Malware Analysis Report

2024-11-16 13:26

Sample ID 240811-jvym2s1fpk
Target 899b29c5620b35ed01f26ee936fc2524_JaffaCakes118
SHA256 75ea76bdcff9f550c267497e50b596ef25e7b98ec8c1c4452d5a8fb18a9dd47d
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

75ea76bdcff9f550c267497e50b596ef25e7b98ec8c1c4452d5a8fb18a9dd47d

Threat Level: Known bad

The file 899b29c5620b35ed01f26ee936fc2524_JaffaCakes118 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

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-11 08:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-11 08:00

Reported

2024-08-11 08:02

Platform

win7-20240708-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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/2404-0-0x0000000001100000-0x0000000001135000-memory.dmp

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

MD5 995f51e5c298295f4381d284130834bf
SHA1 01c707635da0eb2957eaa588e91b3ed4ae3ec7ab
SHA256 31da0bea03db239c8588a731df975c6ddfe92f215065862297ed0381c4d143e5
SHA512 457ca47b18328ffed83798820c90b2d6264b0940e2f5a3271e56ed784124b9349431dca209ad744fa654bf06fbedcd66c2d9364055e44e242d5d92a0c1f3a289

memory/2404-6-0x00000000003D0000-0x0000000000405000-memory.dmp

memory/2472-11-0x00000000013D0000-0x0000000001405000-memory.dmp

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

MD5 b1f9b3379d50172642cd7be1e1a02970
SHA1 54325d07893b9cadf105cedc506c30a0c850d385
SHA256 60c0238f3511645ddd13a8be7a8d94f8515440a98d296360b8155830a8381ac7
SHA512 e460759afb64690d29ec94937dc32469eac31795742c4b924d7e77b3dd844673e14f836876dce524e99886663ea4ab96d07a17e9e26f6bd05bb16536d600b2b7

memory/2404-19-0x0000000001100000-0x0000000001135000-memory.dmp

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

MD5 55e10a9af74d3f3fa5ae3cb7ff5ad9d4
SHA1 449221fd8d7196a54de2bd583625d8d1b64db56a
SHA256 a945a44cfe50423c01f26a16445ed177a347052e791364a9cb7de6bcaa18f3c1
SHA512 4af5ba74467b4c61302ea9571f19346c05f911843f2c6153fcd9a7340f9bc6e1f8867cdb72ec7ba0dc4930199aa5c302711ad5da9fd35241839418f6e70a515a

memory/2472-22-0x00000000013D0000-0x0000000001405000-memory.dmp

memory/2472-24-0x00000000013D0000-0x0000000001405000-memory.dmp

memory/2472-30-0x00000000013D0000-0x0000000001405000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-11 08:00

Reported

2024-08-11 08:02

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\899b29c5620b35ed01f26ee936fc2524_JaffaCakes118.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 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
KR 218.54.47.74:11150 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
KR 218.54.47.76:11170 tcp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
KR 218.54.47.77:11150 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/1908-0-0x0000000000340000-0x0000000000375000-memory.dmp

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

MD5 ceb9b2dfdeba334805dbc552fdf98bc7
SHA1 b0ab6f06346e824542a2475f5193a2c6608c2b47
SHA256 9fc4c4d30e4c5ba9b843827b0833b78f25159203a2922e5d59b63fe5fdad5985
SHA512 24b162587c74d1b3140ff1f60daf7b7a6e1aa2b547aa27e5e898176b04fb201c6212a8b750729231ef6a85ecd388cca59d3830a5c4e42a9aa9cfc868ea175c8b

memory/1652-13-0x0000000000070000-0x00000000000A5000-memory.dmp

memory/1908-15-0x0000000000340000-0x0000000000375000-memory.dmp

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

MD5 b1f9b3379d50172642cd7be1e1a02970
SHA1 54325d07893b9cadf105cedc506c30a0c850d385
SHA256 60c0238f3511645ddd13a8be7a8d94f8515440a98d296360b8155830a8381ac7
SHA512 e460759afb64690d29ec94937dc32469eac31795742c4b924d7e77b3dd844673e14f836876dce524e99886663ea4ab96d07a17e9e26f6bd05bb16536d600b2b7

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

MD5 55e10a9af74d3f3fa5ae3cb7ff5ad9d4
SHA1 449221fd8d7196a54de2bd583625d8d1b64db56a
SHA256 a945a44cfe50423c01f26a16445ed177a347052e791364a9cb7de6bcaa18f3c1
SHA512 4af5ba74467b4c61302ea9571f19346c05f911843f2c6153fcd9a7340f9bc6e1f8867cdb72ec7ba0dc4930199aa5c302711ad5da9fd35241839418f6e70a515a

memory/1652-18-0x0000000000070000-0x00000000000A5000-memory.dmp

memory/1652-20-0x0000000000070000-0x00000000000A5000-memory.dmp

memory/1652-27-0x0000000000070000-0x00000000000A5000-memory.dmp