Malware Analysis Report

2025-01-03 08:38

Sample ID 241202-mg4hxswqbl
Target bad_rhy_mayb.exe
SHA256 250e81eeb4df4649ccb13e271ae3f80d44995b2f8ffca7a2c5e1c738546c2ab1
Tags
rhysida ransomware execution
score
10/10

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
10/10

SHA256

250e81eeb4df4649ccb13e271ae3f80d44995b2f8ffca7a2c5e1c738546c2ab1

Threat Level: Known bad

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

Malicious Activity Summary

rhysida ransomware execution

Detect Rhysida ransomware

Rhysida family

Rhysida

Command and Scripting Interpreter: PowerShell

Drops file in System32 directory

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-12-02 10:27

Signatures

Detect Rhysida ransomware

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

Rhysida family

rhysida

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-12-02 10:27

Reported

2024-12-02 10:28

Platform

win7-20240903-en

Max time kernel

50s

Max time network

16s

Command Line

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

Signatures

Detect Rhysida ransomware

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

Rhysida

ransomware rhysida

Rhysida family

rhysida

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2556 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\bad_rhy_mayb.exe C:\Windows\system32\WerFault.exe
PID 2556 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\bad_rhy_mayb.exe C:\Windows\system32\WerFault.exe
PID 2556 wrote to memory of 2356 N/A C:\Users\Admin\AppData\Local\Temp\bad_rhy_mayb.exe C:\Windows\system32\WerFault.exe

Processes

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2556 -s 72

Network

N/A

Files

memory/2556-0-0x0000000000400000-0x0000000000523000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-12-02 10:27

Reported

2024-12-02 10:28

Platform

win10v2004-20241007-en

Max time kernel

46s

Max time network

38s

Command Line

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

Signatures

Detect Rhysida ransomware

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

Rhysida

ransomware rhysida

Rhysida family

rhysida

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\System32\%AppData%\Microsoft\Windows\Start Menu\Programs\Windows PowerShell\Windows PowerShell.lnk C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe N/A
N/A N/A C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe N/A

Processes

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

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

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

C:\Windows\system32\WindowsPowerShell\v1.0\PowerShell.exe

"PowerShell.exe" -noexit -command Set-Location -literalPath 'C:\Users\Admin\AppData\Local\Temp'

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp

Files

memory/4744-0-0x0000000000400000-0x0000000000523000-memory.dmp

memory/3532-3-0x00007FF818053000-0x00007FF818055000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yapalzka.tyt.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3532-13-0x00000210201E0000-0x0000021020202000-memory.dmp

memory/3532-14-0x00007FF818050000-0x00007FF818B11000-memory.dmp

memory/3532-15-0x00007FF818050000-0x00007FF818B11000-memory.dmp

memory/3532-16-0x00000210205A0000-0x00000210205E4000-memory.dmp

memory/3532-17-0x0000021020670000-0x00000210206E6000-memory.dmp

memory/3532-18-0x0000021020630000-0x000002102064E000-memory.dmp

memory/3936-20-0x0000000000400000-0x0000000000523000-memory.dmp

memory/3532-21-0x00007FF818053000-0x00007FF818055000-memory.dmp

memory/3532-22-0x00007FF818050000-0x00007FF818B11000-memory.dmp

memory/3532-25-0x00007FF818050000-0x00007FF818B11000-memory.dmp