Malware Analysis Report

2025-05-28 18:51

Sample ID 250111-ek4n4aspdy
Target 815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe
SHA256 815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a
Tags
discovery guloader collection downloader evasion spyware stealer
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

815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a

Threat Level: Known bad

The file 815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader collection downloader evasion spyware stealer

Guloader family

Guloader,Cloudeye

Disables Task Manager via registry modification

Loads dropped DLL

Reads user/profile data of web browsers

Reads user/profile data of local email clients

Accesses Microsoft Outlook profiles

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Program crash

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

outlook_office_path

Suspicious behavior: EnumeratesProcesses

outlook_win_path

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-11 04:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-11 04:00

Reported

2025-01-11 04:03

Platform

win7-20241010-en

Max time kernel

9s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.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\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe

"C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsdD589.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/2556-15-0x00000000037B0000-0x000000000501F000-memory.dmp

memory/2556-20-0x00000000037B0000-0x000000000501F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-11 04:00

Reported

2025-01-11 04:03

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Disables Task Manager via registry modification

evasion

Reads user/profile data of local email clients

spyware stealer

Reads user/profile data of web browsers

spyware stealer

Accesses Microsoft Outlook profiles

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

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

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A
N/A reallyfreegeoip.org N/A N/A
N/A reallyfreegeoip.org N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.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\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe

"C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe"

C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe

"C:\Users\Admin\AppData\Local\Temp\815d6b508fab5d16a8190a479fb4b72a3916d9afe21393eeb506098cb1a93c3a.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 172.217.169.78:443 drive.google.com tcp
US 8.8.8.8:53 78.169.217.172.in-addr.arpa udp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.178.3:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.178.3:80 o.pki.goog tcp
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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 193.212.58.216.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
US 193.122.130.0:80 checkip.dyndns.org tcp
US 8.8.8.8:53 0.130.122.193.in-addr.arpa udp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 104.21.112.1:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 1.112.21.104.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 133.130.81.91.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 175.117.168.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nso9DC8.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/2896-13-0x00000000032B0000-0x0000000004B1F000-memory.dmp

memory/2896-14-0x0000000077831000-0x0000000077951000-memory.dmp

memory/2896-15-0x0000000074525000-0x0000000074526000-memory.dmp

memory/2896-16-0x00000000032B0000-0x0000000004B1F000-memory.dmp

memory/2896-17-0x00000000032B0000-0x0000000004B1F000-memory.dmp

memory/4264-18-0x00000000016E0000-0x0000000002F4F000-memory.dmp

memory/4264-19-0x00000000778B8000-0x00000000778B9000-memory.dmp

memory/4264-20-0x00000000778D5000-0x00000000778D6000-memory.dmp

memory/4264-33-0x00000000016E0000-0x0000000002F4F000-memory.dmp

memory/4264-34-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/4264-35-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/4264-36-0x0000000000480000-0x000000000049E000-memory.dmp

memory/4264-37-0x0000000035B80000-0x0000000036124000-memory.dmp

memory/4264-38-0x0000000036130000-0x00000000361CC000-memory.dmp

memory/4264-39-0x0000000077831000-0x0000000077951000-memory.dmp

memory/4264-40-0x00000000365E0000-0x0000000036672000-memory.dmp

memory/4264-41-0x0000000036690000-0x00000000366E0000-memory.dmp

memory/4264-43-0x0000000036830000-0x00000000369F2000-memory.dmp

memory/4264-44-0x0000000036AB0000-0x0000000036ABA000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2025-01-11 04:00

Reported

2025-01-11 04:03

Platform

win7-20240729-en

Max time kernel

16s

Max time network

17s

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 2328 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2025-01-11 04:00

Reported

2025-01-11 04:03

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 2768 wrote to memory of 4644 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2768 wrote to memory of 4644 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2768 wrote to memory of 4644 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 4644 -ip 4644

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4644 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 134.130.81.91.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

N/A