Malware Analysis Report

2024-08-06 10:24

Sample ID 240614-x42myswhmr
Target fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d
SHA256 fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d
Tags
100000 cobaltstrike
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d

Threat Level: Known bad

The file fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d was found to be: Known bad.

Malicious Activity Summary

100000 cobaltstrike

Cobalt Strike reflective loader

Cobaltstrike family

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-06-14 19:25

Signatures

Cobalt Strike reflective loader

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

Cobaltstrike family

cobaltstrike

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 19:25

Reported

2024-06-14 19:27

Platform

win10v2004-20240611-en

Max time kernel

91s

Max time network

139s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1576 wrote to memory of 376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1576 wrote to memory of 376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1576 wrote to memory of 376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 376 -ip 376

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 376 -s 632

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 203.107.17.2.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 6.160.77.104.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 19:25

Reported

2024-06-14 19:27

Platform

win7-20240508-en

Max time kernel

121s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d.dll,#1

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2036 wrote to memory of 1104 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1104 wrote to memory of 3008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1104 wrote to memory of 3008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1104 wrote to memory of 3008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1104 wrote to memory of 3008 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fa53550f758da6fd69dc21fc4ddfc5864a0246e2a79fb4144ff70bfe2e3e752d.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1104 -s 228

Network

N/A

Files

N/A