Malware Analysis Report

2025-05-28 18:51

Sample ID 250111-f9fh8syqgj
Target df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe
SHA256 df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f
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

df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f

Threat Level: Known bad

The file df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader collection downloader evasion spyware stealer

Guloader,Cloudeye

Guloader family

Disables Task Manager via registry modification

Reads user/profile data of web browsers

Reads user/profile data of local email clients

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

Enumerates physical storage devices

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Suspicious use of WriteProcessMemory

outlook_office_path

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

outlook_win_path

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-11 05:34

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 05:34

Reported

2025-01-11 05:36

Platform

win7-20241023-en

Max time kernel

10s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.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\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

"C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nst6CC9.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/2928-15-0x00000000037C0000-0x00000000061D6000-memory.dmp

memory/2928-20-0x00000000037C0000-0x00000000061D6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-11 05:34

Reported

2025-01-11 05:36

Platform

win10v2004-20241007-en

Max time kernel

147s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.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-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.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\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.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\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

"C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe"

C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe

"C:\Users\Admin\AppData\Local\Temp\df4f955eb7e72870bf18d39f3dfe1fad5fb9093a080e65f315d215bfec94cc2f.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 5.114.82.104.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.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 142.250.178.3:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
US 8.8.8.8:53 238.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 35.200.250.142.in-addr.arpa udp
US 8.8.8.8:53 3.178.250.142.in-addr.arpa udp
GB 142.250.200.35:80 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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
BR 132.226.247.73:80 checkip.dyndns.org tcp
US 8.8.8.8:53 73.247.226.132.in-addr.arpa udp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 104.21.96.1:443 reallyfreegeoip.org tcp
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 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 8.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsvBAF5.tmp\System.dll

MD5 0d7ad4f45dc6f5aa87f606d0331c6901
SHA1 48df0911f0484cbe2a8cdd5362140b63c41ee457
SHA256 3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca
SHA512 c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

memory/956-13-0x00000000032A0000-0x0000000005CB6000-memory.dmp

memory/956-14-0x0000000077991000-0x0000000077AB1000-memory.dmp

memory/956-15-0x0000000074685000-0x0000000074686000-memory.dmp

memory/956-16-0x00000000032A0000-0x0000000005CB6000-memory.dmp

memory/2996-17-0x00000000016E0000-0x00000000040F6000-memory.dmp

memory/2996-30-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/2996-31-0x0000000000480000-0x00000000016D4000-memory.dmp

memory/2996-32-0x00000000016E0000-0x00000000040F6000-memory.dmp

memory/2996-33-0x0000000000480000-0x000000000049E000-memory.dmp

memory/2996-34-0x0000000036ED0000-0x0000000037474000-memory.dmp

memory/2996-35-0x0000000037480000-0x000000003751C000-memory.dmp

memory/2996-36-0x0000000037880000-0x0000000037912000-memory.dmp

memory/2996-37-0x0000000037920000-0x0000000037970000-memory.dmp

memory/2996-38-0x0000000037A70000-0x0000000037C32000-memory.dmp

memory/2996-39-0x0000000034B10000-0x0000000034B1A000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2025-01-11 05:34

Reported

2025-01-11 05:36

Platform

win7-20240903-en

Max time kernel

121s

Max time network

123s

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 2572 -s 220

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2025-01-11 05:34

Reported

2025-01-11 05:36

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 868 wrote to memory of 380 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 868 wrote to memory of 380 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 868 wrote to memory of 380 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 460 -p 380 -ip 380

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 380 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 86.49.80.91.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 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 8.153.16.2.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

N/A