asyncrat | e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc

Analysis

max time kernel
146s
max time network
151s
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

e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe
Size

1.3MB
MD5

4ecb15fe8939eacf799015f8419f407e
SHA1

06231d45f5a38c4fcef3ebf3d42b363c52cf23e3
SHA256

e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc
SHA512

da1e5edeaa85a71ec0097b28f8cf1a63aeea7b6864af647b9254e1bc50782fce0cb4e27f743cc4add43911cbd57852419047b2878cd440d0c51134fea158e9d7
SSDEEP

12288:mvNXAe2V/HjYmnkUytIS+5KTXF81q2rfuEI4b9YWFyZ:02VsofyuS+5Kp8FrflI4hty

Score

10^/10

asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Mutex

Aakn1515knAakn1515kn!

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-1-5-21-3666881604-935092360-1617577973-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\ViperFolder\\FipersVASV.exe\","	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3616 set thread context of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe
3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe
Token: SeDebugPrivilege	4212	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83
PID 3616 wrote to memory of 4212	3616	e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe	83

C:\Users\Admin\AppData\Local\Temp\e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe
"C:\Users\Admin\AppData\Local\Temp\e16bcff77a3468fa10bf4d67fb5e6c7d8d19564320895acdff5e1aaef74b5cfc.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3616
- 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:4212

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/3616-8-0x0000000006860000-0x00000000068AC000-memory.dmp

Filesize
304KB

Download
memory/3616-6-0x00000000057B0000-0x0000000005802000-memory.dmp

Filesize
328KB

Download
memory/3616-2-0x0000000005A10000-0x0000000005FB6000-memory.dmp

Filesize
5.6MB

Download
memory/3616-3-0x0000000005540000-0x00000000055D2000-memory.dmp

Filesize
584KB

Download
memory/3616-0-0x000000007478E000-0x000000007478F000-memory.dmp

Filesize
4KB

Download
memory/3616-4-0x0000000074780000-0x0000000074F31000-memory.dmp

Filesize
7.7MB

Download
memory/3616-1-0x0000000000930000-0x0000000000A7C000-memory.dmp

Filesize
1.3MB

Download
memory/3616-7-0x00000000067C0000-0x00000000067F0000-memory.dmp

Filesize
192KB

Download
memory/3616-5-0x0000000005520000-0x000000000552A000-memory.dmp

Filesize
40KB

Download
memory/3616-9-0x000000003A060000-0x000000003A0C6000-memory.dmp

Filesize
408KB

Download
memory/3616-13-0x0000000074780000-0x0000000074F31000-memory.dmp

Filesize
7.7MB

Download
memory/4212-14-0x0000000074780000-0x0000000074F31000-memory.dmp

Filesize
7.7MB

Download
memory/4212-11-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4212-15-0x0000000074780000-0x0000000074F31000-memory.dmp

Filesize
7.7MB

Download
memory/4212-16-0x0000000074780000-0x0000000074F31000-memory.dmp

Filesize
7.7MB

Download
memory/4212-17-0x0000000074780000-0x0000000074F31000-memory.dmp

Filesize
7.7MB

Download