asyncrat | 94a21aa6a814e7648dd11f7ee355c768b10de67aee343d674648f7c963da113e

Analysis

max time kernel
123s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
08-01-2023 01:47

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General

Target

AsyncClient.exe
Size

47KB
MD5

c72dd7c3ff0500ce16dbb6ce2264584a
SHA1

497a000e2d327a7a673bfca3d37fb14bb04ede85
SHA256

94a21aa6a814e7648dd11f7ee355c768b10de67aee343d674648f7c963da113e
SHA512

7e2dc492ea99a97c29e511ff78ca8feb712d965e9abe4fc6418527c6d61cc12c4e8776ffaf5b44bc9fd5cf9e25886a39a9ad75c59a900ef64330da1ecd05e837
SSDEEP

768:Ou/6ZTgoiziWUUM9rmo2qrwLh/bj5Qp9PICMPaSc0bSVir+KlvYQXgdEMABDZQx:Ou/6ZTgle2J5CMy4bSVC++WWdQx

Score

10^/10

asyncrat default evasion rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

oxy01.duckdns.org:6606

oxy01.duckdns.org:7707

oxy01.duckdns.org:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	AsyncClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	AsyncClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	AsyncClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	AsyncClient.exe

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral1/memory/4644-132-0x0000000000170000-0x0000000000182000-memory.dmp	asyncrat

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	AsyncClient.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	AsyncClient.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4644 set thread context of 4168	4644	AsyncClient.exe	90

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000	taskmgr.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
856	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	856	taskmgr.exe
Token: SeSystemProfilePrivilege	856	taskmgr.exe
Token: SeCreateGlobalPrivilege	856	taskmgr.exe
Token: SeDebugPrivilege	4644	AsyncClient.exe
Token: SeDebugPrivilege	4644	AsyncClient.exe
Token: SeDebugPrivilege	1412	powershell.exe

Suspicious use of FindShellTrayWindow 64 IoCs

pid	Process
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe

Suspicious use of SendNotifyMessage 64 IoCs

pid	Process
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe
856	taskmgr.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 4168	4644	AsyncClient.exe	90
PID 4644 wrote to memory of 1412	4644	AsyncClient.exe	91
PID 4644 wrote to memory of 1412	4644	AsyncClient.exe	91
PID 4644 wrote to memory of 1412	4644	AsyncClient.exe	91

C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
"C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Windows security modification
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4644
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  PID:4168
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1412

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:856

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

Disabling Security Tools

T1089

Modify Registry

T1112

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1412-151-0x00000000072D0000-0x00000000072EA000-memory.dmp

Filesize
104KB

Download
memory/1412-149-0x0000000006570000-0x000000000658E000-memory.dmp

Filesize
120KB

Download
memory/1412-143-0x0000000005220000-0x0000000005848000-memory.dmp

Filesize
6.2MB

Download
memory/1412-155-0x0000000007610000-0x000000000762A000-memory.dmp

Filesize
104KB

Download
memory/1412-144-0x0000000005850000-0x0000000005872000-memory.dmp

Filesize
136KB

Download
memory/1412-153-0x0000000007550000-0x00000000075E6000-memory.dmp

Filesize
600KB

Download
memory/1412-152-0x0000000007340000-0x000000000734A000-memory.dmp

Filesize
40KB

Download
memory/1412-150-0x0000000007910000-0x0000000007F8A000-memory.dmp

Filesize
6.5MB

Download
memory/1412-142-0x00000000026E0000-0x0000000002716000-memory.dmp

Filesize
216KB

Download
memory/1412-156-0x00000000075F0000-0x00000000075F8000-memory.dmp

Filesize
32KB

Download
memory/1412-154-0x0000000007500000-0x000000000750E000-memory.dmp

Filesize
56KB

Download
memory/1412-147-0x0000000006590000-0x00000000065C2000-memory.dmp

Filesize
200KB

Download
memory/1412-146-0x0000000005FD0000-0x0000000005FEE000-memory.dmp

Filesize
120KB

Download
memory/1412-145-0x00000000059F0000-0x0000000005A56000-memory.dmp

Filesize
408KB

Download
memory/1412-148-0x000000006FFB0000-0x000000006FFFC000-memory.dmp

Filesize
304KB

Download
memory/4644-133-0x0000000004C30000-0x0000000004C96000-memory.dmp

Filesize
408KB

Download
memory/4644-140-0x0000000006A00000-0x0000000006A92000-memory.dmp

Filesize
584KB

Download
memory/4644-132-0x0000000000170000-0x0000000000182000-memory.dmp

Filesize
72KB

Download
memory/4644-137-0x0000000006830000-0x000000000684E000-memory.dmp

Filesize
120KB

Download
memory/4644-136-0x0000000006860000-0x00000000068D6000-memory.dmp

Filesize
472KB

Download
memory/4644-135-0x0000000005EF0000-0x0000000006494000-memory.dmp

Filesize
5.6MB

Download
memory/4644-134-0x0000000005080000-0x000000000511C000-memory.dmp

Filesize
624KB

Download