asyncrat | 344c7da93f656041139c2025a960539db8916f2ab80dc780ef6eefab359fed04

Analysis

max time kernel
141s
max time network
141s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
12-08-2024 16:17

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General

Target

stub.ps1
Size

2KB
MD5

b4ce78d3ce06757ceac96f41e3d063b6
SHA1

8be4093f5effe6df2734b5db044fec34bddaa2fb
SHA256

344c7da93f656041139c2025a960539db8916f2ab80dc780ef6eefab359fed04
SHA512

6933c30575451de6b36d38befe85a4e5fb6612073a1a16605f43b6a9bcad6e1a5cabd113a59950e3bf93c427edef1c7139cec2665ad9cecb9fe660b5a8b5c757

Score

10^/10

asyncrat default discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

185.169.54.165:7331

Mutex

DcRatMutex_qwqdanchun

Attributes

delay
1
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Blocklisted process makes network request 1 IoCs

flow	pid	Process
5	2736	powershell.exe

Downloads MZ/PE file

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2736 set thread context of 1588	2736	powershell.exe	88

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
2736	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2736	powershell.exe
2736	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	1588	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88
PID 2736 wrote to memory of 1588	2736	powershell.exe	88

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\stub.ps1
1⤵
- Blocklisted process makes network request
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2736
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  PID:1588

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cvuksrox.ya4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1588-20-0x000000007483E000-0x000000007483F000-memory.dmp

Filesize
4KB

Download
memory/1588-28-0x0000000074830000-0x0000000074FE0000-memory.dmp

Filesize
7.7MB

Download
memory/1588-27-0x000000007483E000-0x000000007483F000-memory.dmp

Filesize
4KB

Download
memory/1588-26-0x0000000005CF0000-0x0000000005D56000-memory.dmp

Filesize
408KB

Download
memory/1588-25-0x0000000006230000-0x00000000067D4000-memory.dmp

Filesize
5.6MB

Download
memory/1588-24-0x0000000005BE0000-0x0000000005C7C000-memory.dmp

Filesize
624KB

Download
memory/1588-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/1588-21-0x0000000074830000-0x0000000074FE0000-memory.dmp

Filesize
7.7MB

Download
memory/2736-12-0x00007FFCCA6B0000-0x00007FFCCB171000-memory.dmp

Filesize
10.8MB

Download
memory/2736-19-0x00007FFCCA6B0000-0x00007FFCCB171000-memory.dmp

Filesize
10.8MB

Download
memory/2736-18-0x000001FD759D0000-0x000001FD75BEC000-memory.dmp

Filesize
2.1MB

Download
memory/2736-14-0x000001FD5D5F0000-0x000001FD5D5F6000-memory.dmp

Filesize
24KB

Download
memory/2736-13-0x000001FD5D620000-0x000001FD5D660000-memory.dmp

Filesize
256KB

Download
memory/2736-0-0x00007FFCCA6B3000-0x00007FFCCA6B5000-memory.dmp

Filesize
8KB

Download
memory/2736-11-0x00007FFCCA6B0000-0x00007FFCCB171000-memory.dmp

Filesize
10.8MB

Download
memory/2736-10-0x000001FD5D5B0000-0x000001FD5D5D2000-memory.dmp

Filesize
136KB

Download