Malware Analysis Report

2024-10-16 05:10

Sample ID 230923-g72t5add4z
Target AMMYY_Admin.exe
SHA256 e4a87095c27219afe9c7a3cb01c13de899e201d2340748a5fc446207c8f99b2a
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 Overview

score
10/10

SHA256

e4a87095c27219afe9c7a3cb01c13de899e201d2340748a5fc446207c8f99b2a

Threat Level: Known bad

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

Malicious Activity Summary

ammyyadmin flawedammyy trojan

Ammyyadmin family

AmmyyAdmin payload

FlawedAmmyy RAT

Checks computer location settings

Drops file in System32 directory

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of SendNotifyMessage

Modifies data under HKEY_USERS

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-09-23 06:27

Signatures

AmmyyAdmin payload

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

Ammyyadmin family

ammyyadmin

Analysis: behavioral1

Detonation Overview

Submitted

2023-09-23 06:27

Reported

2023-09-23 06:27

Platform

win10-20230915-en

Max time kernel

8s

Max time network

13s

Command Line

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

Signatures

FlawedAmmyy RAT

trojan flawedammyy

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2445638973-2158012892-84912826-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157 C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\5037AC1E573F140500110A0B67548B5E C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCookies C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\103621DE9CD5414CC2538780B4B75751 C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.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\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\counters2.dat C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\103621DE9CD5414CC2538780B4B75751 C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\5037AC1E573F140500110A0B67548B5E C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
File opened for modification C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\Content.IE5 C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Key created \REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\OnDemandInterfaceCache C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Classes\Local Settings\MuiCache\1e\52C64B7E\LanguageList = 65006e002d0055005300000065006e0000000000 C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.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\AMMYY_Admin.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\IntranetName = "1" C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "0" C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "1" C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\WinTrust\Trust Providers\Software Publishing C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.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\AMMYY_Admin.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\AMMYY_Admin.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProxyBypass = "1" C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Processes

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

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

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

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

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

"C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.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
US 8.8.8.8:53 www.ammyy.com udp
US 8.8.8.8:53 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa udp
US 8.8.8.8:53 148.129.42.188.in-addr.arpa udp
DE 136.243.18.118:80 www.ammyy.com tcp
DE 136.243.18.118:443 www.ammyy.com tcp
US 8.8.8.8:53 118.18.243.136.in-addr.arpa udp
US 8.8.8.8:53 8.3.197.209.in-addr.arpa udp
US 8.8.8.8:53 147.174.42.23.in-addr.arpa udp
US 8.8.8.8:53 9.175.53.84.in-addr.arpa udp

Files

C:\ProgramData\AMMYY\settings.bin

MD5 090bba5cbe9cd62189310f633f14d686
SHA1 0ce1d78aace04650b0c592665686a89412c1771c
SHA256 7bc48188bbd0ad1b7ac10257e6a8fc5327f2ccfd56402a4353f6d8ef26eb0ff8
SHA512 846781bdb4d8902963f1859077c8db4c763fdd4ca28f0be83b95c20d324b5db030f312fc3d4f959dc05ca4f41ef872a49d123195494b16440e16ebcc5edb31a7