Analysis Overview
SHA256
e682ea6f18a526c3f0d8e7b6f3673b05e8e211a29fe3274423756d4731289224
Threat Level: Known bad
The file AA39_55.exe was found to be: Known bad.
Malicious Activity Summary
Ammyyadmin family
FlawedAmmyy RAT
AmmyyAdmin payload
Checks computer location settings
Unsigned PE
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Modifies data under HKEY_USERS
Suspicious use of FindShellTrayWindow
MITRE ATT&CK
Enterprise Matrix V6
Analysis: static1
Detonation Overview
Reported
2023-06-15 11:39
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
2023-06-15 11:39
Reported
2023-06-15 11:42
Platform
win7-20230220-en
Max time kernel
150s
Max time network
120s
Command Line
Signatures
FlawedAmmyy RAT
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-1563773381-2037468142-1146002597-1000\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\Ammyy\Admin | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | N/A |
| Set value (data) | \REGISTRY\USER\.DEFAULT\Software\Ammyy\Admin\hr3 = 4fe92555c3a89bd846ec5c00966bbe46c3fecdc9fe4a299b6ce4fc0440a4393625f89efd7f8ea7eeec5618550ccd3ec013830903c6d49ca6ee864dfdf469f5c1e9f8a2960e | 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 |
| 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 |
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 1632 wrote to memory of 1928 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 1632 wrote to memory of 1928 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 1632 wrote to memory of 1928 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 1632 wrote to memory of 1928 | 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
2023-06-15 11:39
Reported
2023-06-15 11:42
Platform
win10v2004-20230220-en
Max time kernel
150s
Max time network
153s
Command Line
Signatures
FlawedAmmyy RAT
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-2548970870-3691742953-3895070203-1000\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 = c6b7b322b342d05050eb5e1807896173d91ba225c97b9f63575a8daf1e3d9c924cc0b58861c3fa7173f0f27c8a00a8b5070677475ed2c04e828a18ade2106af9c2bf78bf29 | 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 4400 wrote to memory of 2828 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 4400 wrote to memory of 2828 | N/A | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe | C:\Users\Admin\AppData\Local\Temp\AA39_55.exe |
| PID 4400 wrote to memory of 2828 | 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 | 254.22.238.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 228.249.119.40.in-addr.arpa | udp |
| 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 |
| US | 8.8.8.8:53 | 188.252.106.77.in-addr.arpa | udp |
| SG | 20.43.150.84:443 | tcp | |
| US | 8.8.8.8:53 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | 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 | 8.8.8.8:53 | 209.205.72.20.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 52.152.110.14:443 | tcp | |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 52.152.110.14:443 | tcp | |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 52.152.110.14:443 | tcp | |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 52.152.110.14:443 | tcp | |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 8.8.8.8:53 | 233.141.123.20.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 52.152.110.14:443 | tcp | |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 52.152.110.14:443 | 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 | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 33.146.190.20.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 40.125.122.151:443 | tcp | |
| US | 8.8.8.8:53 | 42.220.44.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 0.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.103.197.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 93.184.221.240:80 | tcp | |
| US | 40.125.122.151:443 | tcp | |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 2.36.159.162.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.31.95.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 103.169.127.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | acsm.ru | 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 | 206.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 99.113.223.173.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 8.8.8.8:53 | 119.110.54.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 250.255.255.239.in-addr.arpa | udp |
| RU | 77.106.252.188:48654 | acsm.ru | tcp |
| US | 8.8.8.8:53 | 254.23.238.8.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.121.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.81.21.72.in-addr.arpa | udp |
| 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 |