Malware Analysis Report

2024-11-16 13:28

Sample ID 240813-myrwfstgnk
Target 88bbd48e4bce90062a08802f98712770N.exe
SHA256 3077adf5453f5ee4cef15f22fadde4b4bb26b1c2322349abd03de40c468196b1
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

3077adf5453f5ee4cef15f22fadde4b4bb26b1c2322349abd03de40c468196b1

Threat Level: Known bad

The file 88bbd48e4bce90062a08802f98712770N.exe was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas family

Urelas

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Deletes itself

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-13 10:52

Signatures

Urelas family

urelas

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-13 10:52

Reported

2024-08-13 10:54

Platform

win7-20240704-en

Max time kernel

90s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\88bbd48e4bce90062a08802f98712770N.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\88bbd48e4bce90062a08802f98712770N.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\88bbd48e4bce90062a08802f98712770N.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\88bbd48e4bce90062a08802f98712770N.exe

"C:\Users\Admin\AppData\Local\Temp\88bbd48e4bce90062a08802f98712770N.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/1996-0-0x0000000000870000-0x0000000000898000-memory.dmp

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

MD5 ecb919f131d9a6f1b0077789dd7112d6
SHA1 ccdfd88356336395078e91627cd66f817ef74fcc
SHA256 ca6273a59feef38696c7415be8d625169ed3a749b2c6f843d7e84ff3165ce7db
SHA512 3615135a62159c1168fa369c892804b132ecc3286e7f26a81970fbeb609935824d7b5ad4364aa9031007d52d748d59d263f595517fc55efcb0671a259d1bb83c

memory/1996-6-0x00000000004B0000-0x00000000004D8000-memory.dmp

memory/2484-10-0x0000000000EC0000-0x0000000000EE8000-memory.dmp

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

MD5 da205e14a1e4d4db842b29fd7c551e81
SHA1 8f3c706f4e6ddfe5524300e043e6f5b3e96ed7aa
SHA256 0f9b4f23e13001d731f0b7a5dcf413e9e71d1e06e70b5c7fdfca3eb19ca401cf
SHA512 c5b0be41f4f90bc91018942d3652b4974f696c7eccc4c93ffc2a88640eaf5410e72b5aadd4b8b6a8de830191388b331e22a666348fe796b4641d160deb00dd33

memory/1996-18-0x0000000000870000-0x0000000000898000-memory.dmp

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

MD5 b4a86880004da8726288d7ec954885a8
SHA1 1bab1cfbdc2c540246210bc7852f8fe7e8357b31
SHA256 c85016a9115aeb492bf116ab05791a9c3e6e30c39274767bd0476bd56a37db46
SHA512 22758f6c6de591c99f8f9857c1b03e55c242f0a4987d376b08c30bc608027d1574a228a8230099ddac2a3214663396b016e85d085204155a5ec26f87a28496b4

memory/2484-21-0x0000000000EC0000-0x0000000000EE8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-13 10:52

Reported

2024-08-13 10:54

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\88bbd48e4bce90062a08802f98712770N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\88bbd48e4bce90062a08802f98712770N.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\88bbd48e4bce90062a08802f98712770N.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\88bbd48e4bce90062a08802f98712770N.exe

"C:\Users\Admin\AppData\Local\Temp\88bbd48e4bce90062a08802f98712770N.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 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

memory/4980-0-0x0000000000690000-0x00000000006B8000-memory.dmp

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

MD5 92ae7aa228ff84414ef166c064b904a4
SHA1 ab6de8f186cdfd9c58c3a0629efa6858ffdaa312
SHA256 e92b7a13dbe3cd833d03dcda2c2c9b64e23696f9050b32e0f10f5051b73b3bf3
SHA512 74fe5335587a9f4f68f2564ae0316e19b270fc8eeb64286ba6618074d07ffb76a1c3d77ec70503e40244b9fd0f900e765b5d62aedcf2ad9b539ce73c74fe46cf

memory/4804-10-0x0000000000770000-0x0000000000798000-memory.dmp

memory/4980-14-0x0000000000690000-0x00000000006B8000-memory.dmp

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

MD5 da205e14a1e4d4db842b29fd7c551e81
SHA1 8f3c706f4e6ddfe5524300e043e6f5b3e96ed7aa
SHA256 0f9b4f23e13001d731f0b7a5dcf413e9e71d1e06e70b5c7fdfca3eb19ca401cf
SHA512 c5b0be41f4f90bc91018942d3652b4974f696c7eccc4c93ffc2a88640eaf5410e72b5aadd4b8b6a8de830191388b331e22a666348fe796b4641d160deb00dd33

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

MD5 b4a86880004da8726288d7ec954885a8
SHA1 1bab1cfbdc2c540246210bc7852f8fe7e8357b31
SHA256 c85016a9115aeb492bf116ab05791a9c3e6e30c39274767bd0476bd56a37db46
SHA512 22758f6c6de591c99f8f9857c1b03e55c242f0a4987d376b08c30bc608027d1574a228a8230099ddac2a3214663396b016e85d085204155a5ec26f87a28496b4

memory/4804-17-0x0000000000770000-0x0000000000798000-memory.dmp