asyncrat | 5987d190c640cafc02bd5e0b7b023d7c793b25fc6af38ce7f541368683fc6b66

General

Target

document.ps1
Size

237KB
MD5

701750fca8e3b1a06e11c0e4971f7780
SHA1

d5be6d794bca204eb189dfc2f38b98ef0dce6302
SHA256

a20e52332a44c134f904d2ebcb779c46d397691ff5629812a6330774cad25b8d
SHA512

87241bbe70c41c86cefe02e9b980be5b7c8ec6037af8edd94ea9f6628f39aafa801aa1bf3c8d512b603bebea724d8dae5c15af3760a18e8f23ebff8c5b56afce
SSDEEP

3072:D2CD6RnNwZO2zD3N3AppqBMwIv1vZzd24Qzc:aCD6zGO2zD3N3Ap6Mg4Qzc

Score

10^/10

asyncrat bat discovery execution rat

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

BAT

C2

mrv00100.publicvm.com:6666

Mutex

AsyncMutex_mrv00

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
Asyncrat family
asyncrat

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3872 set thread context of 4872	3872	powershell.exe	87

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
3872	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	aspnet_compiler.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3872	powershell.exe
3872	powershell.exe
3872	powershell.exe
3872	powershell.exe
3872	powershell.exe
3872	powershell.exe
4872	aspnet_compiler.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3872	powershell.exe
Token: SeDebugPrivilege	4872	aspnet_compiler.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4872	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3872 wrote to memory of 1084	3872	powershell.exe	85
PID 3872 wrote to memory of 1084	3872	powershell.exe	85
PID 3872 wrote to memory of 1084	3872	powershell.exe	85
PID 3872 wrote to memory of 2296	3872	powershell.exe	86
PID 3872 wrote to memory of 2296	3872	powershell.exe	86
PID 3872 wrote to memory of 2296	3872	powershell.exe	86
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 4872	3872	powershell.exe	87
PID 3872 wrote to memory of 3812	3872	powershell.exe	88
PID 3872 wrote to memory of 3812	3872	powershell.exe	88

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\document.ps1
1⤵
- Suspicious use of SetThreadContext
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3872
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  PID:1084
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  PID:2296
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4872
- C:\Windows\system32\schtasks.exe
  "C:\Windows\system32\schtasks.exe" /delete /tn det /f
  2⤵
  PID:3812

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_n35v0lwm.dwp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3872-0-0x00007FFB80F43000-0x00007FFB80F45000-memory.dmp

Filesize
8KB

Download
memory/3872-1-0x0000019B25D90000-0x0000019B25DB2000-memory.dmp

Filesize
136KB

Download
memory/3872-11-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/3872-12-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/3872-13-0x0000019B25DC0000-0x0000019B25DD6000-memory.dmp

Filesize
88KB

Download
memory/3872-14-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/3872-19-0x00007FFB80F40000-0x00007FFB81A01000-memory.dmp

Filesize
10.8MB

Download
memory/4872-18-0x000000007530E000-0x000000007530F000-memory.dmp

Filesize
4KB

Download
memory/4872-15-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/4872-20-0x0000000075300000-0x0000000075AB0000-memory.dmp

Filesize
7.7MB

Download
memory/4872-21-0x00000000058C0000-0x0000000005E64000-memory.dmp

Filesize
5.6MB

Download
memory/4872-22-0x0000000005500000-0x0000000005592000-memory.dmp

Filesize
584KB

Download
memory/4872-23-0x00000000054F0000-0x00000000054FA000-memory.dmp

Filesize
40KB

Download
memory/4872-24-0x000000007530E000-0x000000007530F000-memory.dmp

Filesize
4KB

Download
memory/4872-25-0x0000000075300000-0x0000000075AB0000-memory.dmp

Filesize
7.7MB

Download

Analysis

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