Malware Analysis Report

2024-10-24 20:53

Sample ID 241018-bt375s1dmk
Target 69a8ed0b8edc940968f8535c20b4bbe4.bin
SHA256 cbfa0f481fd6ba911deb771cc7b9d4ac3596bfc28675061dda70a9239b10d442
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

cbfa0f481fd6ba911deb771cc7b9d4ac3596bfc28675061dda70a9239b10d442

Threat Level: Known bad

The file 69a8ed0b8edc940968f8535c20b4bbe4.bin was found to be: Known bad.

Malicious Activity Summary

ammyyadmin flawedammyy bootkit discovery persistence trojan

AmmyyAdmin payload

FlawedAmmyy RAT

Ammyyadmin family

Checks computer location settings

Writes to the Master Boot Record (MBR)

System Location Discovery: System Language Discovery

Unsigned PE

Modifies data under HKEY_USERS

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-18 01:27

Signatures

AmmyyAdmin payload

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

Ammyyadmin family

ammyyadmin

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-18 01:27

Reported

2024-10-18 01:29

Platform

win7-20240729-en

Max time kernel

150s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.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\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 901cc6743f1e2d361bc9418c40e98bda247db0a2a75d5e385e80331d92d7311927bf2cec4e01ab45d01375a590986c20f1a5436acbcb58c18e2dd26d248c6e7a9eb5d0bb5e245c83b4506d1f C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 rl.a4on.tv udp
RU 95.213.191.237:80 rl.a4on.tv tcp
RU 95.213.191.237:88 rl.a4on.tv tcp

Files

C:\Users\Admin\AppData\Local\Temp\settings3.bin

MD5 f838d1578bc4d82548905dace1b90da5
SHA1 b8af4026c5929865ec38d625a36255c75e9275e3
SHA256 095180d4e0c40b34a0f837f7f053b6a8daaf1f710eda6a38c4ec17598e5df8d3
SHA512 ebd35ccb3167b4ee0dc015f8314c506035d8590722244833d199669264de0429983ff778d85a5b7e797c683d6b87c27f8a5fb710e21b5372df623ed826eaa89b

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-18 01:27

Reported

2024-10-18 01:29

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.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\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = d0657d227fa6c743033abd475b904d44033f1c3db082785112e3888ad75b6c28e9b03b4b888d023159012b57501431bd5fafa4fb4364dde986f841bc35b0273467495e562229a912d470df64 C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe

"C:\Users\Admin\AppData\Local\Temp\0498fcaffbcc80f86c8a6cb1ef655b9713bd96e2d08af2468570d087caa53ff7.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 rl.a4on.tv udp
US 8.8.8.8:53 g.bing.com udp
RU 95.213.191.237:80 rl.a4on.tv tcp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
RU 95.213.191.237:88 rl.a4on.tv tcp
US 8.8.8.8:53 237.191.213.95.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

C:\Users\Admin\AppData\Local\Temp\settings3.bin

MD5 bd748b2d9f2bcc462be4255e472b9c89
SHA1 ddf4c54a9f7f8d3fc38b77f23545fd265a4fd3ae
SHA256 77ed55e5feb0e387f0c6b6e9090cc4e52267bd49a1e96682958cf386f008527f
SHA512 edf23d8e669afd43108fd5530783e0b5e9c9634fc9a5b336bfd451ae3d666450ffe24a8c37e32d5c4a43d58454030586381f4590f21633607db1f0d638be3b50