Malware Analysis Report

2024-09-11 01:53

Sample ID 231011-qrdxssbh92
Target 2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe
SHA256 704381fe2d234c45355135639671982d9c592662ef1e6263db78d2aadd7e8eb8
Tags
medusalocker
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

704381fe2d234c45355135639671982d9c592662ef1e6263db78d2aadd7e8eb8

Threat Level: Known bad

The file 2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe was found to be: Known bad.

Malicious Activity Summary

medusalocker

MedusaLocker payload

Medusalocker family

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix

N/A

Analysis: static1

Detonation Overview

Reported

2023-10-11 13:29

Signatures

MedusaLocker payload

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

Medusalocker family

medusalocker

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-11 13:29

Reported

2023-10-12 01:24

Platform

win7-20230831-en

Max time kernel

120s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe"

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2440 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe
PID 2440 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe
PID 2440 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe
PID 2440 wrote to memory of 2168 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe

"C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2440 -s 216

Network

N/A

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-11 13:29

Reported

2023-10-12 01:26

Platform

win10v2004-20230915-en

Max time kernel

153s

Max time network

164s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe"

Signatures

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2380 wrote to memory of 4764 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe
PID 2380 wrote to memory of 4764 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe
PID 2380 wrote to memory of 4764 N/A C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe

"C:\Users\Admin\AppData\Local\Temp\2023-08-26_821d0098dfec5bdf9df9fc1a41f36288_cobalt-strike_medusa-locker_JC.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2380 -ip 2380

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 584

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 584

Network

Country Destination Domain Proto
US 209.197.3.8:80 tcp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 54.120.234.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 9.57.101.20.in-addr.arpa udp
US 8.8.8.8:53 252.15.104.51.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp

Files

N/A