Analysis Overview
SHA256
7a223a0aa0f88e84a68da6cde7f7f5c3bb2890049b0bf3269230d87d2b027296
Threat Level: Known bad
The file BlackMatter.7a223a0aa0f88e84a68da.bin.exe was found to be: Known bad.
Malicious Activity Summary
Blackmatter family
BlackMatter Ransomware
Modifies extensions of user files
Enumerates connected drives
Suspicious use of NtSetInformationThreadHideFromDebugger
Sets desktop wallpaper using registry
Uses Volume Shadow Copy service COM API
Suspicious use of AdjustPrivilegeToken
Modifies Control Panel
Modifies registry class
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-03-10 21:46
Signatures
Blackmatter family
Analysis: behavioral2
Detonation Overview
Submitted
2023-03-10 21:46
Reported
2023-03-10 21:48
Platform
win10v2004-20230220-en
Max time kernel
146s
Max time network
150s
Command Line
Signatures
BlackMatter Ransomware
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File opened for modification | C:\Users\Admin\Pictures\AssertAdd.tiff | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Enumerates connected drives
| Description | Indicator | Process | Target |
| File opened (read-only) | \??\Z: | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\yUhWnJxWS.bmp" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\yUhWnJxWS.bmp" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\yUhWnJxWS\DefaultIcon\ = "C:\\ProgramData\\yUhWnJxWS.ico" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\.yUhWnJxWS | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\.yUhWnJxWS\ = "yUhWnJxWS" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\yUhWnJxWS\DefaultIcon | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\yUhWnJxWS | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe
"C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
| Country | Destination | Domain | Proto |
| US | 52.152.110.14:443 | tcp | |
| US | 8.8.8.8:53 | 149.220.183.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 210.81.184.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.145.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 232.168.11.51.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 52.152.110.14:443 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| US | 8.8.8.8:53 | 62.13.109.52.in-addr.arpa | udp |
| US | 52.152.110.14:443 | tcp | |
| US | 8.8.8.8:53 | 97.238.32.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 76.38.195.152.in-addr.arpa | udp |
| US | 52.152.110.14:443 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| US | 93.184.220.29:80 | tcp | |
| US | 93.184.221.240:80 | tcp | |
| NL | 173.223.113.164:443 | tcp | |
| NL | 173.223.113.131:80 | tcp | |
| US | 204.79.197.203:80 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| US | 52.152.110.14:443 | tcp | |
| US | 52.152.110.14:443 | tcp |
Files
memory/4292-134-0x0000000000F60000-0x0000000000F70000-memory.dmp
memory/4292-135-0x0000000000F60000-0x0000000000F70000-memory.dmp
memory/4292-136-0x0000000000F60000-0x0000000000F70000-memory.dmp
\Device\HarddiskVolume1\yUhWnJxWS.README.txt
| MD5 | a34fb07ce7696459f74aef7fefb56352 |
| SHA1 | dbd83ff37e90810eb57a802464ac5458ee092d5d |
| SHA256 | b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04 |
| SHA512 | 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8 |
Analysis: behavioral1
Detonation Overview
Submitted
2023-03-10 21:46
Reported
2023-03-10 21:48
Platform
win7-20230220-en
Max time kernel
31s
Max time network
33s
Command Line
Signatures
BlackMatter Ransomware
Modifies extensions of user files
| Description | Indicator | Process | Target |
| File renamed | C:\Users\Admin\Pictures\JoinUninstall.png => C:\Users\Admin\Pictures\JoinUninstall.png.uBBIsrJIE | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\JoinUninstall.png.uBBIsrJIE | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| File renamed | C:\Users\Admin\Pictures\SuspendMerge.png => C:\Users\Admin\Pictures\SuspendMerge.png.uBBIsrJIE | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| File opened for modification | C:\Users\Admin\Pictures\SuspendMerge.png.uBBIsrJIE | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop\WallPaper = "C:\\ProgramData\\uBBIsrJIE.bmp" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop\Wallpaper = "C:\\ProgramData\\uBBIsrJIE.bmp" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Suspicious use of NtSetInformationThreadHideFromDebugger
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Modifies Control Panel
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\Desktop\WallpaperStyle = "10" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\.uBBIsrJIE | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\.uBBIsrJIE\ = "uBBIsrJIE" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\uBBIsrJIE\DefaultIcon | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\uBBIsrJIE | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\uBBIsrJIE\DefaultIcon\ = "C:\\ProgramData\\uBBIsrJIE.ico" | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe | N/A |
Suspicious use of AdjustPrivilegeToken
Uses Volume Shadow Copy service COM API
Processes
C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe
"C:\Users\Admin\AppData\Local\Temp\BlackMatter.7a223a0aa0f88e84a68da.bin.exe"
C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
Network
Files
memory/1060-55-0x0000000002220000-0x0000000002260000-memory.dmp
memory/1060-56-0x0000000002220000-0x0000000002260000-memory.dmp
memory/1060-57-0x0000000002220000-0x0000000002260000-memory.dmp
C:\Users\uBBIsrJIE.README.txt
| MD5 | a34fb07ce7696459f74aef7fefb56352 |
| SHA1 | dbd83ff37e90810eb57a802464ac5458ee092d5d |
| SHA256 | b5497509edf9a86d80038354f2f07968785592be55ff779e573c776d85437e04 |
| SHA512 | 30b2a812bdb0c4caeccf542fe5c07e81c21c50d3211f4526bfba69b6473592577aebf7488c622167c7ffe5fd0cb5f4dfcf0c1d9795cd2416ad0509ac44c01ce8 |