asyncrat | 2029ad0bf4a39a9e0e880434117e8502eb04ed983fb1c1a8f5814f2fe3dad43f

General

Target

3724ea07a65c5ccdacd951990a435690N.exe
Size

267KB
MD5

3724ea07a65c5ccdacd951990a435690
SHA1

46dc11d1083894c282fd0ba7837a8ff68beadf22
SHA256

2029ad0bf4a39a9e0e880434117e8502eb04ed983fb1c1a8f5814f2fe3dad43f
SHA512

2a935625a483989c3b11b4edea15509ccde13503c6a0999e536824582a54ce05ff8c454ad6a61dc3a3364f5381273df82ac1152b4bad2c534e47a3cfe3b0c2e0
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/sXG:WFzDqa86hV6uRRqX1evPlwAEXG

Score

10^/10

asyncrat 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/4052-28-0x0000000000400000-0x0000000000430000-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-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	3724ea07a65c5ccdacd951990a435690N.exe

Executes dropped EXE 1 IoCs

pid	Process
1676	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-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	3724ea07a65c5ccdacd951990a435690N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1676 set thread context of 4052	1676	HiPatchService.exe	98

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

System Information Discovery
T1082

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
2604	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe
4052	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3804 wrote to memory of 1676	3804	3724ea07a65c5ccdacd951990a435690N.exe	92
PID 3804 wrote to memory of 1676	3804	3724ea07a65c5ccdacd951990a435690N.exe	92
PID 3804 wrote to memory of 1676	3804	3724ea07a65c5ccdacd951990a435690N.exe	92
PID 3804 wrote to memory of 4044	3804	3724ea07a65c5ccdacd951990a435690N.exe	93
PID 3804 wrote to memory of 4044	3804	3724ea07a65c5ccdacd951990a435690N.exe	93
PID 3804 wrote to memory of 4044	3804	3724ea07a65c5ccdacd951990a435690N.exe	93
PID 4044 wrote to memory of 2604	4044	cmd.exe	95
PID 4044 wrote to memory of 2604	4044	cmd.exe	95
PID 4044 wrote to memory of 2604	4044	cmd.exe	95
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98
PID 1676 wrote to memory of 4052	1676	HiPatchService.exe	98

C:\Users\Admin\AppData\Local\Temp\3724ea07a65c5ccdacd951990a435690N.exe
"C:\Users\Admin\AppData\Local\Temp\3724ea07a65c5ccdacd951990a435690N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3804
- C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
  "C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:1676
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:4052
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4044
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - Delays execution with timeout.exe
    PID:2604

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1492

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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
a2e48f61d589fc64d7a445ce48492208

SHA1
17591e660aa8b7419828e5932fe4e4090750b297

SHA256
9f34dc76b4069fef563bc87e7a0d1103b9b607e04827746741514615fc3a68cf

SHA512
07455daedce9d14d7272d6187dd9b68adb32fbc78a61412ffbbf9d5476b3b92f7e35579141472d3e5f65383cd0808e92ade3756f024ff20f261febaaa36a92aa

Download Submit
memory/1676-30-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/1676-26-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/1676-24-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3804-6-0x00000000055D0000-0x00000000055DA000-memory.dmp

Filesize
40KB

Download
memory/3804-0-0x0000000074C7E000-0x0000000074C7F000-memory.dmp

Filesize
4KB

Download
memory/3804-5-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3804-4-0x00000000055E0000-0x00000000055EA000-memory.dmp

Filesize
40KB

Download
memory/3804-25-0x0000000074C70000-0x0000000075420000-memory.dmp

Filesize
7.7MB

Download
memory/3804-3-0x0000000005520000-0x00000000055B2000-memory.dmp

Filesize
584KB

Download
memory/3804-2-0x0000000005C10000-0x00000000061B4000-memory.dmp

Filesize
5.6MB

Download
memory/3804-1-0x0000000000B00000-0x0000000000B46000-memory.dmp

Filesize
280KB

Download
memory/4052-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads