asyncrat | e2d1f8e17561974c469215fdc3bc823ef0c3e73dc7408b2dbdab9965483a51e7

General

Target

569ab084e9eff9ae8176392b2a4ada70N.exe
Size

267KB
MD5

569ab084e9eff9ae8176392b2a4ada70
SHA1

9394b359ee5b5698c44a6a586e3d05e2e4e28697
SHA256

e2d1f8e17561974c469215fdc3bc823ef0c3e73dc7408b2dbdab9965483a51e7
SHA512

1d10d23c05af85078562480a66ff4f1920b302f9f1b12f56e7087d2b044b0b63977b786ea57a32c9c71684efefb751499775859651330072028f738dc0b90e09
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8Wv:WFzDqa86hV6uRRqX1evPlwAEr

Score

10^/10

asyncrat discovery persistence rat

Malware Config

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/1288-28-0x0000000000400000-0x0000000000430000-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-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation	569ab084e9eff9ae8176392b2a4ada70N.exe

Executes dropped EXE 1 IoCs

pid	Process
3692	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-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	569ab084e9eff9ae8176392b2a4ada70N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3692 set thread context of 1288	3692	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	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	569ab084e9eff9ae8176392b2a4ada70N.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

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

evasion

pid	Process
4728	timeout.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe
1288	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 4740 wrote to memory of 3692	4740	569ab084e9eff9ae8176392b2a4ada70N.exe	94
PID 4740 wrote to memory of 3692	4740	569ab084e9eff9ae8176392b2a4ada70N.exe	94
PID 4740 wrote to memory of 3692	4740	569ab084e9eff9ae8176392b2a4ada70N.exe	94
PID 4740 wrote to memory of 3244	4740	569ab084e9eff9ae8176392b2a4ada70N.exe	95
PID 4740 wrote to memory of 3244	4740	569ab084e9eff9ae8176392b2a4ada70N.exe	95
PID 4740 wrote to memory of 3244	4740	569ab084e9eff9ae8176392b2a4ada70N.exe	95
PID 3244 wrote to memory of 4728	3244	cmd.exe	97
PID 3244 wrote to memory of 4728	3244	cmd.exe	97
PID 3244 wrote to memory of 4728	3244	cmd.exe	97
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98
PID 3692 wrote to memory of 1288	3692	HiPatchService.exe	98

C:\Users\Admin\AppData\Local\Temp\569ab084e9eff9ae8176392b2a4ada70N.exe
"C:\Users\Admin\AppData\Local\Temp\569ab084e9eff9ae8176392b2a4ada70N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4740
- 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:3692
- - 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:1288
- 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:3244
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4728

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:944

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
fa280d029f4a6fdafe0075e4f01603e1

SHA1
79e979b6f0add70cee8b73d475733eb5ceade2cb

SHA256
402a2146690cf733e5e14707fc243c3e51b30381bfa711a03bfd59dd8df6672c

SHA512
a0a844c2a2a9552dce4ad408d1a45f4d312e4c245aaf3aa942d7a162258404e3951050254f0034770e5b38528c3b7bb097a79a7c27ccdeae2edfb02d63450dca

Download Submit
memory/1288-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/3692-30-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/3692-26-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/3692-24-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/4740-3-0x0000000004AE0000-0x0000000004B72000-memory.dmp

Filesize
584KB

Download
memory/4740-6-0x0000000004AC0000-0x0000000004ACA000-memory.dmp

Filesize
40KB

Download
memory/4740-25-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/4740-5-0x0000000004C70000-0x0000000004C7A000-memory.dmp

Filesize
40KB

Download
memory/4740-4-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/4740-0-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

Filesize
4KB

Download
memory/4740-2-0x0000000005090000-0x0000000005634000-memory.dmp

Filesize
5.6MB

Download
memory/4740-1-0x0000000000090000-0x00000000000D6000-memory.dmp

Filesize
280KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads