Malware Analysis Report

2025-04-13 11:50

Sample ID 220119-e2mf5sfbd6
Target f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90
SHA256 f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90
Tags
bazarloader dropper loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90

Threat Level: Known bad

The file f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90 was found to be: Known bad.

Malicious Activity Summary

bazarloader dropper loader

Process spawned unexpected child process

Bazar Loader

Bazar/Team9 Loader payload

Blocklisted process makes network request

Loads dropped DLL

Enumerates system info in registry

Suspicious behavior: AddClipboardFormatListener

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Checks processor information in registry

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-01-19 04:26

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-19 04:26

Reported

2022-01-19 04:28

Platform

win10v2004-en-20220113

Max time kernel

149s

Max time network

153s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.xll"

Signatures

Bazar Loader

loader dropper bazarloader

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\SYSTEM32\rundll32.exe C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE

Bazar/Team9 Loader payload

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

Blocklisted process makes network request

Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\rundll32.exe N/A
N/A N/A C:\Windows\SYSTEM32\rundll32.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 WriteProcessMemory

Description Indicator Process Target
PID 1432 wrote to memory of 2932 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\SYSTEM32\rundll32.exe
PID 1432 wrote to memory of 2932 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\SYSTEM32\rundll32.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\f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.xll"

C:\Windows\SYSTEM32\rundll32.exe

rundll32 C:\Users\Admin\JavaObjectReflectO.dll , dopt

Network

Country Destination Domain Proto
UA 91.201.202.219:443 tcp
NL 194.147.115.132:443 tcp

Files

memory/1432-130-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-131-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-132-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-133-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-134-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-137-0x00007FF8A4630000-0x00007FF8A4640000-memory.dmp

memory/1432-138-0x00007FF8A4630000-0x00007FF8A4640000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.xll

MD5 e476534e17521b823794d3cc338da3e5
SHA1 f26daa812ee01d3c5b6cb3412248107ad5b8253d
SHA256 f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90
SHA512 32a37814a8110da741386b4aba804002eadbdea1390961bc291acfda709c8d0e0644b68e228d35d828f2b916fbd21b3e4bb2acde2c7ff2a66fc7292462c4d7ae

C:\Users\Admin\AppData\Local\Temp\f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90.xll

MD5 e476534e17521b823794d3cc338da3e5
SHA1 f26daa812ee01d3c5b6cb3412248107ad5b8253d
SHA256 f983a109d3d2856794352c36289e6f34f0f55420acfdc196ec9c75095eb79c90
SHA512 32a37814a8110da741386b4aba804002eadbdea1390961bc291acfda709c8d0e0644b68e228d35d828f2b916fbd21b3e4bb2acde2c7ff2a66fc7292462c4d7ae

C:\Users\Admin\JavaObjectReflectO.dll

MD5 73ea8ca7f1650fa3b3180b3017a58325
SHA1 0dc8d539937870f0d20e207effdab9cc63ef8794
SHA256 d08b611997513b0e174fee5659b7dc3570b8378bfc3d7cd61c623c6a176b816a
SHA512 cc2b3bf7e3c0993622560fc8ba3fdfd6fb3ee4fc8cc23ba0beae753b180af968457460e5e155f0488a6e5da7cc86f5f7292c07d779dcf5bb137b9f5b8a6881be

C:\Users\Admin\JavaObjectReflectO.dll

MD5 73ea8ca7f1650fa3b3180b3017a58325
SHA1 0dc8d539937870f0d20e207effdab9cc63ef8794
SHA256 d08b611997513b0e174fee5659b7dc3570b8378bfc3d7cd61c623c6a176b816a
SHA512 cc2b3bf7e3c0993622560fc8ba3fdfd6fb3ee4fc8cc23ba0beae753b180af968457460e5e155f0488a6e5da7cc86f5f7292c07d779dcf5bb137b9f5b8a6881be

memory/2932-154-0x0000000180000000-0x000000018003C000-memory.dmp

memory/1432-174-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-175-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-176-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp

memory/1432-177-0x00007FF8A6690000-0x00007FF8A66A0000-memory.dmp