Malware Analysis Report

2025-01-22 19:28

Sample ID 240806-kkpg3avcrl
Target a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3
SHA256 a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3
Tags
0 cobaltstrike
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3

Threat Level: Known bad

The file a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3 was found to be: Known bad.

Malicious Activity Summary

0 cobaltstrike

Cobaltstrike family

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-08-06 08:39

Signatures

Cobaltstrike family

cobaltstrike

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-06 08:39

Reported

2024-08-06 08:42

Platform

win7-20240705-en

Max time kernel

120s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3.dll,#1

Signatures

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1420 wrote to memory of 2124 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1420 wrote to memory of 2124 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\WerFault.exe
PID 1420 wrote to memory of 2124 N/A C:\Windows\system32\rundll32.exe C:\Windows\system32\WerFault.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3.dll,#1

C:\Windows\system32\WerFault.exe

C:\Windows\system32\WerFault.exe -u -p 1420 -s 52

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-06 08:39

Reported

2024-08-06 08:42

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

94s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\a790b850ad8a01a4ad924fa34577590163e9471cfcaaae3ff729424ad7a5b8c3.dll,#1

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 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

N/A