Malware Analysis Report

2024-08-06 10:27

Sample ID 240614-rl2x4sxgnj
Target 321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87
SHA256 321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87
Tags
cobaltstrike
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

321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87

Threat Level: Known bad

The file 321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87 was found to be: Known bad.

Malicious Activity Summary

cobaltstrike

Cobaltstrike family

Cobalt Strike reflective loader

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2024-06-14 14:17

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: behavioral1

Detonation Overview

Submitted

2024-06-14 14:17

Reported

2024-06-14 14:20

Platform

win7-20240611-en

Max time kernel

117s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87.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 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1968 wrote to memory of 1412 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1412 wrote to memory of 2940 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1412 wrote to memory of 2940 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1412 wrote to memory of 2940 N/A C:\Windows\SysWOW64\rundll32.exe C:\Windows\SysWOW64\WerFault.exe
PID 1412 wrote to memory of 2940 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\321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1412 -s 232

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 14:17

Reported

2024-06-14 14:20

Platform

win10v2004-20240611-en

Max time kernel

93s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87.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 4532 wrote to memory of 756 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4532 wrote to memory of 756 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4532 wrote to memory of 756 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\321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\321596bef222d05d5ae4b4604a04371fdff2b50bc636a2b605bedee252858e87.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 756 -ip 756

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 756 -s 632

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.22.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
BE 23.41.178.115:443 www.bing.com tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 237.22.107.13.in-addr.arpa udp
US 8.8.8.8:53 115.178.41.23.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 32.251.17.2.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 131.83.221.88.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A