asyncrat | 9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842

Analysis

max time kernel
148s
max time network
120s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
01-08-2024 01:44

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General

Target

9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe
Size

266KB
MD5

52b871709702c3274059da027fab92fb
SHA1

a6a5c0db9087e2e5e2606c4792e5ba41a87acf25
SHA256

9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842
SHA512

e4001437082c4d7d190fcace9cfc7b86d7b96b8d4bb0a36f6fb9d586471245d4e91ee2c46e9d563d979c57f153c0790c49809ccf49180b072ad99e8f5e1438a2
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8G:WFzDqa86hV6uRRqX1evPlwAEH

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Contains code to disable Windows Defender 5 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral1/memory/2916-36-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2916-35-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2916-34-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2916-31-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2916-29-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Executes dropped EXE 1 IoCs

pid	Process
1988	HiPatchService.exe

Loads dropped DLL 1 IoCs

pid	Process
328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1988 set thread context of 2916	1988	HiPatchService.exe	35

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 5 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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2836	timeout.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe
2916	RegAsm.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 1988	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	31
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 328 wrote to memory of 2320	328	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	32
PID 2320 wrote to memory of 2836	2320	cmd.exe	34
PID 2320 wrote to memory of 2836	2320	cmd.exe	34
PID 2320 wrote to memory of 2836	2320	cmd.exe	34
PID 2320 wrote to memory of 2836	2320	cmd.exe	34
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35
PID 1988 wrote to memory of 2916	1988	HiPatchService.exe	35

C:\Users\Admin\AppData\Local\Temp\9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe
"C:\Users\Admin\AppData\Local\Temp\9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:328
- C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
  "C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1988
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2916
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2320
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2836

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2232

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat

Filesize
213B

MD5
0955cb4b691d44b37f8b6fad48a33b8e

SHA1
9dae759ae014cc124ab6eed7c8035788c124ae4a

SHA256
9092dbb1ca1767d1966b7f79349dd95a802a68248251bf070c0f1d74d5681d71

SHA512
08b868a028c1e8d29ed643416850df16f58d44668f9193b46bd3934965e5617a0a4015fc52815c5456023dbde01023450d295b76d936a936f26b602e764b0235

Download Submit
C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe

Filesize
266KB

MD5
6da99ef274c13b6cd442461b811e8632

SHA1
edd9d9892b0deec26ea9ff40dca779e2c5f0d858

SHA256
99c79fc2ac25ccdeeac48a59f1a37387617d3c2099a56558710a10bbc8d95d2d

SHA512
ad2dd3883a24e216c70a31ea469cd783e37424713b2f843305cf4499eba3bff9e515ff3980c5df5d379dfdce02e53eadef924dd6d16828ee16ece4f0edb29563

Download Submit
memory/328-0-0x0000000074CAE000-0x0000000074CAF000-memory.dmp

Filesize
4KB

Download
memory/328-1-0x0000000000F10000-0x0000000000F56000-memory.dmp

Filesize
280KB

Download
memory/328-2-0x0000000000320000-0x000000000032A000-memory.dmp

Filesize
40KB

Download
memory/328-3-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/328-24-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/1988-21-0x0000000001220000-0x0000000001266000-memory.dmp

Filesize
280KB

Download
memory/1988-23-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/1988-37-0x0000000074CA0000-0x000000007538E000-memory.dmp

Filesize
6.9MB

Download
memory/2916-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-34-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-33-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2916-31-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-27-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-25-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2916-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download