Analysis Overview
SHA256
7e45b79940116f8a1de3a75f82e5209d0279d99479a24778e1590dd739b6ddf8
Threat Level: Known bad
The file dead.payload was found to be: Known bad.
Malicious Activity Summary
Detect Umbral payload
Umbral
Umbral family
Unsigned PE
Checks processor information in registry
Opens file in notepad (likely ransom note)
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates system info in registry
Modifies registry class
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-07-11 16:44
Signatures
Detect Umbral payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Umbral family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-07-11 16:44
Reported
2024-07-11 16:45
Platform
win10v2004-20240709-en
Max time kernel
30s
Max time network
15s
Command Line
Signatures
Detect Umbral payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Umbral
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
Enumerates system info in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1176886754-713327781-2233697964-1000_Classes\Local Settings | C:\Windows\system32\OpenWith.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:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\OpenWith.exe | N/A |
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3832 wrote to memory of 3864 | N/A | C:\Windows\system32\OpenWith.exe | C:\Windows\system32\NOTEPAD.EXE |
| PID 3832 wrote to memory of 3864 | N/A | C:\Windows\system32\OpenWith.exe | C:\Windows\system32\NOTEPAD.EXE |
Processes
C:\Users\Admin\AppData\Local\Temp\dead.exe
"C:\Users\Admin\AppData\Local\Temp\dead.exe"
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\Desktop\CompleteStop.xlsx"
C:\Windows\system32\OpenWith.exe
C:\Windows\system32\OpenWith.exe -Embedding
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\CompressCopy.pcx
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 84.177.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 25.140.123.92.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.76.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 92.16.208.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | udp | |
| N/A | 20.114.59.183:443 | tcp |
Files
memory/552-0-0x000001CFD6160000-0x000001CFD61A6000-memory.dmp
memory/552-1-0x00007FFA08DB3000-0x00007FFA08DB5000-memory.dmp
memory/552-2-0x00007FFA08DB0000-0x00007FFA09871000-memory.dmp
memory/552-3-0x00007FFA08DB0000-0x00007FFA09871000-memory.dmp
memory/3076-4-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-6-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-5-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-7-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-8-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-9-0x00007FFA08C90000-0x00007FFA08F60000-memory.dmp
memory/3076-10-0x00007FF9E4C40000-0x00007FF9E4C50000-memory.dmp
memory/3076-11-0x00007FFA08C90000-0x00007FFA08F60000-memory.dmp
memory/3076-12-0x00007FF9E4C40000-0x00007FF9E4C50000-memory.dmp
memory/3076-13-0x00007FFA08C90000-0x00007FFA08F60000-memory.dmp
memory/3076-14-0x00007FFA08C90000-0x00007FFA08F60000-memory.dmp
memory/3076-15-0x00007FFA08C90000-0x00007FFA08F60000-memory.dmp
C:\Users\Admin\AppData\Roaming\Microsoft\Office\Recent\index.dat
| MD5 | ab7d2c1cbbc2d7b4f7e5bb1c8c6ea2bb |
| SHA1 | 3d371c9c52babc38d75ffbb6c2b7a2166a712e89 |
| SHA256 | 871bc318ff1901a0c531c49cb2cfcfe20356910e06d962db53b1d9f9cbb6e25f |
| SHA512 | 3f10a61d85dc0f659fbf250442ad141e2093ce18316e3868d3bd2fda8e02075b0cd32a02e38d4a2789efe256a2cd339e838408cecab5483fee462b11a4f07a5f |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms
| MD5 | d7570734da99e97b5b1f9c0ed769f219 |
| SHA1 | b5c70e166289dba00275d3c5ec2f93c0be273089 |
| SHA256 | c4cbff22972713643c29c6751d82cf167e5623d6098e184cec217c2c86721e92 |
| SHA512 | e1cd99aeead32b449f361cf216a7ff2734ed7bbf31207d0e7f6de1c773fb7efcb9c344f29abb275a9686a930f246290d66631e97831582a50922bc0c1e9dff48 |
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms
| MD5 | 244fc07e9d3169e926525db86974cb59 |
| SHA1 | 600e2e6c0af8ccdd9949b4aa8d68bec5d64a2a72 |
| SHA256 | f36dcab0e40f5d88dbc2e0cf8f6e6f5934494e450da8d5157a182eb99c7f8b2f |
| SHA512 | 16ee5ee69853343c35a16ced5fbbbcff6ad65fe6dbc7c5fc8df0bf4812be62e6a4a9b949645dcf41d5c38ebfe24002d47abf8781413733d2817e9875a290cb56 |
memory/3076-60-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-59-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-63-0x00007FFA08C90000-0x00007FFA08F60000-memory.dmp
memory/3076-62-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
memory/3076-61-0x00007FF9E71F0000-0x00007FF9E7200000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-07-11 16:44
Reported
2024-07-11 16:45
Platform
win7-20240708-en
Max time kernel
23s
Max time network
16s
Command Line
Signatures
Detect Umbral payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Umbral
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 2988 wrote to memory of 3056 | N/A | C:\Users\Admin\AppData\Local\Temp\dead.exe | C:\Windows\system32\WerFault.exe |
| PID 2988 wrote to memory of 3056 | N/A | C:\Users\Admin\AppData\Local\Temp\dead.exe | C:\Windows\system32\WerFault.exe |
| PID 2988 wrote to memory of 3056 | N/A | C:\Users\Admin\AppData\Local\Temp\dead.exe | C:\Windows\system32\WerFault.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\dead.exe
"C:\Users\Admin\AppData\Local\Temp\dead.exe"
C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 2988 -s 544
Network
Files
memory/2988-0-0x000007FEF5C93000-0x000007FEF5C94000-memory.dmp
memory/2988-1-0x0000000000F60000-0x0000000000FA6000-memory.dmp
memory/2988-2-0x000007FEF5C93000-0x000007FEF5C94000-memory.dmp