Malware Analysis Report

2025-04-03 14:26

Sample ID 241219-fa6alsymcv
Target fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
SHA256 fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963
Tags
discovery guloader 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: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

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 Overview

score
10/10

SHA256

fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963

Threat Level: Known bad

The file fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe was found to be: Known bad.

Malicious Activity Summary

discovery guloader downloader evasion spyware stealer collection

Guloader family

Guloader,Cloudeye

Disables Task Manager via registry modification

Reads user/profile data of local email clients

Loads dropped DLL

Reads user/profile data of web browsers

Accesses Microsoft Outlook profiles

Legitimate hosting services abused for malware hosting/C2

Looks up external IP address via web service

Suspicious use of NtCreateThreadExHideFromDebugger

Drops file in System32 directory

Suspicious use of SetThreadContext

Suspicious use of NtSetInformationThreadHideFromDebugger

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

Program crash

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

outlook_win_path

outlook_office_path

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-19 04:41

Signatures

Unsigned PE

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

Analysis: behavioral4

Detonation Overview

Submitted

2024-12-19 04:41

Reported

2024-12-19 04:43

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

137s

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 1608 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1608 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1608 wrote to memory of 1104 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 1104 -ip 1104

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1104 -s 612

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.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 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-19 04:41

Reported

2024-12-19 04:43

Platform

win7-20241010-en

Max time kernel

118s

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 2776 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2776 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2776 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2776 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2776 wrote to memory of 2636 N/A C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe
PID 2776 wrote to memory of 2636 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
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 www.microsoft.com udp
US 23.192.22.93:80 www.microsoft.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsj3026.tmp\System.dll

MD5 ee260c45e97b62a5e42f17460d406068
SHA1 df35f6300a03c4d3d3bd69752574426296b78695
SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

memory/2776-16-0x00000000025D0000-0x00000000037C8000-memory.dmp

memory/2776-17-0x00000000025D0000-0x00000000037C8000-memory.dmp

memory/2776-18-0x0000000077C71000-0x0000000077D72000-memory.dmp

memory/2776-19-0x0000000077C70000-0x0000000077E19000-memory.dmp

memory/2636-20-0x0000000077C70000-0x0000000077E19000-memory.dmp

memory/2776-21-0x00000000025D0000-0x00000000037C8000-memory.dmp

memory/2636-43-0x0000000000460000-0x00000000014C2000-memory.dmp

memory/2636-44-0x0000000000460000-0x000000000047E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-19 04:41

Reported

2024-12-19 04:43

Platform

win10v2004-20241007-en

Max time kernel

147s

Max time network

147s

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-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676 C:\Users\Admin\AppData\Local\Temp\fc94d179b05d50bcaa14523b241ee1652fde502bb7a3a27727e0892d39452963.exe N/A
Key opened \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\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-1-5-21-493223053-2004649691-1575712786-1000\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-1-5-21-493223053-2004649691-1575712786-1000\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-1-5-21-493223053-2004649691-1575712786-1000\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 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 88.210.23.2.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 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 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
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 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 reallyfreegeoip.org udp
US 172.67.177.134:443 reallyfreegeoip.org tcp
US 8.8.8.8:53 169.8.226.132.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 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsr65A0.tmp\System.dll

MD5 ee260c45e97b62a5e42f17460d406068
SHA1 df35f6300a03c4d3d3bd69752574426296b78695
SHA256 e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27
SHA512 a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

memory/3320-14-0x0000000002A60000-0x0000000003C58000-memory.dmp

memory/3320-15-0x0000000076E91000-0x0000000076FB1000-memory.dmp

memory/3320-16-0x0000000010004000-0x0000000010005000-memory.dmp

memory/3320-17-0x0000000002A60000-0x0000000003C58000-memory.dmp

memory/3320-18-0x0000000002A60000-0x0000000003C58000-memory.dmp

memory/4336-19-0x00000000016C0000-0x00000000028B8000-memory.dmp

memory/4336-20-0x0000000076F18000-0x0000000076F19000-memory.dmp

memory/4336-21-0x0000000076F35000-0x0000000076F36000-memory.dmp

memory/4336-31-0x00000000016C0000-0x00000000028B8000-memory.dmp

memory/4336-35-0x0000000000460000-0x00000000016B4000-memory.dmp

memory/4336-36-0x0000000000460000-0x00000000016B4000-memory.dmp

memory/4336-37-0x0000000000460000-0x000000000047E000-memory.dmp

memory/4336-38-0x0000000035730000-0x0000000035CD4000-memory.dmp

memory/4336-39-0x0000000035540000-0x00000000355DC000-memory.dmp

memory/4336-40-0x0000000035F80000-0x0000000036012000-memory.dmp

memory/4336-41-0x0000000036020000-0x0000000036070000-memory.dmp

memory/4336-42-0x0000000076E91000-0x0000000076FB1000-memory.dmp

memory/4336-43-0x00000000361A0000-0x0000000036362000-memory.dmp

memory/4336-44-0x0000000036420000-0x000000003642A000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-12-19 04:41

Reported

2024-12-19 04:43

Platform

win7-20240903-en

Max time kernel

15s

Max time network

16s

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 2236 -s 224

Network

N/A

Files

N/A