Malware Analysis Report

2025-04-13 11:50

Sample ID 220119-ea4aksfac3
Target a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f
SHA256 a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f
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

a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f

Threat Level: Known bad

The file a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f 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

Enumerates system info in registry

Suspicious use of SetWindowsHookEx

Checks processor information in registry

Suspicious behavior: AddClipboardFormatListener

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2022-01-19 03:45

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2022-01-19 03:45

Reported

2022-01-19 03:47

Platform

win10-en-20211208

Max time kernel

118s

Max time network

136s

Command Line

"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\AppData\Local\Temp\a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f.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 value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE N/A
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

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 1052 wrote to memory of 2452 N/A C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE C:\Windows\SYSTEM32\rundll32.exe
PID 1052 wrote to memory of 2452 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\a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f.xll"

C:\Windows\SYSTEM32\rundll32.exe

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

Network

Country Destination Domain Proto
US 52.109.12.18:443 tcp

Files

memory/1052-115-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

memory/1052-116-0x00007FF89DB10000-0x00007FF89DB20000-memory.dmp

\Users\Admin\AppData\Local\Temp\a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f.xll

MD5 3ac316aac73c0740b4991a78b88832bf
SHA1 5b9890709fb8c6a3f22868992fed7dbc2dfcc003
SHA256 a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f
SHA512 fba4392e148a1dc6c4214217cddea51f104b1b193a4dd4eca5b904fd5a96bc68bc4988ab02a22ea0d576f081b4154931813c2a957697ed9613bde0afd8690c0a

\Users\Admin\AppData\Local\Temp\a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f.xll

MD5 3ac316aac73c0740b4991a78b88832bf
SHA1 5b9890709fb8c6a3f22868992fed7dbc2dfcc003
SHA256 a2e85069fc46ebd9d42f5032342656337b40583c3f94f82f653e17dd5bae7f5f
SHA512 fba4392e148a1dc6c4214217cddea51f104b1b193a4dd4eca5b904fd5a96bc68bc4988ab02a22ea0d576f081b4154931813c2a957697ed9613bde0afd8690c0a

C:\Users\Admin\JavaObjectReflectJ.dll

MD5 cb308f7f9e61f9ec5b41cfabf4e1b62c
SHA1 2a9d6252a71291dbf41b3983dd566c14f96c401c
SHA256 139d41298c43094178abdb9f1184633cfe176244bdfbb40c78c112033c2a666d
SHA512 9a084e535f41e232a9d80f8c175f5efc7f65faddc8e632e75eeeb0a2330146c43444dc8f7ffc31049317b0343a561209548edafb4d930e55f8221ab0cbc83c02

\Users\Admin\JavaObjectReflectJ.dll

MD5 cb308f7f9e61f9ec5b41cfabf4e1b62c
SHA1 2a9d6252a71291dbf41b3983dd566c14f96c401c
SHA256 139d41298c43094178abdb9f1184633cfe176244bdfbb40c78c112033c2a666d
SHA512 9a084e535f41e232a9d80f8c175f5efc7f65faddc8e632e75eeeb0a2330146c43444dc8f7ffc31049317b0343a561209548edafb4d930e55f8221ab0cbc83c02

memory/2452-901-0x0000000180000000-0x000000018003C000-memory.dmp