asyncrat | d026f3bf510f55633de34e9eb2181e530be7caf85c4a4aeb6ed5523db45573a3

General

Target

4ed6463ee5bff60d1e2b9323e37f0510N.exe
Size

266KB
MD5

4ed6463ee5bff60d1e2b9323e37f0510
SHA1

4f8c2e8d9b1c32e41f26b53afee0cfb16c61124d
SHA256

d026f3bf510f55633de34e9eb2181e530be7caf85c4a4aeb6ed5523db45573a3
SHA512

db100babd85a6dd27473f30e51f1c7c319d367a43cf1c3309adb1a554a402b9203b10c8d7bd3596b5a100e40141ced6fb3b02d4fab4e24001e38f38ca8d4d94f
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/sK:WFzDqa86hV6uRRqX1evPlwAEK

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/4060-28-0x0000000000400000-0x0000000000430000-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-1-5-21-1266786182-1874524688-71015548-1000\Control Panel\International\Geo\Nation	4ed6463ee5bff60d1e2b9323e37f0510N.exe

Executes dropped EXE 1 IoCs

pid	Process
328	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-1-5-21-1266786182-1874524688-71015548-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	4ed6463ee5bff60d1e2b9323e37f0510N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 328 set thread context of 4060	328	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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4ed6463ee5bff60d1e2b9323e37f0510N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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
1936	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe
4060	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 388 wrote to memory of 328	388	4ed6463ee5bff60d1e2b9323e37f0510N.exe	86
PID 388 wrote to memory of 328	388	4ed6463ee5bff60d1e2b9323e37f0510N.exe	86
PID 388 wrote to memory of 328	388	4ed6463ee5bff60d1e2b9323e37f0510N.exe	86
PID 388 wrote to memory of 5020	388	4ed6463ee5bff60d1e2b9323e37f0510N.exe	87
PID 388 wrote to memory of 5020	388	4ed6463ee5bff60d1e2b9323e37f0510N.exe	87
PID 388 wrote to memory of 5020	388	4ed6463ee5bff60d1e2b9323e37f0510N.exe	87
PID 5020 wrote to memory of 1936	5020	cmd.exe	89
PID 5020 wrote to memory of 1936	5020	cmd.exe	89
PID 5020 wrote to memory of 1936	5020	cmd.exe	89
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90
PID 328 wrote to memory of 4060	328	HiPatchService.exe	90

C:\Users\Admin\AppData\Local\Temp\4ed6463ee5bff60d1e2b9323e37f0510N.exe
"C:\Users\Admin\AppData\Local\Temp\4ed6463ee5bff60d1e2b9323e37f0510N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:388
- 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:328
- - 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:4060
- 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:5020
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1936

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2164

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
267KB

MD5
0c8e1fa7292943a69ca5fd2cde00d8fa

SHA1
2b899d9a9461e04b4beafb8884231ac0f2025efb

SHA256
36854c61803dfddc2cedfe658e47f719931bd848be5638a6f418b91b95d72488

SHA512
16262e5f63113c8e21727d38c1bb0ba0349a149b87d8ee047fe0cad7240dbbd84f9c583b31cb604c4c1337b62f5fc0b849fbf6df33b5a0bd43ca311ff57fa379

Download Submit
memory/328-30-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/328-26-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/328-24-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/388-3-0x00000000055B0000-0x0000000005642000-memory.dmp

Filesize
584KB

Download
memory/388-6-0x0000000005530000-0x000000000553A000-memory.dmp

Filesize
40KB

Download
memory/388-5-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/388-25-0x0000000075010000-0x00000000757C0000-memory.dmp

Filesize
7.7MB

Download
memory/388-4-0x0000000005540000-0x000000000554A000-memory.dmp

Filesize
40KB

Download
memory/388-0-0x000000007501E000-0x000000007501F000-memory.dmp

Filesize
4KB

Download
memory/388-2-0x0000000005B60000-0x0000000006104000-memory.dmp

Filesize
5.6MB

Download
memory/388-1-0x0000000000B00000-0x0000000000B46000-memory.dmp

Filesize
280KB

Download
memory/4060-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads