Malware Analysis Report

2024-11-16 13:28

Sample ID 240811-ze99xaxblk
Target 423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2
SHA256 423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2
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

423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2

Threat Level: Known bad

The file 423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2 was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Deletes itself

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-11 20:39

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-11 20:39

Reported

2024-08-11 20:41

Platform

win7-20240708-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.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\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\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.exe

"C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.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/2180-0-0x00000000000E0000-0x0000000000105000-memory.dmp

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

MD5 2f738185a59f3f2ad315c0294d55058f
SHA1 98ac72de23ec1e61fc5f708d983733698f4193b3
SHA256 3935b75f4cea5fc426366224b511f15140db14772dac97676f64bdec4f0797b3
SHA512 19d457040496f0b0feffdba68eb34bd63ef9e2642877eefc353e054b72b78e00b4c7e8bcf9e2cbf5dc0193c5e1d1b9bf445da5cb49b279e72518982ef074e891

memory/2180-6-0x0000000001DE0000-0x0000000001E05000-memory.dmp

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

MD5 dc9528c2cac3a23f7a87a7d540d91884
SHA1 256f6cf2ec410a56840e5fa3a5ca86f3b2d81154
SHA256 496f2b0744689091d6449a47f472fab995fb0c604c9a0d325a965731c5b1dcc7
SHA512 c2b6ebeabae13ff4c113c03f528785bfde9d4619aa7cfe889cb299e011bfeeb10670b84b3231fbea08cea44daa485dd3adf533fde1d2f262e29cad686651ca57

memory/768-17-0x0000000001350000-0x0000000001375000-memory.dmp

memory/2180-18-0x00000000000E0000-0x0000000000105000-memory.dmp

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

MD5 657ce9e5dd337971e44dfb9cb3fbf7dd
SHA1 026734083afaa4b7d298781b26a72ac9b67ac831
SHA256 3138d6a5526aaa3cb120adb309f2a27d5fec03c8aa088268a1c7f378dd722472
SHA512 79aab9648bb19ebe5946dd9edd7e11a70ea7b340a1c7539ccff3d3d13de2932bf5ea9077c079208e09bf5d632f00541e52d4926c5c80f86741effb8d86acd26d

memory/768-21-0x0000000001350000-0x0000000001375000-memory.dmp

memory/768-23-0x0000000001350000-0x0000000001375000-memory.dmp

memory/768-30-0x0000000001350000-0x0000000001375000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-11 20:39

Reported

2024-08-11 20:41

Platform

win10v2004-20240802-en

Max time kernel

143s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.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:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\biudfw.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.exe

"C:\Users\Admin\AppData\Local\Temp\423255a1ca7dcbbb040cdd6f80ce7f2caf8bdbbab50b48623c57d68caaabdcd2.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 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.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 56.126.166.20.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
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
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 10.28.171.150.in-addr.arpa udp

Files

memory/368-0-0x0000000000F80000-0x0000000000FA5000-memory.dmp

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

MD5 ef24c3202c900696cb111e1de6dcea0a
SHA1 42ce4a39f71ec9758101a5de1143cb66165197a4
SHA256 c8f4e6cac07936178f94ea6c3b47d110f4e94f7825f6019332a1d2edcd8d9baf
SHA512 28aebfd26932648a6575b0cd99568f00c46278f66a0a2906918d76b573ad876af194505a992fa4141077c045e2cd38c5d366c626942a042de1f26d7ec44f0efd

memory/2568-15-0x00000000001F0000-0x0000000000215000-memory.dmp

memory/368-18-0x0000000000F80000-0x0000000000FA5000-memory.dmp

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

MD5 dc9528c2cac3a23f7a87a7d540d91884
SHA1 256f6cf2ec410a56840e5fa3a5ca86f3b2d81154
SHA256 496f2b0744689091d6449a47f472fab995fb0c604c9a0d325a965731c5b1dcc7
SHA512 c2b6ebeabae13ff4c113c03f528785bfde9d4619aa7cfe889cb299e011bfeeb10670b84b3231fbea08cea44daa485dd3adf533fde1d2f262e29cad686651ca57

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

MD5 657ce9e5dd337971e44dfb9cb3fbf7dd
SHA1 026734083afaa4b7d298781b26a72ac9b67ac831
SHA256 3138d6a5526aaa3cb120adb309f2a27d5fec03c8aa088268a1c7f378dd722472
SHA512 79aab9648bb19ebe5946dd9edd7e11a70ea7b340a1c7539ccff3d3d13de2932bf5ea9077c079208e09bf5d632f00541e52d4926c5c80f86741effb8d86acd26d

memory/2568-21-0x00000000001F0000-0x0000000000215000-memory.dmp

memory/2568-23-0x00000000001F0000-0x0000000000215000-memory.dmp

memory/2568-30-0x00000000001F0000-0x0000000000215000-memory.dmp