Analysis Overview
SHA256
4beed96c08ad1d96cc0ff51824516df57f4c89bbbfb9871d927a212ce4e515f6
Threat Level: Known bad
The file f87e5eddb3eda809b99172e27a87d780N.exe was found to be: Known bad.
Malicious Activity Summary
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
2024-08-04 19:18
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-04 19:18
Reported
2024-08-04 19:20
Platform
win7-20240708-en
Max time kernel
119s
Max time network
78s
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\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.exe
"C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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/2348-0-0x0000000000860000-0x0000000000887000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | d377769221221b5a0f511ca4ca0937f9 |
| SHA1 | 1230bae19be680b4ac964e29f39b9f19af8e04c6 |
| SHA256 | 1fcd20cf407243b33afc8eaecee206098daad693955a8cd3b0aa827fb604cb2c |
| SHA512 | 667574792c916485a495114f9f2da875b4448d39a48144d1ffe58fe08521c5713c06993c847fba9c806ab1dec22f9ffe358b3a2107419c57cc187c10462925c9 |
memory/2348-8-0x0000000000830000-0x0000000000857000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 6fc0c05cabe218158b4741328fb67ad5 |
| SHA1 | 6521a3064345d741674afb7ec89607e3968c715b |
| SHA256 | e1ff8b4e5b970ba9b9ea37ae911dac4131da0e4973ca47811c9a7b54e047a37c |
| SHA512 | 805e847b7da572a72f30a9c7a1640eddf062ca6829964bf48ca82c4fa4db3bc81896579c00e4bda8b118a2162e5e8d961248210d415db59be962231074230b1b |
memory/2348-19-0x0000000000860000-0x0000000000887000-memory.dmp
memory/3032-17-0x0000000000990000-0x00000000009B7000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | 1c9b2720af0ca9528b47898d9c7f4799 |
| SHA1 | 80495f16e333f54ecc700252323c2a7cb7d751e1 |
| SHA256 | d1ea9a17b5a635a121e82e7963d3b134f74050da9debcd40c9622f50c5d38fe5 |
| SHA512 | 5afe876f2cd887458656b1747bce08d03f26ef286bcc83efa93e0111be856d0564bee4d6ef5637c167626bac121f7371b69c7952502d47784ac9ad568bf53eac |
memory/3032-22-0x0000000000990000-0x00000000009B7000-memory.dmp
memory/3032-24-0x0000000000990000-0x00000000009B7000-memory.dmp
memory/3032-31-0x0000000000990000-0x00000000009B7000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-04 19:18
Reported
2024-08-04 19:20
Platform
win10v2004-20240802-en
Max time kernel
92s
Max time network
101s
Command Line
Signatures
Urelas
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.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 4636 wrote to memory of 3468 | N/A | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 4636 wrote to memory of 3468 | N/A | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 4636 wrote to memory of 3468 | N/A | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 4636 wrote to memory of 232 | N/A | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4636 wrote to memory of 232 | N/A | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4636 wrote to memory of 232 | N/A | C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe
"C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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 | 240.221.184.93.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 24.58.20.217.in-addr.arpa | udp |
| KR | 218.54.47.76:11170 | tcp | |
| KR | 218.54.47.77:11150 | tcp |
Files
memory/4636-0-0x0000000000E50000-0x0000000000E77000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 3aa2a6b21974f4b5e54c9af3f9e95ea4 |
| SHA1 | 972c37b024aca222cd3f229b9dbe379e0ba57292 |
| SHA256 | a1dcd1fc041d13f836e95f7d4047693895008575eb47ece8f11c348ea62d8ee6 |
| SHA512 | 827d6ad87052fab15973807c397b46cc4454e072a3b9ed484720eb0c450d79d7e67b285c766c504034cf00ce3abf81e3064abf9126b569c59dd5fb3cf682b339 |
memory/3468-15-0x0000000000650000-0x0000000000677000-memory.dmp
memory/4636-18-0x0000000000E50000-0x0000000000E77000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 6fc0c05cabe218158b4741328fb67ad5 |
| SHA1 | 6521a3064345d741674afb7ec89607e3968c715b |
| SHA256 | e1ff8b4e5b970ba9b9ea37ae911dac4131da0e4973ca47811c9a7b54e047a37c |
| SHA512 | 805e847b7da572a72f30a9c7a1640eddf062ca6829964bf48ca82c4fa4db3bc81896579c00e4bda8b118a2162e5e8d961248210d415db59be962231074230b1b |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | 1c9b2720af0ca9528b47898d9c7f4799 |
| SHA1 | 80495f16e333f54ecc700252323c2a7cb7d751e1 |
| SHA256 | d1ea9a17b5a635a121e82e7963d3b134f74050da9debcd40c9622f50c5d38fe5 |
| SHA512 | 5afe876f2cd887458656b1747bce08d03f26ef286bcc83efa93e0111be856d0564bee4d6ef5637c167626bac121f7371b69c7952502d47784ac9ad568bf53eac |
memory/3468-21-0x0000000000650000-0x0000000000677000-memory.dmp
memory/3468-23-0x0000000000650000-0x0000000000677000-memory.dmp
memory/3468-30-0x0000000000650000-0x0000000000677000-memory.dmp