Malware Analysis Report

2025-08-11 00:31

Sample ID 240311-avv3gsfe52
Target c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe
SHA256 c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe
Tags
urelas trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe

Threat Level: Known bad

The file c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe was found to be: Known bad.

Malicious Activity Summary

urelas trojan

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

Analysis: static1

Detonation Overview

Reported

2024-03-11 00:32

Signatures

Urelas family

urelas

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

"C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.exe"

Signatures

Urelas

trojan 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

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

"C:\Users\Admin\AppData\Local\Temp\c61e4c357290a31faca4db045b53cc112cad3ac615f167ed3e54bf837bc13afe.exe"

Signatures

Urelas

trojan 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

Enumerates physical storage devices

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