asyncrat | 030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394

Analysis

max time kernel
145s
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 11:53

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General

Target

030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe
Size

1.2MB
MD5

6cdd7805c45cd8fe70d7ed669060d53c
SHA1

b69a4c481256903eb5322ac18152fe4e586a1beb
SHA256

030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394
SHA512

7b2cd726428f3414b81e3c13906ddf064cbe2b8baa8e8988d33911f108c8c57a85e2c59f631835d1b9dd7038044d12abb0518df2d018519373f8f96bc28a5268
SSDEEP

24576:Sd+lICmcMAYl6S02mDnNYtIfJvdj6Mk1QA11j4RUIUl85:iCUwF1N9OJ7Ur

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-1-5-21-3171217504-1685128607-2237314850-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\FGNssSNG\\BGSRNSGFGns.exe\","	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4724 set thread context of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe
Token: SeDebugPrivilege	2252	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83
PID 4724 wrote to memory of 2252	4724	030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe	83

C:\Users\Admin\AppData\Local\Temp\030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe
"C:\Users\Admin\AppData\Local\Temp\030a4af9a4b4d893d16f71a3fa43c40d9ca96692a022a1b9913d05e5c1f38394.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4724
- 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:2252

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

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Downloads

memory/2252-12-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2252-18-0x0000000074F20000-0x00000000756D1000-memory.dmp

Filesize
7.7MB

Download
memory/2252-17-0x0000000074F20000-0x00000000756D1000-memory.dmp

Filesize
7.7MB

Download
memory/2252-16-0x0000000074F20000-0x00000000756D1000-memory.dmp

Filesize
7.7MB

Download
memory/2252-15-0x0000000074F20000-0x00000000756D1000-memory.dmp

Filesize
7.7MB

Download
memory/4724-8-0x0000000036060000-0x00000000360C6000-memory.dmp

Filesize
408KB

Download
memory/4724-6-0x00000000059F0000-0x0000000005A12000-memory.dmp

Filesize
136KB

Download
memory/4724-7-0x0000000005A20000-0x0000000005D77000-memory.dmp

Filesize
3.3MB

Download
memory/4724-0-0x0000000074F2E000-0x0000000074F2F000-memory.dmp

Filesize
4KB

Download
memory/4724-9-0x00000000364D0000-0x0000000036562000-memory.dmp

Filesize
584KB

Download
memory/4724-10-0x0000000036B20000-0x00000000370C6000-memory.dmp

Filesize
5.6MB

Download
memory/4724-5-0x00000000058F0000-0x0000000005982000-memory.dmp

Filesize
584KB

Download
memory/4724-14-0x0000000074F20000-0x00000000756D1000-memory.dmp

Filesize
7.7MB

Download
memory/4724-4-0x00000000058E0000-0x00000000058EA000-memory.dmp

Filesize
40KB

Download
memory/4724-3-0x00000000056C0000-0x00000000057AA000-memory.dmp

Filesize
936KB

Download
memory/4724-2-0x0000000074F20000-0x00000000756D1000-memory.dmp

Filesize
7.7MB

Download
memory/4724-1-0x0000000000A20000-0x0000000000B58000-memory.dmp

Filesize
1.2MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads