Analysis Overview
SHA256
caa35807916b5fbe3e9a93757753a4512712377ad0a25d1109d6937df96b4a6b
Threat Level: Known bad
The file 48a121356fc7b3917d788e1d02440d50N.exe was found to be: Known bad.
Malicious Activity Summary
Urelas
Deletes itself
Loads dropped DLL
Executes dropped EXE
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 04:12
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-05 04:12
Reported
2024-08-05 04:14
Platform
win10v2004-20240802-en
Max time kernel
93s
Max time network
112s
Command Line
Signatures
Urelas
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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\48a121356fc7b3917d788e1d02440d50N.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
| Description | Indicator | Process | Target |
| PID 2144 wrote to memory of 2428 | N/A | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 2144 wrote to memory of 2428 | N/A | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 2144 wrote to memory of 2428 | N/A | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 2144 wrote to memory of 1364 | N/A | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2144 wrote to memory of 1364 | N/A | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 2144 wrote to memory of 1364 | N/A | C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe
"C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.36.159.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| KR | 218.54.47.76:11170 | tcp | |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| KR | 218.54.47.77:11150 | tcp | |
| US | 8.8.8.8:53 | 29.243.111.52.in-addr.arpa | udp |
Files
memory/2144-0-0x0000000000D40000-0x0000000000D65000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | f987e3244df28776c72de09f3bacdfe7 |
| SHA1 | dd4f1fce9a5f401650ea2a2ade198dffe908be1d |
| SHA256 | 9eda949b6714895dbeac414fb1c66e96c1f8dfe5dd3d1621991d32d3bb22972a |
| SHA512 | 87d7d08312593811d82b39af3e5716d44da206f5df49e40085444252d251b7c36947f06a70eb4f40eb2e39e49358d2e862e457940a8dc634cd7358c6db7a2d09 |
memory/2428-15-0x0000000000A10000-0x0000000000A35000-memory.dmp
memory/2144-18-0x0000000000D40000-0x0000000000D65000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 779d135e91fe6dca8ef63dd843c2929a |
| SHA1 | 647be14c8bfac66ed294cb40963f0202fdf1af69 |
| SHA256 | 6a3f5bc5cf37fbf041deab1a056c7fca16be3891ead0ae353295b0ce0f017dc3 |
| SHA512 | 19365c8364cd1a3d5109d8b0b6eb5275e0febd063500097dfc9ced7d5259feea3a107b0fbbfed0232bdf8bb07bc53e01d0e8839b9f8d8daf60d448c85f897ab6 |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | efd90b3ac908d5482af367de3a82184a |
| SHA1 | de9f01d2ed0247b7b347e55c5a09721a60147fb9 |
| SHA256 | 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d |
| SHA512 | 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02 |
memory/2428-21-0x0000000000A10000-0x0000000000A35000-memory.dmp
memory/2428-23-0x0000000000A10000-0x0000000000A35000-memory.dmp
memory/2428-30-0x0000000000A10000-0x0000000000A35000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-05 04:12
Reported
2024-08-05 04:14
Platform
win7-20240705-en
Max time kernel
90s
Max time network
95s
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\48a121356fc7b3917d788e1d02440d50N.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\biudfw.exe | N/A |
| 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\48a121356fc7b3917d788e1d02440d50N.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe
"C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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/1440-0-0x0000000000120000-0x0000000000145000-memory.dmp
memory/1440-6-0x0000000000410000-0x0000000000435000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 3990afdb8520ebbc38b595db1122a276 |
| SHA1 | 4dbaa80d9742b0a184481b82fa89d98b84006017 |
| SHA256 | 175a3071d9703a9edf83d710c8c579c6da830fe57d616615648e4a9c2e0ba376 |
| SHA512 | 54ef3c940fc486d1030bf7cc285363724d293885455b913a4a13e7338847e5cace4ddfa8bcebcd255f7c867c0e8a2046867dde720fff7ee31211f6071b3952de |
memory/1120-10-0x0000000000940000-0x0000000000965000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 779d135e91fe6dca8ef63dd843c2929a |
| SHA1 | 647be14c8bfac66ed294cb40963f0202fdf1af69 |
| SHA256 | 6a3f5bc5cf37fbf041deab1a056c7fca16be3891ead0ae353295b0ce0f017dc3 |
| SHA512 | 19365c8364cd1a3d5109d8b0b6eb5275e0febd063500097dfc9ced7d5259feea3a107b0fbbfed0232bdf8bb07bc53e01d0e8839b9f8d8daf60d448c85f897ab6 |
memory/1440-18-0x0000000000120000-0x0000000000145000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | efd90b3ac908d5482af367de3a82184a |
| SHA1 | de9f01d2ed0247b7b347e55c5a09721a60147fb9 |
| SHA256 | 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d |
| SHA512 | 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02 |
memory/1120-21-0x0000000000940000-0x0000000000965000-memory.dmp
memory/1120-23-0x0000000000940000-0x0000000000965000-memory.dmp
memory/1120-29-0x0000000000940000-0x0000000000965000-memory.dmp