asyncrat | 9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842

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 1 IoCs

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

resource	yara_rule
behavioral2/memory/4564-28-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3881032017-2947584075-2120384563-1000\Control Panel\International\Geo\Nation	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe

Executes dropped EXE 1 IoCs

pid	Process
4940	HiPatchService.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-1-5-21-3881032017-2947584075-2120384563-1000\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 4940 set thread context of 4564	4940	HiPatchService.exe	90

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	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
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

Checks processor information in registry 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2460	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe
4564	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4460 wrote to memory of 4940	4460	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	86
PID 4460 wrote to memory of 4940	4460	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	86
PID 4460 wrote to memory of 4940	4460	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	86
PID 4460 wrote to memory of 3428	4460	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	87
PID 4460 wrote to memory of 3428	4460	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	87
PID 4460 wrote to memory of 3428	4460	9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe	87
PID 3428 wrote to memory of 2460	3428	cmd.exe	89
PID 3428 wrote to memory of 2460	3428	cmd.exe	89
PID 3428 wrote to memory of 2460	3428	cmd.exe	89
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90
PID 4940 wrote to memory of 4564	4940	HiPatchService.exe	90

C:\Users\Admin\AppData\Local\Temp\9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe
"C:\Users\Admin\AppData\Local\Temp\9721eb18c2ff91ea66e952511785099d8f444f3263ae8f397b3cf962f1fd0842.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4460
- 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:4940
- - 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
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:4564
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3428
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2460

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:760

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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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
264e08c4f8c482a0c8d89380935846c9

SHA1
d652c0f62b98ded2b76ba7bb531a1a1f555bee27

SHA256
7a89f881609f20d3f558b5eee6fb52f8788786badb6f29afe459469c4363c25c

SHA512
68e2239e02b3e85be1030278ae76e55d84b93ae4956cce1385a0519cd72eaa159f029936eedcacccc16fb3818d8fd3aa743b4ad7fbdb87975edb85eb6b19cc55

Download Submit
memory/4460-6-0x0000000005720000-0x000000000572A000-memory.dmp

Filesize
40KB

Download
memory/4460-3-0x0000000005770000-0x0000000005802000-memory.dmp

Filesize
584KB

Download
memory/4460-4-0x0000000005730000-0x000000000573A000-memory.dmp

Filesize
40KB

Download
memory/4460-5-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/4460-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/4460-2-0x0000000005D20000-0x00000000062C4000-memory.dmp

Filesize
5.6MB

Download
memory/4460-24-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/4460-1-0x0000000000CF0000-0x0000000000D36000-memory.dmp

Filesize
280KB

Download
memory/4564-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4940-25-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/4940-27-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/4940-30-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads