Malware Analysis Report

2024-12-07 11:42

Sample ID 241113-vj22wawbmh
Target ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe
SHA256 ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1
Tags
discovery persistence
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1

Threat Level: Shows suspicious behavior

The file ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe was found to be: Shows suspicious behavior.

Malicious Activity Summary

discovery persistence

Deletes itself

Executes dropped EXE

Adds Run key to start application

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 17:01

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 17:01

Reported

2024-11-13 17:04

Platform

win7-20240903-en

Max time kernel

119s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe"

Signatures

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe

"C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

N/A

Files

memory/2512-0-0x0000000000400000-0x0000000000403000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 161cb5bc5a91dacc71d059e0ae6923f3
SHA1 f9e43e3c66e6033ae1da3a721aa4645891aead13
SHA256 65485a7e6091d08ad36a23a44561d453e9ec425289fee32933b04cc4f8620701
SHA512 be1b7c14031905618603cf15b5da59263767035caf31989b9c1a40684c762a39b5ae3a3d136bc8b4068c4ef449140f9db1d49a63c27f1420311d0d53eb9e3a44

memory/2108-8-0x0000000000400000-0x0000000000403000-memory.dmp

memory/2512-6-0x0000000000400000-0x0000000000403000-memory.dmp

memory/2108-10-0x0000000000400000-0x0000000000403000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 17:01

Reported

2024-11-13 17:04

Platform

win10v2004-20241007-en

Max time kernel

119s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe"

Signatures

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\microsofthelp.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\microsofthelp = "C:\\Windows\\microsofthelp.exe" C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\microsofthelp.exe C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\microsofthelp.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe

"C:\Users\Admin\AppData\Local\Temp\ab520ae0a9940d5b4954977444b7185aa09e1389fa6a293e4798bd9819db6af1.exe"

C:\Windows\microsofthelp.exe

"C:\Windows\microsofthelp.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

memory/116-0-0x0000000000400000-0x0000000000403000-memory.dmp

C:\Windows\microsofthelp.exe

MD5 161cb5bc5a91dacc71d059e0ae6923f3
SHA1 f9e43e3c66e6033ae1da3a721aa4645891aead13
SHA256 65485a7e6091d08ad36a23a44561d453e9ec425289fee32933b04cc4f8620701
SHA512 be1b7c14031905618603cf15b5da59263767035caf31989b9c1a40684c762a39b5ae3a3d136bc8b4068c4ef449140f9db1d49a63c27f1420311d0d53eb9e3a44

memory/3608-6-0x0000000000400000-0x0000000000403000-memory.dmp

memory/116-5-0x0000000000400000-0x0000000000403000-memory.dmp

memory/3608-7-0x0000000000400000-0x0000000000403000-memory.dmp