asyncrat | e51eb91ddc758c9b2d1abef31a298307a462ab48d3a2d6bae58190c53085ba84

General

Target

a3436e7f17a93b12a60029992f728720N.exe
Size

267KB
MD5

a3436e7f17a93b12a60029992f728720
SHA1

52f184dcf5d04e7c7b5d9bab7ce1a90aab626d3b
SHA256

e51eb91ddc758c9b2d1abef31a298307a462ab48d3a2d6bae58190c53085ba84
SHA512

97950ace681672548c2cc410729d282c1b6ab2e2aa39f74dbfab62c723aab3dd7ad3baa11099b094e2b61d020554fcc710c1bbbb3de7c35fc75d359b3c4b9f4c
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/B:WFzDqa86hV6uRRqX1evPlwAJ

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/2668-31-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2668-34-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2668-29-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2668-36-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/2668-35-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Executes dropped EXE 1 IoCs

pid	Process
1292	HiPatchService.exe

Loads dropped DLL 1 IoCs

pid	Process
2988	a3436e7f17a93b12a60029992f728720N.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-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	a3436e7f17a93b12a60029992f728720N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1292 set thread context of 2668	1292	HiPatchService.exe	33

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 4 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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a3436e7f17a93b12a60029992f728720N.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe
2668	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 1292	2988	a3436e7f17a93b12a60029992f728720N.exe	30
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 2988 wrote to memory of 2280	2988	a3436e7f17a93b12a60029992f728720N.exe	31
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33
PID 1292 wrote to memory of 2668	1292	HiPatchService.exe	33

C:\Users\Admin\AppData\Local\Temp\a3436e7f17a93b12a60029992f728720N.exe
"C:\Users\Admin\AppData\Local\Temp\a3436e7f17a93b12a60029992f728720N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2988
- 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:1292
- - 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:2668
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2280

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2016

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

System Information Discovery

1

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
\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe

Filesize
267KB

MD5
ba06066e27d24d47ba2ca55dc230f049

SHA1
2b2a35e2b6ffd9cdbe9c2fc4596de410516bffd8

SHA256
cc376f43232c0ac8508d238c166ca18b1106a1498bc03e0faac9169e7da76b13

SHA512
efb16d172da48953d573902035f3111331358dce99649cc3f293c12f9c7f21581ea9a174524734eab16bc54ed0b91fcb00bc45a7ded3a27ef1c93c67dadaa479

Download Submit
memory/1292-37-0x0000000074B30000-0x000000007521E000-memory.dmp

Filesize
6.9MB

Download
memory/1292-21-0x0000000000D90000-0x0000000000DD6000-memory.dmp

Filesize
280KB

Download
memory/1292-22-0x0000000074B30000-0x000000007521E000-memory.dmp

Filesize
6.9MB

Download
memory/2668-33-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2668-25-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2668-31-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2668-34-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2668-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2668-27-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2668-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2668-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2988-3-0x0000000074B30000-0x000000007521E000-memory.dmp

Filesize
6.9MB

Download
memory/2988-2-0x0000000000420000-0x000000000042A000-memory.dmp

Filesize
40KB

Download
memory/2988-23-0x0000000074B30000-0x000000007521E000-memory.dmp

Filesize
6.9MB

Download
memory/2988-0-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

Filesize
4KB

Download
memory/2988-1-0x0000000000F20000-0x0000000000F66000-memory.dmp

Filesize
280KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads