Malware Analysis Report

2025-01-22 16:08

Sample ID 241111-vtd3ssvrbq
Target a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c
SHA256 a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c
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

a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c

Threat Level: Known bad

The file a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c 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

Enumerates system info in registry

Checks processor information in registry

Suspicious behavior: AddClipboardFormatListener

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-11 17:16

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 17:16

Reported

2024-11-11 17:19

Platform

win7-20240729-en

Max time kernel

136s

Max time network

147s

Command Line

"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c.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\a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c.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.almoeqatar.com udp
US 162.240.156.207:443 www.almoeqatar.com tcp
US 162.240.156.207:443 www.almoeqatar.com tcp
US 162.240.156.207:443 www.almoeqatar.com tcp
US 162.240.156.207:443 www.almoeqatar.com tcp
US 8.8.8.8:53 www.ayelet.info udp
US 104.21.90.173:80 www.ayelet.info tcp
US 8.8.8.8:53 www.lavameapp.com.ar udp
US 173.236.211.175:80 www.lavameapp.com.ar tcp
US 173.236.211.175:443 www.lavameapp.com.ar tcp
US 8.8.8.8:53 lista33rivera.uy udp
US 192.185.88.146:80 lista33rivera.uy tcp
US 8.8.8.8:53 cenaf.com.co udp
US 162.241.61.153:80 cenaf.com.co tcp
US 8.8.8.8:53 www.microsoft.com udp
US 23.192.22.93:80 www.microsoft.com tcp
US 8.8.8.8:53 crl.microsoft.com udp
GB 2.19.117.22:80 crl.microsoft.com tcp

Files

memory/2716-1-0x0000000071D4D000-0x0000000071D58000-memory.dmp

memory/2716-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

C:\Users\Admin\rfs.dll

MD5 8713dd892ec0930f713e13141920c5ad
SHA1 a3e081efb5b6c974622ac191f8412f8b4f995b6e
SHA256 cfd81c97ae0c2d0a50e698d7dd7b5f7aa323ce219c7c56ab49bbab85bab2d0fb
SHA512 1c76c7e9b5d4fd7f354f3c727ccbd5ee93c94cecb0654e7af757d5eb9992fa186cd03c4915cf1f8b5d1b3ab9461ddb01b51da3b0f7bea6411314ecd962306a4f

memory/2716-20-0x0000000071D4D000-0x0000000071D58000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-11 17:16

Reported

2024-11-11 17:19

Platform

win10v2004-20241007-en

Max time kernel

133s

Max time network

135s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c.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 opened \REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0 C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
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

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\a55d81070dbde3d02222cb8ea15b9f07dfc1bd6d89953c1c52df715813753e7c.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 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 roaming.officeapps.live.com udp
NL 52.109.89.19:443 roaming.officeapps.live.com tcp
US 8.8.8.8:53 97.32.109.52.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 19.89.109.52.in-addr.arpa udp
US 8.8.8.8:53 www.almoeqatar.com udp
US 162.240.156.207:443 www.almoeqatar.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 207.156.240.162.in-addr.arpa udp
US 8.8.8.8:53 32.169.19.2.in-addr.arpa udp
US 8.8.8.8:53 www.ayelet.info udp
US 172.67.202.176:80 www.ayelet.info tcp
US 8.8.8.8:53 www.lavameapp.com.ar udp
US 8.8.8.8:53 176.202.67.172.in-addr.arpa udp
US 173.236.211.175:80 www.lavameapp.com.ar tcp
US 173.236.211.175:443 www.lavameapp.com.ar tcp
US 8.8.8.8:53 175.211.236.173.in-addr.arpa udp
US 8.8.8.8:53 lista33rivera.uy udp
US 192.185.88.146:80 lista33rivera.uy tcp
US 8.8.8.8:53 cenaf.com.co udp
US 162.241.61.153:80 cenaf.com.co tcp
US 8.8.8.8:53 146.88.185.192.in-addr.arpa udp
US 8.8.8.8:53 153.61.241.162.in-addr.arpa udp
US 8.8.8.8:53 25.73.42.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 75.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 104.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

memory/1400-3-0x00007FFED9230000-0x00007FFED9240000-memory.dmp

memory/1400-0-0x00007FFED9230000-0x00007FFED9240000-memory.dmp

memory/1400-2-0x00007FFED9230000-0x00007FFED9240000-memory.dmp

memory/1400-1-0x00007FFF1924D000-0x00007FFF1924E000-memory.dmp

memory/1400-5-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-6-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-9-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-14-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-15-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-16-0x00007FFED6A80000-0x00007FFED6A90000-memory.dmp

memory/1400-13-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-17-0x00007FFED6A80000-0x00007FFED6A90000-memory.dmp

memory/1400-12-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-21-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-22-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-20-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-19-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-18-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-11-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-10-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-8-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-7-0x00007FFED9230000-0x00007FFED9240000-memory.dmp

memory/1400-4-0x00007FFED9230000-0x00007FFED9240000-memory.dmp

memory/1400-36-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-37-0x00007FFF1924D000-0x00007FFF1924E000-memory.dmp

memory/1400-38-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

memory/1400-42-0x00007FFF191B0000-0x00007FFF193A5000-memory.dmp

C:\Users\Admin\rfs.dll

MD5 8713dd892ec0930f713e13141920c5ad
SHA1 a3e081efb5b6c974622ac191f8412f8b4f995b6e
SHA256 cfd81c97ae0c2d0a50e698d7dd7b5f7aa323ce219c7c56ab49bbab85bab2d0fb
SHA512 1c76c7e9b5d4fd7f354f3c727ccbd5ee93c94cecb0654e7af757d5eb9992fa186cd03c4915cf1f8b5d1b3ab9461ddb01b51da3b0f7bea6411314ecd962306a4f

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

MD5 91f70ca6c8190e2c456a0059e152abaf
SHA1 5d49a2d37e9c0156b11e370203df010b4ee103fe
SHA256 30049553bf8be899416150d06f9485529d9df060c0d6da9975bdfb33cec6fb45
SHA512 8c8826af2cc3c1f75c61d7e29bcebe2ef35ed77ada5f2dae148f4d93619a704e42484095685441b33dffc70616822435c5457591c08f492581f2223b9853741a