remcos | c18f07d962d9753b946c6aa1b3af535f55c3cdc15e55fa647546a4cfd09796ca

Analysis

max time kernel
148s
max time network
149s
platform
windows10_x64
resource
win10v20201028
submitted
28/12/2020, 07:56

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General

Target
Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
Size 1.1MB
Sample201228-e5svjtgt3a
SHA256 c18f07d962d9753b946c6aa1b3af535f55c3cdc15e55fa647546a4cfd09796ca
MD5 7e0cf5dc618d5b851c465b683184485d
SHA1 c3dc0ab54014b13bd00cdcdf93b46441ca25c83d
SHA512 61280ad02a0d19dee59b8082fb8ab1362cded538f4737d78d572cd203d547b113adbfae4cebe661667d45d8410fc874134f602dbec8b3e7bd034b184cdbb0610
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

databasepropersonombrecomercialideasearchwords.services:7680

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2156	PxxoServicesTrialNet.exe
1376	PxxoServicesTrialNet.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesTrialNet.exe\""	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	PxxoServicesTrialNet.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\MservicesOrg = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\PxxoServicesTrialNet.exe\""	PxxoServicesTrialNet.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4760 set thread context of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 2156 set thread context of 1376	2156	PxxoServicesTrialNet.exe	85

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000_Classes\Local Settings	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1376	PxxoServicesTrialNet.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4760 wrote to memory of 692	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	75
PID 4760 wrote to memory of 692	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	75
PID 4760 wrote to memory of 692	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	75
PID 4760 wrote to memory of 1172	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	76
PID 4760 wrote to memory of 1172	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	76
PID 4760 wrote to memory of 1172	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	76
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4760 wrote to memory of 4332	4760	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	77
PID 4332 wrote to memory of 3820	4332	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	78
PID 4332 wrote to memory of 3820	4332	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	78
PID 4332 wrote to memory of 3820	4332	Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe	78
PID 3820 wrote to memory of 1776	3820	WScript.exe	79
PID 3820 wrote to memory of 1776	3820	WScript.exe	79
PID 3820 wrote to memory of 1776	3820	WScript.exe	79
PID 1776 wrote to memory of 2156	1776	cmd.exe	81
PID 1776 wrote to memory of 2156	1776	cmd.exe	81
PID 1776 wrote to memory of 2156	1776	cmd.exe	81
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85
PID 2156 wrote to memory of 1376	2156	PxxoServicesTrialNet.exe	85

C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4760
- C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe"
  2⤵
  PID:692
- C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe"
  2⤵
  PID:1172
- C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe
  "C:\Users\Admin\AppData\Local\Temp\Factura Serfinanza_031796927323_096721_5976158998367620_326563_08900792964825324_20917639155821_pdf.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4332
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3820
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1776
    - - C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet.exe
        
        C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:2156
      - C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet.exe
        
        "C:\Users\Admin\AppData\Roaming\System32\PxxoServicesTrialNet.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:1376

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1376-26-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/2156-17-0x00000000732D0000-0x00000000739BE000-memory.dmp

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memory/4332-10-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/4332-8-0x0000000000400000-0x0000000000421000-memory.dmp

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memory/4760-2-0x00000000732D0000-0x00000000739BE000-memory.dmp

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memory/4760-7-0x00000000051B0000-0x00000000051B1000-memory.dmp

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memory/4760-6-0x0000000004950000-0x0000000004979000-memory.dmp

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memory/4760-5-0x00000000049B0000-0x00000000049B1000-memory.dmp

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memory/4760-3-0x00000000000C0000-0x00000000000C1000-memory.dmp

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