Malware Analysis Report

2024-11-16 13:27

Sample ID 240731-jjvf9atglj
Target 8b539a06f73be7631c06097dd2537e00N.exe
SHA256 6edf4b4fd4c9444373d4cc6a9d1022a174c7088361c7212d5e7877eb030d150c
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

6edf4b4fd4c9444373d4cc6a9d1022a174c7088361c7212d5e7877eb030d150c

Threat Level: Known bad

The file 8b539a06f73be7631c06097dd2537e00N.exe was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Urelas family

Deletes itself

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-31 07:42

Signatures

Urelas family

urelas

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-31 07:42

Reported

2024-07-31 07:44

Platform

win7-20240729-en

Max time kernel

89s

Max time network

89s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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\8b539a06f73be7631c06097dd2537e00N.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\8b539a06f73be7631c06097dd2537e00N.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\8b539a06f73be7631c06097dd2537e00N.exe

"C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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 657b2d57ea7bde323c4ab5c99875e274
SHA1 d934746fe090eb58fbcde2554f02e106a7380614
SHA256 f3ae40b7e2b80cb7825bb3566bfe178e8854c05e331d01a8d3ed9b1921fbe7b1
SHA512 48cd249ca789c62ea6dba0dc402fb5575edcdcc1e7f7abb4fc40ee8373b701a7ba200037200fb1878bb9ed9ff1fa30129ce7b5dee4f061f0bdab2e1124907a89

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

MD5 31429775ef6629e8cfb9db58991f6b72
SHA1 ab996535ed2155db6bb71fe93aa58f2b97517117
SHA256 44e501989e3e5bd3c85d7fd4dad7cb4c5f2110bf1986084b1251124ad03884f7
SHA512 8174bbbee728ac71f41b6a1fc24b9ad53b4444f5ca64652672d35a14e80f1bc0c8ea3c8ee64385d1c76063a11a4a53c8acdbbcf9b82abe4a155cce68556f16c7

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

MD5 2930c042c9ee5e07f321f2134a0c7edc
SHA1 ee39f41eaf6ce3c8d917a89e65959414ae0088e6
SHA256 a328475bbb730da292b83ed6cabbdbfc0616f042296f0c6fa356c5368ffc1309
SHA512 2da91d5effc116d8c8661c2a99f1d9c2aaffda0f776551dc7ad1911fdb2765591e5b441b9a1fe0090bcda8ed24d180b563ed2c127676cf1de40001e4b15b5506

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-31 07:42

Reported

2024-07-31 07:44

Platform

win10v2004-20240730-en

Max time kernel

95s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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\8b539a06f73be7631c06097dd2537e00N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.exe

"C:\Users\Admin\AppData\Local\Temp\8b539a06f73be7631c06097dd2537e00N.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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
KR 218.54.47.76:11170 tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

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

MD5 168eb6fbac21f9ee4c6c8bdffb92b0c9
SHA1 a8ae033932a7e85d4921e01345796dc1eb441fa7
SHA256 3a76d440cb8a2e4ac952ce3c38016bb74d5d4cdbf06e4bb5ef70ff1267839ca6
SHA512 c20ad48fa8bbd8043126c6580e34cdfd7cf5948c969de1debd101b7ab73d33d6605d611ef83989f3791ad4d4f339c6b5675c1f530feca6b8f83063df76cb62bc

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

MD5 31429775ef6629e8cfb9db58991f6b72
SHA1 ab996535ed2155db6bb71fe93aa58f2b97517117
SHA256 44e501989e3e5bd3c85d7fd4dad7cb4c5f2110bf1986084b1251124ad03884f7
SHA512 8174bbbee728ac71f41b6a1fc24b9ad53b4444f5ca64652672d35a14e80f1bc0c8ea3c8ee64385d1c76063a11a4a53c8acdbbcf9b82abe4a155cce68556f16c7

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

MD5 2930c042c9ee5e07f321f2134a0c7edc
SHA1 ee39f41eaf6ce3c8d917a89e65959414ae0088e6
SHA256 a328475bbb730da292b83ed6cabbdbfc0616f042296f0c6fa356c5368ffc1309
SHA512 2da91d5effc116d8c8661c2a99f1d9c2aaffda0f776551dc7ad1911fdb2765591e5b441b9a1fe0090bcda8ed24d180b563ed2c127676cf1de40001e4b15b5506