Malware Analysis Report

2024-11-16 13:25

Sample ID 241010-z1l47sxakd
Target 4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb
SHA256 4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb
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

4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb

Threat Level: Known bad

The file 4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb 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

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-10 21:11

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-10 21:11

Reported

2024-10-10 21:13

Platform

win7-20240903-en

Max time kernel

122s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.exe

"C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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/2668-0-0x00000000000D0000-0x00000000000F5000-memory.dmp

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

MD5 f91e2914dcffa569fe8aed57f8d9f577
SHA1 03c9b2d94145768fd17269d3a3d24be4cdc899ac
SHA256 734c2bb0ba406ef754ca25bf0761fa203e4267a5fc3ba4c28f5e2245f6ecff74
SHA512 d3a9b5bcc6f3aff9a08930cacc600b782630a66a13e7d13c18e3a076b795caa3f409c8dc07b450326107a2438a1fedf1e26b041ab99079fbc86200bbd6a371a9

memory/2712-10-0x0000000000B40000-0x0000000000B65000-memory.dmp

memory/2668-9-0x0000000000430000-0x0000000000455000-memory.dmp

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

MD5 81636de2e91f2cf944a42f5849c54575
SHA1 f5d5fe65461deabd03da16d528c7ccace6557c73
SHA256 5a8e87ab4a66938bdab75b6aa5d0cec15c528d3d1f11d50759ca7e01730bb66d
SHA512 34f07e2a439e36cd4282b62fc10d1b9f80468525f1b138b7405eb2bf4381ee9c99e936ee33977fe6a96b915b484cd7599fc8c393f7402f3227e6ece321449ea0

memory/2668-19-0x00000000000D0000-0x00000000000F5000-memory.dmp

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

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/2712-22-0x0000000000B40000-0x0000000000B65000-memory.dmp

memory/2712-24-0x0000000000B40000-0x0000000000B65000-memory.dmp

memory/2712-31-0x0000000000B40000-0x0000000000B65000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-10 21:11

Reported

2024-10-10 21:13

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.exe

"C:\Users\Admin\AppData\Local\Temp\4e41dd38ae85aa7aa1770e07d8318522be0fa5807a6fb1a1faafdcd6f7e5dbfb.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 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.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 8.8.8.8:53 103.209.201.84.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 68.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/1256-0-0x00000000006B0000-0x00000000006D5000-memory.dmp

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

MD5 202ad29db50bca07779982ad64d8fb67
SHA1 9da41c94a5d7e044b13807950ce4fd3bd9beefe5
SHA256 89418cf141d72fd8d2069cbf34a44d175db65f5185e6e820f0a4c16d9ed5f7a7
SHA512 dfd5d9d261ac0ceb6d3e3603fe9f8cc6100a247f1e70203083feb8742f077090d163e65ab1b3ec6a7f593c7bee51164d53f7bdacb4bfa547c424368a5849f4fa

memory/1868-15-0x00000000002E0000-0x0000000000305000-memory.dmp

memory/1256-17-0x00000000006B0000-0x00000000006D5000-memory.dmp

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

MD5 81636de2e91f2cf944a42f5849c54575
SHA1 f5d5fe65461deabd03da16d528c7ccace6557c73
SHA256 5a8e87ab4a66938bdab75b6aa5d0cec15c528d3d1f11d50759ca7e01730bb66d
SHA512 34f07e2a439e36cd4282b62fc10d1b9f80468525f1b138b7405eb2bf4381ee9c99e936ee33977fe6a96b915b484cd7599fc8c393f7402f3227e6ece321449ea0

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

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/1868-20-0x00000000002E0000-0x0000000000305000-memory.dmp

memory/1868-22-0x00000000002E0000-0x0000000000305000-memory.dmp

memory/1868-29-0x00000000002E0000-0x0000000000305000-memory.dmp