Malware Analysis Report

2024-11-16 13:26

Sample ID 241008-3y1rcsvdpc
Target 7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc
SHA256 7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc
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

7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc

Threat Level: Known bad

The file 7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

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

Analysis: static1

Detonation Overview

Reported

2024-10-08 23:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-08 23:56

Reported

2024-10-08 23:58

Platform

win7-20240903-en

Max time kernel

119s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
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\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\biudfw.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.exe

"C:\Users\Admin\AppData\Local\Temp\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.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/2948-0-0x0000000000A40000-0x0000000000A68000-memory.dmp

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

MD5 87f18c606d0e976190250795aaab8a3b
SHA1 a740ed68d629b59b76ced3f5dd823fecf39db2fc
SHA256 9306cf7cba1caa1f7ab607dd03139e4440a2a7f2e6ab85f31c17a632d23c4e79
SHA512 94a95f216f2d832d0a963fade7c27014b0b46368acd60ea1e4c43dfb646fb48e94a7b47f1b3bfcd00217d545b0789e0eabc866d8982de3e374fab9c481e0a849

memory/2948-6-0x0000000000420000-0x0000000000448000-memory.dmp

memory/2956-10-0x0000000000380000-0x00000000003A8000-memory.dmp

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

MD5 415a99a7256dc5ec428116ab06cf6df4
SHA1 2d9ba6b153227c8b10968cea3bd61bb6ec16eb08
SHA256 e73f22f4d8fd9ccd1a873a0c92d56568c05958fc8d61bce774fc0a479faf894f
SHA512 98b62a5a727442e633f16ca6651e5688dedc87c053731a5f5d4bf659073040a9b71a68d0398450ca52f99784122f33ccc76eec4e4dabb1942c404ec60cb34bfb

memory/2948-19-0x0000000000A40000-0x0000000000A68000-memory.dmp

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

MD5 a250860c0687ed9dda488805c025a2d2
SHA1 0c181ed3b46463d35631ca169f0928c33a1da389
SHA256 3947c34dfc780b424a3207c6ebe12f667bcb839733107f7a94fe495ec705cb37
SHA512 0286fcd24203ef574c9fc37200e4b0e65d58296162aa89b5424ab48b814bd237e609ab7eaf42a69bdad2ab6414bfbbfaec4757e28b29c69752e0e65a653f665a

memory/2956-22-0x0000000000380000-0x00000000003A8000-memory.dmp

memory/2956-24-0x0000000000380000-0x00000000003A8000-memory.dmp

memory/2956-30-0x0000000000380000-0x00000000003A8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-08 23:56

Reported

2024-10-08 23:58

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.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\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.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\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.exe

"C:\Users\Admin\AppData\Local\Temp\7b8e307c3337b89db988b2d008477c956b6ca7dc3a88bc8745b42280690db4bc.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 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 100.209.201.84.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

memory/3120-0-0x00000000009B0000-0x00000000009D8000-memory.dmp

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

MD5 e552928ca08827b60b345262931b5db1
SHA1 952b55407f600c2c278c892c10431335b7d60349
SHA256 99092e566b649670bbe0097568c4057cae541d7f13ff463c1828653db8d403a3
SHA512 7cc6a69299fed86559b8d51ab5150c97551c9e0404c34633712d5cbef481a55a933faeb951dd5ee67088d96fc5a3a4960d7f9f34b283bf05bffc055163eb590a

memory/1996-13-0x00000000002D0000-0x00000000002F8000-memory.dmp

memory/3120-18-0x00000000009B0000-0x00000000009D8000-memory.dmp

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

MD5 415a99a7256dc5ec428116ab06cf6df4
SHA1 2d9ba6b153227c8b10968cea3bd61bb6ec16eb08
SHA256 e73f22f4d8fd9ccd1a873a0c92d56568c05958fc8d61bce774fc0a479faf894f
SHA512 98b62a5a727442e633f16ca6651e5688dedc87c053731a5f5d4bf659073040a9b71a68d0398450ca52f99784122f33ccc76eec4e4dabb1942c404ec60cb34bfb

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

MD5 a250860c0687ed9dda488805c025a2d2
SHA1 0c181ed3b46463d35631ca169f0928c33a1da389
SHA256 3947c34dfc780b424a3207c6ebe12f667bcb839733107f7a94fe495ec705cb37
SHA512 0286fcd24203ef574c9fc37200e4b0e65d58296162aa89b5424ab48b814bd237e609ab7eaf42a69bdad2ab6414bfbbfaec4757e28b29c69752e0e65a653f665a

memory/1996-21-0x00000000002D0000-0x00000000002F8000-memory.dmp

memory/1996-23-0x00000000002D0000-0x00000000002F8000-memory.dmp

memory/1996-30-0x00000000002D0000-0x00000000002F8000-memory.dmp