asyncrat | 3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace

General

Target

3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe
Size

266KB
MD5

53e8b92110b8af5408967cd4ce4ce9ae
SHA1

2e6a97cc2b38d1e859feff86ec2259d13c76a6ca
SHA256

3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace
SHA512

dae5a8b7a444f2de6c196a8d4327957774c448f96dedc58768a9ca55a0fc1177c59259edc8c6ea1073ff582a4e48fc05cec5be80c21a04ef2c86fc95e7c015bf
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sH: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/1124-28-0x0000000000400000-0x0000000000430000-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-1-5-21-2990742725-2267136959-192470804-1000\Control Panel\International\Geo\Nation	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe

Executes dropped EXE 1 IoCs

pid	Process
4668	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-1-5-21-2990742725-2267136959-192470804-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4668 set thread context of 1124	4668	HiPatchService.exe	99

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	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe
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

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
2464	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe
1124	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4416 wrote to memory of 4668	4416	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe	93
PID 4416 wrote to memory of 4668	4416	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe	93
PID 4416 wrote to memory of 4668	4416	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe	93
PID 4416 wrote to memory of 3940	4416	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe	94
PID 4416 wrote to memory of 3940	4416	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe	94
PID 4416 wrote to memory of 3940	4416	3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe	94
PID 3940 wrote to memory of 2464	3940	cmd.exe	96
PID 3940 wrote to memory of 2464	3940	cmd.exe	96
PID 3940 wrote to memory of 2464	3940	cmd.exe	96
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99
PID 4668 wrote to memory of 1124	4668	HiPatchService.exe	99

C:\Users\Admin\AppData\Local\Temp\3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe
"C:\Users\Admin\AppData\Local\Temp\3878d445fcce175ce23a4680bc8a98cbb6298b115517116463af7399ca905ace.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4416
- 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:4668
- - 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:1124
- 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:3940
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2464

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:680

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
3436b81ad9b4f968194ffcc4d919068f

SHA1
dbf708661eff8370c6ff5d02ad89206c8ebdf1ef

SHA256
0511eda36bc562807cae1db35633ed2d0200e7d09751c29ba59a65a9d3e50b17

SHA512
9fd783208f83f4b48f8bd495599ae13b53669eef03e86f1f36e598aa60d6a676d2de50b356d8563fe20062b83b3f8b9a0e1b23b86e7d65e97c60ec71a1ef0110

Download Submit
memory/1124-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4416-4-0x0000000005500000-0x000000000550A000-memory.dmp

Filesize
40KB

Download
memory/4416-6-0x00000000054F0000-0x00000000054FA000-memory.dmp

Filesize
40KB

Download
memory/4416-5-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4416-0-0x0000000074B5E000-0x0000000074B5F000-memory.dmp

Filesize
4KB

Download
memory/4416-3-0x00000000052F0000-0x0000000005382000-memory.dmp

Filesize
584KB

Download
memory/4416-25-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4416-2-0x00000000059A0000-0x0000000005F44000-memory.dmp

Filesize
5.6MB

Download
memory/4416-1-0x0000000000A10000-0x0000000000A56000-memory.dmp

Filesize
280KB

Download
memory/4668-27-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4668-24-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download
memory/4668-30-0x0000000074B50000-0x0000000075300000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads