Analysis Overview
SHA256
04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08
Threat Level: Known bad
The file 04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08.exe was found to be: Known bad.
Malicious Activity Summary
Chaos
Chaos family
Chaos Ransomware
Modifies boot configuration data using bcdedit
Reads user/profile data of web browsers
Drops startup file
Checks computer location settings
Executes dropped EXE
Drops desktop.ini file(s)
Sets desktop wallpaper using registry
Enumerates physical storage devices
Unsigned PE
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Opens file in notepad (likely ransom note)
Suspicious use of FindShellTrayWindow
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-09-18 08:29
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
2023-09-18 08:29
Reported
2023-09-18 08:31
Platform
win10v2004-20230915-en
Max time kernel
91s
Max time network
96s
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 |
| N/A | N/A | N/A | N/A |
Modifies boot configuration data using bcdedit
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\bcdedit.exe | N/A |
| N/A | N/A | C:\Windows\system32\bcdedit.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Roaming\svchost.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 |
| 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\IMPORTANT.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
Drops desktop.ini file(s)
| Description | Indicator | Process | Target |
| 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\OneDrive\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\Start Menu\Programs\System Tools\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 |
| 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\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\Desktop\desktop.ini | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
| File opened for modification | F:\$RECYCLE.BIN\S-1-5-21-2344688013-2965468717-2034126-1000\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\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\Maintenance\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\Contacts\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\Recent\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\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\Public\Music\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\Saved Games\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\AppData\Roaming\Microsoft\Windows\SendTo\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\Public\Pictures\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\Saved 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\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\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 |
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2344688013-2965468717-2034126-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\zm4xo5to9.jpg" | 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-1-5-21-2344688013-2965468717-2034126-1000_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\04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\svchost.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\NOTEPAD.EXE | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08.exe
"C:\Users\Admin\AppData\Local\Temp\04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08.exe"
C:\Users\Admin\AppData\Roaming\svchost.exe
"C:\Users\Admin\AppData\Roaming\svchost.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /C bcdedit /set {default} bootstatuspolicy ignoreallfailures & bcdedit /set {default} recoveryenabled no
C:\Windows\system32\bcdedit.exe
bcdedit /set {default} bootstatuspolicy ignoreallfailures
C:\Windows\system32\bcdedit.exe
bcdedit /set {default} recoveryenabled no
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\IMPORTANT.txt
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 74.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 254.210.247.8.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 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 54.120.234.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.81.21.72.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
Files
memory/1948-0-0x0000000000B70000-0x0000000000B80000-memory.dmp
memory/1948-1-0x00007FFFABFA0000-0x00007FFFACA61000-memory.dmp
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | b1228ba24ca5f75f8df9d5d177e5bb2b |
| SHA1 | 1895758de51ccfefa40239aa11055540c8c5deb7 |
| SHA256 | 04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08 |
| SHA512 | 7abc1df0089a1a00aadc11c33eecffb5d85258acc4eac0b261ceaea77e814eaf671506383fe0074fd5779b8bc58e0f48f0d15309aa81aecf27ecc6633da4c5a4 |
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | b1228ba24ca5f75f8df9d5d177e5bb2b |
| SHA1 | 1895758de51ccfefa40239aa11055540c8c5deb7 |
| SHA256 | 04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08 |
| SHA512 | 7abc1df0089a1a00aadc11c33eecffb5d85258acc4eac0b261ceaea77e814eaf671506383fe0074fd5779b8bc58e0f48f0d15309aa81aecf27ecc6633da4c5a4 |
C:\Users\Admin\AppData\Roaming\svchost.exe
| MD5 | b1228ba24ca5f75f8df9d5d177e5bb2b |
| SHA1 | 1895758de51ccfefa40239aa11055540c8c5deb7 |
| SHA256 | 04b106b179c202c67361aa4debad5d82f79a1927ab0ab8abc2ef350d18894b08 |
| SHA512 | 7abc1df0089a1a00aadc11c33eecffb5d85258acc4eac0b261ceaea77e814eaf671506383fe0074fd5779b8bc58e0f48f0d15309aa81aecf27ecc6633da4c5a4 |
memory/4476-14-0x00007FFFABFA0000-0x00007FFFACA61000-memory.dmp
memory/1948-15-0x00007FFFABFA0000-0x00007FFFACA61000-memory.dmp
C:\Users\Admin\Documents\IMPORTANT.txt
| MD5 | 46fe77013e7336b17e5270cc708a1da4 |
| SHA1 | c8949dbcaac904160eacafcbde51b52c0e5110f1 |
| SHA256 | fff91118e1d44de84c1876cfcb6ee5413c336dca888efb2d9af084047fe06cf6 |
| SHA512 | b4e5bc4e20005c869e914ab9314944215dced635991772896d07731bf1711708ce74f5660bab8669de965eeac00ce7b56cfb5fd650437dfe3336c90eb3790d52 |
C:\Users\Admin\AppData\Roaming\IMPORTANT.txt
| MD5 | 46fe77013e7336b17e5270cc708a1da4 |
| SHA1 | c8949dbcaac904160eacafcbde51b52c0e5110f1 |
| SHA256 | fff91118e1d44de84c1876cfcb6ee5413c336dca888efb2d9af084047fe06cf6 |
| SHA512 | b4e5bc4e20005c869e914ab9314944215dced635991772896d07731bf1711708ce74f5660bab8669de965eeac00ce7b56cfb5fd650437dfe3336c90eb3790d52 |
memory/4476-435-0x00007FFFABFA0000-0x00007FFFACA61000-memory.dmp