asyncrat | b063352ee62460586b4189c505b8d40d1a9aa57ce0eb8d561d760593f621864d

General

Target

f451a02acc3dc89a0b3091a19404b150N.exe
Size

267KB
MD5

f451a02acc3dc89a0b3091a19404b150
SHA1

c6c81d728e584dcc806cb3ee36fba90d8cd300fb
SHA256

b063352ee62460586b4189c505b8d40d1a9aa57ce0eb8d561d760593f621864d
SHA512

2f1bff6e366371c2a7a1b4214a25cbb396263cbf28f6042e55a9f916d18883cbd31f671985dad3934327925935ab3bb6458975b0b2e3ec30d0f7787e8873bed4
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/d:WFzDqa86hV6uRRqX1evPlwAF

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/4012-29-0x0000000000400000-0x0000000000430000-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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	f451a02acc3dc89a0b3091a19404b150N.exe

Executes dropped EXE 1 IoCs

pid	Process
1936	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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	f451a02acc3dc89a0b3091a19404b150N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1936 set thread context of 4012	1936	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	f451a02acc3dc89a0b3091a19404b150N.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
1868	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe
4012	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2648 wrote to memory of 1936	2648	f451a02acc3dc89a0b3091a19404b150N.exe	91
PID 2648 wrote to memory of 1936	2648	f451a02acc3dc89a0b3091a19404b150N.exe	91
PID 2648 wrote to memory of 1936	2648	f451a02acc3dc89a0b3091a19404b150N.exe	91
PID 2648 wrote to memory of 4560	2648	f451a02acc3dc89a0b3091a19404b150N.exe	92
PID 2648 wrote to memory of 4560	2648	f451a02acc3dc89a0b3091a19404b150N.exe	92
PID 2648 wrote to memory of 4560	2648	f451a02acc3dc89a0b3091a19404b150N.exe	92
PID 4560 wrote to memory of 1868	4560	cmd.exe	94
PID 4560 wrote to memory of 1868	4560	cmd.exe	94
PID 4560 wrote to memory of 1868	4560	cmd.exe	94
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97
PID 1936 wrote to memory of 4012	1936	HiPatchService.exe	97

C:\Users\Admin\AppData\Local\Temp\f451a02acc3dc89a0b3091a19404b150N.exe
"C:\Users\Admin\AppData\Local\Temp\f451a02acc3dc89a0b3091a19404b150N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2648
- 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:1936
- - 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:4012
- 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:4560
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:1868

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4716

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
f0462cc76fb1b19e045b48e0f2aba7d1

SHA1
38ef986cccd223e66c592e1649cb5b782ececb74

SHA256
e0cfda6ca9a752628bbf4deddf02d207eec16a51b3f2d73757257a8091a1b793

SHA512
f32735f4932a213e9f862bcfccb90956c8cc83153ade37a3441ffb3c74625dc62b34822c659e93c7cda7007d525f9c79633ce663e3c708f9156b8bf60ef885ea

Download Submit
memory/1936-31-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/1936-28-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/1936-26-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/2648-6-0x0000000004F40000-0x0000000004F4A000-memory.dmp

Filesize
40KB

Download
memory/2648-0-0x0000000074FDE000-0x0000000074FDF000-memory.dmp

Filesize
4KB

Download
memory/2648-10-0x0000000074FDE000-0x0000000074FDF000-memory.dmp

Filesize
4KB

Download
memory/2648-4-0x0000000004FF0000-0x0000000004FFA000-memory.dmp

Filesize
40KB

Download
memory/2648-25-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/2648-5-0x0000000074FD0000-0x0000000075780000-memory.dmp

Filesize
7.7MB

Download
memory/2648-3-0x0000000004F50000-0x0000000004FE2000-memory.dmp

Filesize
584KB

Download
memory/2648-2-0x00000000055F0000-0x0000000005B94000-memory.dmp

Filesize
5.6MB

Download
memory/2648-1-0x0000000000520000-0x0000000000566000-memory.dmp

Filesize
280KB

Download
memory/4012-29-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads