Malware Analysis Report

2024-11-16 13:26

Sample ID 240803-fe95cstemj
Target 506a4b2f07b85042d59325b112bf3fc0N.exe
SHA256 533cc19bd9b2b2bd5db03316d8a7e486f03c5c4b697887b33f1b691b37925d35
Tags
urelas discovery trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

533cc19bd9b2b2bd5db03316d8a7e486f03c5c4b697887b33f1b691b37925d35

Threat Level: Known bad

The file 506a4b2f07b85042d59325b112bf3fc0N.exe was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Loads dropped DLL

Deletes itself

Executes dropped EXE

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-03 04:48

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-03 04:48

Reported

2024-08-03 04:50

Platform

win7-20240708-en

Max time kernel

89s

Max time network

91s

Command Line

"C:\Users\Admin\AppData\Local\Temp\506a4b2f07b85042d59325b112bf3fc0N.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\506a4b2f07b85042d59325b112bf3fc0N.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\506a4b2f07b85042d59325b112bf3fc0N.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\506a4b2f07b85042d59325b112bf3fc0N.exe

"C:\Users\Admin\AppData\Local\Temp\506a4b2f07b85042d59325b112bf3fc0N.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/2560-0-0x00000000008C0000-0x00000000008E8000-memory.dmp

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

MD5 5e71120fbb0d221b56ac5d7620b47417
SHA1 448b4014d2471362f97f7de40aa06c5958e539d6
SHA256 5e7383e3bf16744b8b8a031f63668becc70a3bdfb98933a478d8bc938e418b62
SHA512 6e8c2d1d482e0dd1d050d5eb73547f4193f5d17026e9221135a64ebd4b337f8dc9ee546e6ab26bd7a26e22a80aaf2ae6d93d431a48448c7d715b4994769c2b49

memory/2448-10-0x0000000000AC0000-0x0000000000AE8000-memory.dmp

memory/2560-9-0x0000000001CF0000-0x0000000001D18000-memory.dmp

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

MD5 41cb059dcbabf4eea539b86327b87ce6
SHA1 db95bfbabc68551c82723898a9f757077fe0a04a
SHA256 adb300d917f874ff90168c061d97be534934c795169393cccb0b832925b9fcbe
SHA512 a144f960448fd49c74be466039adcfbffe745e3205626f116003d960474017e97a73aba27710005dd5079e851189f6538aa7befe1c227b008dc10dc71494e951

memory/2560-19-0x00000000008C0000-0x00000000008E8000-memory.dmp

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

MD5 a250860c0687ed9dda488805c025a2d2
SHA1 0c181ed3b46463d35631ca169f0928c33a1da389
SHA256 3947c34dfc780b424a3207c6ebe12f667bcb839733107f7a94fe495ec705cb37
SHA512 0286fcd24203ef574c9fc37200e4b0e65d58296162aa89b5424ab48b814bd237e609ab7eaf42a69bdad2ab6414bfbbfaec4757e28b29c69752e0e65a653f665a

memory/2448-22-0x0000000000AC0000-0x0000000000AE8000-memory.dmp

memory/2448-24-0x0000000000AC0000-0x0000000000AE8000-memory.dmp

memory/2448-31-0x0000000000AC0000-0x0000000000AE8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-03 04:48

Reported

2024-08-03 04:50

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\506a4b2f07b85042d59325b112bf3fc0N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\506a4b2f07b85042d59325b112bf3fc0N.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\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\506a4b2f07b85042d59325b112bf3fc0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\506a4b2f07b85042d59325b112bf3fc0N.exe

"C:\Users\Admin\AppData\Local\Temp\506a4b2f07b85042d59325b112bf3fc0N.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 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.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 73.144.22.2.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/4928-0-0x00000000003D0000-0x00000000003F8000-memory.dmp

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

MD5 79d2750a59e472ed8a23450c180289b1
SHA1 c9c639544a2eddc3ebf39c957d51beafc8875a49
SHA256 83f7ca9b465ec3d6ff05bf332f31a01872a101179e848887ef7fb3919660f161
SHA512 b487c26a1566ffadb56824d9ecbb60e738f48c5fe5f33805fd730050cbd87158ab8fec3ddd58f374dbfc7c61a30afbfd206751e691eb95fc2640edca517f92ea

memory/1376-15-0x0000000000D00000-0x0000000000D28000-memory.dmp

memory/4928-18-0x00000000003D0000-0x00000000003F8000-memory.dmp

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

MD5 41cb059dcbabf4eea539b86327b87ce6
SHA1 db95bfbabc68551c82723898a9f757077fe0a04a
SHA256 adb300d917f874ff90168c061d97be534934c795169393cccb0b832925b9fcbe
SHA512 a144f960448fd49c74be466039adcfbffe745e3205626f116003d960474017e97a73aba27710005dd5079e851189f6538aa7befe1c227b008dc10dc71494e951

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

MD5 a250860c0687ed9dda488805c025a2d2
SHA1 0c181ed3b46463d35631ca169f0928c33a1da389
SHA256 3947c34dfc780b424a3207c6ebe12f667bcb839733107f7a94fe495ec705cb37
SHA512 0286fcd24203ef574c9fc37200e4b0e65d58296162aa89b5424ab48b814bd237e609ab7eaf42a69bdad2ab6414bfbbfaec4757e28b29c69752e0e65a653f665a

memory/1376-21-0x0000000000D00000-0x0000000000D28000-memory.dmp

memory/1376-23-0x0000000000D00000-0x0000000000D28000-memory.dmp

memory/1376-30-0x0000000000D00000-0x0000000000D28000-memory.dmp