asyncrat | 3873c3bbf02f10de5e67b0da4c9002d4f936bae5aa287a83b078ae208e94f381

Analysis

max time kernel
202s
max time network
214s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2022 17:46

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

tmp.exe
Size

710KB
MD5

e403c2bbdd544797a9d702de09165779
SHA1

f47a7dd5095cca86ec026990a6ca66465139c1b1
SHA256

3873c3bbf02f10de5e67b0da4c9002d4f936bae5aa287a83b078ae208e94f381
SHA512

4a0a65ddaa920fb8e1cfc525cf9efc905d98376ee46f7d0b22ca1e477c20f1b33ed426b5ce225ad05839f90a8816bb7cc58ab0ed2a1effafb92e3c4354fee5b5
SSDEEP

6144:tbFfUhXQel80lOImzwFO/ChdqoQ+S8BZu+2MLjb2KPhZ8NjEmfQGX3bzhj9rUrmi:tFfSQel80MUFO/Chd1q8kehZOYmDb

Score

10^/10

asyncrat persistence rat

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-4246620582-653642754-1174164128-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe,\"C:\\Users\\Admin\\AppData\\Roaming\\Google\\Plugin1.exe\","	tmp.exe

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/4668-138-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Suspicious use of SetThreadContext 1 IoCs

Processes:

tmp.exe

description pid process target process

PID 1872 set thread context of 4668 1872 tmp.exe RegAsm.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

tmp.exe

pid process

1872 tmp.exe
1872 tmp.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

tmp.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 1872 tmp.exe
Token: SeDebugPrivilege 4668 RegAsm.exe

description	pid	process	target process
PID 1872 set thread context of 4668	1872	tmp.exe	RegAsm.exe

pid	process
1872	tmp.exe
1872	tmp.exe

description	pid	process
Token: SeDebugPrivilege	1872	tmp.exe
Token: SeDebugPrivilege	4668	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe
PID 1872 wrote to memory of 4668	1872	tmp.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Modifies WinLogon for persistence
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1872

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:4668

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1872-132-0x00000000000D0000-0x0000000000188000-memory.dmp

Filesize
736KB

Download
memory/1872-133-0x0000000004BA0000-0x0000000004BC2000-memory.dmp

Filesize
136KB

Download
memory/1872-134-0x0000000038DA0000-0x0000000038E06000-memory.dmp

Filesize
408KB

Download
memory/1872-135-0x0000000039640000-0x00000000396D2000-memory.dmp

Filesize
584KB

Download
memory/1872-136-0x0000000039C90000-0x000000003A234000-memory.dmp

Filesize
5.6MB

Download
memory/4668-137-0x0000000000000000-mapping.dmp

Download
memory/4668-138-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download