Malware Analysis Report

2024-11-16 13:25

Sample ID 241009-3w583a1gjf
Target 5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N
SHA256 5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270
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

5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270

Threat Level: Known bad

The file 5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N was found to be: Known bad.

Malicious Activity Summary

urelas discovery trojan

Urelas

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Deletes itself

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-09 23:52

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-09 23:52

Reported

2024-10-09 23:55

Platform

win7-20240903-en

Max time kernel

120s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.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\vujop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\goloc.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\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\vujop.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\goloc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2792 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\vujop.exe
PID 2792 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\vujop.exe
PID 2792 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\vujop.exe
PID 2792 wrote to memory of 2140 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\vujop.exe
PID 2792 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 2792 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 2792 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 2792 wrote to memory of 1540 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 2140 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\vujop.exe C:\Users\Admin\AppData\Local\Temp\goloc.exe
PID 2140 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\vujop.exe C:\Users\Admin\AppData\Local\Temp\goloc.exe
PID 2140 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\vujop.exe C:\Users\Admin\AppData\Local\Temp\goloc.exe
PID 2140 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\vujop.exe C:\Users\Admin\AppData\Local\Temp\goloc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe

"C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe"

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

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

C:\Windows\SysWOW64\cmd.exe

cmd /c ""C:\Users\Admin\AppData\Local\Temp\_uinsey.bat" "

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

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

Network

Country Destination Domain Proto
KR 218.54.31.226:11300 tcp
KR 1.234.83.146:11170 tcp
KR 218.54.31.166:11300 tcp
JP 133.242.129.155:11300 tcp

Files

memory/2792-0-0x0000000001270000-0x00000000012F1000-memory.dmp

memory/2792-1-0x0000000000020000-0x0000000000021000-memory.dmp

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

MD5 c0abef04c814a58048ed027f151c1cc7
SHA1 b2de7a8512d0be5ae67f163014319c04d10ba8c8
SHA256 ef1ce5ce6e71397be16e24943fe76c5179a3b81278a67f3de39f62d69dc1b1c0
SHA512 e67bc255dadf9b26f66108530ab07233a3fe405c8515b4b51d1d7745b2e231b3aacc64d501671f26f405f3044286b77db693ebc1a79398cfe641b01a28a39199

memory/2792-8-0x0000000002880000-0x0000000002901000-memory.dmp

memory/2140-12-0x0000000000020000-0x0000000000021000-memory.dmp

memory/2140-11-0x0000000001300000-0x0000000001381000-memory.dmp

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

MD5 32354e899a0b0e705444b16283b4852c
SHA1 62c929701c0adb4b9a1282be2ce2d7bd6d8d4c82
SHA256 0f4e7e02c7af0373aae9b08b8fb496e77746efcfe25d1c5e919e5fdfcc87a747
SHA512 d4584bb2545ee5f9b4a0c98c6c9de9c380e0b15341dceb0cef5350f29d68dd4ee2c79f2a358251c94706041a89e11f1aa5073a30b6a72c27dff4f6a23a5f3e37

memory/2792-21-0x0000000001270000-0x00000000012F1000-memory.dmp

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

MD5 2fba2fef7d51f5ac10c073f1c955044a
SHA1 cce19ad873a802ff7738c53fabc4b12d777fc565
SHA256 29b5062f424aa6b30c3a9f68a74b03d65337c918c67dc897f6cac2c499f79ee8
SHA512 a075479cca8960e1ddc35f6b335abb6e7d3ad553f0f2c4db9c56d2d0fce652422b6fbe1182b3f7e70bc7eb54b83f11e4420ef02d7daeb8aaf66e069aeec81dea

memory/2140-24-0x0000000001300000-0x0000000001381000-memory.dmp

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

MD5 9065347d69eb30b89d1f6eb5d2237069
SHA1 b7c3787de85ec53ec6412102cf821d85a83d0bd9
SHA256 655db42bff0ac6e52670ba2e3bbd070e2e1b7b7cf65001d44fd23bc97ce16683
SHA512 ffbb62ae1706652937432e40403f035883f97f7c9a990d462a739bbbc47ebdd574773e6c821cd25fb41782ba36f07af41c12bd583675aab3af9cdf9ecaf022be

memory/2140-42-0x0000000001300000-0x0000000001381000-memory.dmp

memory/2904-40-0x0000000000030000-0x00000000000C9000-memory.dmp

memory/2140-39-0x0000000000D90000-0x0000000000E29000-memory.dmp

memory/2904-43-0x0000000000030000-0x00000000000C9000-memory.dmp

memory/2904-47-0x0000000000030000-0x00000000000C9000-memory.dmp

memory/2904-48-0x0000000000030000-0x00000000000C9000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-09 23:52

