Malware Analysis Report

2024-11-13 15:23

Sample ID 240619-k2rczssbpk
Target cch_blum_re.exe
SHA256 d466abf2244e8cf870d50908ef0856caef36127f813fa3e1485eceac81ddd611
Tags
pyinstaller
score
3/10

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 Overview

score
3/10

SHA256

d466abf2244e8cf870d50908ef0856caef36127f813fa3e1485eceac81ddd611

Threat Level: Likely benign

The file cch_blum_re.exe was found to be: Likely benign.

Malicious Activity Summary

pyinstaller

Detects Pyinstaller

Unsigned PE

Enumerates physical storage devices

Modifies registry class

Opens file in notepad (likely ransom note)

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-06-19 09:06

Signatures

Detects Pyinstaller

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-19 09:06

Reported

2024-06-19 09:08

Platform

win10-20240404-en

Max time kernel

79s

Max time network

80s

Command Line

cmd /c C:\Users\Admin\AppData\Local\Temp\cch_blum_re.pyc

Signatures

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3968772205-1713802336-1776639840-1000_Classes\Local Settings C:\Windows\system32\cmd.exe N/A
Key created \REGISTRY\USER\S-1-5-21-3968772205-1713802336-1776639840-1000_Classes\Local Settings C:\Windows\system32\OpenWith.exe N/A

Opens file in notepad (likely ransom note)

ransomware
Description Indicator Process Target
N/A N/A C:\Windows\system32\NOTEPAD.EXE N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\OpenWith.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 992 wrote to memory of 396 N/A C:\Windows\system32\OpenWith.exe C:\Windows\system32\NOTEPAD.EXE
PID 992 wrote to memory of 396 N/A C:\Windows\system32\OpenWith.exe C:\Windows\system32\NOTEPAD.EXE

Processes

C:\Windows\system32\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\cch_blum_re.pyc

C:\Windows\system32\OpenWith.exe

C:\Windows\system32\OpenWith.exe -Embedding

C:\Windows\system32\NOTEPAD.EXE

"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\cch_blum_re.pyc

Network

Files

N/A