Analysis Overview
SHA256
3b904be4cc0e8cff559c2895974da1280b2667e69c53a2786935ddab52d94c30
Threat Level: Known bad
The file 8257b3861aa2159f9ea34cc03368892a was found to be: Known bad.
Malicious Activity Summary
Process spawned unexpected child process
Suspicious Office macro
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Enumerates system info in registry
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Modifies Internet Explorer settings
Checks processor information in registry
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2023-12-22 09:45
Signatures
Suspicious Office macro
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2023-12-22 09:45
Reported
2023-12-22 10:48
Platform
win10v2004-20231215-en
Max time kernel
150s
Max time network
154s
Command Line
Signatures
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process | N/A | C:\Windows\explorer.exe | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE |
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 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 |
| Key opened | \REGISTRY\MACHINE\Hardware\Description\System\BIOS | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3336304223-2978740688-3645194410-1000_Classes\Local Settings | C:\Windows\explorer.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 use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
| N/A | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4840 wrote to memory of 3340 | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | C:\Windows\explorer.exe |
| PID 4840 wrote to memory of 3340 | N/A | C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE | C:\Windows\explorer.exe |
| PID 2200 wrote to memory of 4632 | N/A | C:\Windows\explorer.exe | C:\Windows\System32\WScript.exe |
| PID 2200 wrote to memory of 4632 | N/A | C:\Windows\explorer.exe | C:\Windows\System32\WScript.exe |
Processes
C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\8257b3861aa2159f9ea34cc03368892a.xls"
C:\Windows\explorer.exe
explorer.exe C:\Users\Public\Documents\mzJB.vbs
C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Public\Documents\mzJB.vbs"
Network
| Country | Destination | Domain | Proto |
| US | 138.91.171.81:80 | tcp | |
| US | 8.8.8.8:53 | 19.53.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.89.109.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | markens.online | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 169.117.168.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 217.135.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 180.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
Files
memory/4840-0-0x00007FF927390000-0x00007FF9273A0000-memory.dmp
memory/4840-2-0x00007FF927390000-0x00007FF9273A0000-memory.dmp
memory/4840-1-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-5-0x00007FF927390000-0x00007FF9273A0000-memory.dmp
memory/4840-6-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-8-0x00007FF927390000-0x00007FF9273A0000-memory.dmp
memory/4840-10-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-12-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-14-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-16-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-18-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-19-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-17-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-22-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-23-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-20-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-21-0x00007FF924D70000-0x00007FF924D80000-memory.dmp
memory/4840-15-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-13-0x00007FF924D70000-0x00007FF924D80000-memory.dmp
memory/4840-11-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-9-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-7-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-4-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-3-0x00007FF927390000-0x00007FF9273A0000-memory.dmp
C:\Users\Public\Documents\mzJB.vbs
| MD5 | b3f5658760806a06c4d4cbb43c7672cb |
| SHA1 | fa3b750a3111831af293feefa3305b638887a7ec |
| SHA256 | a436c5b0e421e5721ba5b49b9b62ef0bab4ebe5d1ea44ee6d8ca76c983a4540b |
| SHA512 | bea8264a12f3a35f3cf419cb597f1c716089cf1ac8cfc00ab31876a002db5fe7c564adc4d917bfaefb1a23c290ad23e61779519141a02980759022fc786c1338 |
memory/4840-35-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-36-0x00007FF967310000-0x00007FF967505000-memory.dmp
memory/4840-37-0x00007FF967310000-0x00007FF967505000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2023-12-22 09:45
Reported
2023-12-22 10:49
Platform
win7-20231215-en
Max time kernel
0s
Max time network
120s
Command Line
Signatures
Process spawned unexpected child process
| Description | Indicator | Process | Target |
| Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process | N/A | C:\Windows\SysWOW64\rundll32.exe | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE |
Modifies Internet Explorer settings
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Internet Explorer\MenuExt | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105" | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE | N/A |
| Set value (int) | \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55" | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Internet Explorer\Toolbar | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3818056530-936619650-3554021955-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes" | C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE | N/A |
Processes
C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\8257b3861aa2159f9ea34cc03368892a.xls
C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Users\Public\Documents\Vuuf0.txt,DllRegisterServer
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | markens.online | udp |
Files
memory/2492-1-0x000000007257D000-0x0000000072588000-memory.dmp
memory/2492-0-0x000000005FFF0000-0x0000000060000000-memory.dmp
memory/2492-2-0x000000007257D000-0x0000000072588000-memory.dmp
memory/2492-3-0x000000005FFF0000-0x0000000060000000-memory.dmp
memory/2492-4-0x000000007257D000-0x0000000072588000-memory.dmp