Reported

2024-10-09 23:55

Platform

win10v2004-20241007-en

Max time kernel

119s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.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\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\rykyb.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rykyb.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.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\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rykyb.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\wyfop.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\wyfop.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1848 wrote to memory of 552 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\rykyb.exe
PID 1848 wrote to memory of 552 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\rykyb.exe
PID 1848 wrote to memory of 552 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Users\Admin\AppData\Local\Temp\rykyb.exe
PID 1848 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 1848 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 1848 wrote to memory of 1824 N/A C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe C:\Windows\SysWOW64\cmd.exe
PID 552 wrote to memory of 4700 N/A C:\Users\Admin\AppData\Local\Temp\rykyb.exe C:\Users\Admin\AppData\Local\Temp\wyfop.exe
PID 552 wrote to memory of 4700 N/A C:\Users\Admin\AppData\Local\Temp\rykyb.exe C:\Users\Admin\AppData\Local\Temp\wyfop.exe
PID 552 wrote to memory of 4700 N/A C:\Users\Admin\AppData\Local\Temp\rykyb.exe C:\Users\Admin\AppData\Local\Temp\wyfop.exe

Processes

C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe

"C:\Users\Admin\AppData\Local\Temp\5fb5a636c16bc38c693ee40f06fe2022ffb992ee23b36ba245feb87de7ee6270N.exe"

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

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

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\_uinsey.bat" "

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 67.209.201.84.in-addr.arpa udp
KR 218.54.31.226:11300 tcp
KR 1.234.83.146:11170 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 105.209.201.84.in-addr.arpa udp
KR 218.54.31.166:11300 tcp
US 8.8.8.8:53 70.209.201.84.in-addr.arpa udp
JP 133.242.129.155:11300 tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/1848-0-0x0000000000C60000-0x0000000000CE1000-memory.dmp

memory/1848-1-0x00000000007F0000-0x00000000007F1000-memory.dmp

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

MD5 9d7a91ce6357b0984d65a9fd9d5794d1
SHA1 e87c318e541d7e2de7a897f4c9071eecf1f6d446
SHA256 cfbc431d5c847d39a03c2f410d8b7de9c8441e540961e99b07087008aa4e82c5
SHA512 71520ea69d9498238d1c00929bfef28cc8dde36cb32270e641c32aec33af03aba2314e3b1b1a4d99cf1ae10947def2b0be8d40f58b4dabfa0c64d9242f9d87c8

memory/1848-16-0x0000000000C60000-0x0000000000CE1000-memory.dmp

memory/552-15-0x0000000000550000-0x0000000000551000-memory.dmp

memory/552-14-0x0000000000AD0000-0x0000000000B51000-memory.dmp

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

MD5 32354e899a0b0e705444b16283b4852c
SHA1 62c929701c0adb4b9a1282be2ce2d7bd6d8d4c82
SHA256 0f4e7e02c7af0373aae9b08b8fb496e77746efcfe25d1c5e919e5fdfcc87a747
SHA512 d4584bb2545ee5f9b4a0c98c6c9de9c380e0b15341dceb0cef5350f29d68dd4ee2c79f2a358251c94706041a89e11f1aa5073a30b6a72c27dff4f6a23a5f3e37

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

MD5 e989d87a66ef2a69056d1c9a32df0040
SHA1 cfb965201c6847f87c63805f0c6f4e9a5d025985
SHA256 f88fe34c6a7036fe244d8e0650f7c2e6c8791586a305fb61982dbbe8c575e66c
SHA512 7394b6b1c4ab496c79be754bd018f31ca9baf233d87ac0cdfee1e5d650732ea0a902290bf30ffb5228f1ce7187dcbaee2e46511d03edd6da33270df34c5e6dda

memory/552-19-0x0000000000AD0000-0x0000000000B51000-memory.dmp

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

MD5 d69ab04fa2d8f73775c360ac3fb70848
SHA1 15a5850ff9b9b75f7f13c3a5ba0142aeb36bee7b
SHA256 da35bc28f55dda903ed40260006a0781ff078e00e638cdb2ba0d256ecb8dfe35
SHA512 8dfb2838e0cdba6ec3497c415885d144ec61f035f400cd8e14e44be3bc143eb48c1aa17d3a3e96fb10e7522d48350f9e61053d214eb8fe57ec248b081f5f7742

memory/4700-36-0x00000000006B0000-0x0000000000749000-memory.dmp

memory/4700-38-0x00000000006B0000-0x0000000000749000-memory.dmp

memory/4700-37-0x0000000000610000-0x0000000000612000-memory.dmp

memory/552-42-0x0000000000AD0000-0x0000000000B51000-memory.dmp

memory/4700-45-0x0000000000610000-0x0000000000612000-memory.dmp

memory/4700-44-0x00000000006B0000-0x0000000000749000-memory.dmp

memory/4700-46-0x00000000006B0000-0x0000000000749000-memory.dmp