asyncrat | f47794765c365e7724d229da871f381eb461bd084deba063a18c8ca58b994450

General

Target

0969e21e59f59df0800c57a7afdd7a50N.exe
Size

266KB
MD5

0969e21e59f59df0800c57a7afdd7a50
SHA1

d1cb11da5e5daaa764af3605dc93c7af27658c12
SHA256

f47794765c365e7724d229da871f381eb461bd084deba063a18c8ca58b994450
SHA512

c55aab17b4e8732fbb89027f0559c305d3ca574fea89c770b99fe6336bcc648ae2a38225adf649f0cd36811a86686bb1578241568dde7f30f4cb0d45e8905c5d
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/sT:WFzDqa86hV6uRRqX1evPlwAET

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/4116-28-0x0000000000400000-0x0000000000430000-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-1-5-21-1403246978-718555486-3105247137-1000\Control Panel\International\Geo\Nation	0969e21e59f59df0800c57a7afdd7a50N.exe

Executes dropped EXE 1 IoCs

pid	Process
4540	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-1-5-21-1403246978-718555486-3105247137-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	0969e21e59f59df0800c57a7afdd7a50N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4540 set thread context of 4116	4540	HiPatchService.exe	98

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	0969e21e59f59df0800c57a7afdd7a50N.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
1264	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe
4116	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2864 wrote to memory of 4540	2864	0969e21e59f59df0800c57a7afdd7a50N.exe	92
PID 2864 wrote to memory of 4540	2864	0969e21e59f59df0800c57a7afdd7a50N.exe	92
PID 2864 wrote to memory of 4540	2864	0969e21e59f59df0800c57a7afdd7a50N.exe	92
PID 2864 wrote to memory of 1052	2864	0969e21e59f59df0800c57a7afdd7a50N.exe	93
PID 2864 wrote to memory of 1052	2864	0969e21e59f59df0800c57a7afdd7a50N.exe	93
PID 2864 wrote to memory of 1052	2864	0969e21e59f59df0800c57a7afdd7a50N.exe	93
PID 1052 wrote to memory of 1264	1052	cmd.exe	95
PID 1052 wrote to memory of 1264	1052	cmd.exe	95
PID 1052 wrote to memory of 1264	1052	cmd.exe	95
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98
PID 4540 wrote to memory of 4116	4540	HiPatchService.exe	98

C:\Users\Admin\AppData\Local\Temp\0969e21e59f59df0800c57a7afdd7a50N.exe
"C:\Users\Admin\AppData\Local\Temp\0969e21e59f59df0800c57a7afdd7a50N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2864
- 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:4540
- - 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:4116
- 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:1052
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1264

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:2372

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
63bcd848070c19d9e4235505989418e2

SHA1
21d8b47bd9927a5bb10ca7426ef6e0d57ed46cc6

SHA256
30c7ac747274b8f64c373b1f49b01b870fa1abdd60ae684643057de1b8e4c442

SHA512
141afc580305605d789a23bbbb1f0f835b06a38dbbbdf8f92a0fdfe9d09e7046313934268344b29f536a3b4f9d736e3d5104e182b50e34f958b267297e5cae38

Download Submit
memory/2864-6-0x0000000005190000-0x000000000519A000-memory.dmp

Filesize
40KB

Download
memory/2864-3-0x00000000051C0000-0x0000000005252000-memory.dmp

Filesize
584KB

Download
memory/2864-4-0x00000000051A0000-0x00000000051AA000-memory.dmp

Filesize
40KB

Download
memory/2864-5-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/2864-0-0x0000000074F6E000-0x0000000074F6F000-memory.dmp

Filesize
4KB

Download
memory/2864-2-0x00000000056D0000-0x0000000005C74000-memory.dmp

Filesize
5.6MB

Download
memory/2864-24-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/2864-1-0x0000000000750000-0x0000000000796000-memory.dmp

Filesize
280KB

Download
memory/4116-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4540-25-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/4540-26-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download
memory/4540-30-0x0000000074F60000-0x0000000075710000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads