Malware Analysis Report

2025-04-03 14:27

Sample ID 241218-nwa1laxmb1
Target PAYMENTADVICE750013-10129943-81347-pdf.exe
SHA256 0ff51f1bfcef0cabf76af8a2c9bb5c01aef4940a97c9b5cebe83cddf62d5be77
Tags
guloader discovery downloader evasion spyware stealer collection
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

0ff51f1bfcef0cabf76af8a2c9bb5c01aef4940a97c9b5cebe83cddf62d5be77

Threat Level: Known bad

The file PAYMENTADVICE750013-10129943-81347-pdf.exe was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader evasion spyware stealer collection

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

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Legitimate hosting services abused for malware hosting/C2

Drops file in System32 directory

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Enumerates physical storage devices

outlook_office_path

Suspicious behavior: MapViewOfSection

outlook_win_path

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-18 11:44

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

2024-12-18 11:44

Reported

2024-12-18 11:46

Platform

win7-20240903-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe"

Signatures

Guloader family

guloader

Guloader,Cloudeye

downloader guloader

Disables Task Manager via registry modification

evasion

Reads user/profile data of web browsers

spyware stealer

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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\hjemmecomputeren.Pot C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2076 set thread context of 1872 N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe

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\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe

"C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe"

C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe

"C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
FR 142.250.75.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
FR 142.250.179.67:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
FR 142.250.179.67:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
FR 142.250.74.225:443 drive.usercontent.google.com tcp
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 reallyfreegeoip.org udp
US 104.21.67.152:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.19.252.143:80 crl.microsoft.com tcp
US 8.8.8.8:53 www.microsoft.com udp
GB 2.18.109.131:80 www.microsoft.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsy7FCB.tmp\System.dll

MD5 ee260c45e97b62a5e42f17460d406068
SHA1 df35f6300a03c4d3d3bd69752574426296b78695
SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

memory/2076-16-0x0000000002DF0000-0x0000000005C76000-memory.dmp

memory/2076-18-0x00000000774C0000-0x0000000077669000-memory.dmp

memory/2076-17-0x00000000774C1000-0x00000000775C2000-memory.dmp

memory/2076-19-0x0000000002DF0000-0x0000000005C76000-memory.dmp

memory/1872-20-0x00000000774C0000-0x0000000077669000-memory.dmp

memory/1872-40-0x0000000000460000-0x00000000014C2000-memory.dmp

memory/1872-41-0x0000000000460000-0x00000000014C2000-memory.dmp

memory/1872-42-0x0000000000460000-0x000000000047E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-18 11:44

Reported

2024-12-18 11:46

Platform

win10v2004-20241007-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.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-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.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

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\hjemmecomputeren.Pot C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3528 set thread context of 3100 N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe

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\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe

"C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe"

C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe

"C:\Users\Admin\AppData\Local\Temp\PAYMENTADVICE750013-10129943-81347-pdf.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
FR 142.250.75.238:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
FR 142.250.179.67:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
FR 142.250.179.67:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
FR 142.250.74.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 238.75.250.142.in-addr.arpa udp
US 8.8.8.8:53 67.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 225.74.250.142.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 reallyfreegeoip.org udp
US 172.67.177.134:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 73.247.226.132.in-addr.arpa udp
US 8.8.8.8:53 134.177.67.172.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 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 20.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsy8FCD.tmp\System.dll

MD5 ee260c45e97b62a5e42f17460d406068
SHA1 df35f6300a03c4d3d3bd69752574426296b78695
SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

memory/3528-14-0x0000000002A60000-0x00000000058E6000-memory.dmp

memory/3528-15-0x00000000777F1000-0x0000000077911000-memory.dmp

memory/3528-16-0x0000000010004000-0x0000000010005000-memory.dmp

memory/3528-17-0x0000000002A60000-0x00000000058E6000-memory.dmp

memory/3100-18-0x00000000016C0000-0x0000000004546000-memory.dmp

memory/3100-31-0x0000000000460000-0x00000000016B4000-memory.dmp

memory/3100-32-0x0000000000460000-0x000000000047E000-memory.dmp

memory/3100-33-0x0000000037250000-0x00000000377F4000-memory.dmp

memory/3100-34-0x0000000037850000-0x00000000378EC000-memory.dmp

memory/3100-35-0x0000000037D00000-0x0000000037D92000-memory.dmp

memory/3100-36-0x0000000037DD0000-0x0000000037E20000-memory.dmp

memory/3100-38-0x00000000016C0000-0x0000000004546000-memory.dmp

memory/3100-39-0x0000000037F70000-0x0000000038132000-memory.dmp

memory/3100-40-0x00000000381F0000-0x00000000381FA000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-18 11:44

Reported

2024-12-18 11:46

Platform

win7-20241010-en

Max time kernel

118s

Max time network

119s

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 2028 -s 224

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-18 11:44

Reported

2024-12-18 11:46

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

149s

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 1820 wrote to memory of 1996 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1820 wrote to memory of 1996 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1820 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 184 -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 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 85.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

N/A