asyncrat | e57f5c12f0d16315a298851f3ae86ca19c0c56ea603ca3f7571415a88bc67b5d

General

Target

87944a5ef7ee2c0db8c81da51a2de900N.exe
Size

267KB
MD5

87944a5ef7ee2c0db8c81da51a2de900
SHA1

860ec7241cb7897d20b25df5d5da1042a67ecc44
SHA256

e57f5c12f0d16315a298851f3ae86ca19c0c56ea603ca3f7571415a88bc67b5d
SHA512

291ec1ffad87ddb35a9916b31c70ec0cf6260712ce28d33ac34ff73c1b7eb75aab2da55d37ac7c7cae00583b25d81f4a0764291f0692b7ca5b4ed06db3cd4c84
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/V:WFzDqa86hV6uRRqX1evPlwAt

Score

10^/10

asyncrat discovery persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.4.9G

C2

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

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
behavioral2/memory/4236-29-0x0000000000400000-0x0000000000430000-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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	87944a5ef7ee2c0db8c81da51a2de900N.exe

Executes dropped EXE 1 IoCs

pid	Process
4516	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-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	87944a5ef7ee2c0db8c81da51a2de900N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4516 set thread context of 4236	4516	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	87944a5ef7ee2c0db8c81da51a2de900N.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

evasion

pid	Process
4616	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe
4236	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4276 wrote to memory of 4516	4276	87944a5ef7ee2c0db8c81da51a2de900N.exe	93
PID 4276 wrote to memory of 4516	4276	87944a5ef7ee2c0db8c81da51a2de900N.exe	93
PID 4276 wrote to memory of 4516	4276	87944a5ef7ee2c0db8c81da51a2de900N.exe	93
PID 4276 wrote to memory of 1524	4276	87944a5ef7ee2c0db8c81da51a2de900N.exe	94
PID 4276 wrote to memory of 1524	4276	87944a5ef7ee2c0db8c81da51a2de900N.exe	94
PID 4276 wrote to memory of 1524	4276	87944a5ef7ee2c0db8c81da51a2de900N.exe	94
PID 1524 wrote to memory of 4616	1524	cmd.exe	96
PID 1524 wrote to memory of 4616	1524	cmd.exe	96
PID 1524 wrote to memory of 4616	1524	cmd.exe	96
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98
PID 4516 wrote to memory of 4236	4516	HiPatchService.exe	98

C:\Users\Admin\AppData\Local\Temp\87944a5ef7ee2c0db8c81da51a2de900N.exe
"C:\Users\Admin\AppData\Local\Temp\87944a5ef7ee2c0db8c81da51a2de900N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4276
- 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:4516
- - 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:4236
- 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:1524
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4616

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:1712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
267KB

MD5
97fc8d7f4b24de0af463447206bcb7e0

SHA1
250494d257809f8b2d3c264ea3d89c6b54546868

SHA256
811f1d8c92876e549f51a3a2a717b8d0989a6bda5580757c6ae8bfe3c3f3e1c0

SHA512
c8645cfa58435bd5dc2cac8269d82990510f793938d28233ee5232d25f5c78880431c7653968437b00ebfb4cdbe6088a03254c9779b9214d98477f74ebee4487

Download Submit
memory/4236-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/4276-6-0x0000000004BE0000-0x0000000004BEA000-memory.dmp

Filesize
40KB

Download
memory/4276-4-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/4276-5-0x0000000004BF0000-0x0000000004BFA000-memory.dmp

Filesize
40KB

Download
memory/4276-0-0x00000000751DE000-0x00000000751DF000-memory.dmp

Filesize
4KB

Download
memory/4276-10-0x00000000751DE000-0x00000000751DF000-memory.dmp

Filesize
4KB

Download
memory/4276-3-0x0000000004C40000-0x0000000004CD2000-memory.dmp

Filesize
584KB

Download
memory/4276-25-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/4276-2-0x0000000005330000-0x00000000058D4000-memory.dmp

Filesize
5.6MB

Download
memory/4276-1-0x00000000002E0000-0x0000000000326000-memory.dmp

Filesize
280KB

Download
memory/4516-26-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/4516-28-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download
memory/4516-31-0x00000000751D0000-0x0000000075980000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads