Malware Analysis Report

2024-10-16 05:09

Sample ID 240806-j79abathnr
Target rh111.exe
SHA256 ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a
Tags
flawedammyy bootkit discovery persistence trojan ammyyadmin
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

ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a

Threat Level: Known bad

The file rh111.exe was found to be: Known bad.

Malicious Activity Summary

flawedammyy bootkit discovery persistence trojan ammyyadmin

Ammyyadmin family

FlawedAmmyy RAT

AmmyyAdmin payload

Writes to the Master Boot Record (MBR)

System Location Discovery: System Language Discovery

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-06 08:19

Signatures

AmmyyAdmin payload

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

Ammyyadmin family

ammyyadmin

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-06 08:19

Reported

2024-08-06 08:22

Platform

win7-20240729-en

Max time kernel

100s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rh111.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\rh111.exe

"C:\Users\Admin\AppData\Local\Temp\rh111.exe"

C:\Users\Admin\AppData\Local\Temp\rh111.exe

"C:\Users\Admin\AppData\Local\Temp\rh111.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\rh111.exe

"C:\Users\Admin\AppData\Local\Temp\rh111.exe"

Network

N/A

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 7e8cc2f847e1678184e4964053f4aae6
SHA1 8f69235efee35098fc6a3f79c2e9a6b643969bcd
SHA256 5f0273a768c00ede085870791e3f8a5d9167842a214a2995e01aa2b03501e98c
SHA512 1aba181d0361d67155fec7bacda1322d9c57be393e92edf9987476e800611ad6f9f2076839caf218f400eb1690efe3bfdbf781536821affb6ffba78568b3f930

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-06 08:19

Reported

2024-08-06 08:22

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

99s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rh111.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\rh111.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3296 wrote to memory of 3452 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe
PID 3296 wrote to memory of 3452 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe
PID 3296 wrote to memory of 3452 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe

Processes

C:\Users\Admin\AppData\Local\Temp\rh111.exe

"C:\Users\Admin\AppData\Local\Temp\rh111.exe"

C:\Users\Admin\AppData\Local\Temp\rh111.exe

"C:\Users\Admin\AppData\Local\Temp\rh111.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\rh111.exe

"C:\Users\Admin\AppData\Local\Temp\rh111.exe"

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 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 22.58.20.217.in-addr.arpa udp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 39a17a6add7450d267d0c7feac9c0292
SHA1 ad21a5fdc16b337e6a05233b279f18763bfaf55d
SHA256 a383aba2971feef661f5c48f532661b8af4de4ed01a9c9d56ad33665894fec03
SHA512 0283d70d28cf24bef961b18d848da59658359e19ced2d50dd482a2bdca28e72cfa7cb559535f00d5b4a4f31ae33bc9eca34b3df98979d34a812455c3e79ff368