Analysis Overview
SHA256
5b23cda7e61a7e54331995b5eab48efd59ff50455881027ea8bd5cd70a6833a0
Threat Level: Known bad
The file AsyncClient.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
Unsigned PE
Enumerates physical storage devices
Creates scheduled task(s)
Suspicious use of WriteProcessMemory
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Delays execution with timeout.exe
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-01 20:55
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
2024-03-01 20:55
Reported
2024-03-01 20:58
Platform
win10-20240221-en
Max time kernel
148s
Max time network
156s
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\test.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\timeout.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\test.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFED2.tmp.bat""
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
C:\Windows\SysWOW64\timeout.exe
timeout 3
C:\Users\Admin\AppData\Roaming\test.exe
"C:\Users\Admin\AppData\Roaming\test.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | FearME-55506.portmap.host | udp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
Files
memory/192-0-0x00000000007E0000-0x00000000007F2000-memory.dmp
memory/192-1-0x0000000073E70000-0x000000007455E000-memory.dmp
memory/192-2-0x00000000012B0000-0x00000000012C0000-memory.dmp
memory/192-3-0x0000000005190000-0x000000000522C000-memory.dmp
memory/192-8-0x0000000073E70000-0x000000007455E000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmpFED2.tmp.bat
| MD5 | c910cec0bd28b6fa70c0d6e4440b0512 |
| SHA1 | 62b42e7925e925a003c15af6537fd67d786644c2 |
| SHA256 | 67b0dc44c8eaef07107eac1b919eb976ac644f894bd30cf6bd83e4009c584a70 |
| SHA512 | 83d68a61dbc906665280cde3f33d84135978bee5ccf4e48bbb10cb88de6348c3a3f6dbbc45c491024c792ccab4c4985bf464b80dc16e563a4813db442b9938c0 |
C:\Users\Admin\AppData\Roaming\test.exe
| MD5 | 1318c166e2823474696400cb49c69019 |
| SHA1 | 41cac1850c0e996752475baa19716b0dfcf88351 |
| SHA256 | 5b23cda7e61a7e54331995b5eab48efd59ff50455881027ea8bd5cd70a6833a0 |
| SHA512 | 1fad54e3f6b8c1ac376456aa4f3be361898e9126955425f75181a7f9d2e28e09597a60a7ccd8588af47ebad9b3672ab53e09321b82bc51df4536442c96bc157f |
memory/244-13-0x0000000073DD0000-0x00000000744BE000-memory.dmp
memory/244-14-0x0000000005850000-0x0000000005860000-memory.dmp
memory/244-15-0x0000000073DD0000-0x00000000744BE000-memory.dmp
memory/244-16-0x0000000005850000-0x0000000005860000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-03-01 20:55
Reported
2024-03-01 20:58
Platform
win10v2004-20240226-en
Max time kernel
151s
Max time network
151s
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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\test.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\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\AsyncClient.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\test.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp335F.tmp.bat""
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
C:\Windows\SysWOW64\timeout.exe
timeout 3
C:\Users\Admin\AppData\Roaming\test.exe
"C:\Users\Admin\AppData\Roaming\test.exe"
C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4264 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 133.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 5.179.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 88.156.103.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | FearME-55506.portmap.host | udp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| US | 8.8.8.8:53 | 23.160.77.104.in-addr.arpa | udp |
| US | 8.8.8.8:53 | chromewebstore.googleapis.com | udp |
| IE | 172.253.116.95:443 | chromewebstore.googleapis.com | tcp |
| IE | 172.253.116.95:443 | chromewebstore.googleapis.com | tcp |
