Malware Analysis Report

2025-04-13 21:19

Sample ID 250323-fhlaeatnz6
Target Yashma ransomware builder v1.2.exe
SHA256 b24d58cd8d600431702b67fb815a92f465147553303c0f8a1867af77214dba75
Tags
chaos ransomware
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

b24d58cd8d600431702b67fb815a92f465147553303c0f8a1867af77214dba75

Threat Level: Known bad

The file Yashma ransomware builder v1.2.exe was found to be: Known bad.

Malicious Activity Summary

chaos ransomware

Chaos

Chaos Ransomware

Chaos family

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2025-03-23 04:52

Signatures

Chaos Ransomware

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

Chaos family

chaos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-03-23 04:52

Reported

2025-03-23 04:55

Platform

win10v2004-20250314-en

Max time kernel

104s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe"

Signatures

Chaos

ransomware chaos

Chaos Ransomware

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

Chaos family

chaos

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe

"C:\Users\Admin\AppData\Local\Temp\Yashma ransomware builder v1.2.exe"

Network

Country Destination Domain Proto
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 c.pki.goog udp
GB 142.250.180.3:80 c.pki.goog tcp

Files

memory/5740-0-0x00007FFC357D3000-0x00007FFC357D5000-memory.dmp

memory/5740-1-0x0000019726CE0000-0x0000019726DB4000-memory.dmp

memory/5740-2-0x00007FFC357D0000-0x00007FFC36291000-memory.dmp

memory/5740-3-0x00007FFC357D0000-0x00007FFC36291000-memory.dmp

memory/5740-4-0x00007FFC357D3000-0x00007FFC357D5000-memory.dmp

memory/5740-5-0x00007FFC357D0000-0x00007FFC36291000-memory.dmp