asyncrat | 19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190

Analysis

max time kernel
146s
max time network
149s
platform
windows11-21h2_x64
resource
win11-20240709-en
resource tags

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

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General

Target

19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe
Size

1.3MB
MD5

e60b4a9e303e2defab24d4566a58dddb
SHA1

07a47b7e033f4b890a1e0818d6bb947ad9e316a8
SHA256

19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190
SHA512

d4b8654a253263f0bf14ee594cad1904c8b4a6fe60b46c3e3585686f66be21c73982a26bd4dceb0da8699a9ae8f34a2a4aa299522003c961a0416d01eeb61008
SSDEEP

12288:B70JgEvMTUC/Nqg9t5l7w4VsTpPeViEXOOOOL0OOOOOOOMOvIX+OOOIbOl5OOOO0:QkTUQFtDEE+pGkWovdWXtQyMgw/kR5

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-1-5-21-514081398-208714212-3319599467-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\StreamGameVideo\\VPN.exe\","	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1944 set thread context of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe
1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe
Token: SeDebugPrivilege	4628	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82
PID 1944 wrote to memory of 4628	1944	19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe	82

C:\Users\Admin\AppData\Local\Temp\19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe
"C:\Users\Admin\AppData\Local\Temp\19244b433c67d8caf9e6653ea560c53b7f0b716007cae6b5e95e629c367ba190.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1944
- 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:4628

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/1944-6-0x0000000035C60000-0x0000000035CF2000-memory.dmp

Filesize
584KB

Download
memory/1944-0-0x0000000074E9E000-0x0000000074E9F000-memory.dmp

Filesize
4KB

Download
memory/1944-2-0x0000000004F60000-0x0000000004FD6000-memory.dmp

Filesize
472KB

Download
memory/1944-3-0x0000000074E90000-0x0000000075641000-memory.dmp

Filesize
7.7MB

Download
memory/1944-4-0x0000000004FE0000-0x000000000502C000-memory.dmp

Filesize
304KB

Download
memory/1944-5-0x0000000035550000-0x00000000355B6000-memory.dmp

Filesize
408KB

Download
memory/1944-1-0x0000000000370000-0x00000000004CC000-memory.dmp

Filesize
1.4MB

Download
memory/1944-7-0x00000000362B0000-0x0000000036856000-memory.dmp

Filesize
5.6MB

Download
memory/1944-11-0x0000000074E90000-0x0000000075641000-memory.dmp

Filesize
7.7MB

Download
memory/4628-12-0x0000000074E90000-0x0000000075641000-memory.dmp

Filesize
7.7MB

Download
memory/4628-9-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4628-13-0x0000000074E90000-0x0000000075641000-memory.dmp

Filesize
7.7MB

Download
memory/4628-14-0x0000000074E90000-0x0000000075641000-memory.dmp

Filesize
7.7MB

Download
memory/4628-15-0x0000000074E90000-0x0000000075641000-memory.dmp

Filesize
7.7MB

Download