remcos | 3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded

Analysis

max time kernel
150s
max time network
151s
platform
windows10_x64
resource
win10v20201028
submitted
10/11/2020, 11:28

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General

Target
3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe
Size 1.1MB
Sample201110-8r1ylfgnka
SHA256 3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded
MD5 17248e3040a7ce49619bb8f995cbc252
SHA1 39e21079725a6de63264db69897006d969281619
SHA512 3b2c7d9e87f22db854cfe7749eae2cac494b34b79831866a28ff044c9a2f0408092379136381d76094f28eea2148496cae4c58120750440299ee309f6d6eae26
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

daya4659.ddns.net:8282

Signatures

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

Executes dropped EXE 6 IoCs

pid	Process
684	remcos.exe
2060	remcos.exe
1864	sfc.exe
1836	sfc.exe
416	sfc.exe
2896	sfc.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 636 set thread context of 3452	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	75
PID 684 set thread context of 2060	684	remcos.exe	84
PID 1864 set thread context of 1836	1864	sfc.exe	90
PID 416 set thread context of 2896	416	sfc.exe	94

Creates scheduled task(s) 1 TTPs 4 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
3800	schtasks.exe
568	schtasks.exe
3872	schtasks.exe
4024	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2060	remcos.exe

Suspicious use of WriteProcessMemory 44 IoCs

description	pid	Process	procid_target
PID 636 wrote to memory of 3452	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	75
PID 636 wrote to memory of 3452	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	75
PID 636 wrote to memory of 3452	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	75
PID 636 wrote to memory of 3452	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	75
PID 636 wrote to memory of 3452	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	75
PID 636 wrote to memory of 568	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	76
PID 636 wrote to memory of 568	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	76
PID 636 wrote to memory of 568	636	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	76
PID 3452 wrote to memory of 412	3452	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	77
PID 3452 wrote to memory of 412	3452	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	77
PID 3452 wrote to memory of 412	3452	3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe	77
PID 412 wrote to memory of 2388	412	WScript.exe	79
PID 412 wrote to memory of 2388	412	WScript.exe	79
PID 412 wrote to memory of 2388	412	WScript.exe	79
PID 2388 wrote to memory of 684	2388	cmd.exe	81
PID 2388 wrote to memory of 684	2388	cmd.exe	81
PID 2388 wrote to memory of 684	2388	cmd.exe	81
PID 684 wrote to memory of 2060	684	remcos.exe	84
PID 684 wrote to memory of 2060	684	remcos.exe	84
PID 684 wrote to memory of 2060	684	remcos.exe	84
PID 684 wrote to memory of 2060	684	remcos.exe	84
PID 684 wrote to memory of 2060	684	remcos.exe	84
PID 2060 wrote to memory of 3744	2060	remcos.exe	85
PID 2060 wrote to memory of 3744	2060	remcos.exe	85
PID 2060 wrote to memory of 3744	2060	remcos.exe	85
PID 684 wrote to memory of 3872	684	remcos.exe	86
PID 684 wrote to memory of 3872	684	remcos.exe	86
PID 684 wrote to memory of 3872	684	remcos.exe	86
PID 1864 wrote to memory of 1836	1864	sfc.exe	90
PID 1864 wrote to memory of 1836	1864	sfc.exe	90
PID 1864 wrote to memory of 1836	1864	sfc.exe	90
PID 1864 wrote to memory of 1836	1864	sfc.exe	90
PID 1864 wrote to memory of 1836	1864	sfc.exe	90
PID 1864 wrote to memory of 4024	1864	sfc.exe	91
PID 1864 wrote to memory of 4024	1864	sfc.exe	91
PID 1864 wrote to memory of 4024	1864	sfc.exe	91
PID 416 wrote to memory of 2896	416	sfc.exe	94
PID 416 wrote to memory of 2896	416	sfc.exe	94
PID 416 wrote to memory of 2896	416	sfc.exe	94
PID 416 wrote to memory of 2896	416	sfc.exe	94
PID 416 wrote to memory of 2896	416	sfc.exe	94
PID 416 wrote to memory of 3800	416	sfc.exe	95
PID 416 wrote to memory of 3800	416	sfc.exe	95
PID 416 wrote to memory of 3800	416	sfc.exe	95

C:\Users\Admin\AppData\Local\Temp\3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe
"C:\Users\Admin\AppData\Local\Temp\3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:636
- C:\Users\Admin\AppData\Local\Temp\3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe
  "C:\Users\Admin\AppData\Local\Temp\3e8f952eabfa0b74dd92b86d52604ef90236014444dc444ce27f147f6bacfded.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3452
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:412
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2388
    - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious use of WriteProcessMemory
        
        PID:684
      - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2060
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:3744
      - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
        6⤵
        Creates scheduled task(s)
        
        PID:3872
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:568

C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1864
- C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
  "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
  2⤵
  - Executes dropped EXE
  PID:1836
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:4024

C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:416
- C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
  "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
  2⤵
  - Executes dropped EXE
  PID:2896
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn setx /tr "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe" /sc minute /mo 1 /F
  2⤵
  - Creates scheduled task(s)
  PID:3800

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3452-0-0x0000000000400000-0x0000000000420000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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