Malware Analysis Report

2024-11-16 13:28

Sample ID 240813-hj8s7sygrf
Target 6bb73a3ecda5d7f7fcdb2a9be988f6e0N.exe
SHA256 5696a123e2420ad015dd20b7e15198792b32a079557b6f89ce3b96dc773f71af
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

5696a123e2420ad015dd20b7e15198792b32a079557b6f89ce3b96dc773f71af

Threat Level: Known bad

The file 6bb73a3ecda5d7f7fcdb2a9be988f6e0N.exe was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Urelas family

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Deletes itself

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-13 06:47

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 06:47

Reported

2024-08-13 06:49

Platform

win7-20240704-en

Max time kernel

91s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.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\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.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\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.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\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.exe

"C:\Users\Admin\AppData\Local\Temp\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.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

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

MD5 a8df7d6669bcaa6ce5351339fe4abf2e
SHA1 07f919f1fccf982024bc0ab4c387140654e51d95
SHA256 2faf6611aeb06d781dfbb85cdad35a04ef839c65e14e8920564a5c9f014b048d
SHA512 6e641fcd5e93584a87adc1e9c9ad6b4e7bcebd49f325128087d135c8260d57bef55b9cfa78b1499cd97f0c711ae9d5a3327845c12effa978eb13d3a8971d88b8

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

MD5 a8a405d9721e5a83a9ed23ece0bfb95d
SHA1 19c70a5ded247f80cd80b066b756de4af4a7c6cd
SHA256 9ad46ab8c9a73e1236574c5b1a24e3833663aec1054a6aeca4af8fbc35d60b4f
SHA512 1ca7fa0ab17940e8112617ab6f2c38f14931e86aa4f71d0e5651e3df49aa7d7190f927abdcadd48b9d9633185a55fb10d91defa2b8ca89d06455aa24b959b45d

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

MD5 2930c042c9ee5e07f321f2134a0c7edc
SHA1 ee39f41eaf6ce3c8d917a89e65959414ae0088e6
SHA256 a328475bbb730da292b83ed6cabbdbfc0616f042296f0c6fa356c5368ffc1309
SHA512 2da91d5effc116d8c8661c2a99f1d9c2aaffda0f776551dc7ad1911fdb2765591e5b441b9a1fe0090bcda8ed24d180b563ed2c127676cf1de40001e4b15b5506

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-13 06:47

Reported

2024-08-13 06:49

Platform

win10v2004-20240802-en

Max time kernel

108s

Max time network

109s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.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\biudfw.exe N/A
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\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.exe

"C:\Users\Admin\AppData\Local\Temp\6bb73a3ecda5d7f7fcdb2a9be988f6e0N.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 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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
US 8.8.8.8:53 133.211.185.52.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
KR 218.54.47.76:11170 tcp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp

Files

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

MD5 0d2d6c3456512740f9e074c6af30b821
SHA1 0d484fd4063e38f6cf31a1e9d568b32e39b27a42
SHA256 2dbaa4b3c5a1f88a3ca13d8c82f6c72c5da27d67d1fefd3d08cd29d05238f454
SHA512 a9795e966eb5be471041243434e007edfd26df6c68da0ebcddf2d39819459bfaeb75f0f31fb61e953a78b9c07cf2cb1ab4d97d4aba73ca0aa11e7467dc6aaefb

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

MD5 a8a405d9721e5a83a9ed23ece0bfb95d
SHA1 19c70a5ded247f80cd80b066b756de4af4a7c6cd
SHA256 9ad46ab8c9a73e1236574c5b1a24e3833663aec1054a6aeca4af8fbc35d60b4f
SHA512 1ca7fa0ab17940e8112617ab6f2c38f14931e86aa4f71d0e5651e3df49aa7d7190f927abdcadd48b9d9633185a55fb10d91defa2b8ca89d06455aa24b959b45d

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

MD5 2930c042c9ee5e07f321f2134a0c7edc
SHA1 ee39f41eaf6ce3c8d917a89e65959414ae0088e6
SHA256 a328475bbb730da292b83ed6cabbdbfc0616f042296f0c6fa356c5368ffc1309
SHA512 2da91d5effc116d8c8661c2a99f1d9c2aaffda0f776551dc7ad1911fdb2765591e5b441b9a1fe0090bcda8ed24d180b563ed2c127676cf1de40001e4b15b5506