Malware Analysis Report

2024-11-16 13:26

Sample ID 241008-3w9aqazfrq
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

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

2024-10-08 23:53

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-08 23:53

Reported

2024-10-08 23:55

Platform

win7-20240903-en

Max time kernel

122s

Max time network

125s

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:\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

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/1608-0-0x0000000001100000-0x0000000001128000-memory.dmp

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

MD5 c161442d6a748b04599a260b62583338
SHA1 b930c51f5557652f9b013f5788c1c3674a1f25ec
SHA256 e9e3d337e5def42f772faf3a5abc4f5d78770c7150616006b26912b586f3a77f
SHA512 73ccc6f43739c184dc28b2709a1c05827814a6333439319493b533e30f7b8f51d4955ad434fa53921ab26c915abbd2d91ab86b751bf823659c79bd1cce78c9c5

memory/1608-6-0x0000000000880000-0x00000000008A8000-memory.dmp

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

MD5 415a99a7256dc5ec428116ab06cf6df4
SHA1 2d9ba6b153227c8b10968cea3bd61bb6ec16eb08
SHA256 e73f22f4d8fd9ccd1a873a0c92d56568c05958fc8d61bce774fc0a479faf894f
SHA512 98b62a5a727442e633f16ca6651e5688dedc87c053731a5f5d4bf659073040a9b71a68d0398450ca52f99784122f33ccc76eec4e4dabb1942c404ec60cb34bfb

memory/1608-18-0x0000000001100000-0x0000000001128000-memory.dmp

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

MD5 a250860c0687ed9dda488805c025a2d2
SHA1 0c181ed3b46463d35631ca169f0928c33a1da389
SHA256 3947c34dfc780b424a3207c6ebe12f667bcb839733107f7a94fe495ec705cb37
SHA512 0286fcd24203ef574c9fc37200e4b0e65d58296162aa89b5424ab48b814bd237e609ab7eaf42a69bdad2ab6414bfbbfaec4757e28b29c69752e0e65a653f665a

memory/3012-21-0x0000000000A90000-0x0000000000AB8000-memory.dmp

memory/3012-23-0x0000000000A90000-0x0000000000AB8000-memory.dmp

memory/3012-30-0x0000000000A90000-0x0000000000AB8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-08 23:53

Reported

2024-10-08 23:55

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

149s

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-1-5-21-2437139445-1151884604-3026847218-1000\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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.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 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 139.190.18.2.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

memory/2268-0-0x00000000006F0000-0x0000000000718000-memory.dmp

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

MD5 750ed92b5c76f83824e6ef261b0b4097
SHA1 16a0b8df408e302d5d8fcdcc95dfc7a09a2e899a
SHA256 33cd89ff73e1a2693a020f072594d963f1a5d2a2ee36688c7ad1bcd99254b9b7
SHA512 3fc5d8b2b5fbb15f94049aafd6908a97c58c81e517632b595e1475ba36464a1a6c8de2bb0d086333776d96f73d0f9ad16d3fd6cb39b14ebc57ff3051fa9ddb6a

memory/2504-13-0x0000000000A30000-0x0000000000A58000-memory.dmp

memory/2268-18-0x00000000006F0000-0x0000000000718000-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/2504-21-0x0000000000A30000-0x0000000000A58000-memory.dmp

memory/2504-23-0x0000000000A30000-0x0000000000A58000-memory.dmp

memory/2504-29-0x0000000000A30000-0x0000000000A58000-memory.dmp