remcos | b1b0fa6f46557e5804b683bc76db76dd71246753726ce7645ab3804ec1d68a44

General

Target
MS710543PS.exe
Size 787KB
Sample210817-41pg3sh18s
SHA256 b1b0fa6f46557e5804b683bc76db76dd71246753726ce7645ab3804ec1d68a44
MD5 bf8ac1ff88b18b3a4caa241b21ecdd9f
SHA1 03477c1d43cdb293d33e1df2622e494361fb634a
SHA512 a353e09583f27c2271fb36cc72f44b1372164bd6f2a7416cc594f664d4d7ca5e1dfc7c86698a50d915b594c0a8fb62b326d81db305ca04a5e911f1aac76e309f
MD5 SHA1 SHA512

Score

10^/10

remcos dave persistence rat

Malware Config

Extracted

Family

remcos

Version

3.2.0 Pro

Botnet

DAVE

C2

172.93.187.66:1642

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-NYFEWK
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1412	remcos.exe
2168	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-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	MS710543PS.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	MS710543PS.exe
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 652 set thread context of 3764	652	MS710543PS.exe	76
PID 1412 set thread context of 2168	1412	remcos.exe	81

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1594587808-2047097707-2163810515-1000_Classes\Local Settings	MS710543PS.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2168	remcos.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
652	MS710543PS.exe
1412	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2168	remcos.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 652 wrote to memory of 3764	652	MS710543PS.exe	76
PID 652 wrote to memory of 3764	652	MS710543PS.exe	76
PID 652 wrote to memory of 3764	652	MS710543PS.exe	76
PID 652 wrote to memory of 3764	652	MS710543PS.exe	76
PID 3764 wrote to memory of 3488	3764	MS710543PS.exe	77
PID 3764 wrote to memory of 3488	3764	MS710543PS.exe	77
PID 3764 wrote to memory of 3488	3764	MS710543PS.exe	77
PID 3488 wrote to memory of 2840	3488	WScript.exe	78
PID 3488 wrote to memory of 2840	3488	WScript.exe	78
PID 3488 wrote to memory of 2840	3488	WScript.exe	78
PID 2840 wrote to memory of 1412	2840	cmd.exe	80
PID 2840 wrote to memory of 1412	2840	cmd.exe	80
PID 2840 wrote to memory of 1412	2840	cmd.exe	80
PID 1412 wrote to memory of 2168	1412	remcos.exe	81
PID 1412 wrote to memory of 2168	1412	remcos.exe	81
PID 1412 wrote to memory of 2168	1412	remcos.exe	81
PID 1412 wrote to memory of 2168	1412	remcos.exe	81

C:\Users\Admin\AppData\Local\Temp\MS710543PS.exe
"C:\Users\Admin\AppData\Local\Temp\MS710543PS.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:652
- C:\Users\Admin\AppData\Local\Temp\MS710543PS.exe
  "C:\Users\Admin\AppData\Local\Temp\MS710543PS.exe"
  2⤵
  - Adds Run key to start application
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3764
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3488
  - - 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:2840
    - - 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 behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:1412
      - 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 behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        
        PID:2168

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/652-117-0x0000000002B70000-0x0000000002B72000-memory.dmp

Download

memory/2168-129-0x0000000000400000-0x0000000000479000-memory.dmp

Download

memory/3764-118-0x0000000000400000-0x0000000000479000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads