Analysis Overview
SHA256
41a59ae071264aa21234503aa0d242738bd3e43240de80ef9dca815a3cee1dd0
Threat Level: Known bad
The file 888259a11434a8a9946875f80ab54aa0N.exe was found to be: Known bad.
Malicious Activity Summary
Urelas
Loads dropped DLL
Deletes itself
Executes dropped EXE
Checks computer location settings
System Location Discovery: System Language Discovery
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-08-06 09:04
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-08-06 09:04
Reported
2024-08-06 09:06
Platform
win7-20240705-en
Max time kernel
89s
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\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.exe
"C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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/2672-0-0x00000000012F0000-0x0000000001315000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | ff7c1f9a10d50bc9d3bbf580ed72b73b |
| SHA1 | 792d50e490934f73b80fd4c2c349519e6fac5fa1 |
| SHA256 | 433c6a7e8a9b3a11d6f060258300ed603e3ef5ffc5ac014518ed4b78c68501ca |
| SHA512 | c8998b8d8e57f4312db098d35b58c9ff7f131cdef1a74ae7000081c1875795707735e60f527063ee94b05fa343ee2536320ceab7307cd8874917f1c59d6088a6 |
memory/2860-10-0x0000000001270000-0x0000000001295000-memory.dmp
memory/2672-9-0x0000000000DF0000-0x0000000000E15000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | b8ecf69a1a03d699d7f0d675f0aa84d0 |
| SHA1 | 6e1033e87704c0358789166bbe030f83f9af203b |
| SHA256 | 82d48432831b2c601fe1489af0536b36bad2ecf1792edab30b6e174456701ee0 |
| SHA512 | ba51e854ffc0abc67485f51a2a712e1c5f3734506b38d150dd4945a12a7a800f7f37ae25119c00f8df46d302b1b062fd94022b4dd61ebb1a8294638f9d773ae1 |
memory/2672-19-0x00000000012F0000-0x0000000001315000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | 657ce9e5dd337971e44dfb9cb3fbf7dd |
| SHA1 | 026734083afaa4b7d298781b26a72ac9b67ac831 |
| SHA256 | 3138d6a5526aaa3cb120adb309f2a27d5fec03c8aa088268a1c7f378dd722472 |
| SHA512 | 79aab9648bb19ebe5946dd9edd7e11a70ea7b340a1c7539ccff3d3d13de2932bf5ea9077c079208e09bf5d632f00541e52d4926c5c80f86741effb8d86acd26d |
memory/2860-22-0x0000000001270000-0x0000000001295000-memory.dmp
memory/2860-24-0x0000000001270000-0x0000000001295000-memory.dmp
memory/2860-31-0x0000000001270000-0x0000000001295000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-08-06 09:04
Reported
2024-08-06 09:06
Platform
win10v2004-20240802-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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.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 4316 wrote to memory of 1364 | N/A | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 4316 wrote to memory of 1364 | N/A | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 4316 wrote to memory of 1364 | N/A | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 4316 wrote to memory of 2668 | N/A | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4316 wrote to memory of 2668 | N/A | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 4316 wrote to memory of 2668 | N/A | C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe
"C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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 | 20.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 77.190.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| KR | 218.54.47.76:11170 | tcp | |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| KR | 218.54.47.77:11150 | tcp | |
| US | 8.8.8.8:53 | 43.229.111.52.in-addr.arpa | udp |
Files
memory/4316-0-0x0000000000C20000-0x0000000000C45000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 4d055443425f7ee64eda99436d3a6a6e |
| SHA1 | 9175edf41f3146b629978ca1186f52e8ad225fde |
| SHA256 | c96affdd27cb706ac8b95f0f60c913110f478cf744bb29cd3c52c8278cd1f83f |
| SHA512 | b51d229f3a37212df7a4fb4713cc30a5b0e30efb397b88b7e1397dc94f65820bbc2e7d27880df78bed70f39ac23f094f7b55f1030376f5ce403cd859efaac7d2 |
memory/1364-15-0x0000000000B50000-0x0000000000B75000-memory.dmp
memory/4316-18-0x0000000000C20000-0x0000000000C45000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | b8ecf69a1a03d699d7f0d675f0aa84d0 |
| SHA1 | 6e1033e87704c0358789166bbe030f83f9af203b |
| SHA256 | 82d48432831b2c601fe1489af0536b36bad2ecf1792edab30b6e174456701ee0 |
| SHA512 | ba51e854ffc0abc67485f51a2a712e1c5f3734506b38d150dd4945a12a7a800f7f37ae25119c00f8df46d302b1b062fd94022b4dd61ebb1a8294638f9d773ae1 |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | 657ce9e5dd337971e44dfb9cb3fbf7dd |
| SHA1 | 026734083afaa4b7d298781b26a72ac9b67ac831 |
| SHA256 | 3138d6a5526aaa3cb120adb309f2a27d5fec03c8aa088268a1c7f378dd722472 |
| SHA512 | 79aab9648bb19ebe5946dd9edd7e11a70ea7b340a1c7539ccff3d3d13de2932bf5ea9077c079208e09bf5d632f00541e52d4926c5c80f86741effb8d86acd26d |
memory/1364-21-0x0000000000B50000-0x0000000000B75000-memory.dmp
memory/1364-23-0x0000000000B50000-0x0000000000B75000-memory.dmp
memory/1364-29-0x0000000000B50000-0x0000000000B75000-memory.dmp