Malware Analysis Report

2024-11-16 13:25

Sample ID 241012-rfqynayepk
Target ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N
SHA256 ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2
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

ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2

Threat Level: Known bad

The file ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Loads dropped DLL

Deletes itself

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

2024-10-12 14:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-12 14:08

Reported

2024-10-12 14:10

Platform

win7-20240708-en

Max time kernel

118s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.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\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.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\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.exe

"C:\Users\Admin\AppData\Local\Temp\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.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/388-0-0x00000000001B0000-0x00000000001D5000-memory.dmp

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

MD5 3ed96de26435a95bd724dd8192abeef5
SHA1 d9931ad4d4716cae690a269f7048ff579a1a001a
SHA256 c50b0d466f3f79b624ef21297e89dfd462d06c54f57c4f9f4b7478a6894b45fb
SHA512 6f818ea0d5249969ee9bbab583bfe17b9432cb687279833c13012f67eb38c07fd3322c755a92546b3acd5409d6a352cf17adb0a3ad503b1f26855c5e8904aa3b

memory/388-6-0x0000000000480000-0x00000000004A5000-memory.dmp

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

MD5 52de364334f68538894034967dfa7b25
SHA1 d394b860ff927b3ea1504d8bbf73aaa61a450895
SHA256 32c8eaa5d1514a1b8920543cbb2e86686812ef8d678ab6a092686398679beb01
SHA512 45aeecea873ce57713bc49e65fb398f90a725ad1210e9b31feee0debe6a9df31c9c7345f1f5546b56cfa52c6ed1de0542ebf405aa0352ebed302bbc3b1407de5

memory/388-17-0x00000000001B0000-0x00000000001D5000-memory.dmp

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

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/592-20-0x0000000000250000-0x0000000000275000-memory.dmp

memory/592-22-0x0000000000250000-0x0000000000275000-memory.dmp

memory/592-29-0x0000000000250000-0x0000000000275000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-12 14:08

Reported

2024-10-12 14:10

Platform

win10v2004-20241007-en

Max time kernel

96s

Max time network

97s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.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\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.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\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.exe

"C:\Users\Admin\AppData\Local\Temp\ec95dfc127a1053672f3f078925436c9d3c52e72e6ea6678607f4a43bffc06d2N.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 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 98.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

memory/4624-0-0x0000000000FC0000-0x0000000000FE5000-memory.dmp

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

MD5 ba3d1928e8e5ce6b32367aa65fa19036
SHA1 0563de0c7c546cf5384f802cde98c42fde12d521
SHA256 0056215373ba8f7413f065cb7c9158dbe08e5bd5c6b4e8c8e763fcd3fff2c4cb
SHA512 e4b52506d6212805be8af805927d98020b77216e6f87c813e6266e23777f2b8c542ba216f328a624b21fc9cbcf690e7614f8b6fe3e6de20fa91a0f8eb3a7fed6

memory/2868-13-0x0000000000610000-0x0000000000635000-memory.dmp

memory/4624-18-0x0000000000FC0000-0x0000000000FE5000-memory.dmp

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

MD5 52de364334f68538894034967dfa7b25
SHA1 d394b860ff927b3ea1504d8bbf73aaa61a450895
SHA256 32c8eaa5d1514a1b8920543cbb2e86686812ef8d678ab6a092686398679beb01
SHA512 45aeecea873ce57713bc49e65fb398f90a725ad1210e9b31feee0debe6a9df31c9c7345f1f5546b56cfa52c6ed1de0542ebf405aa0352ebed302bbc3b1407de5

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

MD5 efd90b3ac908d5482af367de3a82184a
SHA1 de9f01d2ed0247b7b347e55c5a09721a60147fb9
SHA256 44f3db1bb73bb207a88008ae28d0399f888b5714ccccb2056f4148b4455e693d
SHA512 6e3355f895af1d81887d5750033c5a139e4a0e1c2c928aeef1fd37f9c191e754b1f524d252c229ea5e744dbef4dd0a8240d9d3443651d42de198e82a197afb02

memory/2868-21-0x0000000000610000-0x0000000000635000-memory.dmp

memory/2868-23-0x0000000000610000-0x0000000000635000-memory.dmp

memory/2868-30-0x0000000000610000-0x0000000000635000-memory.dmp