Malware Analysis Report

2024-11-15 10:20

Sample ID 241106-elcl1athrc
Target fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe
SHA256 fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d
Tags
discovery guloader downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d

Threat Level: Known bad

The file fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-06 04:01

Signatures

Unsigned PE

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

Analysis: behavioral4

Detonation Overview

Submitted

2024-11-06 04:01

Reported

2024-11-06 04:03

Platform

win10v2004-20241007-en

Max time kernel

133s

Max time network

145s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3956 wrote to memory of 804 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3956 wrote to memory of 804 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3956 wrote to memory of 804 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 804 -ip 804

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 804 -s 612

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 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.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

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-06 04:01

Reported

2024-11-06 04:03

Platform

win7-20240903-en

Max time kernel

11s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe

"C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsy81A0.tmp\System.dll

MD5 192639861e3dc2dc5c08bb8f8c7260d5
SHA1 58d30e460609e22fa0098bc27d928b689ef9af78
SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
SHA512 6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

memory/1792-16-0x00000000035C0000-0x0000000005EDF000-memory.dmp

memory/1792-22-0x00000000035C0000-0x0000000005EDF000-memory.dmp

memory/1792-16-0x00000000035C0000-0x0000000005EDF000-memory.dmp

memory/1792-22-0x00000000035C0000-0x0000000005EDF000-memory.dmp

memory/1792-16-0x00000000035C0000-0x0000000005EDF000-memory.dmp

memory/1792-22-0x00000000035C0000-0x0000000005EDF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-06 04:01

Reported

2024-11-06 04:03

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Fonts\anderssons\svrdliljernes.elu C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe N/A
File opened for modification C:\Windows\resources\0409\Landgafol76\bojanerne.ini C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.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\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe

"C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe"

C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe

"C:\Users\Admin\AppData\Local\Temp\fc73b5466e3c2c0d5d9dc70a8b210eb617ac2fdf74a8caee778d57fdb197690d.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 kambud.biz udp
PL 185.17.43.223:443 kambud.biz tcp
US 8.8.8.8:53 223.43.17.185.in-addr.arpa udp
US 8.8.8.8:53 233.38.18.104.in-addr.arpa udp
PL 185.17.43.223:443 kambud.biz tcp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
PL 185.17.43.223:443 kambud.biz tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp
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
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp
PL 185.17.43.223:443 kambud.biz tcp

Files

C:\Users\Admin\AppData\Local\Temp\nsf6C49.tmp\System.dll

MD5 192639861e3dc2dc5c08bb8f8c7260d5
SHA1 58d30e460609e22fa0098bc27d928b689ef9af78
SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
SHA512 6e573d8b2ef6ed719e271fd0b2fd9cd451f61fc9a9459330108d6d7a65a0f64016303318cad787aa1d5334ba670d8f1c7c13074e1be550b4a316963ecc465cdc

memory/2468-14-0x00000000033B0000-0x0000000005CCF000-memory.dmp

memory/2468-15-0x00000000774B1000-0x00000000775D1000-memory.dmp

memory/2468-16-0x00000000741A5000-0x00000000741A6000-memory.dmp

memory/4380-17-0x0000000000400000-0x0000000001654000-memory.dmp

memory/2468-18-0x00000000033B0000-0x0000000005CCF000-memory.dmp

memory/4380-19-0x0000000001660000-0x0000000003F7F000-memory.dmp

memory/4380-26-0x0000000000400000-0x0000000001654000-memory.dmp

memory/4380-27-0x0000000001660000-0x0000000003F7F000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-11-06 04:01

Reported

2024-11-06 04:03

Platform

win7-20241010-en

Max time kernel

118s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\System.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1704 -s 220

Network

N/A

Files

N/A