Malware Analysis Report

2025-05-28 18:51

Sample ID 250111-geda3azjhl
Target e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe
SHA256 e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa
Tags
discovery guloader downloader
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: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa

Threat Level: Known bad

The file e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader

Guloader family

Guloader,Cloudeye

Loads dropped DLL

Legitimate hosting services abused for malware hosting/C2

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Enumerates physical storage devices

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-11 05:42

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-11 05:42

Reported

2025-01-11 05:45

Platform

win7-20240903-en

Max time kernel

122s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe"

Signatures

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\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe

"C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2616 -s 28

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nstDE6E.tmp\System.dll

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

memory/2616-13-0x00000000039E0000-0x0000000005AF7000-memory.dmp

memory/2616-14-0x00000000039E0000-0x0000000005AF7000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-11 05:42

Reported

2025-01-11 05:45

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A 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\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe

"C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe"

C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe

"C:\Users\Admin\AppData\Local\Temp\e5fd95536576d21b43b1552aed3040ea366375b5a952c333dd89f1ed251c12aa.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.179.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.200.35:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.200.35:80 o.pki.goog tcp
US 8.8.8.8:53 35.200.250.142.in-addr.arpa udp
US 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 216.58.212.193:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 193.212.58.216.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 59.238.56.23.in-addr.arpa udp
US 8.8.8.8:53 60.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

C:\Users\Admin\AppData\Local\Temp\nsc8B59.tmp\System.dll

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

memory/4956-11-0x0000000004270000-0x0000000006387000-memory.dmp

memory/4956-12-0x0000000077311000-0x0000000077431000-memory.dmp

memory/4956-13-0x0000000073F65000-0x0000000073F66000-memory.dmp

memory/4956-14-0x0000000004270000-0x0000000006387000-memory.dmp

memory/3472-15-0x0000000001700000-0x0000000003817000-memory.dmp

memory/3472-28-0x00000000004A0000-0x00000000016F4000-memory.dmp

memory/3472-29-0x0000000001700000-0x0000000003817000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2025-01-11 05:42

Reported

2025-01-11 05:45

Platform

win7-20240903-en

Max time kernel

118s

Max time network

120s

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 2916 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2025-01-11 05:42

Reported

2025-01-11 05:45

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

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 2456 wrote to memory of 1996 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2456 wrote to memory of 1996 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2456 wrote to memory of 1996 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 424 -p 1996 -ip 1996

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1996 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 60.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.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 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 85.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 8.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 90.16.208.104.in-addr.arpa udp

Files

N/A