Malware Analysis Report

2024-09-23 02:51

Sample ID 240707-tjnc2sxdlh
Target Builder.exe
SHA256 a2251164857af32d0a13d3d91c9cb17af07f5858ad935c666a4787f12d585622
Tags
asyncrat stormkitty default persistence privilege_escalation rat spyware stealer
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 Overview

score
10/10

SHA256

a2251164857af32d0a13d3d91c9cb17af07f5858ad935c666a4787f12d585622

Threat Level: Known bad

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

Malicious Activity Summary

asyncrat stormkitty default persistence privilege_escalation rat spyware stealer

AsyncRat

Async RAT payload

Asyncrat family

Stormkitty family

StormKitty

StormKitty payload

Reads user/profile data of web browsers

Legitimate hosting services abused for malware hosting/C2

Looks up geolocation information via web service

Looks up external IP address via web service

Drops desktop.ini file(s)

Unsigned PE

Event Triggered Execution: Netsh Helper DLL

Checks processor information in registry

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-07-07 16:05

Signatures

Async RAT payload

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

Asyncrat family

asyncrat

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

2024-07-07 16:05

Reported

2024-07-07 18:16

Platform

win10v2004-20240704-en

Max time kernel

595s

Max time network

434s

Command Line

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

Signatures

AsyncRat

rat asyncrat

StormKitty

stealer stormkitty

StormKitty payload

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

Reads user/profile data of web browsers

spyware stealer

Drops desktop.ini file(s)

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File created C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Documents\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File opened for modification C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File created C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Camera Roll\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File created C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\Saved Pictures\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File created C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Pictures\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File created C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File opened for modification C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Desktop\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
File created C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Grabber\DRIVE-C\Users\Admin\Downloads\desktop.ini C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A pastebin.com N/A N/A
N/A pastebin.com N/A N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A icanhazip.com N/A N/A

Looks up geolocation information via web service

Event Triggered Execution: Netsh Helper DLL

persistence privilege_escalation
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key opened \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key queried \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A
Key value enumerated \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh C:\Windows\SysWOW64\netsh.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\Description\System\CentralProcessor\0 C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\Identifier C:\Users\Admin\AppData\Local\Temp\Builder.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1552 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\Builder.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\Builder.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 1932 N/A C:\Users\Admin\AppData\Local\Temp\Builder.exe C:\Windows\SysWOW64\cmd.exe
PID 1932 wrote to memory of 4976 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 1932 wrote to memory of 4976 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 1932 wrote to memory of 4976 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 1932 wrote to memory of 4104 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\netsh.exe
PID 1932 wrote to memory of 4104 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\netsh.exe
PID 1932 wrote to memory of 4104 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\netsh.exe
PID 1932 wrote to memory of 1916 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\findstr.exe
PID 1932 wrote to memory of 1916 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\findstr.exe
PID 1932 wrote to memory of 1916 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\findstr.exe
PID 1552 wrote to memory of 3856 N/A C:\Users\Admin\AppData\Local\Temp\Builder.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 3856 N/A C:\Users\Admin\AppData\Local\Temp\Builder.exe C:\Windows\SysWOW64\cmd.exe
PID 1552 wrote to memory of 3856 N/A C:\Users\Admin\AppData\Local\Temp\Builder.exe C:\Windows\SysWOW64\cmd.exe
PID 3856 wrote to memory of 1084 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 3856 wrote to memory of 1084 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 3856 wrote to memory of 1084 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 3856 wrote to memory of 1732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\netsh.exe
PID 3856 wrote to memory of 1732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\netsh.exe
PID 3856 wrote to memory of 1732 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\netsh.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\netsh.exe

netsh wlan show profile

C:\Windows\SysWOW64\findstr.exe

findstr All

C:\Windows\SysWOW64\cmd.exe

"cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\netsh.exe

netsh wlan show networks mode=bssid

Network

Country Destination Domain Proto
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 44.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 icanhazip.com udp
US 104.16.185.241:80 icanhazip.com tcp
US 8.8.8.8:53 api.mylnikov.org udp
US 104.21.44.66:443 api.mylnikov.org tcp
US 8.8.8.8:53 241.185.16.104.in-addr.arpa udp
US 8.8.8.8:53 api.telegram.org udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 66.44.21.104.in-addr.arpa udp
NL 149.154.167.220:443 api.telegram.org tcp
US 8.8.8.8:53 220.167.154.149.in-addr.arpa udp
US 8.8.8.8:53 pastebin.com udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 172.67.19.24:443 pastebin.com tcp
US 8.8.8.8:53 24.19.67.172.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
US 8.8.8.8:53 35.56.20.217.in-addr.arpa udp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:8808 tcp
US 8.8.8.8:53 2.173.189.20.in-addr.arpa udp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:7707 tcp
N/A 127.0.0.1:8808 tcp
N/A 127.0.0.1:6606 tcp
N/A 127.0.0.1:6606 tcp

Files

memory/1552-0-0x0000000074E7E000-0x0000000074E7F000-memory.dmp

memory/1552-1-0x0000000000600000-0x000000000064A000-memory.dmp

memory/1552-2-0x0000000074E70000-0x0000000075620000-memory.dmp

memory/1552-3-0x0000000005020000-0x0000000005086000-memory.dmp

C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\Browsers\Firefox\Bookmarks.txt

MD5 2e9d094dda5cdc3ce6519f75943a4ff4
SHA1 5d989b4ac8b699781681fe75ed9ef98191a5096c
SHA256 c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142
SHA512 d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

C:\Users\Admin\AppData\Local\8eb819baae042bca64babe0ebc72119b\Admin@ANYSUCUO_en-US\System\Process.txt

MD5 eb53dbbf37fd80b0ab424f0af57a5544
SHA1 76e3df3dc8e849f2f951f04e85de2b7f3794c9f7
SHA256 58d404284bbffc77ac2806915f40b816a48334f07f00694c1cf9cb38b0701591
SHA512 35800bda02f51df49893ba45e9e4e2d8d554e67c8aa2d3c3ff251a634e062ec7dfc5179a937ac1290ebbd32af1ccd0d753160d463699d6c8ceec5241109eec00

memory/1552-144-0x0000000074E70000-0x0000000075620000-memory.dmp

memory/1552-146-0x0000000005870000-0x0000000005902000-memory.dmp

memory/1552-147-0x0000000005FC0000-0x0000000006564000-memory.dmp

memory/1552-151-0x0000000005A80000-0x0000000005A8A000-memory.dmp

C:\Users\Admin\AppData\Local\4525e4682b3120724e35be72cf8daeee\msgid.dat

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/1552-157-0x0000000005C70000-0x0000000005C82000-memory.dmp

memory/1552-180-0x0000000074E7E000-0x0000000074E7F000-memory.dmp

memory/1552-181-0x0000000074E70000-0x0000000075620000-memory.dmp

memory/1552-182-0x0000000074E70000-0x0000000075620000-memory.dmp