Malware Analysis Report

2024-10-23 18:56

Sample ID 241011-g2xcfsvblm
Target 6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4
SHA256 6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4
Tags
100000 cobaltstrike discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4

Threat Level: Known bad

The file 6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4 was found to be: Known bad.

Malicious Activity Summary

100000 cobaltstrike discovery

Cobalt Strike reflective loader

Cobaltstrike family

System Location Discovery: System Language Discovery

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-11 06:18

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

2024-10-11 06:18

Reported

2024-10-11 06:21

Platform

win7-20240729-en

Max time kernel

63s

Max time network

17s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4.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\6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2368 -s 228

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-11 06:18

Reported

2024-10-11 06:21

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

151s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4.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 2768 wrote to memory of 1164 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2768 wrote to memory of 1164 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2768 wrote to memory of 1164 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\6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\6c7571c64b57f407536511f99c0632bbd2f692ca53f16eeab0f15238597a4fb4.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 1164 -ip 1164

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1164 -s 632

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 98.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

N/A