Malware Analysis Report

2024-11-16 13:28

Sample ID 240804-xzwwxaxgke
Target f87e5eddb3eda809b99172e27a87d780N.exe
SHA256 4beed96c08ad1d96cc0ff51824516df57f4c89bbbfb9871d927a212ce4e515f6
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

4beed96c08ad1d96cc0ff51824516df57f4c89bbbfb9871d927a212ce4e515f6

Threat Level: Known bad

The file f87e5eddb3eda809b99172e27a87d780N.exe 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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-04 19:18

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-04 19:18

Reported

2024-08-04 19:20

Platform

win7-20240708-en

Max time kernel

119s

Max time network

78s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.exe

"C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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/2348-0-0x0000000000860000-0x0000000000887000-memory.dmp

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

MD5 d377769221221b5a0f511ca4ca0937f9
SHA1 1230bae19be680b4ac964e29f39b9f19af8e04c6
SHA256 1fcd20cf407243b33afc8eaecee206098daad693955a8cd3b0aa827fb604cb2c
SHA512 667574792c916485a495114f9f2da875b4448d39a48144d1ffe58fe08521c5713c06993c847fba9c806ab1dec22f9ffe358b3a2107419c57cc187c10462925c9

memory/2348-8-0x0000000000830000-0x0000000000857000-memory.dmp

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

MD5 6fc0c05cabe218158b4741328fb67ad5
SHA1 6521a3064345d741674afb7ec89607e3968c715b
SHA256 e1ff8b4e5b970ba9b9ea37ae911dac4131da0e4973ca47811c9a7b54e047a37c
SHA512 805e847b7da572a72f30a9c7a1640eddf062ca6829964bf48ca82c4fa4db3bc81896579c00e4bda8b118a2162e5e8d961248210d415db59be962231074230b1b

memory/2348-19-0x0000000000860000-0x0000000000887000-memory.dmp

memory/3032-17-0x0000000000990000-0x00000000009B7000-memory.dmp

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

MD5 1c9b2720af0ca9528b47898d9c7f4799
SHA1 80495f16e333f54ecc700252323c2a7cb7d751e1
SHA256 d1ea9a17b5a635a121e82e7963d3b134f74050da9debcd40c9622f50c5d38fe5
SHA512 5afe876f2cd887458656b1747bce08d03f26ef286bcc83efa93e0111be856d0564bee4d6ef5637c167626bac121f7371b69c7952502d47784ac9ad568bf53eac

memory/3032-22-0x0000000000990000-0x00000000009B7000-memory.dmp

memory/3032-24-0x0000000000990000-0x00000000009B7000-memory.dmp

memory/3032-31-0x0000000000990000-0x00000000009B7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-04 19:18

Reported

2024-08-04 19:20

Platform

win10v2004-20240802-en

Max time kernel

92s

Max time network

101s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.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\f87e5eddb3eda809b99172e27a87d780N.exe

"C:\Users\Admin\AppData\Local\Temp\f87e5eddb3eda809b99172e27a87d780N.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 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 24.58.20.217.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
KR 218.54.47.77:11150 tcp

Files

memory/4636-0-0x0000000000E50000-0x0000000000E77000-memory.dmp

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

MD5 3aa2a6b21974f4b5e54c9af3f9e95ea4
SHA1 972c37b024aca222cd3f229b9dbe379e0ba57292
SHA256 a1dcd1fc041d13f836e95f7d4047693895008575eb47ece8f11c348ea62d8ee6
SHA512 827d6ad87052fab15973807c397b46cc4454e072a3b9ed484720eb0c450d79d7e67b285c766c504034cf00ce3abf81e3064abf9126b569c59dd5fb3cf682b339

memory/3468-15-0x0000000000650000-0x0000000000677000-memory.dmp

memory/4636-18-0x0000000000E50000-0x0000000000E77000-memory.dmp

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

MD5 6fc0c05cabe218158b4741328fb67ad5
SHA1 6521a3064345d741674afb7ec89607e3968c715b
SHA256 e1ff8b4e5b970ba9b9ea37ae911dac4131da0e4973ca47811c9a7b54e047a37c
SHA512 805e847b7da572a72f30a9c7a1640eddf062ca6829964bf48ca82c4fa4db3bc81896579c00e4bda8b118a2162e5e8d961248210d415db59be962231074230b1b

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

MD5 1c9b2720af0ca9528b47898d9c7f4799
SHA1 80495f16e333f54ecc700252323c2a7cb7d751e1
SHA256 d1ea9a17b5a635a121e82e7963d3b134f74050da9debcd40c9622f50c5d38fe5
SHA512 5afe876f2cd887458656b1747bce08d03f26ef286bcc83efa93e0111be856d0564bee4d6ef5637c167626bac121f7371b69c7952502d47784ac9ad568bf53eac

memory/3468-21-0x0000000000650000-0x0000000000677000-memory.dmp

memory/3468-23-0x0000000000650000-0x0000000000677000-memory.dmp

memory/3468-30-0x0000000000650000-0x0000000000677000-memory.dmp