Malware Analysis Report

2025-01-22 19:26

Sample ID 240807-bmkgfszeqe
Target bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.zip
SHA256 c4331ed28ba40390688140fbff8b8dfdd81a79fbcac254251c58489d41d6f851
Tags
0 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

c4331ed28ba40390688140fbff8b8dfdd81a79fbcac254251c58489d41d6f851

Threat Level: Known bad

The file bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.zip was found to be: Known bad.

Malicious Activity Summary

0 cobaltstrike discovery

Cobalt Strike reflective loader

Cobaltstrike family

System Location Discovery: System Language Discovery

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-07 01:15

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

2024-08-07 01:15

Reported

2024-08-07 01:18

Platform

win7-20240729-en

Max time kernel

122s

Max time network

128s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.dll,#1

Signatures

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\bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.dll,#1

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-07 01:15

Reported

2024-08-07 01:18

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

137s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.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 2852 wrote to memory of 4272 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2852 wrote to memory of 4272 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2852 wrote to memory of 4272 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\bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\bdada34f4afa0186470ec4b1528ee7e1d94ef541a8e5ea4d25d5865326a60523.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4272 -ip 4272

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4272 -s 544

Network

Country Destination Domain Proto
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 71.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

N/A