Analysis Overview
SHA256
d9eba524d87f742cebb5cb5788f7ab38726184321f1998dcb28488d15fa3b348
Threat Level: Known bad
The file 930b9c1792a539acdb051af34de91060.bin was found to be: Known bad.
Malicious Activity Summary
Blackmatter family
BlackMatter Ransomware
Modifies extensions of user files
Enumerates connected drives
Sets desktop wallpaper using registry
Suspicious use of NtSetInformationThreadHideFromDebugger
Modifies Control Panel
Modifies registry class
Uses Volume Shadow Copy service COM API
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-12 01:44
Signatures
Blackmatter family
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-12 01:44
Reported
2023-03-12 01:46
Platform
win7-20230220-en
Max time kernel
27s
Max time network
29s
Command Line
Signatures
BlackMatter Ransomware
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\Pictures\GetStart.tiff | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SubmitJoin.png => C:\Users\Admin\Pictures\SubmitJoin.png.sfgL6ekLx | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SubmitJoin.png.sfgL6ekLx | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\sfgL6ekLx.bmp" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\sfgL6ekLx.bmp" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1914912747-3343861975-731272777-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\sfgL6ekLx\DefaultIcon\ = "C:\\ProgramData\\sfgL6ekLx.ico" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\.sfgL6ekLx | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\.sfgL6ekLx\ = "sfgL6ekLx" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\sfgL6ekLx\DefaultIcon | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\sfgL6ekLx | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe
"C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
Files
memory/912-55-0x0000000000CF0000-0x0000000000D30000-memory.dmp
C:\Users\sfgL6ekLx.README.txt
| MD5 | a34fb07ce7696459f74aef7fefb56352 |
| SHA1 | dbd83ff37e90810eb57a802464ac5458ee092d5d |
| SHA256 | b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04 |
| SHA512 | 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8 |
Analysis: behavioral2
Detonation Overview
Submitted
2023-03-12 01:44
Reported
2023-03-12 01:46
Platform
win10v2004-20230220-en
Max time kernel
85s
Max time network
153s
Command Line
Signatures
BlackMatter Ransomware
Modifies extensions of user files
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\Z: | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\kuwiiv4i7.bmp" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\kuwiiv4i7.bmp" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
Modifies Control Panel
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\kuwiiv4i7\DefaultIcon | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\kuwiiv4i7 | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\kuwiiv4i7\DefaultIcon\ = "C:\\ProgramData\\kuwiiv4i7.ico" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\.kuwiiv4i7 | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\.kuwiiv4i7\ = "kuwiiv4i7" | C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe
"C:\Users\Admin\AppData\Local\Temp\7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| US | 93.184.220.29:80 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| US | 8.8.8.8:53 | 210.81.184.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 133.211.185.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 104.219.191.52.in-addr.arpa | udp |
| BG | 213.91.128.133:10060 | tcp | |
| US | 20.189.173.5:443 | tcp | |
| US | 8.8.8.8:53 | 151.122.125.40.in-addr.arpa | udp |
| NL | 173.223.113.164:443 | tcp | |
| NL | 173.223.113.131:80 | tcp | |
| US | 8.8.8.8:53 | 113.238.32.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 76.38.195.152.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 45.8.109.52.in-addr.arpa | udp |
| NL | 8.238.177.126:80 | tcp |
Files
memory/2144-133-0x00000000026C0000-0x00000000026D0000-memory.dmp
memory/2144-134-0x00000000026C0000-0x00000000026D0000-memory.dmp
memory/2144-135-0x00000000026C0000-0x00000000026D0000-memory.dmp
\Device\HarddiskVolume1\kuwiiv4i7.README.txt
| MD5 | a34fb07ce7696459f74aef7fefb56352 |
| SHA1 | dbd83ff37e90810eb57a802464ac5458ee092d5d |
| SHA256 | b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04 |
| SHA512 | 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8 |