Analysis Overview
SHA256
a5edeb3512a3d9cad63a6ada9266e2638dc9f5db18801f90e1ccf733515ca685
Threat Level: Shows suspicious behavior
The file dc50efff91d40071e26ffb7491605844 was found to be: Shows suspicious behavior.
Malicious Activity Summary
Loads dropped DLL
Installs/modifies Browser Helper Object
Drops file in System32 directory
Unsigned PE
Modifies registry class
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-21 18:29
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-21 18:29
Reported
2024-03-21 18:31
Platform
win7-20240220-en
Max time kernel
118s
Max time network
118s
Command Line
Signatures
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{C68B0149-C717-4041-BF00-C21569B97019} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\windownewsups.ini | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | N/A |
| File created | C:\Windows\SysWOW64\hfeoqxsdnfxjl.dll | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\InprocServer32 | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\InprocServer32\ = "C:\\Windows\\SysWow64\\hfeoqxsdnfxjl.dll" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\hfeoqxsdnfxjl.IEExtend | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\hfeoqxsdnfxjl.IEExtend\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\hfeoqxsdnfxjl.IEExtend\Clsid | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\ProgID | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\ProgID\ = "hfeoqxsdnfxjl.IEExtend" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\hfeoqxsdnfxjl.IEExtend\Clsid\ = "{C68B0149-C717-4041-BF00-C21569B97019}" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe
"C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe"
C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32.exe /s C:\Windows\system32\hfeoqxsdnfxjl.dll
Network
Files
memory/2080-0-0x0000000000400000-0x0000000000469000-memory.dmp
memory/2080-1-0x0000000000220000-0x0000000000222000-memory.dmp
C:\Windows\SysWOW64\hfeoqxsdnfxjl.dll
| MD5 | b11a7476b7aeca348fe33d6242b465da |
| SHA1 | e7e72254097a2a9b08fa7d64789ca665bdfa3a96 |
| SHA256 | 9ff6d68518c09f6d454370c50fa4e97143c9824fa370790d3de933429c45c4dc |
| SHA512 | 32af36f020107b66c05eecd4a203e438183a0eae0772fdbd181adfaa3ef00744d180f6768da2eabc2749fbecc8b84a38de078fd407a7873ca9345fb9ccb10008 |
memory/1984-6-0x00000000001D0000-0x0000000000270000-memory.dmp
memory/1984-7-0x0000000000170000-0x0000000000172000-memory.dmp
memory/2080-8-0x0000000000400000-0x0000000000469000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-21 18:29
Reported
2024-03-21 18:31
Platform
win10v2004-20231215-en
Max time kernel
93s
Max time network
145s
Command Line
Signatures
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Installs/modifies Browser Helper Object
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{C68B0149-C717-4041-BF00-C21569B97019} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Drops file in System32 directory
| Description | Indicator | Process | Target |
| File created | C:\Windows\SysWOW64\windownewsups.ini | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | N/A |
| File created | C:\Windows\SysWOW64\dpahbzgbnuchd.dll | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019} | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\InprocServer32\ = "C:\\Windows\\SysWow64\\dpahbzgbnuchd.dll" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\dpahbzgbnuchd.IEExtend\Clsid\ = "{C68B0149-C717-4041-BF00-C21569B97019}" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\ProgID\ = "dpahbzgbnuchd.IEExtend" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\dpahbzgbnuchd.IEExtend\Clsid | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\ProgID | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\InprocServer32 | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C68B0149-C717-4041-BF00-C21569B97019}\InprocServer32\ThreadingModel = "Apartment" | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Key created | \REGISTRY\MACHINE\SOFTWARE\Classes\dpahbzgbnuchd.IEExtend | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
| Set value (str) | \REGISTRY\MACHINE\SOFTWARE\Classes\dpahbzgbnuchd.IEExtend\ | C:\Windows\SysWOW64\Regsvr32.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 956 wrote to memory of 3404 | N/A | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | C:\Windows\SysWOW64\Regsvr32.exe |
| PID 956 wrote to memory of 3404 | N/A | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | C:\Windows\SysWOW64\Regsvr32.exe |
| PID 956 wrote to memory of 3404 | N/A | C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe | C:\Windows\SysWOW64\Regsvr32.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe
"C:\Users\Admin\AppData\Local\Temp\dc50efff91d40071e26ffb7491605844.exe"
C:\Windows\SysWOW64\Regsvr32.exe
Regsvr32.exe /s C:\Windows\system32\dpahbzgbnuchd.dll
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 79.121.231.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 196.249.167.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 128.227.79.178.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 81.179.17.96.in-addr.arpa | udp |
Files
memory/956-0-0x0000000000400000-0x0000000000469000-memory.dmp
memory/956-1-0x0000000000610000-0x0000000000612000-memory.dmp
C:\Windows\SysWOW64\dpahbzgbnuchd.dll
| MD5 | b11a7476b7aeca348fe33d6242b465da |
| SHA1 | e7e72254097a2a9b08fa7d64789ca665bdfa3a96 |
| SHA256 | 9ff6d68518c09f6d454370c50fa4e97143c9824fa370790d3de933429c45c4dc |
| SHA512 | 32af36f020107b66c05eecd4a203e438183a0eae0772fdbd181adfaa3ef00744d180f6768da2eabc2749fbecc8b84a38de078fd407a7873ca9345fb9ccb10008 |
memory/3404-8-0x0000000001FC0000-0x0000000002060000-memory.dmp
memory/3404-7-0x0000000001FC0000-0x0000000002060000-memory.dmp
memory/3404-9-0x0000000000480000-0x0000000000482000-memory.dmp
memory/956-10-0x0000000000400000-0x0000000000469000-memory.dmp