Analysis Overview
SHA256
c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe
Threat Level: Known bad
The file c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe was found to be: Known bad.
Malicious Activity Summary
Urelas family
Urelas
Executes dropped EXE
Deletes itself
Checks computer location settings
Loads dropped DLL
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-11 00:32
Signatures
Urelas family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-11 00:32
Reported
2024-03-11 00:35
Platform
win10v2004-20240226-en
Max time kernel
141s
Max time network
151s
Command Line
Signatures
Urelas
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.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
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.exe
"C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.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" "
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4004 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
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 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.205.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| KR | 218.54.47.76:11120 | tcp | |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 28.118.140.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 140.71.91.104.in-addr.arpa | udp |
| KR | 218.54.47.74:11150 | tcp | |
| US | 8.8.8.8:53 | 58.55.71.13.in-addr.arpa | udp |
| KR | 218.54.47.76:11170 | tcp | |
| KR | 218.54.47.77:11150 | tcp | |
| US | 8.8.8.8:53 | 13.227.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 43.58.199.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 88.65.42.20.in-addr.arpa | udp |
Files
memory/4432-0-0x0000000000870000-0x00000000008A8000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | 10cf69dabe7e7d95f1c29100183be0ed |
| SHA1 | 59e3bb0b907688dd135e5f695d1dbbdbf41d4006 |
| SHA256 | d8c697246088c74958f41d29d7d1d27663f312c975c93b1799bb3fa052cc06d1 |
| SHA512 | ea0c1fa9e4f4eca26bc83d50e3f33693e16f53b1a1f15eecac29847f68f5949e991c8705609550c14f1f0e4d6c72a66078013fdf4fc7448534d6cff7fecf0ad4 |
memory/2392-12-0x0000000000BE0000-0x0000000000C18000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | f64070642a1a720d7a17e819dc4385e2 |
| SHA1 | f95d5d6ab332a0eacf2254bf0abcf08a924c34bf |
| SHA256 | e28fcc2140ea98d7549421823c158593a8a668bc272bf5ad0ee2a4cbfc4ad1c6 |
| SHA512 | ca3ba9b70ba45567ad3d86cd176fdd1aaf4ef0c9ccb4df2182b9d3ee7dcdeffd08f6076edc426958b1e243791708fea93cf0284eaed1feeb309ce16a29fc43fa |
memory/4432-18-0x0000000000870000-0x00000000008A8000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | fc7c2ef888930c9e3d5e328202990a11 |
| SHA1 | 336cbc6a838acad79206b98e9eb2414736e718ed |
| SHA256 | 79115937973fc5e46c104e0eff35fe65ece75db6224847bcd152057b496ed517 |
| SHA512 | a426d6b66e7576aa639692147f14d8c6c8b580b16ac2b17d2c8e68e01f423d11205fb806074b26273f1ca267f85bc6edd91f932e7d5deeb95811cd20622690e7 |
memory/2392-20-0x0000000000BE0000-0x0000000000C18000-memory.dmp
memory/2392-21-0x0000000000BE0000-0x0000000000C18000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-11 00:32
Reported
2024-03-11 00:35
Platform
win7-20240221-en
Max time kernel
117s
Max time network
118s
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\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.exe | N/A |
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.exe
"C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.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/3020-0-0x00000000002A0000-0x00000000002D8000-memory.dmp
\Users\Admin\AppData\Local\Temp\biudfw.exe
| MD5 | a879643cbfd03f6f07941e055a6e0e49 |
| SHA1 | 0b27f7a1730f1a120407d6c739079165b32c0e4a |
| SHA256 | 4cadce1deddde47fed223c91cff638269315f2f54ea1c2d21699f595f5bd4470 |
| SHA512 | cbb6e1a27d794fef796381771adf9a2aa8466b9745d2a13a9f6b1fdbe75c791e4231f3fcde2ffe6ea53071bc98bf9aa5b9d0a7bab321c0a69bfb5f703d17daee |
memory/3020-15-0x0000000000530000-0x0000000000568000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\sanfdr.bat
| MD5 | f64070642a1a720d7a17e819dc4385e2 |
| SHA1 | f95d5d6ab332a0eacf2254bf0abcf08a924c34bf |
| SHA256 | e28fcc2140ea98d7549421823c158593a8a668bc272bf5ad0ee2a4cbfc4ad1c6 |
| SHA512 | ca3ba9b70ba45567ad3d86cd176fdd1aaf4ef0c9ccb4df2182b9d3ee7dcdeffd08f6076edc426958b1e243791708fea93cf0284eaed1feeb309ce16a29fc43fa |
memory/2168-18-0x0000000000E30000-0x0000000000E68000-memory.dmp
memory/3020-17-0x00000000002A0000-0x00000000002D8000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\golfinfo.ini
| MD5 | fc7c2ef888930c9e3d5e328202990a11 |
| SHA1 | 336cbc6a838acad79206b98e9eb2414736e718ed |
| SHA256 | 79115937973fc5e46c104e0eff35fe65ece75db6224847bcd152057b496ed517 |
| SHA512 | a426d6b66e7576aa639692147f14d8c6c8b580b16ac2b17d2c8e68e01f423d11205fb806074b26273f1ca267f85bc6edd91f932e7d5deeb95811cd20622690e7 |
memory/3020-21-0x0000000000530000-0x0000000000568000-memory.dmp
memory/2168-22-0x0000000000E30000-0x0000000000E68000-memory.dmp
memory/2168-23-0x0000000000E30000-0x0000000000E68000-memory.dmp