Analysis Overview
SHA256
e4a87095c27219afe9c7a3cb01c13de899e201d2340748a5fc446207c8f99b2a
Threat Level: Known bad
The file AMMYY_Admin.exe was found to be: Known bad.
Malicious Activity Summary
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
Enterprise Matrix V15
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
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
Signatures
FlawedAmmyy RAT
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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 3828 wrote to memory of 3708 | N/A | C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe | C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe |
| PID 3828 wrote to memory of 3708 | N/A | C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe | C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe |
| PID 3828 wrote to memory of 3708 | N/A | C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe | C:\Users\Admin\AppData\Local\Temp\AMMYY_Admin.exe |
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 |