Analysis Overview
SHA256
b324d1b19e6c6eff0efb46fbee13d56a71ecdf1f3891a30f3435ba671adf07f0
Threat Level: Known bad
The file Dllhost.exe was found to be: Known bad.
Malicious Activity Summary
AsyncRat
Async RAT payload
Asyncrat family
Async RAT payload
Executes dropped EXE
Unsigned PE
Enumerates physical storage devices
Suspicious use of WriteProcessMemory
Suspicious use of SetWindowsHookEx
Modifies registry class
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Delays execution with timeout.exe
Suspicious use of AdjustPrivilegeToken
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-20 18:40
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
2024-06-20 18:40
Reported
2024-06-20 18:43
Platform
win11-20240611-en
Max time kernel
148s
Max time network
151s
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\dllhost.exe | N/A |
Enumerates physical storage devices
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-1560405787-796225086-678739705-1000_Classes\Local Settings\MuiCache | C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe | N/A |
Scheduled Task/Job: Scheduled Task
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Dllhost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\dllhost.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\dllhost.exe | N/A |
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Dllhost.exe
"C:\Users\Admin\AppData\Local\Temp\Dllhost.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"' & exit
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp8B48.tmp.bat""
C:\Windows\SysWOW64\timeout.exe
timeout 3
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "dllhost" /tr '"C:\Users\Admin\AppData\Roaming\dllhost.exe"'
C:\Users\Admin\AppData\Roaming\dllhost.exe
"C:\Users\Admin\AppData\Roaming\dllhost.exe"
C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 4.tcp.eu.ngrok | udp |
Files
memory/2436-0-0x00000000751FE000-0x00000000751FF000-memory.dmp
memory/2436-1-0x0000000000880000-0x0000000000892000-memory.dmp
memory/2436-2-0x00000000751F0000-0x00000000759A1000-memory.dmp
memory/2436-3-0x00000000052E0000-0x0000000005346000-memory.dmp
memory/2436-4-0x0000000005780000-0x000000000581C000-memory.dmp
memory/2436-9-0x00000000751F0000-0x00000000759A1000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp8B48.tmp.bat
| MD5 | 8d2a88f6de9fdca789c4843f2bd1aa99 |
| SHA1 | 9274d676172c76fad9ffe1720574acc7309275f2 |
| SHA256 | c8e7887b91d832fc0aeed742cdb2e336b05d9a43f86e411d77e5e80ceaaf4f6a |
| SHA512 | a6e6f2ad2e63d3636d22deaf87ff16c1e113358a7007bb72b39c82d7ae5cd44bba7fa0c44e024e8d1f439151e371172bad3c87eb920724d9b7542d3e54e442a8 |
C:\Users\Admin\AppData\Roaming\dllhost.exe
| MD5 | 87bc62c9412b158944dcd660b65c1fc9 |
| SHA1 | bf2541d0537f58440738c9b6a8f43b3da95588cc |
| SHA256 | b324d1b19e6c6eff0efb46fbee13d56a71ecdf1f3891a30f3435ba671adf07f0 |
| SHA512 | 9d6b2c0b8e1768307b4a7f5ca4b6b6f5720b1882271ba666ff1e24b8560b77c47b478122abec5b6c660eb7acb74ec46818dc2ba373fdad999b1623e170ee82fd |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\dllhost.exe.log
| MD5 | fece27917067365b631bc648c66fe066 |
| SHA1 | f12c84b1c2b1296091ee06e8654c7065d22cbb44 |
| SHA256 | 93e03593374ce40bc5d4c57832ebe96d3a6a532766eb6385f568a0383b426d10 |
| SHA512 | 9b502a6d46b82ccc2c8aff650de664299f0131a82480eb9cec701546e9cd7f1647c0665014035c19da80a6cab267cf896645af827ecdd95287a70994c1ecb662 |
memory/976-15-0x0000000075140000-0x00000000758F1000-memory.dmp
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
| MD5 | 9a7af7f1f08f7de9da3ba647286ee5a6 |
| SHA1 | d7a23961ba5f8c4242a03f20686ff516c2ae432c |
| SHA256 | dddc3d322b46ec53927c26326a4f4d573dec131fbe668450f984c91c3104a08b |
| SHA512 | 64b0d94e68aa2d0ee9d02f170de6989f5255c5c57d05dffbf4dbbe012dae43a6f4dbd59c6a85fd2621fb84ae7f4cdf486a089b90e3e6c4fce1b152ba5aa6ba58 |
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
| MD5 | 35745802ec2865acb4c60e651e5a8620 |
| SHA1 | f10c746a71c2741790aa3f5160ea7d9be1a1920a |
| SHA256 | ef386e977e9fcfc811f2710d0d630e23e2278cf9811770da0c2f10f3965b7a63 |
| SHA512 | 0031f739cafa1089dc655a3509bc215fc900c20734507a1b0b69f1ad1567fb2fe4af725360cf952a4689e89973bbd59a53ea6ff8bd6c4c67b9e732f66f14a42f |
memory/976-36-0x0000000075140000-0x00000000758F1000-memory.dmp