remcos | 39b6534e71eea7f25cd242cbeec0e465b211f8cd453172f284feac37ae8c973d

General

Target
Bill of lading.pdf.gz.exe
Size 552KB
Sample201109-pshkpgs22j
SHA256 39b6534e71eea7f25cd242cbeec0e465b211f8cd453172f284feac37ae8c973d
MD5 17fecc5eae4701cf4152a1bc31831e5e
SHA1 fb28953a852c3f85f0c6271b31a4733cdf32cf16
SHA512 c216b5656d2cfbe5284de2a62280020f0d4f0a441a908a6c50fb08c3535f097b0351198de8145918cd424016addb9dcf3e5ccdd86b770ed13b3f972ca93a4b92
MD5 SHA1 SHA512

Score

10^/10

remcos persistence rat

Malware Config

Extracted

Family

remcos

C2

magiobi.myq-see.com:20207

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
928	remcos.exe
716	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
Set value (str)	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\remoteaccess = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc\\remcos.exe\""	Bill of lading.pdf.gz.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\remoteaccess = "\"C:\\Users\\Admin\\AppData\\Roaming\\vlc\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Bill of lading.pdf.gz.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 648 set thread context of 3912	648	Bill of lading.pdf.gz.exe	74
PID 928 set thread context of 716	928	remcos.exe	80

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1985363256-3005190890-1182679451-1000_Classes\Local Settings	Bill of lading.pdf.gz.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
648	Bill of lading.pdf.gz.exe
648	Bill of lading.pdf.gz.exe
928	remcos.exe
928	remcos.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
648	Bill of lading.pdf.gz.exe
928	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
716	remcos.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 648 wrote to memory of 3912	648	Bill of lading.pdf.gz.exe	74
PID 648 wrote to memory of 3912	648	Bill of lading.pdf.gz.exe	74
PID 648 wrote to memory of 3912	648	Bill of lading.pdf.gz.exe	74
PID 3912 wrote to memory of 3580	3912	Bill of lading.pdf.gz.exe	76
PID 3912 wrote to memory of 3580	3912	Bill of lading.pdf.gz.exe	76
PID 3912 wrote to memory of 3580	3912	Bill of lading.pdf.gz.exe	76
PID 3580 wrote to memory of 3324	3580	WScript.exe	77
PID 3580 wrote to memory of 3324	3580	WScript.exe	77
PID 3580 wrote to memory of 3324	3580	WScript.exe	77
PID 3324 wrote to memory of 928	3324	cmd.exe	79
PID 3324 wrote to memory of 928	3324	cmd.exe	79
PID 3324 wrote to memory of 928	3324	cmd.exe	79
PID 928 wrote to memory of 716	928	remcos.exe	80
PID 928 wrote to memory of 716	928	remcos.exe	80
PID 928 wrote to memory of 716	928	remcos.exe	80

C:\Users\Admin\AppData\Local\Temp\Bill of lading.pdf.gz.exe
"C:\Users\Admin\AppData\Local\Temp\Bill of lading.pdf.gz.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:648
- C:\Users\Admin\AppData\Local\Temp\Bill of lading.pdf.gz.exe
  "C:\Users\Admin\AppData\Local\Temp\Bill of lading.pdf.gz.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3912
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3580
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\vlc\remcos.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3324
    - - C:\Users\Admin\AppData\Roaming\vlc\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\vlc\remcos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:928
      - C:\Users\Admin\AppData\Roaming\vlc\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\vlc\remcos.exe
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:716

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/3912-0-0x0000000000400000-0x0000000000420000-memory.dmp

Download

memory/3912-2-0x0000000000400000-0x0000000000420000-memory.dmp