Analysis Overview
SHA256
76abd8184eddb0834ba5174e9520b060835a99dc3c7a07ef11e44088c798a7e8
Threat Level: Known bad
The file sachost.exe was found to be: Known bad.
Malicious Activity Summary
AsyncRat
Asyncrat family
Async RAT payload
Async RAT payload
Checks computer location settings
Executes dropped EXE
Enumerates physical storage devices
Unsigned PE
Suspicious use of WriteProcessMemory
Delays execution with timeout.exe
Uses Task Scheduler COM API
Suspicious behavior: EnumeratesProcesses
Checks SCSI registry key(s)
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of FindShellTrayWindow
Checks processor information in registry
Creates scheduled task(s)
Suspicious use of SendNotifyMessage
Suspicious use of AdjustPrivilegeToken
Modifies registry class
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-17 06:10
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: behavioral2
Detonation Overview
Submitted
2024-06-17 06:10
Reported
2024-06-17 06:12
Platform
win10v2004-20240611-en
Max time kernel
133s
Max time network
125s
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-1-5-21-200405930-3877336739-3533750831-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\$77-sachost.exe | N/A |
Enumerates physical storage devices
Checks SCSI registry key(s)
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 | C:\Windows\system32\taskmgr.exe | N/A |
| Key opened | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName | C:\Windows\system32\taskmgr.exe | N/A |
Checks processor information in registry
| Description | Indicator | Process | Target |
| Key opened | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 | C:\Windows\system32\taskmgr.exe | N/A |
| Key value queried | \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString | C:\Windows\system32\taskmgr.exe | N/A |
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 |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-200405930-3877336739-3533750831-1000_Classes\Local Settings | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\$77-sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\$77-sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeSystemProfilePrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| Token: SeCreateGlobalPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\sachost.exe
"C:\Users\Admin\AppData\Local\Temp\sachost.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77-sachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"' & exit
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp3F4B.tmp.bat""
C:\Windows\system32\timeout.exe
timeout 3
C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "$77-sachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"'
C:\Users\Admin\AppData\Roaming\$77-sachost.exe
"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 74.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.214.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| BE | 88.221.83.186:443 | www.bing.com | tcp |
| US | 8.8.8.8:53 | 186.83.221.88.in-addr.arpa | udp |
| US | 8.8.8.8:53 | environmental-blank.gl.at.ply.gg | udp |
| US | 147.185.221.19:25944 | environmental-blank.gl.at.ply.gg | tcp |
| US | 8.8.8.8:53 | 19.221.185.147.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.165.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 92.12.20.2.in-addr.arpa | udp |
| US | 147.185.221.19:25944 | environmental-blank.gl.at.ply.gg | tcp |
Files
memory/1428-0-0x00007FFD6C883000-0x00007FFD6C885000-memory.dmp
memory/1428-1-0x0000000000C80000-0x0000000000C96000-memory.dmp
memory/1428-2-0x00007FFD6C880000-0x00007FFD6D341000-memory.dmp
memory/1428-7-0x00007FFD6C880000-0x00007FFD6D341000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp3F4B.tmp.bat
| MD5 | 3d8e240b4d8d88a555670cc262aedba9 |
| SHA1 | 2ce8714379be04ce99d0d993b55c6cc6b9a34ebb |
| SHA256 | 1ee76d5c92903c6725d9154bbcaba17bbaca94fe333ff040038dc34da4d2d19f |
| SHA512 | 64bd2e0cfb68a344c90d5b96712fd9cfbae81af6b741ee2eaee9237be45e1696330846663c67e662dc3b76e57f29d7cbde204bbb5be8b887f864546775a11bf8 |
C:\Users\Admin\AppData\Roaming\$77-sachost.exe
| MD5 | 1dd350c26bb22547d4b15f12d94ab683 |
| SHA1 | 22677617c917f64ba53c2dae0d58cce49ee2366d |
| SHA256 | 76abd8184eddb0834ba5174e9520b060835a99dc3c7a07ef11e44088c798a7e8 |
| SHA512 | 9950e76fe089ab9dc9a505361620da3e93606d37c69e7bf7900f2405695b79238324e24db1c99223680be8ec772486d10695096c14dc3d3f96aae2d2b7425788 |
memory/1428-12-0x00007FFD6C880000-0x00007FFD6D341000-memory.dmp
memory/1348-13-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-14-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-15-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-22-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-25-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-24-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-23-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-21-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-20-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/1348-19-0x000001C4DF160000-0x000001C4DF161000-memory.dmp
memory/4636-26-0x000000001B240000-0x000000001B2B6000-memory.dmp
memory/4636-27-0x0000000002840000-0x0000000002874000-memory.dmp
memory/4636-28-0x00000000029B0000-0x00000000029CE000-memory.dmp
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-17 06:10
Reported
2024-06-17 06:12
Platform
win7-20240508-en
Max time kernel
25s
Max time network
25s
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\Roaming\$77-sachost.exe | N/A |
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
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\$77-sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\$77-sachost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of SendNotifyMessage
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
| N/A | N/A | C:\Windows\system32\taskmgr.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Users\Admin\AppData\Local\Temp\sachost.exe
"C:\Users\Admin\AppData\Local\Temp\sachost.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "$77-sachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"' & exit
C:\Windows\system32\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp1999.tmp.bat""
C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "$77-sachost" /tr '"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"'
C:\Windows\system32\timeout.exe
timeout 3
C:\Users\Admin\AppData\Roaming\$77-sachost.exe
"C:\Users\Admin\AppData\Roaming\$77-sachost.exe"
C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | environmental-blank.gl.at.ply.gg | udp |
| US | 8.8.8.8:53 | environmental-blank.gl.at.ply.gg | udp |
Files
memory/1732-0-0x000007FEF5D83000-0x000007FEF5D84000-memory.dmp
memory/1732-1-0x0000000000360000-0x0000000000376000-memory.dmp
memory/1732-2-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp
memory/1732-3-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp1999.tmp.bat
| MD5 | 3b51f9dd7bc3c4907c68f87fef8eea99 |
| SHA1 | 12ae2737af94051a3f4d83344f83334fd4f01d7b |
| SHA256 | 869d5aaecae654d59f58bc6489c02579d48c3d3a5acc3e03ea2b2cac5e428b56 |
| SHA512 | f28c21cb701568cd226ead0411ba0b3b91068415dbf15560264ac21e3e94c83b494f2d8bcbae380218428153fe8886c7c71734037f7c246660115baf2c72f25b |
memory/1732-13-0x000007FEF5D80000-0x000007FEF676C000-memory.dmp
C:\Users\Admin\AppData\Roaming\$77-sachost.exe
| MD5 | 1dd350c26bb22547d4b15f12d94ab683 |
| SHA1 | 22677617c917f64ba53c2dae0d58cce49ee2366d |
| SHA256 | 76abd8184eddb0834ba5174e9520b060835a99dc3c7a07ef11e44088c798a7e8 |
| SHA512 | 9950e76fe089ab9dc9a505361620da3e93606d37c69e7bf7900f2405695b79238324e24db1c99223680be8ec772486d10695096c14dc3d3f96aae2d2b7425788 |
memory/2628-17-0x00000000003A0000-0x00000000003B6000-memory.dmp
memory/2556-18-0x0000000140000000-0x00000001405E8000-memory.dmp
memory/2556-19-0x0000000140000000-0x00000001405E8000-memory.dmp