asyncrat | cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a

Analysis

max time kernel
147s
max time network
150s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

arch:x64arch:x86image:win11-20240709-enlocale:en-usos:windows11-21h2-x64system
submitted
13-07-2024 12:34

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General

Target

cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe
Size

607KB
MD5

04f81cd3a595c95b20c258a514118388
SHA1

30e11f854dfecbd170ac0c5286ed75ffa1f48d86
SHA256

cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a
SHA512

a769a8b2a26f3dfee0b86522c0c8cd5bf8180deae4d462f7e5a08600e447b27208729f459ba391519ece95d72daf2e33a8563088dd836422a9596d7634076d22
SSDEEP

6144:l/Yprz9pQLYJy6BzahC3Ic2TD2mo9txBPRLF:1mH9EYA6RJ4c2nkxp

Score

10^/10

asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Mutex

AsyncMutex_6SI8OkPnk

Attributes

c2_url_file
http://update-checker-status.cc/OCB-Async.txt
delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3171217504-1685128607-2237314850-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\ViperFolder\\FiperN.exe\","	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1868 set thread context of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe
1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe
Token: SeDebugPrivilege	5092	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83
PID 1868 wrote to memory of 5092	1868	cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe	83

C:\Users\Admin\AppData\Local\Temp\cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe
"C:\Users\Admin\AppData\Local\Temp\cdfb3a8ed030bb040835d4e2d5fd150bff61006971ce84809183127fd758639a.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:5092

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1868-6-0x0000000037800000-0x0000000037866000-memory.dmp

Filesize
408KB

Download
memory/1868-8-0x00000000386A0000-0x0000000038C46000-memory.dmp

Filesize
5.6MB

Download
memory/1868-2-0x0000000005600000-0x0000000005652000-memory.dmp

Filesize
328KB

Download
memory/1868-3-0x0000000074340000-0x0000000074AF1000-memory.dmp

Filesize
7.7MB

Download
memory/1868-4-0x0000000005670000-0x00000000056A0000-memory.dmp

Filesize
192KB

Download
memory/1868-5-0x0000000005760000-0x00000000057AC000-memory.dmp

Filesize
304KB

Download
memory/1868-1-0x0000000000B90000-0x0000000000C2E000-memory.dmp

Filesize
632KB

Download
memory/1868-7-0x0000000038050000-0x00000000380E2000-memory.dmp

Filesize
584KB

Download
memory/1868-0-0x000000007434E000-0x000000007434F000-memory.dmp

Filesize
4KB

Download
memory/1868-12-0x0000000074340000-0x0000000074AF1000-memory.dmp

Filesize
7.7MB

Download
memory/5092-10-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/5092-13-0x0000000074340000-0x0000000074AF1000-memory.dmp

Filesize
7.7MB

Download
memory/5092-14-0x0000000074340000-0x0000000074AF1000-memory.dmp

Filesize
7.7MB

Download
memory/5092-15-0x0000000074340000-0x0000000074AF1000-memory.dmp

Filesize
7.7MB

Download
memory/5092-16-0x0000000074340000-0x0000000074AF1000-memory.dmp

Filesize
7.7MB

Download