asyncrat | 007e1e98c6244e90737a2e07c244445c81837997e7ab32b8c727e4b7b2b2a8b4

General

Target

8f1e1d2205deb1866c7c16246b65acc0N.exe
Size

267KB
MD5

8f1e1d2205deb1866c7c16246b65acc0
SHA1

a9c436b2aa3650734f2592c8c1ad02b21ea56ac3
SHA256

007e1e98c6244e90737a2e07c244445c81837997e7ab32b8c727e4b7b2b2a8b4
SHA512

5ea033d7c0fb67644bfc86144e721c3b8f13294501533289e1baedd81fd40c0791c0528855326ab28a15a37a505423cf13152980e1eb7953658afc77447c8012
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/H:WFzDqa86hV6uRRqX1evPlwAf

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/4744-28-0x0000000000400000-0x0000000000430000-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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	8f1e1d2205deb1866c7c16246b65acc0N.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	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-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	8f1e1d2205deb1866c7c16246b65acc0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4580 set thread context of 4744	4580	HiPatchService.exe	90

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	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
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8f1e1d2205deb1866c7c16246b65acc0N.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
4960	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe
4744	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3368 wrote to memory of 4580	3368	8f1e1d2205deb1866c7c16246b65acc0N.exe	86
PID 3368 wrote to memory of 4580	3368	8f1e1d2205deb1866c7c16246b65acc0N.exe	86
PID 3368 wrote to memory of 4580	3368	8f1e1d2205deb1866c7c16246b65acc0N.exe	86
PID 3368 wrote to memory of 512	3368	8f1e1d2205deb1866c7c16246b65acc0N.exe	87
PID 3368 wrote to memory of 512	3368	8f1e1d2205deb1866c7c16246b65acc0N.exe	87
PID 3368 wrote to memory of 512	3368	8f1e1d2205deb1866c7c16246b65acc0N.exe	87
PID 512 wrote to memory of 4960	512	cmd.exe	89
PID 512 wrote to memory of 4960	512	cmd.exe	89
PID 512 wrote to memory of 4960	512	cmd.exe	89
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90
PID 4580 wrote to memory of 4744	4580	HiPatchService.exe	90

C:\Users\Admin\AppData\Local\Temp\8f1e1d2205deb1866c7c16246b65acc0N.exe
"C:\Users\Admin\AppData\Local\Temp\8f1e1d2205deb1866c7c16246b65acc0N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3368
- 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:4580
- - 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:4744
- 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:512
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4960

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4568

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
107b5fd58dae14d61db5ab888a63d56d

SHA1
85f37f05b7494fdda00a0cdc1e96551147af1159

SHA256
e0e509248e7575a6279f89d52f3b462d4dab968fbbeab144f08bc20adf0f3949

SHA512
15307dedf3e42b579a2a890341a72c323f6bd4f5ecde56a8f7c44b84d39dc845ea981e03e95121734232e080e80104857904a20205a6578259a7658f8cb80010

Download Submit
memory/3368-6-0x0000000005500000-0x000000000550A000-memory.dmp

Filesize
40KB

Download
memory/3368-3-0x0000000005370000-0x0000000005402000-memory.dmp

Filesize
584KB

Download
memory/3368-4-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/3368-5-0x0000000005510000-0x000000000551A000-memory.dmp

Filesize
40KB

Download
memory/3368-0-0x0000000074EBE000-0x0000000074EBF000-memory.dmp

Filesize
4KB

Download
memory/3368-2-0x0000000005880000-0x0000000005E24000-memory.dmp

Filesize
5.6MB

Download
memory/3368-25-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/3368-1-0x0000000000920000-0x0000000000966000-memory.dmp

Filesize
280KB

Download
memory/4580-24-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/4580-27-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/4580-30-0x0000000074EB0000-0x0000000075660000-memory.dmp

Filesize
7.7MB

Download
memory/4744-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads