asyncrat | 8e824dec1e3c6b378e05a6e9aa4b7b6e797020d07c149e5da31218f6abf907bc

General

Target

c242341ec919ff19dcd24e8dad99ade0N.exe
Size

267KB
MD5

c242341ec919ff19dcd24e8dad99ade0
SHA1

a0d03a83432578fac1dac5a5eea1247ab63b4de0
SHA256

8e824dec1e3c6b378e05a6e9aa4b7b6e797020d07c149e5da31218f6abf907bc
SHA512

1968aab4d8e1a21375629325c2da9b3d48f1d09c1193c793624e4788ff714684b3fc0d15d57efe2b00c84ab4bd0e6399d4340096f3d3e7a8bb1d6dfd40f610f5
SSDEEP

3072:WdvzDqxs8ORikgogWfiuRXd3YmSffdTKXNXANewGBvskX1pWA/s8Dm:WFzDqa86hV6uRRqX1evPlwAEQm

Score

10^/10

asyncrat 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/3392-28-0x0000000000400000-0x0000000000430000-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-1-5-21-3419463127-3903270268-2580331543-1000\Control Panel\International\Geo\Nation	c242341ec919ff19dcd24e8dad99ade0N.exe

Executes dropped EXE 1 IoCs

pid	Process
2984	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-1-5-21-3419463127-3903270268-2580331543-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\HiPatch = "C:\\Users\\Admin\\AppData\\Roaming\\HiPatch\\HiPatchService.exe"	c242341ec919ff19dcd24e8dad99ade0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2984 set thread context of 3392	2984	HiPatchService.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
2420	timeout.exe

Suspicious behavior: EnumeratesProcesses 26 IoCs

pid	Process
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe
3392	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 2984	2376	c242341ec919ff19dcd24e8dad99ade0N.exe	86
PID 2376 wrote to memory of 2984	2376	c242341ec919ff19dcd24e8dad99ade0N.exe	86
PID 2376 wrote to memory of 2984	2376	c242341ec919ff19dcd24e8dad99ade0N.exe	86
PID 2376 wrote to memory of 4600	2376	c242341ec919ff19dcd24e8dad99ade0N.exe	87
PID 2376 wrote to memory of 4600	2376	c242341ec919ff19dcd24e8dad99ade0N.exe	87
PID 2376 wrote to memory of 4600	2376	c242341ec919ff19dcd24e8dad99ade0N.exe	87
PID 4600 wrote to memory of 2420	4600	cmd.exe	89
PID 4600 wrote to memory of 2420	4600	cmd.exe	89
PID 4600 wrote to memory of 2420	4600	cmd.exe	89
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90
PID 2984 wrote to memory of 3392	2984	HiPatchService.exe	90

C:\Users\Admin\AppData\Local\Temp\c242341ec919ff19dcd24e8dad99ade0N.exe
"C:\Users\Admin\AppData\Local\Temp\c242341ec919ff19dcd24e8dad99ade0N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2376
- C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe
  "C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - Suspicious use of WriteProcessMemory
  PID:2984
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - Checks processor information in registry
    - Suspicious behavior: EnumeratesProcesses
    PID:3392
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\HiPatch\HiPatchService.bat""
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4600
- - C:\Windows\SysWOW64\timeout.exe
    timeout /t 180
    3⤵
    - Delays execution with timeout.exe
    PID:2420

C:\Windows\system32\wbem\WmiApSrv.exe
C:\Windows\system32\wbem\WmiApSrv.exe
1⤵
PID:4928

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

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
538322466cb00beb3e52b90edb562700

SHA1
bb15bae49e28ecc6975c4bc4ad5b2c23b210a5d6

SHA256
951933619bf1542b558afd44cd621fdd5cc6c183ce0f1dc9b5116a89c0bbe8ee

SHA512
38dc474f266c594b2dea64f1de1d4e70bada7bc161b946fd96d5e538f5903ad9f8e5b3e9b4184bb722ae585a60fa6f8f7e7eb4490b1254d9ba546a78b4a7051b

Download Submit
memory/2376-5-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/2376-3-0x0000000005420000-0x00000000054B2000-memory.dmp

Filesize
584KB

Download
memory/2376-4-0x00000000053E0000-0x00000000053EA000-memory.dmp

Filesize
40KB

Download
memory/2376-6-0x00000000053D0000-0x00000000053DA000-memory.dmp

Filesize
40KB

Download
memory/2376-0-0x000000007503E000-0x000000007503F000-memory.dmp

Filesize
4KB

Download
memory/2376-2-0x0000000005930000-0x0000000005ED4000-memory.dmp

Filesize
5.6MB

Download
memory/2376-24-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/2376-1-0x0000000000990000-0x00000000009D6000-memory.dmp

Filesize
280KB

Download
memory/2984-25-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/2984-27-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/2984-30-0x0000000075030000-0x00000000757E0000-memory.dmp

Filesize
7.7MB

Download
memory/3392-28-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads