Analysis Overview
SHA256
fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3
Threat Level: Known bad
The file fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3 was found to be: Known bad.
Malicious Activity Summary
Urelas family
Urelas
Deletes itself
Executes dropped EXE
Loads dropped DLL
Checks computer location settings
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Unsigned PE
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-05 05:39
Signatures
Urelas family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-05 05:39
Reported
2024-08-05 05:41
Platform
win7-20240708-en
Max time kernel
117s
Max time network
117s
Command Line
Signatures
Urelas
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:\Users\Admin\AppData\Local\Temp\biudfw.exe | N/A |
Loads dropped DLL
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\biudfw.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe
"C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe"
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
"C:\Users\Admin\AppData\Local\Temp\biudfw.exe"
C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\sanfdr.bat" "
Network
| Country | Destination | Domain | Proto |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| KR | 218.54.47.76:11170 | tcp | |
| KR | 218.54.47.77:11150 | tcp |
Files
memory/2372-0-0x0000000000920000-0x0000000000966000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | cb960aa88ae29f3e1ebd988977a4dc8d |
| SHA1 | eb2023e1ca869038e44218f368173396761fdfd0 |
| SHA256 | e4b14c97d5338a77835267f54a2c237bb83f9ef7610a4fe12b7561b37e9161d9 |
| SHA512 | c9eabb2000eabaafac5e2b3c75198df11baba6c86ea0bd7acbea058673ba3cfbbcdf5ce3cb101cf1f1c805b76e83505e93d70d1846e76919c5c7737e3690f9ae |
memory/2372-6-0x0000000001DF0000-0x0000000001E36000-memory.dmp
memory/2744-10-0x0000000001020000-0x0000000001066000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 37e6cd981b0e855d058d9b60ae0b2078 |
| SHA1 | f6fe4efa5e4a7f584b7c6aceb7618c41fa2ed0e5 |
| SHA256 | 8febbb34402fc2642eb69b80ce7b2658a701b51e4c8c59cca8eb40e00d2c6989 |
| SHA512 | 26460eb87498cf12615a5958ba568d26d9dec49a504745af06fd53c4d9e4bcca46d64003fdccbb3b3de8429a72fe3545d9192558a476bc257d1b1fc4fa9ba191 |
memory/2372-18-0x0000000000920000-0x0000000000966000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | ac5e84ed8031d66a9fcd5e472ba8091b |
| SHA1 | 06303add604104d6abbb69458f89773c066b470c |
| SHA256 | 3a3cfa6f4786dab0ac8bc76204948f32a3a2cbd094922f87c251ec80d22baae5 |
| SHA512 | 7bf829102a70a1304dae435b8ae3c9ef9a925af7e995fe381d80730f4f702e1fd2a0a1b6a3a4b4667925f5bb95c897166a8fc0f52d3171d9cdba0bf09b53f152 |
memory/2744-21-0x0000000001020000-0x0000000001066000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-05 05:39
Reported
2024-08-05 05:41
Platform
win10v2004-20240802-en
Max time kernel
93s
Max time network
94s
Command Line
Signatures
Urelas
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\biudfw.exe | N/A |
Enumerates physical storage devices
System Location Discovery: System Language Discovery
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Users\Admin\AppData\Local\Temp\biudfw.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language | C:\Windows\SysWOW64\cmd.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe
"C:\Users\Admin\AppData\Local\Temp\fd2b764bb57ea391ba5faf686914d5fc11ef5227ba71f101839df05bcc590cb3.exe"
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
"C:\Users\Admin\AppData\Local\Temp\biudfw.exe"
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\sanfdr.bat" "
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 55.36.223.20.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 56.126.166.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 192.142.123.92.in-addr.arpa | udp |
| KR | 218.54.47.76:11170 | tcp | |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| KR | 218.54.47.77:11150 | tcp | |
| US | 8.8.8.8:53 | 81.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
Files
memory/3600-0-0x0000000000900000-0x0000000000946000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | b75cd0b25e65a3cd629b300dce5e7eb3 |
| SHA1 | 4199cda5190827b6461fc163fab9c8785cb02a59 |
| SHA256 | ed6f1ae09cd067445280f47750e66d4e2fd81d4e3922ff0195d0c07e49c398db |
| SHA512 | 89b2c2d994229cc7b50cfbc80835d780e92c514445071e110ba711b1e56daa556bd9e2518a27e88bac1d57f6ff0552e62c593c19774e4abd241c45f1b1f76743 |
memory/1808-15-0x00000000009D0000-0x0000000000A16000-memory.dmp
memory/3600-17-0x0000000000900000-0x0000000000946000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 37e6cd981b0e855d058d9b60ae0b2078 |
| SHA1 | f6fe4efa5e4a7f584b7c6aceb7618c41fa2ed0e5 |
| SHA256 | 8febbb34402fc2642eb69b80ce7b2658a701b51e4c8c59cca8eb40e00d2c6989 |
| SHA512 | 26460eb87498cf12615a5958ba568d26d9dec49a504745af06fd53c4d9e4bcca46d64003fdccbb3b3de8429a72fe3545d9192558a476bc257d1b1fc4fa9ba191 |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | ac5e84ed8031d66a9fcd5e472ba8091b |
| SHA1 | 06303add604104d6abbb69458f89773c066b470c |
| SHA256 | 3a3cfa6f4786dab0ac8bc76204948f32a3a2cbd094922f87c251ec80d22baae5 |
| SHA512 | 7bf829102a70a1304dae435b8ae3c9ef9a925af7e995fe381d80730f4f702e1fd2a0a1b6a3a4b4667925f5bb95c897166a8fc0f52d3171d9cdba0bf09b53f152 |
memory/1808-20-0x00000000009D0000-0x0000000000A16000-memory.dmp