asyncrat | 7ddbec7fac00ec5624f45da5879ebfa97d95b21c7842cbaa1058daa46a47bd41

Analysis

max time kernel
148s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:16

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General

Target

c4c197e50214b25100e10fb00b2ac6e0.exe
Size

273KB
MD5

c4c197e50214b25100e10fb00b2ac6e0
SHA1

1dfac5794ccab5ec1e3c4897b8069c85e44bde19
SHA256

91b9c5ee1050b5ba75f7ad5e1daace80e64220fc71cb4cda0a2265b0559afa5f
SHA512

11d6fca3edc71affd5ae97743ae2e3a4ed8172f73e1f1a4d799baeb335a1f2a0219f652b2bc5d4d6a45144b936e047842579a50926813eacd9b9be1bfb8a2878
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdTk:WFzDqa86hV6uRRqX1evPlwAEdA

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.4.9G

corporation.warzonedns.com:9341

Mutex

480-28105c055659

Attributes

delay
0
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
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
behavioral20/memory/4920-29-0x0000000000400000-0x0000000000430000-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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	c4c197e50214b25100e10fb00b2ac6e0.exe

Executes dropped EXE 1 IoCs

pid	Process
2088	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-1-5-21-814918696-1585701690-3140955116-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	c4c197e50214b25100e10fb00b2ac6e0.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2088 set thread context of 4920	2088	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	c4c197e50214b25100e10fb00b2ac6e0.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

defense_evasion

pid	Process
1736	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe
4920	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 2088	3368	c4c197e50214b25100e10fb00b2ac6e0.exe	93
PID 3368 wrote to memory of 2088	3368	c4c197e50214b25100e10fb00b2ac6e0.exe	93
PID 3368 wrote to memory of 2088	3368	c4c197e50214b25100e10fb00b2ac6e0.exe	93
PID 3368 wrote to memory of 4908	3368	c4c197e50214b25100e10fb00b2ac6e0.exe	94
PID 3368 wrote to memory of 4908	3368	c4c197e50214b25100e10fb00b2ac6e0.exe	94
PID 3368 wrote to memory of 4908	3368	c4c197e50214b25100e10fb00b2ac6e0.exe	94
PID 4908 wrote to memory of 1736	4908	cmd.exe	96
PID 4908 wrote to memory of 1736	4908	cmd.exe	96
PID 4908 wrote to memory of 1736	4908	cmd.exe	96
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98
PID 2088 wrote to memory of 4920	2088	HiPatchService.exe	98

C:\Users\Admin\AppData\Local\Temp\c4c197e50214b25100e10fb00b2ac6e0.exe
"C:\Users\Admin\AppData\Local\Temp\c4c197e50214b25100e10fb00b2ac6e0.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3368
- 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:2088
- - 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:4920
- 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:4908
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1736

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:6136

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

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
273KB

MD5
6313f2c21b6437d21e27db3619e76e5d

SHA1
9e26490f168446773a5e5503d7e7d362bfb71207

SHA256
2c0e3b4ce670fff4912b0a3230b5a8aea1efe20e0e869f94de0265d2739b477d

SHA512
06b5c4cecc3b72d31ef8df807473e31c151c631e0990388a966b115b00253f89802e6be0fbded977511c478cee2744baa535bfce2fd5a67d64298cf894904889

Download Submit
memory/2088-31-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/2088-26-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/2088-28-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/3368-4-0x00000000052F0000-0x00000000052FA000-memory.dmp

Filesize
40KB

Download
memory/3368-0-0x0000000074BDE000-0x0000000074BDF000-memory.dmp

Filesize
4KB

Download
memory/3368-12-0x0000000074BDE000-0x0000000074BDF000-memory.dmp

Filesize
4KB

Download
memory/3368-6-0x00000000052E0000-0x00000000052EA000-memory.dmp

Filesize
40KB

Download
memory/3368-25-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/3368-5-0x0000000074BD0000-0x0000000075380000-memory.dmp

Filesize
7.7MB

Download
memory/3368-3-0x0000000005330000-0x00000000053C2000-memory.dmp

Filesize
584KB

Download
memory/3368-2-0x0000000005840000-0x0000000005DE4000-memory.dmp

Filesize
5.6MB

Download
memory/3368-1-0x00000000008B0000-0x00000000008F6000-memory.dmp

Filesize
280KB

Download
memory/4920-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download