Malware Analysis Report

2025-05-28 18:51

Sample ID 250111-f1qb3swkhx
Target d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe
SHA256 d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b
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

d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b

Threat Level: Known bad

The file d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Loads dropped DLL

Looks up external IP address via web service

Legitimate hosting services abused for malware hosting/C2

Accesses Microsoft Outlook profiles

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Program crash

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

Suspicious use of AdjustPrivilegeToken

outlook_office_path

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

Suspicious behavior: EnumeratesProcesses

outlook_win_path

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-11 05:20

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 05:20

Reported

2025-01-11 05:23

Platform

win7-20241023-en

Max time kernel

8s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe

"C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsyAC48.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/1788-15-0x0000000003570000-0x0000000004F53000-memory.dmp

memory/1788-20-0x0000000003570000-0x0000000004F53000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-11 05:20

Reported

2025-01-11 05:23

Platform

win10v2004-20241007-en

Max time kernel

147s

Max time network

136s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe

"C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe"

C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.exe

"C:\Users\Admin\AppData\Local\Temp\d314fe716123c0fac98d48d7d4acd4fe887217c2a9ad0fc96850235785f7f79b.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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 182.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.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 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 3.178.250.142.in-addr.arpa udp
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 8.8.8.8:53 193.212.58.216.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
DE 193.122.6.168:80 checkip.dyndns.org tcp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 104.21.96.1:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 168.6.122.193.in-addr.arpa udp
US 8.8.8.8:53 1.96.21.104.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 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 180.129.81.91.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsaAE62.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/1956-13-0x00000000033A0000-0x0000000004D83000-memory.dmp

memory/1956-14-0x00000000773C1000-0x00000000774E1000-memory.dmp

memory/1956-15-0x00000000740B5000-0x00000000740B6000-memory.dmp

memory/1956-16-0x00000000033A0000-0x0000000004D83000-memory.dmp

memory/3660-17-0x00000000016E0000-0x00000000030C3000-memory.dmp

memory/3660-18-0x0000000077448000-0x0000000077449000-memory.dmp

memory/3660-19-0x00000000016E0000-0x00000000030C3000-memory.dmp

memory/3660-20-0x0000000077465000-0x0000000077466000-memory.dmp

memory/3660-33-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/3660-34-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/3660-35-0x0000000000480000-0x000000000049E000-memory.dmp

memory/3660-36-0x0000000035E00000-0x00000000363A4000-memory.dmp

memory/3660-37-0x00000000363B0000-0x000000003644C000-memory.dmp

memory/3660-38-0x00000000773C1000-0x00000000774E1000-memory.dmp

memory/3660-39-0x0000000036790000-0x0000000036822000-memory.dmp

memory/3660-40-0x0000000036830000-0x0000000036880000-memory.dmp

memory/3660-41-0x00000000369B0000-0x0000000036B72000-memory.dmp

memory/3660-43-0x0000000036C30000-0x0000000036C3A000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2025-01-11 05:20

Reported

2025-01-11 05:23

Platform

win7-20240903-en

Max time kernel

117s

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 2312 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2025-01-11 05:20

Reported

2025-01-11 05:23

Platform

win10v2004-20241007-en

Max time kernel

94s

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 4324 wrote to memory of 4300 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4324 wrote to memory of 4300 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4324 wrote to memory of 4300 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 412 -p 4300 -ip 4300

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4300 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 134.130.81.91.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp

Files

N/A