Analysis Overview
SHA256
daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae
Threat Level: Known bad
The file daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae was found to be: Known bad.
Malicious Activity Summary
UPX dump on OEP (original entry point)
Detects Windows executables referencing non-Windows User-Agents
Detects Windows executables referencing non-Windows User-Agents
UPX dump on OEP (original entry point)
Sets file to hidden
UPX packed file
Checks computer location settings
Deletes itself
Executes dropped EXE
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Views/modifies file attributes
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-06-01 04:01
Signatures
Detects Windows executables referencing non-Windows User-Agents
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
UPX dump on OEP (original entry point)
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
UPX packed file
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-01 04:01
Reported
2024-06-01 04:04
Platform
win7-20240508-en
Max time kernel
144s
Max time network
144s
Command Line
Signatures
Detects Windows executables referencing non-Windows User-Agents
| 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 |
UPX dump on OEP (original entry point)
| 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 |
Sets file to hidden
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Deletes itself
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\cmd.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Debug\ayahost.exe | N/A |
UPX packed file
| 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 |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\Debug\ayahost.exe | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
| File opened for modification | C:\Windows\Debug\ayahost.exe | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
| File opened for modification | C:\Windows\Debug\ayahost.exe | C:\Windows\SysWOW64\attrib.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
Suspicious use of WriteProcessMemory
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe
"C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe"
C:\Windows\SysWOW64\attrib.exe
attrib +a +s +h +r C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
C:\Windows\Debug\ayahost.exe
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\DACA4D~1.EXE > nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | www.baidu.com | udp |
| CN | 183.240.99.24:80 | www.baidu.com | tcp |
| US | 8.8.8.8:53 | p03yIxkQ1T.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | PCk3REXF.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | zsRLLPhfzP.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | ZYcXctHid.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | 9FJiNqePSL.nnnn.eu.org | udp |
Files
memory/836-0-0x0000000000400000-0x0000000000416000-memory.dmp
C:\Windows\Debug\ayahost.exe
| MD5 | e16ff1cb124edb1059a7736d237b7a08 |
| SHA1 | 4933f98db82e6988253ac52112f6fd427a8fb27f |
| SHA256 | 872877acfad650f0d9d97fbe48f1656feb49b09306fb74de05abc7e589585856 |
| SHA512 | ecfb3f84f5595830470dc49ea3b8a513126c42e1435fe2ebaed80a8233c8ef78816be6ce2755d98a935cb651e9ae72bff596b8224bb21031fd09746ea6cd43ee |
memory/836-5-0x0000000000400000-0x0000000000416000-memory.dmp
memory/2132-6-0x0000000000400000-0x0000000000416000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-06-01 04:01
Reported
2024-06-01 04:04
Platform
win10v2004-20240508-en
Max time kernel
144s
Max time network
145s
Command Line
Signatures
Detects Windows executables referencing non-Windows User-Agents
| 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 |
UPX dump on OEP (original entry point)
| 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 |
Sets file to hidden
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\Debug\egkhost.exe | N/A |
UPX packed file
| 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 |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\Debug\egkhost.exe | C:\Windows\SysWOW64\attrib.exe | N/A |
| File created | C:\Windows\Debug\egkhost.exe | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
| File opened for modification | C:\Windows\Debug\egkhost.exe | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
Enumerates physical storage devices
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeIncBasePriorityPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe | N/A |
Suspicious use of WriteProcessMemory
Views/modifies file attributes
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\attrib.exe | N/A |
Processes
C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe
"C:\Users\Admin\AppData\Local\Temp\daca4dfea716ff4d698330910a45df0cb0697c7910f0197a3be30797014b5dae.exe"
C:\Windows\SysWOW64\attrib.exe
attrib +a +s +h +r C:\Windows\Debug\egkhost.exe
C:\Windows\Debug\egkhost.exe
C:\Windows\Debug\egkhost.exe
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\DACA4D~1.EXE > nul
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 241.150.49.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | www.baidu.com | udp |
| CN | 183.240.99.24:80 | www.baidu.com | tcp |
| NL | 23.62.61.97:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 97.61.62.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | p03yIxkQ1T.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | S2slQlQKZ1.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | 82.90.14.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2j3whjuSIF.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | cvk8TDN42T.nnnn.eu.org | udp |
| US | 8.8.8.8:53 | CbwJkrm.nnnn.eu.org | udp |
Files
memory/800-0-0x0000000000400000-0x0000000000416000-memory.dmp
C:\Windows\Debug\egkhost.exe
| MD5 | 7cfc923037eb277c91f139e3f2540c99 |
| SHA1 | 6837710d5ae670183571ad9b75c71565e7811f3d |
| SHA256 | 992b723ade16bab81e8fa91ea7355594526f4c64fa90db254d653e61e55f987b |
| SHA512 | 1164e33db39c94fdf399d27aa8e8f34189e21af4129eb222eca2e72710d7a5324cc82052f7db6e76c77b9c9aa2e67b974edd29141a43c74a059909c15f36addc |
memory/800-5-0x0000000000400000-0x0000000000416000-memory.dmp
memory/1364-6-0x0000000000400000-0x0000000000416000-memory.dmp