Malware Analysis Report

2024-11-16 13:26

Sample ID 240806-k1wajsvfnp
Target 888259a11434a8a9946875f80ab54aa0N.exe
SHA256 41a59ae071264aa21234503aa0d242738bd3e43240de80ef9dca815a3cee1dd0
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

41a59ae071264aa21234503aa0d242738bd3e43240de80ef9dca815a3cee1dd0

Threat Level: Known bad

The file 888259a11434a8a9946875f80ab54aa0N.exe was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Loads dropped DLL

Deletes itself

Executes dropped EXE

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

2024-08-06 09:04

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-06 09:04

Reported

2024-08-06 09:06

Platform

win7-20240705-en

Max time kernel

89s

Max time network

78s

Command Line

"C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.exe

"C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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/2672-0-0x00000000012F0000-0x0000000001315000-memory.dmp

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

MD5 ff7c1f9a10d50bc9d3bbf580ed72b73b
SHA1 792d50e490934f73b80fd4c2c349519e6fac5fa1
SHA256 433c6a7e8a9b3a11d6f060258300ed603e3ef5ffc5ac014518ed4b78c68501ca
SHA512 c8998b8d8e57f4312db098d35b58c9ff7f131cdef1a74ae7000081c1875795707735e60f527063ee94b05fa343ee2536320ceab7307cd8874917f1c59d6088a6

memory/2860-10-0x0000000001270000-0x0000000001295000-memory.dmp

memory/2672-9-0x0000000000DF0000-0x0000000000E15000-memory.dmp

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

MD5 b8ecf69a1a03d699d7f0d675f0aa84d0
SHA1 6e1033e87704c0358789166bbe030f83f9af203b
SHA256 82d48432831b2c601fe1489af0536b36bad2ecf1792edab30b6e174456701ee0
SHA512 ba51e854ffc0abc67485f51a2a712e1c5f3734506b38d150dd4945a12a7a800f7f37ae25119c00f8df46d302b1b062fd94022b4dd61ebb1a8294638f9d773ae1

memory/2672-19-0x00000000012F0000-0x0000000001315000-memory.dmp

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

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

memory/2860-22-0x0000000001270000-0x0000000001295000-memory.dmp

memory/2860-24-0x0000000001270000-0x0000000001295000-memory.dmp

memory/2860-31-0x0000000001270000-0x0000000001295000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-06 09:04

Reported

2024-08-06 09:06

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.exe"

Signatures

Urelas

trojan urelas

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.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\888259a11434a8a9946875f80ab54aa0N.exe

"C:\Users\Admin\AppData\Local\Temp\888259a11434a8a9946875f80ab54aa0N.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 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
KR 218.54.47.76:11120 tcp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/4316-0-0x0000000000C20000-0x0000000000C45000-memory.dmp

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

MD5 4d055443425f7ee64eda99436d3a6a6e
SHA1 9175edf41f3146b629978ca1186f52e8ad225fde
SHA256 c96affdd27cb706ac8b95f0f60c913110f478cf744bb29cd3c52c8278cd1f83f
SHA512 b51d229f3a37212df7a4fb4713cc30a5b0e30efb397b88b7e1397dc94f65820bbc2e7d27880df78bed70f39ac23f094f7b55f1030376f5ce403cd859efaac7d2

memory/1364-15-0x0000000000B50000-0x0000000000B75000-memory.dmp

memory/4316-18-0x0000000000C20000-0x0000000000C45000-memory.dmp

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

MD5 b8ecf69a1a03d699d7f0d675f0aa84d0
SHA1 6e1033e87704c0358789166bbe030f83f9af203b
SHA256 82d48432831b2c601fe1489af0536b36bad2ecf1792edab30b6e174456701ee0
SHA512 ba51e854ffc0abc67485f51a2a712e1c5f3734506b38d150dd4945a12a7a800f7f37ae25119c00f8df46d302b1b062fd94022b4dd61ebb1a8294638f9d773ae1

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

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

memory/1364-21-0x0000000000B50000-0x0000000000B75000-memory.dmp

memory/1364-23-0x0000000000B50000-0x0000000000B75000-memory.dmp

memory/1364-29-0x0000000000B50000-0x0000000000B75000-memory.dmp