Malware Analysis Report

2025-01-03 06:32

Sample ID 230830-we15fshd95
Target google.exe
SHA256 ce9ac1c65559cdc5dce9321e5ec22fed14c08db278c75476e1a1ffac2e652728
Tags
stormkitty persistence stealer
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

ce9ac1c65559cdc5dce9321e5ec22fed14c08db278c75476e1a1ffac2e652728

Threat Level: Known bad

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

Malicious Activity Summary

stormkitty persistence stealer

Contains code to disable Windows Defender

StormKitty

StormKitty payload

Stormkitty family

Adds Run key to start application

Looks up external IP address via web service

Unsigned PE

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-30 17:50

Signatures

Contains code to disable Windows Defender

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

StormKitty payload

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

Stormkitty family

stormkitty

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-30 17:50

Reported

2023-08-30 17:52

Platform

win7-20230712-en

Max time kernel

46s

Max time network

49s

Command Line

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

Signatures

Contains code to disable Windows Defender

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

StormKitty

stealer stormkitty

StormKitty payload

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-377084978-2088738870-2818360375-1000\Software\Microsoft\Windows\CurrentVersion\Run\nvidiaDValueOn = "C:\\Users\\Admin\\AppData\\Local\\NVIDIA Local Drivers\\DriversUpdateProcess_x64.exe" C:\Users\Admin\AppData\Local\Temp\google.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\system32\WerFault.exe C:\Users\Admin\AppData\Local\Temp\google.exe

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2076 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\google.exe C:\Windows\system32\WerFault.exe
PID 2076 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\google.exe C:\Windows\system32\WerFault.exe
PID 2076 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\google.exe C:\Windows\system32\WerFault.exe

Processes

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 2076 -s 856

Network

Country Destination Domain Proto
US 8.8.8.8:53 checkip.dyndns.org udp
US 158.101.44.242:80 checkip.dyndns.org tcp

Files

memory/2076-0-0x00000000003C0000-0x00000000003DA000-memory.dmp

memory/2076-1-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

memory/2076-2-0x000000001B210000-0x000000001B290000-memory.dmp

memory/2076-3-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

memory/2076-4-0x000000001B210000-0x000000001B290000-memory.dmp

memory/2076-7-0x000007FEF5A00000-0x000007FEF63EC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-30 17:50

Reported

2023-08-30 17:52

Platform

win10v2004-20230703-en

Max time kernel

35s

Max time network

40s

Command Line

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

Signatures

Contains code to disable Windows Defender

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

StormKitty

stealer stormkitty

StormKitty payload

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-618519468-4027732583-1827558364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\nvidiaDValueOn = "C:\\Users\\Admin\\AppData\\Local\\NVIDIA Local Drivers\\DriversUpdateProcess_x64.exe" C:\Users\Admin\AppData\Local\Temp\google.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A checkip.dyndns.org N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\system32\WerFault.exe C:\Users\Admin\AppData\Local\Temp\google.exe

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Processes

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

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

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -pss -s 432 -p 1516 -ip 1516

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1516 -s 1376

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 checkip.dyndns.org udp
BR 132.226.247.73:80 checkip.dyndns.org tcp
US 8.8.8.8:53 73.247.226.132.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp

Files

memory/1516-0-0x0000000000A70000-0x0000000000A8A000-memory.dmp

memory/1516-1-0x00007FFB542E0000-0x00007FFB54DA1000-memory.dmp

memory/1516-2-0x000000001B780000-0x000000001B790000-memory.dmp

memory/1516-5-0x00007FFB542E0000-0x00007FFB54DA1000-memory.dmp