Malware Analysis Report

2024-10-24 17:09

Sample ID 240904-1zakfsyclg
Target a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4
SHA256 a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4
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

a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4

Threat Level: Known bad

The file a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4 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 behavior: AddClipboardFormatListener

Suspicious use of WriteProcessMemory

Checks processor information in registry

Modifies registry class

Enumerates system info in registry

Suspicious use of SetWindowsHookEx

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-04 22:04

Signatures

Suspicious Office macro

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-04 22:04

Reported

2024-09-04 22:05

Platform

win7-20240708-en

Max time kernel

16s

Max time network

18s

Command Line

"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4.xls

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\rundll32.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:\Windows\SysWOW64\rundll32.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.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\a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4.xls

C:\Windows\SysWOW64\rundll32.exe

"C:\Windows\system32\rundll32.exe" C:\Users\Public\Documents\CgWl.txt,DllRegisterServer

Network

Country Destination Domain Proto
US 8.8.8.8:53 skill.fashion udp
US 8.8.8.8:53 syracuse.best udp

Files

memory/2368-1-0x0000000072A7D000-0x0000000072A88000-memory.dmp

memory/2368-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

memory/2368-2-0x0000000072A7D000-0x0000000072A88000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-04 22:04

Reported

2024-09-04 22:05

Platform

win10v2004-20240802-en

Max time kernel

59s

Max time network

35s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4.xls"

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

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

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000_Classes\Local Settings C:\Windows\explorer.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4728 wrote to memory of 2656 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\explorer.exe
PID 4728 wrote to memory of 2656 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\explorer.exe
PID 1108 wrote to memory of 1348 N/A C:\Windows\explorer.exe C:\Windows\System32\WScript.exe
PID 1108 wrote to memory of 1348 N/A C:\Windows\explorer.exe C:\Windows\System32\WScript.exe

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\a79c44d70d375a1114be86656363f59bfd2e3f675f090ef124a47e4e87e042d4.xls"

C:\Windows\explorer.exe

explorer.exe C:\Users\Public\Documents\YrkHXr.vbs

C:\Windows\explorer.exe

C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding

C:\Windows\System32\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Public\Documents\YrkHXr.vbs"

Network

Country Destination Domain Proto
US 8.8.8.8:53 roaming.officeapps.live.com udp
GB 52.109.28.47:443 roaming.officeapps.live.com tcp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 18.89.109.52.in-addr.arpa udp
US 8.8.8.8:53 47.28.109.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 skill.fashion udp
US 8.8.8.8:53 8.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 71.190.18.2.in-addr.arpa udp

Files

memory/4728-0-0x00007FFEB2110000-0x00007FFEB2120000-memory.dmp

memory/4728-1-0x00007FFEF212D000-0x00007FFEF212E000-memory.dmp

memory/4728-4-0x00007FFEB2110000-0x00007FFEB2120000-memory.dmp

memory/4728-3-0x00007FFEB2110000-0x00007FFEB2120000-memory.dmp

memory/4728-2-0x00007FFEB2110000-0x00007FFEB2120000-memory.dmp

memory/4728-5-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-6-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-7-0x00007FFEB2110000-0x00007FFEB2120000-memory.dmp

memory/4728-9-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-11-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-15-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-14-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-16-0x00007FFEAFCD0000-0x00007FFEAFCE0000-memory.dmp

memory/4728-13-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-17-0x00007FFEAFCD0000-0x00007FFEAFCE0000-memory.dmp

memory/4728-12-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-10-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-8-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

C:\Users\Public\Documents\YrkHXr.vbs

MD5 e44f54f266828b01033e537ef1ea23d3
SHA1 98695dacefc757ef56d39f0eda3200f7a3708c52
SHA256 8b66942c59fa01cea50ed02e8fc9fed096fa8c981ef8e16dc4a5a216271ebd60
SHA512 65e7e53b287df0ca76f38514f1739d020ed9c91583708e821ec806094c3d5ce8f36fc4e4eba6b4fffc7aab625c430e06121d3035371ccc2a4cddfbf2076f72be

memory/4728-29-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-30-0x00007FFEF212D000-0x00007FFEF212E000-memory.dmp

memory/4728-31-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp

memory/4728-32-0x00007FFEF2090000-0x00007FFEF2285000-memory.dmp