asyncrat | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Analysis

max time kernel
150s
max time network
122s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:18

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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 5 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral9/memory/2784-36-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral9/memory/2784-35-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral9/memory/2784-32-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral9/memory/2784-30-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def
behavioral9/memory/2784-37-0x0000000000400000-0x0000000000430000-memory.dmp	disable_win_def

Executes dropped EXE 1 IoCs

pid	Process
2244	HiPatchService.exe

Loads dropped DLL 1 IoCs

pid	Process
1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.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-1-5-21-3533259084-2542256011-65585152-1000\Software\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2244 set thread context of 2784	2244	HiPatchService.exe	34

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 4 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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	HiPatchService.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe
2784	RegAsm.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2244	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	31
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 1956 wrote to memory of 2540	1956	f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe	32
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34
PID 2244 wrote to memory of 2784	2244	HiPatchService.exe	34

C:\Users\Admin\AppData\Local\Temp\f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe
"C:\Users\Admin\AppData\Local\Temp\f628fa20e85aaf1cc562cfd512392d3d12da2ef70adc31068f1e3d7f2b0a4f3b.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1956
- 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:2244
- - 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
    - Suspicious behavior: EnumeratesProcesses
    PID:2784
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2540

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1968

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

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
46cfe3bc406d9abc5d562c7d0a927e08

SHA1
5832ef084f7f9927b60ec5c7ed78196c463bfc93

SHA256
a2e22c150ff9d8b7dfbd484585f0e9ef94461a979cd59b5e2fce4d39af890f85

SHA512
ec0a4227ea128f17a61d97753125a1288f1b12f3519199800a2d6b4bde1ea489d08a643f2eb294fe9aa0a5cc0f6bba035dd3d458a9de6c92eff0bf9692e85ba7

Download Submit
memory/1956-21-0x00000000740AE000-0x00000000740AF000-memory.dmp

Filesize
4KB

Download
memory/1956-1-0x00000000011F0000-0x0000000001236000-memory.dmp

Filesize
280KB

Download
memory/1956-2-0x00000000004B0000-0x00000000004BA000-memory.dmp

Filesize
40KB

Download
memory/1956-3-0x00000000740A0000-0x000000007478E000-memory.dmp

Filesize
6.9MB

Download
memory/1956-0-0x00000000740AE000-0x00000000740AF000-memory.dmp

Filesize
4KB

Download
memory/1956-25-0x00000000740A0000-0x000000007478E000-memory.dmp

Filesize
6.9MB

Download
memory/2244-22-0x0000000000320000-0x0000000000366000-memory.dmp

Filesize
280KB

Download
memory/2244-24-0x00000000740A0000-0x000000007478E000-memory.dmp

Filesize
6.9MB

Download
memory/2244-38-0x00000000740A0000-0x000000007478E000-memory.dmp

Filesize
6.9MB

Download
memory/2784-36-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2784-35-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2784-32-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2784-30-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2784-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2784-37-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/2784-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2784-26-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download