asyncrat | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Resubmissions

08/04/2025, 14:11

250408-rhjmcsvp15 10

22/03/2025, 06:18

250322-g2ywaay1fy 10

Analysis

max time kernel
146s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2025, 14:11

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General

Target

f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe
Size

273KB
MD5

3ef5f71fdec671a56a286ea1866bb640
SHA1

04e90d67cfb7cb470ea9e6d48f4fc765b0ddb472
SHA256

f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b
SHA512

5e724aef6ad8258cf23363911fb74780ff9b6cd469c0ba478d72de2d86b295ed63901e89a0a05466b2c9a7925244f6b02aef3ab9d06f325a1301eb3aedd431d2
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdT/u:WFzDqa86hV6uRRqX1evPlwAEdS

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
behavioral5/memory/2396-24-0x0000000000400000-0x0000000000430000-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-1-5-21-3218366390-1258052702-4267193707-1000\Control Panel\International\Geo\Nation	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe

Executes dropped EXE 2 IoCs

pid	Process
1224	HiPatchService.exe
2304	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-1-5-21-3218366390-1258052702-4267193707-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1224 set thread context of 2396	1224	HiPatchService.exe	103
PID 2304 set thread context of 1232	2304	HiPatchService.exe	105

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 7 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	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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe

Checks processor information in registry 2 TTPs 4 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
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
3096	timeout.exe

Suspicious behavior: EnumeratesProcesses 56 IoCs

pid	Process
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
2396	RegAsm.exe
1232	RegAsm.exe
2396	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
2396	RegAsm.exe
1232	RegAsm.exe
2396	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
1232	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe
2396	RegAsm.exe

Suspicious use of WriteProcessMemory 28 IoCs

description	pid	Process	procid_target
PID 1564 wrote to memory of 1224	1564	cmd.exe	95
PID 1564 wrote to memory of 1224	1564	cmd.exe	95
PID 1564 wrote to memory of 1224	1564	cmd.exe	95
PID 2172 wrote to memory of 2304	2172	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	99
PID 2172 wrote to memory of 2304	2172	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	99
PID 2172 wrote to memory of 2304	2172	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	99
PID 2172 wrote to memory of 3144	2172	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	100
PID 2172 wrote to memory of 3144	2172	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	100
PID 2172 wrote to memory of 3144	2172	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	100
PID 3144 wrote to memory of 3096	3144	cmd.exe	102
PID 3144 wrote to memory of 3096	3144	cmd.exe	102
PID 3144 wrote to memory of 3096	3144	cmd.exe	102
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 1224 wrote to memory of 2396	1224	HiPatchService.exe	103
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105
PID 2304 wrote to memory of 1232	2304	HiPatchService.exe	105

C:\Users\Admin\AppData\Local\Temp\f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe
"C:\Users\Admin\AppData\Local\Temp\f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2172
- 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:2304
- - 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:1232
- 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:3144
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3096

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:1564
- 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:1224
- - 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:2396

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4052

Network

MITRE ATT&CK Enterprise v16

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\HiPatchService.exe.log

Filesize
1KB

MD5
7ebe314bf617dc3e48b995a6c352740c

SHA1
538f643b7b30f9231a3035c448607f767527a870

SHA256
48178f884b8a4dd96e330b210b0530667d9473a7629fc6b4ad12b614bf438ee8

SHA512
0ba9d8f4244c15285e254d27b4bff7c49344ff845c48bc0bf0d8563072fab4d6f7a6abe6b6742e8375a08e9a3b3e5d5dc4937ab428dbe2dd8e62892fda04507e

Download Submit
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
ac4435f10231bca6780caccfa747cd45

SHA1
a8e95a96e039b36d85a0e716124477fd86984f44

SHA256
e4abcb3ecaac4d6aa4cdce97254fa89a2b43c83529b497e418d05ff7f99a577b

SHA512
a5fe8353a0bd10c2b68556d467011f5036a470cf3df3c8e953745a6aa0033b97a8910d76fdad5ff025ee263ac1dd2f05235e3bfb5d3dce60c26a83bb6cc2a9e2

Download Submit
memory/1224-26-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1224-14-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1224-13-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/2172-4-0x0000000004F80000-0x0000000004F8A000-memory.dmp

Filesize
40KB

Download
memory/2172-6-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/2172-5-0x0000000004F70000-0x0000000004F7A000-memory.dmp

Filesize
40KB

Download
memory/2172-0-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

Filesize
4KB

Download
memory/2172-15-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

Filesize
4KB

Download
memory/2172-16-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/2172-22-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/2172-3-0x0000000004EA0000-0x0000000004F32000-memory.dmp

Filesize
584KB

Download
memory/2172-2-0x0000000005520000-0x0000000005AC4000-memory.dmp

Filesize
5.6MB

Download
memory/2172-1-0x0000000000490000-0x00000000004D6000-memory.dmp

Filesize
280KB

Download
memory/2304-20-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/2304-29-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/2396-24-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download