Malware Analysis Report

2025-01-22 19:29

Sample ID 240807-ds8scazbrq
Target e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.zip
SHA256 bd28ccc12ddb8b91e1eb47293303ee7dc13239d7ec0fcad92ef82996f585611f
Tags
discovery 0 cobaltstrike
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

bd28ccc12ddb8b91e1eb47293303ee7dc13239d7ec0fcad92ef82996f585611f

Threat Level: Known bad

The file e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.zip was found to be: Known bad.

Malicious Activity Summary

discovery 0 cobaltstrike

Cobalt Strike reflective loader

Cobaltstrike family

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-07 03:17

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: behavioral2

Detonation Overview

Submitted

2024-08-07 03:17

Reported

2024-08-07 03:20

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

153s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.dll,#1

Signatures

Program crash

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3952 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3952 wrote to memory of 3012 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3952 wrote to memory of 3012 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\e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3012 -ip 3012

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3012 -s 680

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
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 71.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-07 03:17

Reported

2024-08-07 03:20

Platform

win7-20240704-en

Max time kernel

12s

Max time network

19s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.dll,#1

Signatures

Program crash

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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\e931e57ae0b819fd2caf2680937cc03c3019379dda70dd7f7cd56b86e580925e.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 244

Network

N/A

Files

N/A