asyncrat | 6f35ab9d6aed8b8df1754149da79be5cdadae7b5366e8f2be46d9370f7e920c0

Analysis

max time kernel
145s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-03-2024 19:04

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General

Target

Server_asnn.ps1
Size

200KB
MD5

5a46f618eb96097cf1ba0cef8d21b4f6
SHA1

32e8ef3358c42a9b8fec743e6db027e426153343
SHA256

eeadb25a0452957734ff500887bdd77ddfee0f925c58ed81b68ddc8677406315
SHA512

650aebf29c4ad32130ecdf6c7a8df59e90d08acbf346e1f76d55de9c97c798acc3c3d4e5032dcce32eac674d430c1e53372ef65d22a7aa84f8f1ec3618f93305
SSDEEP

3072:0n3FSCub20xXQ3ApL8X/g1o1vZvuAirbd:0n3td3ApMY1muAirbd

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

185.19.85.168:8888

Mutex

AsyncMutex_6SI8OkPnk

Attributes

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
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 3912 set thread context of 4880 3912 powershell.exe aspnet_compiler.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

3912 powershell.exe
3912 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 3912 powershell.exe

description	pid	process	target process
PID 3912 set thread context of 4880	3912	powershell.exe	aspnet_compiler.exe

pid	process
3912	powershell.exe
3912	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3912	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

powershell.exe

description	pid	process	target process
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe
PID 3912 wrote to memory of 4880	3912	powershell.exe	aspnet_compiler.exe

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\Server_asnn.ps1
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3912

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
2⤵
PID:4880

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_bqcovjq1.s3a.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3912-14-0x00000297EEAA0000-0x00000297EEAB6000-memory.dmp

Filesize
88KB

Download
memory/3912-10-0x00007FFDE30C0000-0x00007FFDE3B81000-memory.dmp

Filesize
10.8MB

Download
memory/3912-11-0x00000297EE9F0000-0x00000297EEA00000-memory.dmp

Filesize
64KB

Download
memory/3912-12-0x00000297EE9F0000-0x00000297EEA00000-memory.dmp

Filesize
64KB

Download
memory/3912-13-0x00000297EE9F0000-0x00000297EEA00000-memory.dmp

Filesize
64KB

Download
memory/3912-2-0x00000297EEA70000-0x00000297EEA92000-memory.dmp

Filesize
136KB

Download
memory/3912-18-0x00007FFDE30C0000-0x00007FFDE3B81000-memory.dmp

Filesize
10.8MB

Download
memory/4880-15-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4880-19-0x00000000753C0000-0x0000000075B70000-memory.dmp

Filesize
7.7MB

Download
memory/4880-20-0x0000000005300000-0x0000000005310000-memory.dmp

Filesize
64KB

Download
memory/4880-21-0x00000000753C0000-0x0000000075B70000-memory.dmp

Filesize
7.7MB

Download
memory/4880-22-0x0000000005300000-0x0000000005310000-memory.dmp

Filesize
64KB

Download