Malware Analysis Report

2025-04-13 11:50

Sample ID 220119-pfkqjahfb4
Target 628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf
SHA256 628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf
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

628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf

Threat Level: Known bad

The file 628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf 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

Checks processor information in registry

Enumerates system info in registry

Suspicious use of SetWindowsHookEx

Suspicious behavior: AddClipboardFormatListener

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-01-19 12:16

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-19 12:16

Reported

2022-01-19 12:18

Platform

win10v2004-en-20220112

Max time kernel

133s

Max time network

151s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.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 416 wrote to memory of 452 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\SYSTEM32\rundll32.exe
PID 416 wrote to memory of 452 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\628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.xll"

C:\Windows\SYSTEM32\rundll32.exe

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

Network

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

Files

memory/416-130-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-131-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-132-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-133-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-134-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-137-0x00007FFB9E360000-0x00007FFB9E370000-memory.dmp

memory/416-138-0x00007FFB9E360000-0x00007FFB9E370000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.xll

MD5 b93d82f11a5e25f636292756755dcb34
SHA1 f4f73365f963e1ff660647ea5fec64183232a359
SHA256 628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf
SHA512 cb20f48d26c57cdc7a24db0fbd77ad7fd4f94ae5bbc6a7a740284efe111fae1cc719c88c874b5651c6e13a7166cc5cbd21f6bc8d4ea02b98b83cc48d523a204e

C:\Users\Admin\AppData\Local\Temp\628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf.xll

MD5 b93d82f11a5e25f636292756755dcb34
SHA1 f4f73365f963e1ff660647ea5fec64183232a359
SHA256 628430a43571477dd00085cdcdaa9a834e030cb80e39ae19b6a107c1f904e2cf
SHA512 cb20f48d26c57cdc7a24db0fbd77ad7fd4f94ae5bbc6a7a740284efe111fae1cc719c88c874b5651c6e13a7166cc5cbd21f6bc8d4ea02b98b83cc48d523a204e

C:\Users\Admin\JavaObjectReflectiveO.dll

MD5 246742458a750e8bedc48ef8e1996250
SHA1 11294a2484152213b4f3220691b61f4b6985c19d
SHA256 83c24f629cfa995a27e693010cefa67ac9b79519c46b9e57feb36d7238f9e96c
SHA512 2146f962748687b5a800c16c47b534af01dd5bb43d2694d8d07e0395b3bd2d1f644d66d5787b44204325b04af21d65d42acb7d79564d6f21e4174d648f357f41

C:\Users\Admin\JavaObjectReflectiveO.dll

MD5 246742458a750e8bedc48ef8e1996250
SHA1 11294a2484152213b4f3220691b61f4b6985c19d
SHA256 83c24f629cfa995a27e693010cefa67ac9b79519c46b9e57feb36d7238f9e96c
SHA512 2146f962748687b5a800c16c47b534af01dd5bb43d2694d8d07e0395b3bd2d1f644d66d5787b44204325b04af21d65d42acb7d79564d6f21e4174d648f357f41

memory/452-152-0x0000000180000000-0x000000018003C000-memory.dmp

memory/416-174-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-175-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-176-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp

memory/416-177-0x00007FFBA05F0000-0x00007FFBA0600000-memory.dmp