Malware Analysis Report

2024-11-16 13:25

Sample ID 241012-afk9qs1hne
Target 8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc
SHA256 8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc
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

8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc

Threat Level: Known bad

The file 8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Executes dropped EXE

Loads dropped DLL

Deletes itself

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

2024-10-12 00:09

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-12 00:09

Reported

2024-10-12 00:11

Platform

win7-20241010-en

Max time kernel

90s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.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\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.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\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.exe

"C:\Users\Admin\AppData\Local\Temp\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.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/2220-0-0x0000000000B10000-0x0000000000B35000-memory.dmp

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

MD5 34a16d9217c9a19138ef045ede14ef6e
SHA1 50a15c9371e393549e654ebbcd506d198487f86c
SHA256 c5ba3ca92caf1cf29ba20c38a34a076bfbd3b7d2847fb2b94e4acb9f238ebf60
SHA512 17ab138a9bae1cc070a2726f4d696a1902b42e37d16b364d28226286a31bc5839163b3d679ca07ddc9ec772df4353e6099316e6eab0baf7a8bdd192818f5be33

memory/2220-6-0x00000000008F0000-0x0000000000915000-memory.dmp

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

MD5 ca924d4b88a01a30062207c12f11646a
SHA1 71aa72755cd58918ae9af3cc588db2ed7a9e19a1
SHA256 f6e5fc49e2ed487d335a5885a87d2e36da4be512939186548d1b0a823e21dc68
SHA512 bc1086536a44aa8a52e165b3425d3bc8ba12973dcb04bbea23bdc8f2a7deef4ceb5ea8b6148a32962dd96c6f8153de5599119a8c455f688cea2b54c6a9cc13f0

memory/2220-18-0x0000000000B10000-0x0000000000B35000-memory.dmp

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

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/2592-21-0x0000000000FC0000-0x0000000000FE5000-memory.dmp

memory/2592-23-0x0000000000FC0000-0x0000000000FE5000-memory.dmp

memory/2592-29-0x0000000000FC0000-0x0000000000FE5000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-12 00:09

Reported

2024-10-12 00:11

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

97s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.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\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.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\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.exe

"C:\Users\Admin\AppData\Local\Temp\8e4d91bf0dbee54a2a9f2280f8cbeff946919b6e8b44fc8e5163c3f824cc06bc.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 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.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 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.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 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

memory/4248-0-0x0000000000DF0000-0x0000000000E15000-memory.dmp

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

MD5 7f552cb504df509996ff3881a797562f
SHA1 a683ecf5de73092b28e90a1eb4dc8f89ff8bf17e
SHA256 1d9569844a03fd53c2e43e8c64ff10380c62c3928d18aedb48ed302134244d8c
SHA512 cc8570d02772080917db2f9829937a0eb53e882b8f41a292ceda13e13a9b321cd7d5146672520685acacb9c43471c7ffe58f7be08c5f4d791e3756ef26aada64

memory/2804-13-0x0000000000800000-0x0000000000825000-memory.dmp

memory/4248-17-0x0000000000DF0000-0x0000000000E15000-memory.dmp

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

MD5 ca924d4b88a01a30062207c12f11646a
SHA1 71aa72755cd58918ae9af3cc588db2ed7a9e19a1
SHA256 f6e5fc49e2ed487d335a5885a87d2e36da4be512939186548d1b0a823e21dc68
SHA512 bc1086536a44aa8a52e165b3425d3bc8ba12973dcb04bbea23bdc8f2a7deef4ceb5ea8b6148a32962dd96c6f8153de5599119a8c455f688cea2b54c6a9cc13f0

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

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/2804-20-0x0000000000800000-0x0000000000825000-memory.dmp

memory/2804-22-0x0000000000800000-0x0000000000825000-memory.dmp

memory/2804-28-0x0000000000800000-0x0000000000825000-memory.dmp