Malware Analysis Report

2025-01-22 16:10

Sample ID 241111-v4bqeswjgj
Target fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3
SHA256 fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3
Tags
macro xlm discovery
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 Overview

score
10/10

SHA256

fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3

Threat Level: Known bad

The file fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3 was found to be: Known bad.

Malicious Activity Summary

macro xlm discovery

Process spawned unexpected child process

Suspicious Office macro

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

Checks processor information in registry

Enumerates system info in registry

Suspicious behavior: AddClipboardFormatListener

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 17:32

Signatures

Suspicious Office macro

macro xlm
Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-11 17:32

Reported

2024-11-11 17:34

Platform

win7-20240903-en

Max time kernel

121s

Max time network

128s

Command Line

"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3.xlsm

Signatures

Process spawned unexpected child process

Description Indicator Process Target
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process N/A C:\Windows\SysWow64\regsvr32.exe C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWow64\regsvr32.exe N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE N/A

Processes

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE

"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3.xlsm

C:\Windows\SysWow64\regsvr32.exe

C:\Windows\SysWow64\regsvr32.exe -s ..\rfs.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.ajaxmatters.com udp
US 104.21.28.230:80 www.ajaxmatters.com tcp
US 104.21.28.230:443 www.ajaxmatters.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.187.227:80 c.pki.goog tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.19.117.18:80 crl.microsoft.com tcp

Files

memory/2968-1-0x0000000071FCD000-0x0000000071FD8000-memory.dmp

memory/2968-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

C:\Users\Admin\rfs.dll

MD5 4ed8ca5542b641fddd200acebadf4e3c
SHA1 41fd7fb6cb84805fbc229cbf13620f80a5008003
SHA256 3f03ee986c82c3be72da6272448f92d97426f53e07079334edeb502f6386cc33
SHA512 866719609b7200cdd4d97b6a83d7fb6424d3900b555e23d2db8744539b1ae204c0da0a5e595c676ee4cad7df3f743aad1e746c750cd30afe3a74d89bf188979a

memory/2968-26-0x0000000071FCD000-0x0000000071FD8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 17:32

Reported

2024-11-11 17:34

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

151s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3.xlsm"

Signatures

Process spawned unexpected child process

Description Indicator Process Target
Parent C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE is not expected to spawn this process N/A C:\Windows\SysWow64\regsvr32.exe C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWow64\regsvr32.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
Key opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A

Suspicious behavior: AddClipboardFormatListener

Description Indicator Process Target
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
N/A N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A

Processes

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\fee9b11a869311cea1ff31c82b209c92ea89f545cbf65347ce9dda7b79c82fd3.xlsm"

C:\Windows\SysWow64\regsvr32.exe

C:\Windows\SysWow64\regsvr32.exe -s ..\rfs.dll

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 106.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 roaming.officeapps.live.com udp
GB 52.109.32.7:443 roaming.officeapps.live.com tcp
US 8.8.8.8:53 www.ajaxmatters.com udp
US 8.8.8.8:53 97.32.109.52.in-addr.arpa udp
US 172.67.147.196:80 www.ajaxmatters.com tcp
US 172.67.147.196:443 www.ajaxmatters.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.187.227:80 c.pki.goog tcp
US 8.8.8.8:53 7.32.109.52.in-addr.arpa udp
US 8.8.8.8:53 196.147.67.172.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 26.73.42.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.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 72.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

memory/4560-1-0x00007FFC2D92D000-0x00007FFC2D92E000-memory.dmp

memory/4560-0-0x00007FFBED910000-0x00007FFBED920000-memory.dmp

memory/4560-3-0x00007FFBED910000-0x00007FFBED920000-memory.dmp

memory/4560-4-0x00007FFBED910000-0x00007FFBED920000-memory.dmp

memory/4560-5-0x00007FFBED910000-0x00007FFBED920000-memory.dmp

memory/4560-2-0x00007FFBED910000-0x00007FFBED920000-memory.dmp

memory/4560-7-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-6-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-11-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-10-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-9-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-12-0x00007FFBEB8B0000-0x00007FFBEB8C0000-memory.dmp

memory/4560-8-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-13-0x00007FFBEB8B0000-0x00007FFBEB8C0000-memory.dmp

memory/4560-14-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-16-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-15-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-18-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-19-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-17-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

C:\Users\Admin\rfs.dll

MD5 4ed8ca5542b641fddd200acebadf4e3c
SHA1 41fd7fb6cb84805fbc229cbf13620f80a5008003
SHA256 3f03ee986c82c3be72da6272448f92d97426f53e07079334edeb502f6386cc33
SHA512 866719609b7200cdd4d97b6a83d7fb6424d3900b555e23d2db8744539b1ae204c0da0a5e595c676ee4cad7df3f743aad1e746c750cd30afe3a74d89bf188979a

memory/4560-41-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

memory/4560-42-0x00007FFC2D92D000-0x00007FFC2D92E000-memory.dmp

memory/4560-46-0x00007FFC2D890000-0x00007FFC2DA85000-memory.dmp

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\b8ab77100df80ab2.customDestinations-ms

MD5 9060fe013c3d0fffb9db8e1fbdcf9b7f
SHA1 00d481fd2455f3a984a693376a28edccbe1befa1
SHA256 a74a999d60cc60aec39408899b9926aa55ae56b032f64961efa18223552261ff
SHA512 1358841afbc14431389cc6c8578604d9e26dae60cbc3c870a93e034744700966160ee6ebddc2fb306cb50886eda41d457ba1b2c5066c040fc255fff33e7453d2