remcos | 8d087e56deb745a40c704cd0a508f9f07b697b3ff44ae660ee581f7f42e4e160

Analysis

max time kernel
150s
max time network
149s
platform
windows10_x64
resource
win10v20201028
submitted
15/02/2021, 19:48

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General

Target
New Order.exe
Size 813KB
Sample210215-6ftyee3yaj
SHA256 8d087e56deb745a40c704cd0a508f9f07b697b3ff44ae660ee581f7f42e4e160
MD5 dec90801aac280bb0cf01fab56f30bf3
SHA1 c8cac95cbc28dd1303dc73eab11d9c3bca4cf6c3
SHA512 038f0e1951aee45fd2b6a2b0b72ffc8661676a11cc9ff695709f4a2e666f5881e6d9193af53dc4fdace493cdee50ae3e0753d74d4519061afad1837565fbb769
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
3564	remcos.exe
204	remcos.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\	New Order.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	New Order.exe
Key created	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3341490333-719741536-2920803124-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 1176 set thread context of 3492	1176	New Order.exe	81
PID 3564 set thread context of 204	3564	remcos.exe	86
PID 204 set thread context of 2388	204	remcos.exe	87

Modifies registry class 1 IoCs

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

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1176	New Order.exe
1176	New Order.exe
1176	New Order.exe
1176	New Order.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
204	remcos.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1176	New Order.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
204	remcos.exe

Suspicious use of WriteProcessMemory 47 IoCs

description	pid	Process	procid_target
PID 1176 wrote to memory of 3220	1176	New Order.exe	79
PID 1176 wrote to memory of 3220	1176	New Order.exe	79
PID 1176 wrote to memory of 3220	1176	New Order.exe	79
PID 1176 wrote to memory of 3696	1176	New Order.exe	80
PID 1176 wrote to memory of 3696	1176	New Order.exe	80
PID 1176 wrote to memory of 3696	1176	New Order.exe	80
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 1176 wrote to memory of 3492	1176	New Order.exe	81
PID 3492 wrote to memory of 1408	3492	New Order.exe	82
PID 3492 wrote to memory of 1408	3492	New Order.exe	82
PID 3492 wrote to memory of 1408	3492	New Order.exe	82
PID 1408 wrote to memory of 3800	1408	WScript.exe	83
PID 1408 wrote to memory of 3800	1408	WScript.exe	83
PID 1408 wrote to memory of 3800	1408	WScript.exe	83
PID 3800 wrote to memory of 3564	3800	cmd.exe	85
PID 3800 wrote to memory of 3564	3800	cmd.exe	85
PID 3800 wrote to memory of 3564	3800	cmd.exe	85
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 3564 wrote to memory of 204	3564	remcos.exe	86
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87
PID 204 wrote to memory of 2388	204	remcos.exe	87

C:\Users\Admin\AppData\Local\Temp\New Order.exe
"C:\Users\Admin\AppData\Local\Temp\New Order.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1176
- C:\Users\Admin\AppData\Local\Temp\New Order.exe
  "{path}"
  2⤵
  PID:3220
- C:\Users\Admin\AppData\Local\Temp\New Order.exe
  "{path}"
  2⤵
  PID:3696
- C:\Users\Admin\AppData\Local\Temp\New Order.exe
  "{path}"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3492
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1408
  - - 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:3800
    - - 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:3564
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        "{path}"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetThreadContext
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:204
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:2388

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

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/204-36-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/1176-9-0x0000000004DF0000-0x0000000004DF2000-memory.dmp

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memory/1176-11-0x00000000070C0000-0x000000000718D000-memory.dmp

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memory/1176-6-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

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memory/1176-5-0x00000000051C0000-0x00000000051C1000-memory.dmp

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memory/1176-2-0x0000000073A80000-0x000000007416E000-memory.dmp

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memory/1176-3-0x0000000000150000-0x0000000000151000-memory.dmp

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memory/1176-10-0x0000000004E20000-0x0000000004E21000-memory.dmp

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memory/1176-8-0x0000000007020000-0x0000000007021000-memory.dmp

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memory/1176-7-0x0000000004B90000-0x0000000004B91000-memory.dmp

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memory/2388-34-0x0000000000400000-0x00000000004D2000-memory.dmp

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memory/3492-16-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/3492-12-0x0000000000400000-0x0000000000478000-memory.dmp

Download

memory/3564-29-0x00000000057C0000-0x00000000057C1000-memory.dmp

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memory/3564-21-0x0000000073A80000-0x000000007416E000-memory.dmp

Download