asyncrat | c4fc07ee159833de867dba73696d99b8204af6155c532966f7f05b88eddc33ee

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	AsyncClient.exe

Executes dropped EXE 1 IoCs

pid	Process
968	dad.exe

Enumerates connected drives 3 TTPs 23 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
File opened (read-only)	\??\V:	mstsc.exe
File opened (read-only)	\??\W:	mstsc.exe
File opened (read-only)	\??\B:	mstsc.exe
File opened (read-only)	\??\G:	mstsc.exe
File opened (read-only)	\??\H:	mstsc.exe
File opened (read-only)	\??\I:	mstsc.exe
File opened (read-only)	\??\N:	mstsc.exe
File opened (read-only)	\??\P:	mstsc.exe
File opened (read-only)	\??\X:	mstsc.exe
File opened (read-only)	\??\R:	mstsc.exe
File opened (read-only)	\??\T:	mstsc.exe
File opened (read-only)	\??\A:	mstsc.exe
File opened (read-only)	\??\J:	mstsc.exe
File opened (read-only)	\??\K:	mstsc.exe
File opened (read-only)	\??\O:	mstsc.exe
File opened (read-only)	\??\Y:	mstsc.exe
File opened (read-only)	\??\Z:	mstsc.exe
File opened (read-only)	\??\E:	mstsc.exe
File opened (read-only)	\??\L:	mstsc.exe
File opened (read-only)	\??\M:	mstsc.exe
File opened (read-only)	\??\Q:	mstsc.exe
File opened (read-only)	\??\S:	mstsc.exe
File opened (read-only)	\??\U:	mstsc.exe

Browser Information Discovery 1 TTPs
Enumerate browser information.
discovery

Browser Information Discovery
T1217
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AsyncClient.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Checks SCSI registry key(s) 3 TTPs 6 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000\Device Parameters	mstsc.exe
Key security queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters	mstsc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\TSRedirFlags	mstsc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000\Device Parameters	mstsc.exe
Key security queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\Device Parameters	mstsc.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\Device Parameters\TSRedirFlags	mstsc.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2824	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
3316	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1404	AsyncClient.exe
1584	msedge.exe
1584	msedge.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1404	AsyncClient.exe
Token: SeDebugPrivilege	968	dad.exe
Token: SeDebugPrivilege	1012	whoami.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3352	SystemSettingsAdminFlows.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 1240	1404	AsyncClient.exe	85
PID 1404 wrote to memory of 1240	1404	AsyncClient.exe	85
PID 1404 wrote to memory of 1240	1404	AsyncClient.exe	85
PID 1404 wrote to memory of 1164	1404	AsyncClient.exe	87
PID 1404 wrote to memory of 1164	1404	AsyncClient.exe	87
PID 1404 wrote to memory of 1164	1404	AsyncClient.exe	87
PID 1164 wrote to memory of 2824	1164	cmd.exe	89
PID 1164 wrote to memory of 2824	1164	cmd.exe	89
PID 1164 wrote to memory of 2824	1164	cmd.exe	89
PID 1240 wrote to memory of 3316	1240	cmd.exe	90
PID 1240 wrote to memory of 3316	1240	cmd.exe	90
PID 1240 wrote to memory of 3316	1240	cmd.exe	90
PID 1164 wrote to memory of 968	1164	cmd.exe	91
PID 1164 wrote to memory of 968	1164	cmd.exe	91
PID 1164 wrote to memory of 968	1164	cmd.exe	91
PID 3500 wrote to memory of 2324	3500	msedge.exe	117
PID 3500 wrote to memory of 2324	3500	msedge.exe	117
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1736	3500	msedge.exe	118
PID 3500 wrote to memory of 1584	3500	msedge.exe	119
PID 3500 wrote to memory of 1584	3500	msedge.exe	119
PID 3500 wrote to memory of 2776	3500	msedge.exe	120
PID 3500 wrote to memory of 2776	3500	msedge.exe	120
PID 3500 wrote to memory of 2776	3500	msedge.exe	120
PID 3500 wrote to memory of 2776	3500	msedge.exe	120
PID 3500 wrote to memory of 2776	3500	msedge.exe	120

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dad" /tr '"C:\Users\Admin\AppData\Roaming\dad.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1240
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dad" /tr '"C:\Users\Admin\AppData\Roaming\dad.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3316
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpDE3A.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1164
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2824
- - C:\Users\Admin\AppData\Roaming\dad.exe
    "C:\Users\Admin\AppData\Roaming\dad.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:968

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --default-search-provider=? --out-pipe-name=MSEdgeDefaulte587804ah2a39h4a00h97aaha8ffe5105990
1⤵
- Suspicious use of WriteProcessMemory
PID:3500
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x120,0x124,0x128,0xfc,0x12c,0x7fffd69546f8,0x7fffd6954708,0x7fffd6954718
  2⤵
  PID:2324
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2128,7908057041437692718,1191529641797760613,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2144 /prefetch:2
  2⤵
  PID:1736
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2128,7908057041437692718,1191529641797760613,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2232 /prefetch:3
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:1584
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2128,7908057041437692718,1191529641797760613,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2832 /prefetch:8
  2⤵
  PID:2776

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:4376

C:\Windows\System32\CompPkgSrv.exe
C:\Windows\System32\CompPkgSrv.exe -Embedding
1⤵
PID:1976

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService
1⤵
PID:4736

C:\Windows\system32\SystemSettingsAdminFlows.exe
"C:\Windows\system32\SystemSettingsAdminFlows.exe" RemoteDesktopTurnOnRdp
1⤵
- Suspicious use of SetWindowsHookEx
PID:3352

C:\Windows\system32\mstsc.exe
"C:\Windows\system32\mstsc.exe"
1⤵
- Enumerates connected drives
- Checks SCSI registry key(s)
PID:4160

C:\Windows\system32\cmd.exe
"C:\Windows\system32\cmd.exe"
1⤵
PID:3716
- C:\Windows\system32\whoami.exe
  whoami
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Credential Access

Discovery

Browser Information Discovery

T1217

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery