Malware Analysis Report

2025-04-03 14:26

Sample ID 241219-e6pr3azjbp
Target fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
SHA256 fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963
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

fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963

Threat Level: Known bad

The file fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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

Loads dropped DLL

Reads user/profile data of local email clients

Reads user/profile data of web browsers

Accesses Microsoft Outlook profiles

Looks up external IP address via web service

Legitimate hosting services abused for malware hosting/C2

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in System32 directory

Enumerates physical storage devices

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

outlook_win_path

outlook_office_path

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-19 04:33

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

2024-12-19 04:33

Reported

2024-12-19 04:35

Platform

win7-20240708-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2160 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2160 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2160 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2160 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2160 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2160 wrote to memory of 2736 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe

Processes

C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe

"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe"

C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe

"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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
DE 193.122.6.168:80 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
FR 2.16.149.13:80 crl.microsoft.com tcp
US 8.8.8.8:53 www.microsoft.com udp
GB 95.100.245.144:80 www.microsoft.com tcp

Files

\Users\Admin\AppData\Local\Temp\nso62E9.tmp\System.dll

MD5 ee260c45e97b62a5e42f17460d406068
SHA1 df35f6300a03c4d3d3bd69752574426296b78695
SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

memory/2160-16-0x0000000002D20000-0x0000000003F18000-memory.dmp

memory/2160-17-0x0000000076F91000-0x0000000077092000-memory.dmp

memory/2160-18-0x0000000076F90000-0x0000000077139000-memory.dmp

memory/2160-19-0x0000000002D20000-0x0000000003F18000-memory.dmp

memory/2736-20-0x0000000076F90000-0x0000000077139000-memory.dmp

memory/2736-42-0x0000000000460000-0x00000000014C2000-memory.dmp

memory/2736-43-0x0000000000460000-0x000000000047E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-19 04:33

Reported

2024-12-19 04:35

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.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\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

outlook_office_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

outlook_win_path

Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe

"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe"

C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe

"C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 182.129.81.91.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
US 8.8.8.8:53 67.179.250.142.in-addr.arpa udp
US 8.8.8.8:53 238.75.250.142.in-addr.arpa 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 8.8.8.8:53 225.74.250.142.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
JP 132.226.8.169:80 checkip.dyndns.org tcp
US 8.8.8.8:53 169.8.226.132.in-addr.arpa udp
US 8.8.8.8:53 reallyfreegeoip.org udp
US 104.21.67.152:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 152.67.21.104.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa 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 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 86.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsz7928.tmp\System.dll

MD5 ee260c45e97b62a5e42f17460d406068
SHA1 df35f6300a03c4d3d3bd69752574426296b78695
SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

memory/4440-14-0x0000000002A60000-0x0000000003C58000-memory.dmp

memory/4440-15-0x0000000077B01000-0x0000000077C21000-memory.dmp

memory/4440-16-0x0000000010004000-0x0000000010005000-memory.dmp

memory/4440-17-0x0000000002A60000-0x0000000003C58000-memory.dmp

memory/4888-18-0x00000000016C0000-0x00000000028B8000-memory.dmp

memory/4888-19-0x0000000077B88000-0x0000000077B89000-memory.dmp

memory/4888-20-0x0000000077BA5000-0x0000000077BA6000-memory.dmp

memory/4888-30-0x00000000016C0000-0x00000000028B8000-memory.dmp

memory/4888-34-0x0000000000460000-0x00000000016B4000-memory.dmp

memory/4888-35-0x0000000000460000-0x000000000047E000-memory.dmp

memory/4888-36-0x0000000035580000-0x0000000035B24000-memory.dmp

memory/4888-37-0x0000000035B30000-0x0000000035BCC000-memory.dmp

memory/4888-39-0x0000000035FD0000-0x0000000036062000-memory.dmp

memory/4888-40-0x0000000035D50000-0x0000000035DA0000-memory.dmp

memory/4888-41-0x0000000077B01000-0x0000000077C21000-memory.dmp

memory/4888-42-0x00000000361A0000-0x0000000036362000-memory.dmp

memory/4888-43-0x0000000036420000-0x000000003642A000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-19 04:33

Reported

2024-12-19 04:36

Platform

win7-20241010-en

Max time kernel

119s

Max time network

124s

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 1668 -s 228

Network

N/A

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-19 04:33

Reported

2024-12-19 04:35

Platform

win10v2004-20241007-en

Max time kernel

96s

Max time network

145s

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 1700 wrote to memory of 208 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1700 wrote to memory of 208 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1700 wrote to memory of 208 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 408 -p 208 -ip 208

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 208 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

N/A