Malware Analysis Report

2024-11-16 13:27

Sample ID 240805-esx7aazhpf
Target 48a121356fc7b3917d788e1d02440d50N.exe
SHA256 caa35807916b5fbe3e9a93757753a4512712377ad0a25d1109d6937df96b4a6b
Tags
urelas discovery 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

caa35807916b5fbe3e9a93757753a4512712377ad0a25d1109d6937df96b4a6b

Threat Level: Known bad

The file 48a121356fc7b3917d788e1d02440d50N.exe was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Deletes itself

Loads dropped DLL

Executes dropped EXE

Checks computer location settings

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-05 04:12

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-05 04:12

Reported

2024-08-05 04:14

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

112s

Command Line

"C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-786284298-625481688-3210388970-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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

Processes

C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe

"C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 2.36.159.162.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
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 29.243.111.52.in-addr.arpa udp

Files

memory/2144-0-0x0000000000D40000-0x0000000000D65000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\biudfw.exe

MD5 f987e3244df28776c72de09f3bacdfe7
SHA1 dd4f1fce9a5f401650ea2a2ade198dffe908be1d
SHA256 9eda949b6714895dbeac414fb1c66e96c1f8dfe5dd3d1621991d32d3bb22972a
SHA512 87d7d08312593811d82b39af3e5716d44da206f5df49e40085444252d251b7c36947f06a70eb4f40eb2e39e49358d2e862e457940a8dc634cd7358c6db7a2d09

memory/2428-15-0x0000000000A10000-0x0000000000A35000-memory.dmp

memory/2144-18-0x0000000000D40000-0x0000000000D65000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\sanfdr.bat

MD5 779d135e91fe6dca8ef63dd843c2929a
SHA1 647be14c8bfac66ed294cb40963f0202fdf1af69
SHA256 6a3f5bc5cf37fbf041deab1a056c7fca16be3891ead0ae353295b0ce0f017dc3
SHA512 19365c8364cd1a3d5109d8b0b6eb5275e0febd063500097dfc9ced7d5259feea3a107b0fbbfed0232bdf8bb07bc53e01d0e8839b9f8d8daf60d448c85f897ab6

C:\Users\Admin\AppData\Local\Temp\golfinfo.ini

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/2428-21-0x0000000000A10000-0x0000000000A35000-memory.dmp

memory/2428-23-0x0000000000A10000-0x0000000000A35000-memory.dmp

memory/2428-30-0x0000000000A10000-0x0000000000A35000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-05 04:12

Reported

2024-08-05 04:14

Platform

win7-20240705-en

Max time kernel

90s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

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\48a121356fc7b3917d788e1d02440d50N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.exe

"C:\Users\Admin\AppData\Local\Temp\48a121356fc7b3917d788e1d02440d50N.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/1440-0-0x0000000000120000-0x0000000000145000-memory.dmp

memory/1440-6-0x0000000000410000-0x0000000000435000-memory.dmp

\Users\Admin\AppData\Local\Temp\biudfw.exe

MD5 3990afdb8520ebbc38b595db1122a276
SHA1 4dbaa80d9742b0a184481b82fa89d98b84006017
SHA256 175a3071d9703a9edf83d710c8c579c6da830fe57d616615648e4a9c2e0ba376
SHA512 54ef3c940fc486d1030bf7cc285363724d293885455b913a4a13e7338847e5cace4ddfa8bcebcd255f7c867c0e8a2046867dde720fff7ee31211f6071b3952de

memory/1120-10-0x0000000000940000-0x0000000000965000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\sanfdr.bat

MD5 779d135e91fe6dca8ef63dd843c2929a
SHA1 647be14c8bfac66ed294cb40963f0202fdf1af69
SHA256 6a3f5bc5cf37fbf041deab1a056c7fca16be3891ead0ae353295b0ce0f017dc3
SHA512 19365c8364cd1a3d5109d8b0b6eb5275e0febd063500097dfc9ced7d5259feea3a107b0fbbfed0232bdf8bb07bc53e01d0e8839b9f8d8daf60d448c85f897ab6

memory/1440-18-0x0000000000120000-0x0000000000145000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\golfinfo.ini

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/1120-21-0x0000000000940000-0x0000000000965000-memory.dmp

memory/1120-23-0x0000000000940000-0x0000000000965000-memory.dmp

memory/1120-29-0x0000000000940000-0x0000000000965000-memory.dmp