Malware Analysis Report

2024-10-16 05:10

Sample ID 231201-sfsmxsah71
Target d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe.zip
SHA256 480db250da8cbb3234c64ce8d30e119addb3f2e515332a1da113d9e7b12142fd
Tags
ammyyadmin flawedammyy 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

480db250da8cbb3234c64ce8d30e119addb3f2e515332a1da113d9e7b12142fd

Threat Level: Known bad

The file d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe.zip was found to be: Known bad.

Malicious Activity Summary

ammyyadmin flawedammyy trojan

AmmyyAdmin payload

FlawedAmmyy RAT

Ammyyadmin family

Checks computer location settings

Drops file in System32 directory

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Modifies data under HKEY_USERS

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-01 15:04

Signatures

AmmyyAdmin payload

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

Ammyyadmin family

ammyyadmin

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-01 15:04

Reported

2023-12-01 15:26

Platform

win7-20231025-en

Max time kernel

158s

Max time network

182s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1861898231-3446828954-4278112889-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\SOFTWARE\Ammyy\Admin\hr3 = 146bf89741ddcbc532b05738993014f4b822e1f734eaa944abbb81098eacca0442f5a060c2f7c1a79929996463b343a36db920f1f45f288f21271414419ff73c25243d24 C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe"

C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 rl.ammyy.com udp
NL 188.42.129.148:80 rl.ammyy.com tcp
DE 136.243.104.242:443 tcp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 bcc40b676c5b0f5a176be92cc8f4199f
SHA1 5415364e6ab90151eb1272268cb75ef6c4306a2f
SHA256 d3df407118bd28d28e7d3c8afc497c5e478e5d078f7792501ddecb45f3b51826
SHA512 467c473be5b9f6e0b8302620b6fbd9ad84f90da2bae3247d8326a22bfdd902fd79e55a2160493903eb747db6ef38fc9decb3db372afa26667f374ca2d0ceb36d

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-01 15:04

Reported

2023-12-01 15:27

Platform

win10v2004-20231127-en

Max time kernel

151s

Max time network

137s

Command Line

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe"

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\History\History.IE5 C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.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\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 783639687a8907d6cbedb2bbf33cf4311ba673f4440fdc11d7dec1406ce7a173fbd4b6edb53bff010e1b960972d5446c034c82a0fe3f31ea71463d2290d2406c1b6051ba C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Content\CachePrefix C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\Cookies\CachePrefix = "Cookie:" C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\5.0\Cache\History\CachePrefix = "Visited:" C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe"

C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe" -service -lunch

C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe

"C:\Users\Admin\AppData\Local\Temp\d67c7ef1c8e2cd56e266902bef814ac328d64bbe06086f4ee24fbadbebf39605.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 rl.ammyy.com udp
US 8.8.8.8:53 193.78.101.95.in-addr.arpa udp
NL 188.42.129.148:80 rl.ammyy.com tcp
DE 136.243.104.235:443 tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 148.129.42.188.in-addr.arpa udp
US 8.8.8.8:53 235.104.243.136.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 198.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 58.252.72.23.in-addr.arpa udp
US 8.8.8.8:53 3.173.189.20.in-addr.arpa udp

Files

C:\ProgramData\AMMYY\settings3.bin

MD5 bcc40b676c5b0f5a176be92cc8f4199f
SHA1 5415364e6ab90151eb1272268cb75ef6c4306a2f
SHA256 d3df407118bd28d28e7d3c8afc497c5e478e5d078f7792501ddecb45f3b51826
SHA512 467c473be5b9f6e0b8302620b6fbd9ad84f90da2bae3247d8326a22bfdd902fd79e55a2160493903eb747db6ef38fc9decb3db372afa26667f374ca2d0ceb36d