Malware Analysis Report

2024-09-22 07:09

Sample ID 240601-e8s79sab4x
Target a13c1ec24d6b087a6ac188b0fd254178.exe
SHA256 7b7f9647dbc512c0f9857332b181991b1e8f6b1ab0634f31d8612ee483d2933f
Tags
asyncrat default rat
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

7b7f9647dbc512c0f9857332b181991b1e8f6b1ab0634f31d8612ee483d2933f

Threat Level: Known bad

The file a13c1ec24d6b087a6ac188b0fd254178.exe was found to be: Known bad.

Malicious Activity Summary

asyncrat default rat

AsyncRat

Suspicious use of SetThreadContext

Unsigned PE

Program crash

Script User-Agent

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-06-01 04:37

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-01 04:37

Reported

2024-06-01 04:39

Platform

win7-20240215-en

Max time kernel

132s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe"

Signatures

AsyncRat

rat asyncrat

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1512 set thread context of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

Script User-Agent

Description Indicator Process Target
HTTP User-Agent header Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) N/A N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 1928 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
PID 1512 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\SysWOW64\WerFault.exe
PID 1512 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\SysWOW64\WerFault.exe
PID 1512 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\SysWOW64\WerFault.exe
PID 1512 wrote to memory of 2904 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe

"C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

-arguments

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1512 -s 348

Network

Country Destination Domain Proto
LT 176.223.130.167:80 176.223.130.167 tcp
N/A 192.168.1.2:1800 tcp
N/A 192.168.1.2:1800 tcp
N/A 192.168.1.2:1800 tcp
N/A 192.168.1.2:1800 tcp
N/A 192.168.1.2:1800 tcp
N/A 192.168.1.2:1800 tcp

Files

memory/1928-2-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1928-8-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

memory/1928-10-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1928-11-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1928-4-0x0000000000400000-0x0000000000412000-memory.dmp

memory/1928-12-0x000000007460E000-0x000000007460F000-memory.dmp

memory/1928-13-0x0000000074600000-0x0000000074CEE000-memory.dmp

memory/1928-14-0x0000000074600000-0x0000000074CEE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-01 04:37

Reported

2024-06-01 04:39

Platform

win10v2004-20240508-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe"

Signatures

AsyncRat

rat asyncrat

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4632 set thread context of 2136 N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

Script User-Agent

Description Indicator Process Target
HTTP User-Agent header Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) N/A N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe

"C:\Users\Admin\AppData\Local\Temp\a13c1ec24d6b087a6ac188b0fd254178.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe

-arguments

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 4632 -ip 4632

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4632 -s 876

Network

Country Destination Domain Proto
LT 176.223.130.167:80 176.223.130.167 tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 167.130.223.176.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
N/A 192.168.1.2:1800 tcp
NL 23.62.61.194:443 www.bing.com tcp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
N/A 192.168.1.2:1800 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
N/A 192.168.1.2:1800 tcp
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
N/A 192.168.1.2:1800 tcp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
N/A 192.168.1.2:1800 tcp
N/A 192.168.1.2:1800 tcp
US 8.8.8.8:53 88.16.208.104.in-addr.arpa udp

Files

memory/2136-2-0x0000000000400000-0x0000000000412000-memory.dmp

memory/2136-7-0x000000007447E000-0x000000007447F000-memory.dmp

memory/2136-8-0x0000000074470000-0x0000000074C20000-memory.dmp

memory/2136-9-0x000000007447E000-0x000000007447F000-memory.dmp

memory/2136-10-0x0000000074470000-0x0000000074C20000-memory.dmp