Malware Analysis Report

2025-03-15 07:23

Sample ID 241111-zvkdeszkel
Target 74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b
SHA256 74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b
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

74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b

Threat Level: Known bad

The file 74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b 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 SetWindowsHookEx

Suspicious use of WriteProcessMemory

Checks processor information in registry

Suspicious use of FindShellTrayWindow

Enumerates system info in registry

Suspicious behavior: AddClipboardFormatListener

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 21:02

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 21:02

Reported

2024-11-11 21:04

Platform

win7-20240903-en

Max time kernel

118s

Max time network

121s

Command Line

"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b.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\74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b.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 beetle-j.jp udp
JP 219.100.169.159:80 beetle-j.jp tcp
US 8.8.8.8:53 brutobrasil.com.br udp
US 209.126.103.109:443 brutobrasil.com.br tcp
US 209.126.103.109:443 brutobrasil.com.br tcp
US 209.126.103.109:443 brutobrasil.com.br tcp
US 209.126.103.109:443 brutobrasil.com.br tcp
US 8.8.8.8:53 e3technology.in udp
US 3.33.130.190:80 e3technology.in tcp

Files

memory/2684-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

memory/2684-1-0x00000000720CD000-0x00000000720D8000-memory.dmp

C:\Users\Admin\rfs.dll

MD5 e89f75f918dbdcee28604d4e09dd71d7
SHA1 f9d9055e9878723a12063b47d4a1a5f58c3eb1e9
SHA256 6dc9c7fc93bb488bb0520a6c780a8d3c0fb5486a4711aca49b4c53fac7393023
SHA512 8df0ab2e3679b64a6174deff4259ae5680f88e3ae307e0ea2dfff88ec4ba14f3477c9fe3a5aa5da3a8e857601170a5108ed75f6d6975958ac7a314e4a336aed0

memory/2684-7-0x00000000720CD000-0x00000000720D8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 21:02

Reported

2024-11-11 21:04

Platform

win10v2004-20241007-en

Max time kernel

133s

Max time network

140s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b.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\74ae4fcaf6fce510942f298840e2ffd98d185e6276f1da168b5057478ee5c71b.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 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 46.28.109.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
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 beetle-j.jp udp
JP 219.100.169.159:80 beetle-j.jp tcp
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 brutobrasil.com.br udp
US 209.126.103.109:443 brutobrasil.com.br tcp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 159.169.100.219.in-addr.arpa udp
US 8.8.8.8:53 109.103.126.209.in-addr.arpa udp
US 8.8.8.8:53 23.149.64.172.in-addr.arpa udp
US 8.8.8.8:53 233.38.18.104.in-addr.arpa udp
US 8.8.8.8:53 www.brutobrasil.com.br udp
US 209.126.103.109:443 www.brutobrasil.com.br tcp
US 8.8.8.8:53 e3technology.in udp
US 3.33.130.190:80 e3technology.in tcp
US 8.8.8.8:53 190.130.33.3.in-addr.arpa udp
US 8.8.8.8:53 169.117.168.52.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 107.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 69.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/3628-1-0x00007FF820F2D000-0x00007FF820F2E000-memory.dmp

memory/3628-0-0x00007FF7E0F10000-0x00007FF7E0F20000-memory.dmp

memory/3628-4-0x00007FF7E0F10000-0x00007FF7E0F20000-memory.dmp

memory/3628-3-0x00007FF7E0F10000-0x00007FF7E0F20000-memory.dmp

memory/3628-2-0x00007FF7E0F10000-0x00007FF7E0F20000-memory.dmp

memory/3628-6-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-5-0x00007FF7E0F10000-0x00007FF7E0F20000-memory.dmp

memory/3628-9-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-10-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-8-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-7-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-11-0x00007FF7DEA90000-0x00007FF7DEAA0000-memory.dmp

memory/3628-12-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-13-0x00007FF7DEA90000-0x00007FF7DEAA0000-memory.dmp

memory/3628-16-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-17-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-19-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-18-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-15-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-14-0x00007FF820E90000-0x00007FF821085000-memory.dmp

C:\Users\Admin\rfs.dll

MD5 e89f75f918dbdcee28604d4e09dd71d7
SHA1 f9d9055e9878723a12063b47d4a1a5f58c3eb1e9
SHA256 6dc9c7fc93bb488bb0520a6c780a8d3c0fb5486a4711aca49b4c53fac7393023
SHA512 8df0ab2e3679b64a6174deff4259ae5680f88e3ae307e0ea2dfff88ec4ba14f3477c9fe3a5aa5da3a8e857601170a5108ed75f6d6975958ac7a314e4a336aed0

memory/3628-40-0x00007FF820E90000-0x00007FF821085000-memory.dmp

memory/3628-41-0x00007FF820F2D000-0x00007FF820F2E000-memory.dmp

memory/3628-42-0x00007FF820E90000-0x00007FF821085000-memory.dmp

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

MD5 a7c1e36d422713d5fac0eee1e65d0b65
SHA1 b31d249b8cd69bad6eb27912960e37e5c38eaba9
SHA256 3f9d0b2f11d10f46b7342c896bd6c43d671bb36ad63923c538da778cc70c9d99
SHA512 8c72cc25ad9f0e1567cb39b9db85a9699f554a2295f4d86aef5671d2fce622aa20656705ae0834dd033425fa113570bbada34f439fbeb58af61c1a6c6c4fdd10