Malware Analysis Report

2024-10-24 20:55

Sample ID 230604-mwxnxsce4w
Target AA39_55.exe
SHA256 e682ea6f18a526c3f0d8e7b6f3673b05e8e211a29fe3274423756d4731289224
Tags
ammyyadmin flawedammyy trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

e682ea6f18a526c3f0d8e7b6f3673b05e8e211a29fe3274423756d4731289224

Threat Level: Known bad

The file AA39_55.exe was found to be: Known bad.

Malicious Activity Summary

ammyyadmin flawedammyy trojan

FlawedAmmyy RAT

AmmyyAdmin payload

Ammyyadmin family

Checks computer location settings

Unsigned PE

Suspicious use of WriteProcessMemory

Modifies data under HKEY_USERS

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-06-04 10:49

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

2023-06-04 10:49

Reported

2023-06-04 10:52

Platform

win7-20230220-en

Max time kernel

150s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1283023626-844874658-3193756055-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 98c92d755a787efb89ea7f545a4ec49065e103fc49fd63397f9323a5b2a20bd702eeccf28d522cb25dfa14dde9a222788f5d4b88e5a688765f327163b597ae58edaf75fe7d C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 acsm.ru udp
RU 77.106.252.188:80 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp

Files

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

MD5 8411a75a1e371db9594e9943e3c6c850
SHA1 575abe26802724d1436d6083ff17802bc66a793c
SHA256 1a621d89ef9377869faf8c6bf1af7e6a370d12054f21ecdeb9ba266815929d10
SHA512 b83f349899a9c4a99a50120d5d55a6d4ded9373db3dbf26a24abf4e80254a1119483ec00d0fb58b13ade78a868705b5f55cfc829ffc12082a54e7111c34c1fc3

Analysis: behavioral2

Detonation Overview

Submitted

2023-06-04 10:49

Reported

2023-06-04 10:52

Platform

win10v2004-20230220-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-144354903-2550862337-1367551827-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 9396c914ce3760e0e059b10c9578c125d51be90b39cd7ce46bc6d515a962fe6ba6d72aaef777e9c05e0ee1b338c2ee19ba51ac9333fe81da43d46f92a314afb8cd74f5c4ee C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\AA39_55.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\AA39_55.exe

"C:\Users\Admin\AppData\Local\Temp\AA39_55.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 acsm.ru udp
US 8.8.8.8:53 141.145.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
RU 77.106.252.188:80 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 8.8.8.8:53 188.252.106.77.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
RU 77.106.252.188:48654 acsm.ru tcp
US 52.242.101.226:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 20.189.173.4:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 93.184.221.240:80 tcp
NL 173.223.113.164:443 tcp
NL 173.223.113.131:80 tcp
US 204.79.197.203:80 tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 8.8.8.8:53 2.77.109.52.in-addr.arpa udp
US 52.242.101.226:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 52.242.101.226:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 52.242.101.226:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 52.242.101.226:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp
US 52.242.101.226:443 tcp
RU 77.106.252.188:48654 acsm.ru tcp
RU 77.106.252.188:48654 acsm.ru tcp

Files

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

MD5 8411a75a1e371db9594e9943e3c6c850
SHA1 575abe26802724d1436d6083ff17802bc66a793c
SHA256 1a621d89ef9377869faf8c6bf1af7e6a370d12054f21ecdeb9ba266815929d10
SHA512 b83f349899a9c4a99a50120d5d55a6d4ded9373db3dbf26a24abf4e80254a1119483ec00d0fb58b13ade78a868705b5f55cfc829ffc12082a54e7111c34c1fc3