Malware Analysis Report

2025-04-13 12:35

Sample ID 240803-d1sfbs1hnr
Target Polymorphic.exe
SHA256 9188647a8083afb376f0205e254e20d977c43f7adb69d148ab6197a386304fa5
Tags
asyncrat default rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

9188647a8083afb376f0205e254e20d977c43f7adb69d148ab6197a386304fa5

Threat Level: Known bad

The file Polymorphic.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Async RAT payload

Unsigned PE

Modifies registry class

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-08-03 03:28

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-03 03:28

Reported

2024-08-03 03:29

Platform

win11-20240802-en

Max time kernel

7s

Max time network

9s

Command Line

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

Signatures

AsyncRat

rat asyncrat

Async RAT payload

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

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-4272559161-3282441186-401869126-1000_Classes\Local Settings\MuiCache C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Polymorphic.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe N/A

Processes

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

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

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe

"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca

Network

Country Destination Domain Proto
N/A 127.0.0.1:8848 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

memory/1628-0-0x000001B246130000-0x000001B24614A000-memory.dmp

memory/1628-1-0x00007FF63FF5A000-0x00007FF63FF5B000-memory.dmp

memory/1628-2-0x00007FF63FF40000-0x00007FF63FF85000-memory.dmp

memory/1628-3-0x000001B247AF0000-0x000001B247B06000-memory.dmp

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

MD5 06f54da138064bcb87a50ea5796be0bc
SHA1 149614dcc0cc8a15d12e042639d53d364b692f5a
SHA256 fd00cc98658581a6d166ce94e14f68079c4a2948db69e5ac60755ac8c50c1f50
SHA512 530073a003f19a93945cc2d663cd395744c98b3d8377ed6fbc237be0b42b7ec23544fe149435e3d5d47b8d385c2a9bd1e2605222bbe2df0d3233edf10550202d