Malware Analysis Report

2024-08-06 16:16

Sample ID 240624-mz2r2sycke
Target Yashma ransomware builder v1.2.exe
SHA256 f9a5a72ead096594c5d59abe706e3716f6000c3b4ebd7690f2eb114a37d1a7db
Tags
chaos ransomware
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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
10/10

SHA256

f9a5a72ead096594c5d59abe706e3716f6000c3b4ebd7690f2eb114a37d1a7db

Threat Level: Known bad

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

Malicious Activity Summary

chaos ransomware

Chaos family

Chaos

Chaos Ransomware

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-06-24 10:54

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

2024-06-24 10:54

Reported

2024-06-24 10:57

Platform

win10-20240404-en

Max time kernel

134s

Max time network

136s

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

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

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 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 31.73.42.20.in-addr.arpa udp

Files

memory/4584-0-0x0000000000D30000-0x0000000000DBC000-memory.dmp

memory/4584-1-0x00007FFB5D423000-0x00007FFB5D424000-memory.dmp

memory/4584-2-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

memory/4584-3-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

memory/4584-4-0x00007FFB5D420000-0x00007FFB5DE0C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-24 10:54

Reported

2024-06-24 10:57

Platform

win11-20240611-en

Max time kernel

90s

Max time network

93s

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

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

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

Files

memory/1484-0-0x00007FFB5D213000-0x00007FFB5D215000-memory.dmp

memory/1484-1-0x0000000000900000-0x000000000098C000-memory.dmp

memory/1484-2-0x00007FFB5D210000-0x00007FFB5DCD2000-memory.dmp

memory/1484-3-0x00007FFB5D210000-0x00007FFB5DCD2000-memory.dmp

memory/1484-4-0x00007FFB5D210000-0x00007FFB5DCD2000-memory.dmp

memory/1484-5-0x00007FFB5D210000-0x00007FFB5DCD2000-memory.dmp