asyncrat | f3aa2b23a67f4dbcce9fff7bb084e70127e3e0c4f2ab0f605487c570a7408960

Analysis

max time kernel
148s
max time network
155s
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, 06:12

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General

Target

6faa2d85ae06f7888287bec8ae3e079b.exe
Size

273KB
MD5

6faa2d85ae06f7888287bec8ae3e079b
SHA1

ccc4103d8d5a042b5f4b99b82363444d3e7e3dc0
SHA256

7cb82f034c8469abb8eefc94fa1eb6b802a64489b4de6824dd21677b0113dd72
SHA512

99483fce6dad21ca189ed9dfe4631fc91145d199788fd6670c40acfb93220c109fff5cffd47b8074cf464f54931293ce4849134711e6a37f8ac5760dc5c9726c
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8sdTi:WFzDqa86hV6uRRqX1evPlwAEdm

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
behavioral28/memory/4492-29-0x0000000000400000-0x0000000000430000-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-1-5-21-3218366390-1258052702-4267193707-1000\Control Panel\International\Geo\Nation	6faa2d85ae06f7888287bec8ae3e079b.exe

Executes dropped EXE 1 IoCs

pid	Process
4836	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"	6faa2d85ae06f7888287bec8ae3e079b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4836 set thread context of 4492	4836	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	6faa2d85ae06f7888287bec8ae3e079b.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 value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	RegAsm.exe
Key opened	\Registry\Machine\HARDWARE\DESCRIPTION\System\CentralProcessor\0	RegAsm.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
2068	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe
4492	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 348 wrote to memory of 4836	348	6faa2d85ae06f7888287bec8ae3e079b.exe	93
PID 348 wrote to memory of 4836	348	6faa2d85ae06f7888287bec8ae3e079b.exe	93
PID 348 wrote to memory of 4836	348	6faa2d85ae06f7888287bec8ae3e079b.exe	93
PID 348 wrote to memory of 3744	348	6faa2d85ae06f7888287bec8ae3e079b.exe	94
PID 348 wrote to memory of 3744	348	6faa2d85ae06f7888287bec8ae3e079b.exe	94
PID 348 wrote to memory of 3744	348	6faa2d85ae06f7888287bec8ae3e079b.exe	94
PID 3744 wrote to memory of 2068	3744	cmd.exe	96
PID 3744 wrote to memory of 2068	3744	cmd.exe	96
PID 3744 wrote to memory of 2068	3744	cmd.exe	96
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99
PID 4836 wrote to memory of 4492	4836	HiPatchService.exe	99

C:\Users\Admin\AppData\Local\Temp\6faa2d85ae06f7888287bec8ae3e079b.exe
"C:\Users\Admin\AppData\Local\Temp\6faa2d85ae06f7888287bec8ae3e079b.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:348
- 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:4836
- - 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:4492
- 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:3744
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:2068

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:5088

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
5fe754e1333d480ad0b88aef9dff53cf

SHA1
db5b8cf2a5e82cff3145c64f54fa81c8bb101422

SHA256
c9e19e17ba1f9f856e035b6b44b09f8519ea7611e76dead893e1bd733c4febad

SHA512
5b1b778f808f93069cf48f19ec53b8af16e44e6a3c20701b89a3449ec1c7107749d0f82e61c2efbf24dd6fdc095170d16f2fd2a85bc3bcec4bd5abdb561cb77a

Download Submit
memory/348-6-0x0000000004B60000-0x0000000004B6A000-memory.dmp

Filesize
40KB

Download
memory/348-3-0x0000000004BE0000-0x0000000004C72000-memory.dmp

Filesize
584KB

Download
memory/348-4-0x0000000004B70000-0x0000000004B7A000-memory.dmp

Filesize
40KB

Download
memory/348-5-0x0000000074900000-0x00000000750B0000-memory.dmp

Filesize
7.7MB

Download
memory/348-0-0x000000007490E000-0x000000007490F000-memory.dmp

Filesize
4KB

Download
memory/348-12-0x000000007490E000-0x000000007490F000-memory.dmp

Filesize
4KB

Download
memory/348-2-0x00000000050F0000-0x0000000005694000-memory.dmp

Filesize
5.6MB

Download
memory/348-25-0x0000000074900000-0x00000000750B0000-memory.dmp

Filesize
7.7MB

Download
memory/348-1-0x0000000000130000-0x0000000000176000-memory.dmp

Filesize
280KB

Download
memory/4492-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4836-26-0x0000000074900000-0x00000000750B0000-memory.dmp

Filesize
7.7MB

Download
memory/4836-28-0x0000000074900000-0x00000000750B0000-memory.dmp

Filesize
7.7MB

Download
memory/4836-31-0x0000000074900000-0x00000000750B0000-memory.dmp

Filesize
7.7MB

Download