Malware Analysis Report

2025-04-13 11:50

Sample ID 220119-k7h9kagfcr
Target 75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0
SHA256 75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0
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

75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0

Threat Level: Known bad

The file 75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0 was found to be: Known bad.

Malicious Activity Summary

bazarloader dropper loader

Process spawned unexpected child process

Bazar Loader

Bazar/Team9 Loader payload

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 09:14

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-19 09:14

Reported

2022-01-19 09:17

Platform

win10-en-20211208

Max time kernel

121s

Max time network

132s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.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

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 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
Key opened \REGISTRY\MACHINE\Hardware\Description\System\BIOS 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 2796 wrote to memory of 1944 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\SYSTEM32\rundll32.exe
PID 2796 wrote to memory of 1944 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\75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.xll"

C:\Windows\SYSTEM32\rundll32.exe

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

Network

Country Destination Domain Proto
US 52.109.8.19:443 tcp
US 52.109.8.19:443 tcp

Files

memory/2796-115-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-116-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-117-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-118-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-121-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-128-0x00007FFF786A0000-0x00007FFF786B0000-memory.dmp

memory/2796-129-0x00007FFF786A0000-0x00007FFF786B0000-memory.dmp

\Users\Admin\AppData\Local\Temp\75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.xll

MD5 ae5c387389575adab73f177a746b1f7e
SHA1 b3e56b3dabed8f748d6e94c91c9c2f43fb0ad784
SHA256 75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0
SHA512 2a45a1094746463274e86bd48bcf40e820a0d4d56fae35d74e493978b9835e7877c42ddde0da5b3bce7df42e49edd64dcd5b243459480c84f4e1149972a950d4

\Users\Admin\AppData\Local\Temp\75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0.xll

MD5 ae5c387389575adab73f177a746b1f7e
SHA1 b3e56b3dabed8f748d6e94c91c9c2f43fb0ad784
SHA256 75cdb51337ba20c2f53bc8dac34e55678cc01b7698550ba91aaa3ce667af32c0
SHA512 2a45a1094746463274e86bd48bcf40e820a0d4d56fae35d74e493978b9835e7877c42ddde0da5b3bce7df42e49edd64dcd5b243459480c84f4e1149972a950d4

C:\Users\Admin\JavaObjectReflectB.dll

MD5 b94afa319617d27b15790ed5f93c20c1
SHA1 6e7544592cd4813f86235ce03a9cbfaae2f56454
SHA256 e79c56fe452f2abeef0a446f20b4bd771b2c68d45e01f540a2162b700a78c6ed
SHA512 18d728a1cbb4c267e9881645c956d3248f054b731444d38a59de22fb62f2068898d319c0a638e201004fdfbbcbe7396faaa3ea8adde03d393f7bae5e7e6832ec

\Users\Admin\JavaObjectReflectB.dll

MD5 b94afa319617d27b15790ed5f93c20c1
SHA1 6e7544592cd4813f86235ce03a9cbfaae2f56454
SHA256 e79c56fe452f2abeef0a446f20b4bd771b2c68d45e01f540a2162b700a78c6ed
SHA512 18d728a1cbb4c267e9881645c956d3248f054b731444d38a59de22fb62f2068898d319c0a638e201004fdfbbcbe7396faaa3ea8adde03d393f7bae5e7e6832ec

memory/1944-259-0x0000000180000000-0x000000018003C000-memory.dmp

memory/2796-281-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-282-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-283-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp

memory/2796-284-0x00007FFF7B1F0000-0x00007FFF7B200000-memory.dmp