Analysis Overview
SHA256
e682ea6f18a526c3f0d8e7b6f3673b05e8e211a29fe3274423756d4731289224
Threat Level: Known bad
The file AA39_55.exe was found to be: Known bad.
Malicious Activity Summary
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
Enterprise Matrix V6
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
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
Signatures
FlawedAmmyy RAT
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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 1756 wrote to memory of 1964 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 1756 wrote to memory of 1964 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 1756 wrote to memory of 1964 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 1756 wrote to memory of 1964 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
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
Signatures
FlawedAmmyy RAT
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 |
Suspicious use of WriteProcessMemory
| Description | Indicator | Process | Target |
| PID 4232 wrote to memory of 2196 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 4232 wrote to memory of 2196 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 4232 wrote to memory of 2196 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
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 |