remcos | f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9

Analysis

max time kernel
149s
max time network
138s
platform
windows10_x64
resource
win10
submitted
24/06/2020, 15:06

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General

Target
f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
Size 1.1MB
Sample200624-b6wck217rx
SHA256 f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9
MD5 76e579360538c6cad507fe52af8cc67d
SHA1 b6c4dad955db9d41ca58d114b19214e4cace9c0d
SHA512 323ce50ee7ee78436422369a03b8d5a874393cc1f1c4204d5bb638c9a0a5444148e9aa78f114dc5ab2f8723c06a2aa916849581b75d2449ba74e58f257a26fce
MD5 SHA1 SHA512

Score

10^/10

rat remcos persistence

Malware Config

Extracted

Family

remcos

daya4659.ddns.net:8282

Signatures

Executes dropped EXE 8 IoCs

pid	Process
3948	remcos.exe
1784	remcos.exe
3692	sfc.exe
2896	sfc.exe
848	sfc.exe
1200	sfc.exe
2092	sfc.exe
2132	sfc.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe
4008	WerFault.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1784	remcos.exe

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

Adds Run entry to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
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-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	4008	WerFault.exe
Token: SeBackupPrivilege	4008	WerFault.exe
Token: SeDebugPrivilege	4008	WerFault.exe

Creates scheduled task(s) 1 TTPs 5 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
1468	schtasks.exe
2520	schtasks.exe
4044	schtasks.exe
2344	schtasks.exe
988	schtasks.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000_Classes\Local Settings	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe

Suspicious use of WriteProcessMemory 59 IoCs

description	pid	Process	procid_target
PID 2896 wrote to memory of 3508	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	67
PID 2896 wrote to memory of 3508	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	67
PID 2896 wrote to memory of 3508	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	67
PID 2896 wrote to memory of 3508	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	67
PID 2896 wrote to memory of 3508	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	67
PID 3508 wrote to memory of 3024	3508	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	68
PID 3508 wrote to memory of 3024	3508	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	68
PID 3508 wrote to memory of 3024	3508	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	68
PID 2896 wrote to memory of 4044	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	69
PID 2896 wrote to memory of 4044	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	69
PID 2896 wrote to memory of 4044	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	69
PID 3024 wrote to memory of 3888	3024	WScript.exe	71
PID 3024 wrote to memory of 3888	3024	WScript.exe	71
PID 3024 wrote to memory of 3888	3024	WScript.exe	71
PID 3888 wrote to memory of 3948	3888	cmd.exe	73
PID 3888 wrote to memory of 3948	3888	cmd.exe	73
PID 3888 wrote to memory of 3948	3888	cmd.exe	73
PID 3948 wrote to memory of 1784	3948	remcos.exe	74
PID 3948 wrote to memory of 1784	3948	remcos.exe	74
PID 3948 wrote to memory of 1784	3948	remcos.exe	74
PID 3948 wrote to memory of 1784	3948	remcos.exe	74
PID 3948 wrote to memory of 1784	3948	remcos.exe	74
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 1784 wrote to memory of 3368	1784	remcos.exe	75
PID 3948 wrote to memory of 2344	3948	remcos.exe	78
PID 3948 wrote to memory of 2344	3948	remcos.exe	78
PID 3948 wrote to memory of 2344	3948	remcos.exe	78
PID 3692 wrote to memory of 2896	3692	sfc.exe	81
PID 3692 wrote to memory of 2896	3692	sfc.exe	81
PID 3692 wrote to memory of 2896	3692	sfc.exe	81
PID 3692 wrote to memory of 2896	3692	sfc.exe	81
PID 3692 wrote to memory of 2896	3692	sfc.exe	81
PID 3692 wrote to memory of 988	3692	sfc.exe	82
PID 3692 wrote to memory of 988	3692	sfc.exe	82
PID 3692 wrote to memory of 988	3692	sfc.exe	82
PID 848 wrote to memory of 1200	848	sfc.exe	90
PID 848 wrote to memory of 1200	848	sfc.exe	90
PID 848 wrote to memory of 1200	848	sfc.exe	90
PID 848 wrote to memory of 1200	848	sfc.exe	90
PID 848 wrote to memory of 1200	848	sfc.exe	90
PID 848 wrote to memory of 1468	848	sfc.exe	91
PID 848 wrote to memory of 1468	848	sfc.exe	91
PID 848 wrote to memory of 1468	848	sfc.exe	91
PID 2092 wrote to memory of 2132	2092	sfc.exe	95
PID 2092 wrote to memory of 2132	2092	sfc.exe	95
PID 2092 wrote to memory of 2132	2092	sfc.exe	95
PID 2092 wrote to memory of 2132	2092	sfc.exe	95
PID 2092 wrote to memory of 2132	2092	sfc.exe	95
PID 2092 wrote to memory of 2520	2092	sfc.exe	96
PID 2092 wrote to memory of 2520	2092	sfc.exe	96
PID 2092 wrote to memory of 2520	2092	sfc.exe	96

Suspicious use of SetThreadContext 6 IoCs

description	pid	Process	procid_target
PID 2896 set thread context of 3508	2896	f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe	67
PID 3948 set thread context of 1784	3948	remcos.exe	74
PID 1784 set thread context of 3368	1784	remcos.exe	75
PID 3692 set thread context of 2896	3692	sfc.exe	81
PID 848 set thread context of 1200	848	sfc.exe	90
PID 2092 set thread context of 2132	2092	sfc.exe	95

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1784	remcos.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4008	3368	WerFault.exe	75

Suspicious use of NtCreateProcessExOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 4008 created 3368	4008	WerFault.exe	75

C:\Users\Admin\AppData\Local\Temp\f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
"C:\Users\Admin\AppData\Local\Temp\f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:2896
- C:\Users\Admin\AppData\Local\Temp\f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe
  "C:\Users\Admin\AppData\Local\Temp\f2c47d61c42f68039ed29f785a58d3aa3b97fdd8eefbc8be8557885fc1bfb7f9.exe"
  2⤵
  - Adds Run entry to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3508
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3024
  - - 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:3888
    - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of WriteProcessMemory
        Suspicious use of SetThreadContext
        
        PID:3948
      - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        6⤵
        Executes dropped EXE
        Suspicious behavior: GetForegroundWindowSpam
        Adds Run entry to start application
        Suspicious use of WriteProcessMemory
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        
        PID:1784
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:3368
        
        C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3368 -s 568
        8⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Program crash
        Suspicious use of NtCreateProcessExOtherParentProcess
        
        PID:4008
      - 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:2344
- 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:4044

C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:3692
- 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:988

C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:848
- C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
  "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
  2⤵
  - Executes dropped EXE
  PID:1200
- 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:1468

C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:2092
- C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe
  "C:\Users\Admin\AppData\Roaming\CapabilityAccessHandlers\sfc.exe"
  2⤵
  - Executes dropped EXE
  PID:2132
- 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:2520

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/1200-37-0x0000000000850000-0x0000000000870000-memory.dmp

Download

memory/3368-12-0x0000000000400000-0x0000000000526000-memory.dmp

Download

memory/3368-14-0x0000000000400000-0x0000000000526000-memory.dmp

Download

memory/3508-0-0x0000000000400000-0x0000000000420000-memory.dmp

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memory/4008-21-0x00000000052A0000-0x00000000052A1000-memory.dmp

Download

memory/4008-16-0x0000000004C70000-0x0000000004C71000-memory.dmp

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