asyncrat | 007e1e98c6244e90737a2e07c244445c81837997e7ab32b8c727e4b7b2b2a8b4

General

Target

8f1e1d2205deb1866c7c16246b65acc0N.exe
Size

267KB
MD5

8f1e1d2205deb1866c7c16246b65acc0
SHA1

a9c436b2aa3650734f2592c8c1ad02b21ea56ac3
SHA256

007e1e98c6244e90737a2e07c244445c81837997e7ab32b8c727e4b7b2b2a8b4
SHA512

5ea033d7c0fb67644bfc86144e721c3b8f13294501533289e1baedd81fd40c0791c0528855326ab28a15a37a505423cf13152980e1eb7953658afc77447c8012
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/H:WFzDqa86hV6uRRqX1evPlwAf

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/3060-36-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/3060-35-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/3060-34-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/3060-31-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral1/memory/3060-29-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Executes dropped EXE 1 IoCs

pid	Process
2684	HiPatchService.exe

Loads dropped DLL 1 IoCs

pid	Process
1072	8f1e1d2205deb1866c7c16246b65acc0N.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-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	8f1e1d2205deb1866c7c16246b65acc0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2684 set thread context of 3060	2684	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	8f1e1d2205deb1866c7c16246b65acc0N.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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe
3060	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2684	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	30
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 1072 wrote to memory of 2768	1072	8f1e1d2205deb1866c7c16246b65acc0N.exe	31
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33
PID 2684 wrote to memory of 3060	2684	HiPatchService.exe	33

C:\Users\Admin\AppData\Local\Temp\8f1e1d2205deb1866c7c16246b65acc0N.exe
"C:\Users\Admin\AppData\Local\Temp\8f1e1d2205deb1866c7c16246b65acc0N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1072
- 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:2684
- - 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:3060
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2768

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2092

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
41cd2b6c56ebda8fb6c2bf838eeecf01

SHA1
bc853166a2b54e4b9ac36310ba3d6b8baf8b9c34

SHA256
bef118fbaaabb403c5034149caac60a6e8c42878c35158ff6dc11a57d67b1b0e

SHA512
e2bb876c6e44191d650999e2a856fbebea05312eb239ef8772c5d2c273f16afcb392fdcda95ded6752196e0c9b1e59595dc6a46968c345ce1ac69532c691cbc1

Download Submit
memory/1072-23-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/1072-1-0x00000000012A0000-0x00000000012E6000-memory.dmp

Filesize
280KB

Download
memory/1072-2-0x00000000003E0000-0x00000000003EA000-memory.dmp

Filesize
40KB

Download
memory/1072-3-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/1072-0-0x000000007421E000-0x000000007421F000-memory.dmp

Filesize
4KB

Download
memory/2684-24-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/2684-21-0x0000000000F40000-0x0000000000F86000-memory.dmp

Filesize
280KB

Download
memory/2684-37-0x0000000074210000-0x00000000748FE000-memory.dmp

Filesize
6.9MB

Download
memory/3060-25-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3060-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3060-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3060-34-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3060-33-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3060-31-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3060-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3060-27-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads