asyncrat | 7e71c79883eb025596762b4e0bf86b447039079dfe510ccf13a383b612575fa6

Analysis

max time kernel
149s
max time network
152s
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, 06:25

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General

Target

3e9a136b97b7ad7104019ae696b4f59d.exe
Size

273KB
MD5

3e9a136b97b7ad7104019ae696b4f59d
SHA1

99fff6e4e8320f9908ee359a3ed05549ef4d03a9
SHA256

ab3e7a2f39d9f97249371e3e0710bc1878410d19d8709fe5d9db437df1904a11
SHA512

8fab1f6ae6d36ddd4e92443064ac2473e5cc6a5db9cbf28d6446ecbc1836860bbc0afe78f7b49db3bd8dedb5b4043da49c996156107d2c2433ec999c37527ea4
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdT6:WFzDqa86hV6uRRqX1evPlwAEdO

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
behavioral32/memory/2272-30-0x0000000000400000-0x0000000000430000-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-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	3e9a136b97b7ad7104019ae696b4f59d.exe

Executes dropped EXE 1 IoCs

pid	Process
4976	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-1-5-21-3975168204-1612096350-4002976354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	3e9a136b97b7ad7104019ae696b4f59d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4976 set thread context of 2272	4976	HiPatchService.exe	97

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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	3e9a136b97b7ad7104019ae696b4f59d.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
5000	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe
2272	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 724 wrote to memory of 4976	724	3e9a136b97b7ad7104019ae696b4f59d.exe	92
PID 724 wrote to memory of 4976	724	3e9a136b97b7ad7104019ae696b4f59d.exe	92
PID 724 wrote to memory of 4976	724	3e9a136b97b7ad7104019ae696b4f59d.exe	92
PID 724 wrote to memory of 900	724	3e9a136b97b7ad7104019ae696b4f59d.exe	93
PID 724 wrote to memory of 900	724	3e9a136b97b7ad7104019ae696b4f59d.exe	93
PID 724 wrote to memory of 900	724	3e9a136b97b7ad7104019ae696b4f59d.exe	93
PID 900 wrote to memory of 5000	900	cmd.exe	95
PID 900 wrote to memory of 5000	900	cmd.exe	95
PID 900 wrote to memory of 5000	900	cmd.exe	95
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97
PID 4976 wrote to memory of 2272	4976	HiPatchService.exe	97

C:\Users\Admin\AppData\Local\Temp\3e9a136b97b7ad7104019ae696b4f59d.exe
"C:\Users\Admin\AppData\Local\Temp\3e9a136b97b7ad7104019ae696b4f59d.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:724
- 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:4976
- - 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:2272
- 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:900
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:5000

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:5236

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
2ea864186b1b30afa561f4cb97499e68

SHA1
0efc1351b785ff1c729681b4a87e24111bf4613c

SHA256
d6125f53b9ad4d3d40c88fbfd54a0c6d4b9169a4f55f58b169d64fbd6e2476e4

SHA512
c1d5c6ffd4ed7a0f6147cf8953472c8316db898403160155f5fa2994489262c4a036cd57bcab34ccfd092b97e2614da429b0a7480f6095ce6c18f488ce404594

Download Submit
memory/724-4-0x0000000074400000-0x0000000074BB0000-memory.dmp

Filesize
7.7MB

Download
memory/724-24-0x0000000074400000-0x0000000074BB0000-memory.dmp

Filesize
7.7MB

Download
memory/724-0-0x000000007440E000-0x000000007440F000-memory.dmp

Filesize
4KB

Download
memory/724-5-0x0000000005180000-0x000000000518A000-memory.dmp

Filesize
40KB

Download
memory/724-6-0x0000000005170000-0x000000000517A000-memory.dmp

Filesize
40KB

Download
memory/724-10-0x000000007440E000-0x000000007440F000-memory.dmp

Filesize
4KB

Download
memory/724-2-0x0000000005750000-0x0000000005CF4000-memory.dmp

Filesize
5.6MB

Download
memory/724-3-0x00000000051A0000-0x0000000005232000-memory.dmp

Filesize
584KB

Download
memory/724-1-0x0000000000740000-0x0000000000786000-memory.dmp

Filesize
280KB

Download
memory/724-27-0x0000000074400000-0x0000000074BB0000-memory.dmp

Filesize
7.7MB

Download
memory/2272-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4976-28-0x0000000074400000-0x0000000074BB0000-memory.dmp

Filesize
7.7MB

Download
memory/4976-26-0x0000000074400000-0x0000000074BB0000-memory.dmp

Filesize
7.7MB

Download
memory/4976-32-0x0000000074400000-0x0000000074BB0000-memory.dmp

Filesize
7.7MB

Download