Analysis Overview
SHA256
6edf4b4fd4c9444373d4cc6a9d1022a174c7088361c7212d5e7877eb030d150c
Threat Level: Known bad
The file 8b539a06f73be7631c06097dd2537e00N.exe was found to be: Known bad.
Malicious Activity Summary
Urelas
Urelas family
Deletes itself
Loads dropped DLL
Checks computer location settings
Executes dropped EXE
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
2024-07-31 07:42
Signatures
Urelas family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-07-31 07:42
Reported
2024-07-31 07:44
Platform
win7-20240729-en
Max time kernel
89s
Max time network
89s
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\8b539a06f73be7631c06097dd2537e00N.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\8b539a06f73be7631c06097dd2537e00N.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\8b539a06f73be7631c06097dd2537e00N.exe
"C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 657b2d57ea7bde323c4ab5c99875e274 |
| SHA1 | d934746fe090eb58fbcde2554f02e106a7380614 |
| SHA256 | f3ae40b7e2b80cb7825bb3566bfe178e8854c05e331d01a8d3ed9b1921fbe7b1 |
| SHA512 | 48cd249ca789c62ea6dba0dc402fb5575edcdcc1e7f7abb4fc40ee8373b701a7ba200037200fb1878bb9ed9ff1fa30129ce7b5dee4f061f0bdab2e1124907a89 |
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 31429775ef6629e8cfb9db58991f6b72 |
| SHA1 | ab996535ed2155db6bb71fe93aa58f2b97517117 |
| SHA256 | 44e501989e3e5bd3c85d7fd4dad7cb4c5f2110bf1986084b1251124ad03884f7 |
| SHA512 | 8174bbbee728ac71f41b6a1fc24b9ad53b4444f5ca64652672d35a14e80f1bc0c8ea3c8ee64385d1c76063a11a4a53c8acdbbcf9b82abe4a155cce68556f16c7 |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | 2930c042c9ee5e07f321f2134a0c7edc |
| SHA1 | ee39f41eaf6ce3c8d917a89e65959414ae0088e6 |
| SHA256 | a328475bbb730da292b83ed6cabbdbfc0616f042296f0c6fa356c5368ffc1309 |
| SHA512 | 2da91d5effc116d8c8661c2a99f1d9c2aaffda0f776551dc7ad1911fdb2765591e5b441b9a1fe0090bcda8ed24d180b563ed2c127676cf1de40001e4b15b5506 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-07-31 07:42
Reported
2024-07-31 07:44
Platform
win10v2004-20240730-en
Max time kernel
95s
Max time network
96s
Command Line
Signatures
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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\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\8b539a06f73be7631c06097dd2537e00N.exe | N/A |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3712 wrote to memory of 3268 | N/A | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 3712 wrote to memory of 3268 | N/A | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 3712 wrote to memory of 3268 | N/A | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe | C:\Users\Admin\AppData\Local\Temp\biudfw.exe |
| PID 3712 wrote to memory of 4512 | N/A | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3712 wrote to memory of 4512 | N/A | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe | C:\Windows\SysWOW64\cmd.exe |
| PID 3712 wrote to memory of 4512 | N/A | C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe | C:\Windows\SysWOW64\cmd.exe |
Processes
C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe
"C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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 | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 8.8.8.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 76.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| KR | 218.54.47.74:11150 | tcp | |
| 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 | 19.229.111.52.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 168eb6fbac21f9ee4c6c8bdffb92b0c9 |
| SHA1 | a8ae033932a7e85d4921e01345796dc1eb441fa7 |
| SHA256 | 3a76d440cb8a2e4ac952ce3c38016bb74d5d4cdbf06e4bb5ef70ff1267839ca6 |
| SHA512 | c20ad48fa8bbd8043126c6580e34cdfd7cf5948c969de1debd101b7ab73d33d6605d611ef83989f3791ad4d4f339c6b5675c1f530feca6b8f83063df76cb62bc |
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | 31429775ef6629e8cfb9db58991f6b72 |
| SHA1 | ab996535ed2155db6bb71fe93aa58f2b97517117 |
| SHA256 | 44e501989e3e5bd3c85d7fd4dad7cb4c5f2110bf1986084b1251124ad03884f7 |
| SHA512 | 8174bbbee728ac71f41b6a1fc24b9ad53b4444f5ca64652672d35a14e80f1bc0c8ea3c8ee64385d1c76063a11a4a53c8acdbbcf9b82abe4a155cce68556f16c7 |
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | 2930c042c9ee5e07f321f2134a0c7edc |
| SHA1 | ee39f41eaf6ce3c8d917a89e65959414ae0088e6 |
| SHA256 | a328475bbb730da292b83ed6cabbdbfc0616f042296f0c6fa356c5368ffc1309 |
| SHA512 | 2da91d5effc116d8c8661c2a99f1d9c2aaffda0f776551dc7ad1911fdb2765591e5b441b9a1fe0090bcda8ed24d180b563ed2c127676cf1de40001e4b15b5506 |