Malware Analysis Report

2024-10-16 05:09

Sample ID 240805-2j646a1bkj
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

2024-08-05 22:37

Signatures

AmmyyAdmin payload

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

Ammyyadmin family

ammyyadmin

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-05 22:37

Reported

2024-08-05 22:40

Platform

win7-20240705-en

Max time kernel

120s

Max time network

121s

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 006d1c6da8e538cc9ffe408d951a6584
SHA1 40968b80fe53fa2909bf290e846efdebdb3fa04a
SHA256 9944f7617e1d4dedaddd29b0a4aeb024752c4db24ca0f6ac34d405a5c01fea85
SHA512 ee994df50cc57840a3b27ad8c4bd2d8311a3274b87733b14f2390e8af93be61496f14e601331e6d14020f2cdb8195935d2629add2320cda833c725407cbdaae0

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-05 22:37

Reported

2024-08-05 22:40

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

150s

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 4820 wrote to memory of 1644 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe
PID 4820 wrote to memory of 1644 N/A C:\Users\Admin\AppData\Local\Temp\rh111.exe C:\Users\Admin\AppData\Local\Temp\rh111.exe
PID 4820 wrote to memory of 1644 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 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 34f6e3e979569abbe83f37d16960e571
SHA1 679e3acfb6562ce40907c413f6a388eb170c163a
SHA256 9d941d84d5992f77edd76f4b75c413806bce5bf17262c9b5dcd80dc919cca22f
SHA512 d04fd4814fd5186dfb1c34962b6248f2748532370dc3538cef0504da1d5b7b2e53c6c896e5d7401ce25fd0e844e44c778201182c62df87a33aac977390239256