Analysis Overview
SHA256
d620b15623bb352588dbe7e71ed15be7018750380cf5670c0acfec5612b28d9c
Threat Level: Known bad
The file 59f0820e1dba93f32143edd3016243e0N.exe was found to be: Known bad.
Malicious Activity Summary
Urelas
Executes dropped EXE
Checks computer location settings
Deletes itself
Loads dropped DLL
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
2024-08-01 08:32
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-01 08:32
Reported
2024-08-01 08:34
Platform
win7-20240708-en
Max time kernel
118s
Max time network
119s
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\59f0820e1dba93f32143edd3016243e0N.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\59f0820e1dba93f32143edd3016243e0N.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\59f0820e1dba93f32143edd3016243e0N.exe
"C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.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/2884-0-0x0000000000400000-0x0000000000428000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | c2cb93e3639a64143083587638c6e338 |
| SHA1 | 53c8de35d70106933273c7d9b3f654adc51f9ea4 |
| SHA256 | b10fcbaf133620dabc22f4b949c7676983090356a0f02cfe856021494722dbfc |
| SHA512 | 8625873433d792f0c316dfb24f740d961af41212817dac30c18cb7b4681ddf37e4606796ed1be5056649dbe418bdbf94c31fe1b8e4716bd3633f309bef323a30 |
memory/2884-6-0x00000000033F0000-0x0000000003418000-memory.dmp
memory/2884-18-0x0000000000400000-0x0000000000428000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 81e05de602affcce0df5ebb80d5cb29d |
| SHA1 | ee5f67f6d7fb476030780f50dd92ea78f6871b88 |
| SHA256 | 8e942d9a670d8961bab18fa7ec93182ddaf9fcf31bf306f7268f079cea1a21ad |
| SHA512 | 43525dd191f61167d10999178edf440966dcf5fc0558043df17cf19f7588d25071231ed76430f57fca0efd4815e994939708a2e57659dd46e3416ac1732d37aa |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | b4a86880004da8726288d7ec954885a8 |
| SHA1 | 1bab1cfbdc2c540246210bc7852f8fe7e8357b31 |
| SHA256 | c85016a9115aeb492bf116ab05791a9c3e6e30c39274767bd0476bd56a37db46 |
| SHA512 | 22758f6c6de591c99f8f9857c1b03e55c242f0a4987d376b08c30bc608027d1574a228a8230099ddac2a3214663396b016e85d085204155a5ec26f87a28496b4 |
memory/2212-21-0x0000000000400000-0x0000000000428000-memory.dmp
memory/2212-23-0x0000000000400000-0x0000000000428000-memory.dmp
memory/2212-30-0x0000000000400000-0x0000000000428000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-01 08:32
Reported
2024-08-01 08:34
Platform
win10v2004-20240730-en
Max time kernel
94s
Max time network
95s
Command Line
Signatures
Urelas
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2951562807-3718269429-4208157415-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.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\59f0820e1dba93f32143edd3016243e0N.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 1568 wrote to memory of 1824 | N/A | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 1568 wrote to memory of 1824 | N/A | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 1568 wrote to memory of 1824 | N/A | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 1568 wrote to memory of 3188 | N/A | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1568 wrote to memory of 3188 | N/A | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 1568 wrote to memory of 3188 | N/A | C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.exe
"C:\Users\Admin\AppData\Local\Temp\59f0820e1dba93f32143edd3016243e0N.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 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 73.144.22.2.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 | 15.164.165.52.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 | 22.58.20.217.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/1568-0-0x0000000000400000-0x0000000000428000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 91db822d1924cef9326148745ce7e5d5 |
| SHA1 | 3abd2f8c437c2f271222ab0dcf124e5c3738b544 |
| SHA256 | 1eb29042bf24eaa44702c94866242aa49b11b16b599e29543e3646d780c78512 |
| SHA512 | 48cf91f7909485ef11668f394e77b65c9042c5f7b4239aee83908e0070279f9f01677d923f3bd1a33fb9db573c876fe4c18b8e684825f0bfd742bd7c0b376ad1 |
memory/1824-12-0x0000000000400000-0x0000000000428000-memory.dmp
memory/1568-15-0x0000000000400000-0x0000000000428000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 81e05de602affcce0df5ebb80d5cb29d |
| SHA1 | ee5f67f6d7fb476030780f50dd92ea78f6871b88 |
| SHA256 | 8e942d9a670d8961bab18fa7ec93182ddaf9fcf31bf306f7268f079cea1a21ad |
| SHA512 | 43525dd191f61167d10999178edf440966dcf5fc0558043df17cf19f7588d25071231ed76430f57fca0efd4815e994939708a2e57659dd46e3416ac1732d37aa |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | b4a86880004da8726288d7ec954885a8 |
| SHA1 | 1bab1cfbdc2c540246210bc7852f8fe7e8357b31 |
| SHA256 | c85016a9115aeb492bf116ab05791a9c3e6e30c39274767bd0476bd56a37db46 |
| SHA512 | 22758f6c6de591c99f8f9857c1b03e55c242f0a4987d376b08c30bc608027d1574a228a8230099ddac2a3214663396b016e85d085204155a5ec26f87a28496b4 |
memory/1824-18-0x0000000000400000-0x0000000000428000-memory.dmp
memory/1824-20-0x0000000000400000-0x0000000000428000-memory.dmp
memory/1824-27-0x0000000000400000-0x0000000000428000-memory.dmp