remcos | 57294ac308436e17b7e99da25f3d0fa1eb0a466572bed8ee736e078d0dc8042f

General

Target

Shipment Document BL,INV and packing list.jpg.exe
Size

659KB
MD5

fe59b9e260519d6227ff7e239c9d0a04
SHA1

577f9d0d5fd671a83caad0cfe241fbf724d372fc
SHA256

57294ac308436e17b7e99da25f3d0fa1eb0a466572bed8ee736e078d0dc8042f
SHA512

30f90794a594bb0f68f04089f4f367d7251e24c25d073386eb6f2df7d847d558ea859d4404632d069041ac0157952db95f13e064fef5f3a968dd227a341eea59

Score

10^/10

rat remcos persistence

Malware Config

Extracted

Family

remcos

C2

hussanm.duckdns.org:7652

Signatures

Executes dropped EXE 2 IoCs

pid	Process
3772	remcos.exe
4056	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4056	remcos.exe

Adds Run entry 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-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Shipment Document BL,INV and packing list.jpg.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\""	Shipment Document BL,INV and packing list.jpg.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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
3568	PING.EXE

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3632	Shipment Document BL,INV and packing list.jpg.exe
3632	Shipment Document BL,INV and packing list.jpg.exe
3772	remcos.exe
3772	remcos.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3632 wrote to memory of 3828	3632	Shipment Document BL,INV and packing list.jpg.exe	67
PID 3632 wrote to memory of 3828	3632	Shipment Document BL,INV and packing list.jpg.exe	67
PID 3632 wrote to memory of 3828	3632	Shipment Document BL,INV and packing list.jpg.exe	67
PID 3828 wrote to memory of 3836	3828	Shipment Document BL,INV and packing list.jpg.exe	68
PID 3828 wrote to memory of 3836	3828	Shipment Document BL,INV and packing list.jpg.exe	68
PID 3828 wrote to memory of 3836	3828	Shipment Document BL,INV and packing list.jpg.exe	68
PID 3836 wrote to memory of 3568	3836	cmd.exe	70
PID 3836 wrote to memory of 3568	3836	cmd.exe	70
PID 3836 wrote to memory of 3568	3836	cmd.exe	70
PID 3836 wrote to memory of 3772	3836	cmd.exe	71
PID 3836 wrote to memory of 3772	3836	cmd.exe	71
PID 3836 wrote to memory of 3772	3836	cmd.exe	71
PID 3772 wrote to memory of 4056	3772	remcos.exe	72
PID 3772 wrote to memory of 4056	3772	remcos.exe	72
PID 3772 wrote to memory of 4056	3772	remcos.exe	72

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
3632	Shipment Document BL,INV and packing list.jpg.exe
3772	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3632 set thread context of 3828	3632	Shipment Document BL,INV and packing list.jpg.exe	67
PID 3772 set thread context of 4056	3772	remcos.exe	72

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4056	remcos.exe

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

C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetThreadContext
PID:3632
- C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe
  "C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe"
  2⤵
  - Adds Run entry to start application
  - Suspicious use of WriteProcessMemory
  PID:3828
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3836
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      Runs ping.exe
      PID:3568
  - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
      "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of WriteProcessMemory
      Suspicious behavior: MapViewOfSection
      Suspicious use of SetThreadContext
      PID:3772
    - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        5⤵
        Executes dropped EXE
        Suspicious use of SetWindowsHookEx
        Adds Run entry to start application
        Suspicious behavior: GetForegroundWindowSpam
        
        PID:4056

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3828-0-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3828-2-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4056-13-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

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