Malware Analysis Report

2025-04-13 11:50

Sample ID 220119-nefjrahchk
Target 465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d
SHA256 465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d
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

465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d

Threat Level: Known bad

The file 465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d was found to be: Known bad.

Malicious Activity Summary

bazarloader dropper loader

Bazar Loader

Process spawned unexpected child process

Bazar/Team9 Loader payload

Loads dropped DLL

Suspicious behavior: AddClipboardFormatListener

Checks processor information in registry

Enumerates system info in registry

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-01-19 11:18

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-19 11:18

Reported

2022-01-19 11:20

Platform

win10-en-20211208

Max time kernel

121s

Max time network

133s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d.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\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
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily 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 2352 wrote to memory of 3064 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\SYSTEM32\rundll32.exe
PID 2352 wrote to memory of 3064 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\465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d.xll"

C:\Windows\SYSTEM32\rundll32.exe

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

Network

Files

memory/2352-116-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-117-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-118-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-119-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-122-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-129-0x00007FFDC85C0000-0x00007FFDC85D0000-memory.dmp

memory/2352-130-0x00007FFDC85C0000-0x00007FFDC85D0000-memory.dmp

\Users\Admin\AppData\Local\Temp\465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d.xll

MD5 f113fd9a32bdff6c4a90a0ccd905fd97
SHA1 c3edf7f63f3e65fef0ddf17e47d6d048ba3ee4d7
SHA256 465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d
SHA512 84f4355a0ee609df9b84f37d4a6ffff1d8dfd0637823c41e7d3a5d8991efd2d55a04d92a1455ceacb0e04b8283f2ba8504b9ad8eb9bf75f2430bf0e228f1a560

\Users\Admin\AppData\Local\Temp\465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d.xll

MD5 f113fd9a32bdff6c4a90a0ccd905fd97
SHA1 c3edf7f63f3e65fef0ddf17e47d6d048ba3ee4d7
SHA256 465f6c30e884e9422573f39388e9aff5709c40301baf83369bffac32a797bb4d
SHA512 84f4355a0ee609df9b84f37d4a6ffff1d8dfd0637823c41e7d3a5d8991efd2d55a04d92a1455ceacb0e04b8283f2ba8504b9ad8eb9bf75f2430bf0e228f1a560

C:\Users\Admin\JavaObjectReflectH.dll

MD5 bfa435c5244ff6fca69003ef2c14a52c
SHA1 556148d85d188933bbc5a4bfe69f09c9aa220f66
SHA256 8481b095db39475834e6c9de006d5eab2f9bbf22569984314d4d4257355b04ba
SHA512 a6f058bdd60367fcaf3ecfcfb41854440a0554d9a592b97a2eeb0a28424a5117b0619a87738d51e08418356ed70ecf3e67333fd7837cbcc676900b2c34d06a2d

\Users\Admin\JavaObjectReflectH.dll

MD5 bfa435c5244ff6fca69003ef2c14a52c
SHA1 556148d85d188933bbc5a4bfe69f09c9aa220f66
SHA256 8481b095db39475834e6c9de006d5eab2f9bbf22569984314d4d4257355b04ba
SHA512 a6f058bdd60367fcaf3ecfcfb41854440a0554d9a592b97a2eeb0a28424a5117b0619a87738d51e08418356ed70ecf3e67333fd7837cbcc676900b2c34d06a2d

memory/3064-276-0x0000000180000000-0x000000018003C000-memory.dmp

memory/2352-294-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-295-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-296-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp

memory/2352-297-0x00007FFDCB810000-0x00007FFDCB820000-memory.dmp