Malware Analysis Report

2024-10-16 05:09

Sample ID 240806-j3xeystgpr
Target rh111.exe
SHA256 ee573647477339784dcef81024de1be1762833a20e5cc2b89a93e47d05b86b6a
Tags
ammyyadmin flawedammyy bootkit discovery persistence trojan
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

ammyyadmin flawedammyy bootkit discovery persistence trojan

AmmyyAdmin payload

Ammyyadmin family

FlawedAmmyy RAT

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 08:12

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 08:12

Reported

2024-08-06 08:14

Platform

win7-20240705-en

Max time kernel

117s

Max time network

119s

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 6f2ce133a9e78c4e0a5c29b363eb4d3b
SHA1 0443fb7e247ffe9319a51c7240ff610d8b7073cd
SHA256 19a0d54f5542b7cca6e4f644d8d5a9fe999d6cec3dc6874841d736eca9dbea3d
SHA512 400103badae05f297596ff235b852e2ea24bf3b71f3bb316dcd4e1cd4a5e613e605e550b86fa4374d589184a914f0a7dbcbcb8ac189154df3038251538a387b0

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-06 08:12

Reported

2024-08-06 08:14

Platform

win10v2004-20240802-en

Max time kernel

92s

Max time network

154s

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 1504 wrote to memory of 2936 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe
PID 1504 wrote to memory of 2936 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe
PID 1504 wrote to memory of 2936 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 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 92.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 cd729f2fe267badbc9b8ed79b03da8be
SHA1 9ddc27d2660535d1f801c8281542d5ac398b2f6b
SHA256 f123881e6f80c32a0742ec4aca63a3cfcf2e22e30bf59ef24bf0b0315b3ccec4
SHA512 9d50b5713aa3ea852926891576b624a74535b18af5d90f1aad627916b14e72d7c798db7bea13b72a6cd1babca56a5220d9f7b27aa116994602d3c25a579ded90