Analysis Overview
SHA256
cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175
Threat Level: Known bad
The file assssss.exe was found to be: Known bad.
Malicious Activity Summary
AsyncRat
Asyncrat family
Async RAT payload
Async RAT payload
Executes dropped EXE
Checks computer location settings
Checks installed software on the system
Enumerates physical storage devices
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of SetWindowsHookEx
Delays execution with timeout.exe
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious use of AdjustPrivilegeToken
Uses Task Scheduler COM API
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-16 21:45
Signatures
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Asyncrat family
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-16 21:45
Reported
2024-04-16 21:48
Platform
win7-20240215-en
Max time kernel
149s
Max time network
149s
Command Line
Signatures
AsyncRat
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Host.exe | N/A |
Checks installed software on the system
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\assssss.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Host.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Host.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\assssss.exe
"C:\Users\Admin\AppData\Local\Temp\assssss.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"' & exit
C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1E2B.tmp.bat""
C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"'
C:\Windows\system32\timeout.exe
timeout 3
C:\Users\Admin\AppData\Local\Temp\Windows Host.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"
Network
| Country | Destination | Domain | Proto |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp | |
| US | 66.66.146.74:9511 | tcp |
Files
memory/2916-0-0x0000000000D20000-0x0000000000D38000-memory.dmp
memory/2916-2-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp
memory/2916-3-0x000000001AD50000-0x000000001ADD0000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp1E2B.tmp.bat
| MD5 | ea0b531ff1c470078c42fbeba83602f1 |
| SHA1 | 146342009c49a09bcfef925679b5eccfba176dad |
| SHA256 | e9dfb67091f0709e019a865c7a6466620e527c3a6269e79b140e77d63f81ca1a |
| SHA512 | 0758e8eb8e2dabbd853a6e5ada17633d6b79a9d5a00a8b1051047aa53e252be537dd98809cd4c0bf26087ced7f71c81d0e9cfdd74bb2c29e553ed0851a36fb64 |
memory/2916-4-0x0000000077060000-0x0000000077209000-memory.dmp
memory/2916-15-0x0000000077060000-0x0000000077209000-memory.dmp
memory/2916-14-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\Windows Host.exe
| MD5 | 00633c71d9fa6e703dacc8c6266b2613 |
| SHA1 | c673396470a64a46c5c96643aa7558a35722faf2 |
| SHA256 | cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175 |
| SHA512 | 840a93b7d5e992176f672618b8f4f23f0e697093656914525229555970dd91c19ceec1996d6d00d5ca372b029e944164d73d36d19994ad5c435618b6efa8f0cf |
memory/2872-19-0x00000000000C0000-0x00000000000D8000-memory.dmp
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
| MD5 | cf759e4c5f14fe3eec41b87ed756cea8 |
| SHA1 | c27c796bb3c2fac929359563676f4ba1ffada1f5 |
| SHA256 | c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761 |
| SHA512 | c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b |
memory/2872-20-0x000007FEF49A0000-0x000007FEF538C000-memory.dmp
memory/2872-22-0x0000000000690000-0x0000000000710000-memory.dmp
memory/2872-23-0x0000000077060000-0x0000000077209000-memory.dmp
memory/2872-41-0x000007FEF49A0000-0x000007FEF538C000-memory.dmp
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
| MD5 | 29f65ba8e88c063813cc50a4ea544e93 |
| SHA1 | 05a7040d5c127e68c25d81cc51271ffb8bef3568 |
| SHA256 | 1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184 |
| SHA512 | e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa |
C:\Users\Admin\AppData\Local\Temp\Tar799A.tmp
| MD5 | 435a9ac180383f9fa094131b173a2f7b |
| SHA1 | 76944ea657a9db94f9a4bef38f88c46ed4166983 |
| SHA256 | 67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34 |
| SHA512 | 1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a |
memory/2872-62-0x0000000000690000-0x0000000000710000-memory.dmp
memory/2872-73-0x0000000077060000-0x0000000077209000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-16 21:45
Reported
2024-04-16 21:48
Platform
win10v2004-20240412-en
Max time kernel
91s
Max time network
145s
Command Line
Signatures
AsyncRat
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-259785868-298165991-4178590326-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\assssss.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Host.exe | N/A |
Checks installed software on the system
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\assssss.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Host.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Windows Host.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\assssss.exe
"C:\Users\Admin\AppData\Local\Temp\assssss.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"' & exit
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp.bat""
C:\Windows\system32\timeout.exe
timeout 3
C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Windows Host" /tr '"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"'
C:\Users\Admin\AppData\Local\Temp\Windows Host.exe
"C:\Users\Admin\AppData\Local\Temp\Windows Host.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 68.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.237:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 9.228.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 237.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 66.66.146.74:9511 | tcp | |
| US | 8.8.8.8:53 | 74.146.66.66.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 157.123.68.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 68.126.19.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 249.197.17.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
Files
memory/3752-0-0x0000000000BF0000-0x0000000000C08000-memory.dmp
memory/3752-2-0x00007FFC37440000-0x00007FFC37F01000-memory.dmp
memory/3752-3-0x0000000001300000-0x0000000001310000-memory.dmp
memory/3752-9-0x00007FFC37440000-0x00007FFC37F01000-memory.dmp
memory/3752-8-0x00007FFC55290000-0x00007FFC55485000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp.bat
| MD5 | 00c6c88d19ba8404bc58f6e70cba315d |
| SHA1 | 099977f554b15af32cd00952ddd84f51ac65cd6a |
| SHA256 | 0732ec475975b282633087e3d9c1bf4d5daf7bbdb967d41d659159ed9e7416cd |
| SHA512 | a81b9196cd2fd615d144f5feb8b80bf778dd66a1778769f3fc017332f5a56bbe3acef5f10bb22f3a1a9aa520f91cbdcacbc1fa58e14636e81e0513cfc4961a6d |
C:\Users\Admin\AppData\Local\Temp\Windows Host.exe
| MD5 | 00633c71d9fa6e703dacc8c6266b2613 |
| SHA1 | c673396470a64a46c5c96643aa7558a35722faf2 |
| SHA256 | cef1b063659f6f90cb4a3d0dc14295919ea7c11020918d9c3a01a7705dd2e175 |
| SHA512 | 840a93b7d5e992176f672618b8f4f23f0e697093656914525229555970dd91c19ceec1996d6d00d5ca372b029e944164d73d36d19994ad5c435618b6efa8f0cf |
C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
| MD5 | cf759e4c5f14fe3eec41b87ed756cea8 |
| SHA1 | c27c796bb3c2fac929359563676f4ba1ffada1f5 |
| SHA256 | c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761 |
| SHA512 | c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b |
memory/2744-15-0x00007FFC37440000-0x00007FFC37F01000-memory.dmp
memory/2744-16-0x000000001B700000-0x000000001B710000-memory.dmp
memory/2744-17-0x000000001B700000-0x000000001B710000-memory.dmp
memory/2744-18-0x00007FFC37440000-0x00007FFC37F01000-memory.dmp
memory/2744-19-0x000000001B700000-0x000000001B710000-memory.dmp
memory/2744-20-0x000000001B700000-0x000000001B710000-memory.dmp
memory/2744-21-0x000000001B700000-0x000000001B710000-memory.dmp