479a16588424d587812cd17e9b2cc4ba8766d1b5d8 |
| SHA512 | 0319b0c3a4b7223a489b7883b9a6d5f6c51fc0285a96940635b0247e0162b7a6bcc48c5c91b0896e1d676b5bbeac5e8ada4eb200b847cda1a33efc31be020dda |