Analysis Overview
SHA256
4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb
Threat Level: Known bad
The file 4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb was found to be: Known bad.
Malicious Activity Summary
Urelas
Deletes itself
Loads dropped DLL
Checks computer location settings
Executes dropped EXE
Unsigned PE
System Location Discovery: System Language Discovery
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-10-10 21:11
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-10-10 21:11
Reported
2024-10-10 21:13
Platform
win7-20240903-en
Max time kernel
122s
Max time network
123s
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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.exe
"C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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/2668-0-0x00000000000D0000-0x00000000000F5000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | f91e2914dcffa569fe8aed57f8d9f577 |
| SHA1 | 03c9b2d94145768fd17269d3a3d24be4cdc899ac |
| SHA256 | 734c2bb0ba406ef754ca25bf0761fa203e4267a5fc3ba4c28f5e2245f6ecff74 |
| SHA512 | d3a9b5bcc6f3aff9a08930cacc600b782630a66a13e7d13c18e3a076b795caa3f409c8dc07b450326107a2438a1fedf1e26b041ab99079fbc86200bbd6a371a9 |
memory/2712-10-0x0000000000B40000-0x0000000000B65000-memory.dmp
memory/2668-9-0x0000000000430000-0x0000000000455000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 81636de2e91f2cf944a42f5849c54575 |
| SHA1 | f5d5fe65461deabd03da16d528c7ccace6557c73 |
| SHA256 | 5a8e87ab4a66938bdab75b6aa5d0cec15c528d3d1f11d50759ca7e01730bb66d |
| SHA512 | 34f07e2a439e36cd4282b62fc10d1b9f80468525f1b138b7405eb2bf4381ee9c99e936ee33977fe6a96b915b484cd7599fc8c393f7402f3227e6ece321449ea0 |
memory/2668-19-0x00000000000D0000-0x00000000000F5000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | efd90b3ac908d5482af367de3a82184a |
| SHA1 | de9f01d2ed0247b7b347e55c5a09721a60147fb9 |
| SHA256 | 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d |
| SHA512 | 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02 |
memory/2712-22-0x0000000000B40000-0x0000000000B65000-memory.dmp
memory/2712-24-0x0000000000B40000-0x0000000000B65000-memory.dmp
memory/2712-31-0x0000000000B40000-0x0000000000B65000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-10-10 21:11
Reported
2024-10-10 21:13
Platform
win10v2004-20241007-en
Max time kernel
93s
Max time network
149s
Command Line
Signatures
Urelas
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.exe
"C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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 | 150.171.28.10:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 74.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.28.171.150.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 83.210.23.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| US | 8.8.8.8:53 | 197.87.175.4.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.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 | 103.209.201.84.in-addr.arpa | udp |
| KR | 218.54.47.77:11150 | tcp | |
| US | 8.8.8.8:53 | 68.209.201.84.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
Files
memory/1256-0-0x00000000006B0000-0x00000000006D5000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 202ad29db50bca07779982ad64d8fb67 |
| SHA1 | 9da41c94a5d7e044b13807950ce4fd3bd9beefe5 |
| SHA256 | 89418cf141d72fd8d2069cbf34a44d175db65f5185e6e820f0a4c16d9ed5f7a7 |
| SHA512 | dfd5d9d261ac0ceb6d3e3603fe9f8cc6100a247f1e70203083feb8742f077090d163e65ab1b3ec6a7f593c7bee51164d53f7bdacb4bfa547c424368a5849f4fa |
memory/1868-15-0x00000000002E0000-0x0000000000305000-memory.dmp
memory/1256-17-0x00000000006B0000-0x00000000006D5000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 81636de2e91f2cf944a42f5849c54575 |
| SHA1 | f5d5fe65461deabd03da16d528c7ccace6557c73 |
| SHA256 | 5a8e87ab4a66938bdab75b6aa5d0cec15c528d3d1f11d50759ca7e01730bb66d |
| SHA512 | 34f07e2a439e36cd4282b62fc10d1b9f80468525f1b138b7405eb2bf4381ee9c99e936ee33977fe6a96b915b484cd7599fc8c393f7402f3227e6ece321449ea0 |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | efd90b3ac908d5482af367de3a82184a |
| SHA1 | de9f01d2ed0247b7b347e55c5a09721a60147fb9 |
| SHA256 | 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d |
| SHA512 | 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02 |
memory/1868-20-0x00000000002E0000-0x0000000000305000-memory.dmp
memory/1868-22-0x00000000002E0000-0x0000000000305000-memory.dmp
memory/1868-29-0x00000000002E0000-0x0000000000305000-memory.dmp