| US | 8.8.8.8:53 | 95.116.253.172.in-addr.arpa | udp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 29.179.17.96.in-addr.arpa | udp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| US | 8.8.8.8:53 | 200.79.70.13.in-addr.arpa | udp |
| DE | 193.161.193.99:55506 | tcp |
Files
memory/1904-0-0x0000000074E30000-0x00000000755E0000-memory.dmp
memory/1904-1-0x0000000000920000-0x0000000000932000-memory.dmp
memory/1904-2-0x0000000005370000-0x0000000005380000-memory.dmp
memory/1904-3-0x0000000005420000-0x00000000054BC000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp335F.tmp.bat
| MD5 | 5fa55660c88c837db90adf9958fe28ce |
| SHA1 | f7e248a53f0f650a6f8e27427fba11e1c7010fa0 |
| SHA256 | 63a1a9a23023aa29057fc517ef1532b58f1824183765ee744800773a16c6fd70 |
| SHA512 | 7ba5d44d67cb74fb47cd3fc18d0a05530d73464f9fd3793569dd1d892f0ad9e65a8fedd48d8c2bb3974cd7311e2c720e92889a7bef9538a88d2f83c376be40fd |
memory/1904-9-0x0000000074E30000-0x00000000755E0000-memory.dmp
C:\Users\Admin\AppData\Roaming\test.exe
| MD5 | 1318c166e2823474696400cb49c69019 |
| SHA1 | 41cac1850c0e996752475baa19716b0dfcf88351 |
| SHA256 | 5b23cda7e61a7e54331995b5eab48efd59ff50455881027ea8bd5cd70a6833a0 |
| SHA512 | 1fad54e3f6b8c1ac376456aa4f3be361898e9126955425f75181a7f9d2e28e09597a60a7ccd8588af47ebad9b3672ab53e09321b82bc51df4536442c96bc157f |
memory/764-13-0x0000000074E30000-0x00000000755E0000-memory.dmp
memory/764-14-0x00000000053C0000-0x00000000053D0000-memory.dmp
memory/764-15-0x0000000074E30000-0x00000000755E0000-memory.dmp
memory/764-16-0x00000000053C0000-0x00000000053D0000-memory.dmp
Analysis: behavioral3
Detonation Overview
Submitted
2024-03-01 20:55
Reported
2024-03-01 20:57
Platform
win11-20240221-en
Max time kernel
146s
Max time network
150s
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\test.exe | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\schtasks.exe | N/A |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\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\AsyncClient.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Roaming\test.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6699.tmp.bat""
C:\Windows\SysWOW64\timeout.exe
timeout 3
C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
C:\Users\Admin\AppData\Roaming\test.exe
"C:\Users\Admin\AppData\Roaming\test.exe"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | FearME-55506.portmap.host | udp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:55506 | FearME-55506.portmap.host | tcp |
| DE | 193.161.193.99:5508 | FearME-55506.portmap.host | tcp |
Files
memory/4000-0-0x0000000000250000-0x0000000000262000-memory.dmp
memory/4000-1-0x0000000074C70000-0x0000000075421000-memory.dmp
memory/4000-2-0x0000000004D10000-0x0000000004D20000-memory.dmp
memory/4000-3-0x0000000004D20000-0x0000000004DBC000-memory.dmp
memory/4000-8-0x0000000074C70000-0x0000000075421000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp6699.tmp.bat
| MD5 | 373535f30badea65c0c6b4115711f4da |
| SHA1 | 919e3f7e01c705d0cf812c49e0920a539517bffe |
| SHA256 | 45b05de917e3250057cb33b00649b54d55b1b67cf83738517f4dd9445a74635a |
| SHA512 | feabb1b5cbe7e9408752f86693ef3a5e122d686df4f43f0b1b8a028c1744b5df1021529771530cbe68102832c5dc104a2ddc08e59fbd31b84f3081e320bbfb18 |
C:\Users\Admin\AppData\Roaming\test.exe
| MD5 | 1318c166e2823474696400cb49c69019 |
| SHA1 | 41cac1850c0e996752475baa19716b0dfcf88351 |
| SHA256 | 5b23cda7e61a7e54331995b5eab48efd59ff50455881027ea8bd5cd70a6833a0 |
| SHA512 | 1fad54e3f6b8c1ac376456aa4f3be361898e9126955425f75181a7f9d2e28e09597a60a7ccd8588af47ebad9b3672ab53e09321b82bc51df4536442c96bc157f |
memory/1584-13-0x0000000074BC0000-0x0000000075371000-memory.dmp
memory/1584-14-0x0000000005730000-0x0000000005740000-memory.dmp
memory/1584-15-0x0000000074BC0000-0x0000000075371000-memory.dmp
memory/1584-16-0x0000000005730000-0x0000000005740000-memory.dmp