asyncrat | 9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c

General

Target

9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe
Size

266KB
MD5

fb84b1ee150e9cb0115c4751a749b8c1
SHA1

9cf720e82bc95cfae844597b3bb6f2798333e5ca
SHA256

9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c
SHA512

6ae10558a815a8c0c6cb26edd31c4ca43135d3f26cdc02d98e92c9c7b4b4cee9911bc32ec6a228e8d0c3d705637a5485a46b217b4b3f9803eddb46a3c4e222b6
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/v:WFzDqa86hV6uRRqX1evPlwAn

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/3912-28-0x0000000000400000-0x0000000000430000-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-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe

Executes dropped EXE 1 IoCs

pid	Process
2772	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-1-5-21-1750093773-264148664-1320403265-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2772 set thread context of 3912	2772	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.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
3672	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe
3912	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1608 wrote to memory of 2772	1608	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe	93
PID 1608 wrote to memory of 2772	1608	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe	93
PID 1608 wrote to memory of 2772	1608	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe	93
PID 1608 wrote to memory of 4348	1608	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe	94
PID 1608 wrote to memory of 4348	1608	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe	94
PID 1608 wrote to memory of 4348	1608	9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe	94
PID 4348 wrote to memory of 3672	4348	cmd.exe	97
PID 4348 wrote to memory of 3672	4348	cmd.exe	97
PID 4348 wrote to memory of 3672	4348	cmd.exe	97
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99
PID 2772 wrote to memory of 3912	2772	HiPatchService.exe	99

C:\Users\Admin\AppData\Local\Temp\9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe
"C:\Users\Admin\AppData\Local\Temp\9f8e77d169d89429ec407c149ed7bbd250a6e73d5f3cb2dfa763c25bc536e24c.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1608
- 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:2772
- - 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:3912
- 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:4348
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3672

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1788

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
6d7ad89570c7eeacf368c00f3585037b

SHA1
aa57b174288e82ab62b69f9b1d6db7e16511ceee

SHA256
db92e3bee4bee01802d5842b4316f209fc1da24570d6b942227f959262d0cbfb

SHA512
9f29228c857b7648fc67049e4299f5f690bb9865ce9081d5ea3d96cc321f04debb3f4241ad19b89e4d3a2727b984f4a1a03a47d6583f359744f47b0a00ba3a10

Download Submit
memory/1608-6-0x0000000005650000-0x000000000565A000-memory.dmp

Filesize
40KB

Download
memory/1608-3-0x00000000056B0000-0x0000000005742000-memory.dmp

Filesize
584KB

Download
memory/1608-4-0x0000000005660000-0x000000000566A000-memory.dmp

Filesize
40KB

Download
memory/1608-5-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/1608-0-0x0000000074BCE000-0x0000000074BCF000-memory.dmp

Filesize
4KB

Download
memory/1608-2-0x0000000005BC0000-0x0000000006164000-memory.dmp

Filesize
5.6MB

Download
memory/1608-25-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/1608-1-0x0000000000C10000-0x0000000000C56000-memory.dmp

Filesize
280KB

Download
memory/2772-24-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/2772-26-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/2772-30-0x0000000074BC0000-0x0000000075370000-memory.dmp

Filesize
7.7MB

Download
memory/3912-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads