remcos | 029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 21:52

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
Size

293KB
MD5

15d69c839a4f4336de4b78c53adaa500
SHA1

829c2f6d3b9be98802ebb5e95a7fc2f87d33d210
SHA256

029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049
SHA512

e2e60b7c622c6f738a38437aa73df0c50fe2ac50389c4d564e947402385f5e06bcc4b60588ac17c4cae4b7e536061cc292b457bde832c8b1555eea1cfcb36dc0
SSDEEP

6144:f5ZdP3uQMi7StiABLHGEEUqdGrxrL0Or1jQQdy02sbY7:fdP3d2uO0Or1WkbY7

Score

10^/10

remcos planes discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.1.0 Pro

Botnet

Planes

remfff.duckdns.org:48604

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
csrss.exe
copy_folder
csrss.exe
delete_file
false
hide_file
true
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
RemcosXs-L20P2E
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
csrss.exe
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2752	csrss.exe
2548	csrss.exe

Loads dropped DLL 2 IoCs

pid	Process
2664	cmd.exe
2664	cmd.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe\\csrss.exe\""	csrss.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3290804112-2823094203-3137964600-1000\Software\Microsoft\Windows\CurrentVersion\Run\csrss.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\csrss.exe\\csrss.exe\""	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csrss.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Suspicious behavior: EnumeratesProcesses 32 IoCs

pid	Process
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe
2752	csrss.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
2752	csrss.exe
2752	csrss.exe
2548	csrss.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2120 wrote to memory of 2716	2120	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	32
PID 2716 wrote to memory of 2776	2716	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	33
PID 2716 wrote to memory of 2776	2716	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	33
PID 2716 wrote to memory of 2776	2716	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	33
PID 2716 wrote to memory of 2776	2716	029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe	33
PID 2776 wrote to memory of 2664	2776	WScript.exe	34
PID 2776 wrote to memory of 2664	2776	WScript.exe	34
PID 2776 wrote to memory of 2664	2776	WScript.exe	34
PID 2776 wrote to memory of 2664	2776	WScript.exe	34
PID 2664 wrote to memory of 2752	2664	cmd.exe	36
PID 2664 wrote to memory of 2752	2664	cmd.exe	36
PID 2664 wrote to memory of 2752	2664	cmd.exe	36
PID 2664 wrote to memory of 2752	2664	cmd.exe	36
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37
PID 2752 wrote to memory of 2548	2752	csrss.exe	37

C:\Users\Admin\AppData\Local\Temp\029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
"C:\Users\Admin\AppData\Local\Temp\029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2120
- C:\Users\Admin\AppData\Local\Temp\029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe
  "C:\Users\Admin\AppData\Local\Temp\029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049N.exe"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2776
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\csrss.exe\csrss.exe"
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2664
    - - C:\Users\Admin\AppData\Roaming\csrss.exe\csrss.exe
        
        C:\Users\Admin\AppData\Roaming\csrss.exe\csrss.exe
        5⤵
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:2752
      - C:\Users\Admin\AppData\Roaming\csrss.exe\csrss.exe
        
        C:\Users\Admin\AppData\Roaming\csrss.exe\csrss.exe
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:2548

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
422B

MD5
f3ed21a8dbf48ccf6487d68cd12b8e89

SHA1
37b725cdc3bb8b91cb6242529721a2c3f1f03af2

SHA256
a2c8cc5a927929bb186c39f2deefa5ca869ab705ada7b13c2687a54c99df0416

SHA512
da85bc3517b3d085a29ae9c1a200ca7ae6c46f6bff4d5dc199bf493e6eda9cd223acf3945a4e24ae24f5a7fbc134f0345d725a6af1061b6c3f526ffec599851f

Download Submit
C:\Users\Admin\AppData\Roaming\csrss.exe\csrss.exe

Filesize
293KB

MD5
15d69c839a4f4336de4b78c53adaa500

SHA1
829c2f6d3b9be98802ebb5e95a7fc2f87d33d210

SHA256
029783fcf4e6f9e78a2db3e8d9caa398f8bfa5cc857c69eabdeb67e66e637049

SHA512
e2e60b7c622c6f738a38437aa73df0c50fe2ac50389c4d564e947402385f5e06bcc4b60588ac17c4cae4b7e536061cc292b457bde832c8b1555eea1cfcb36dc0

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
79B

MD5
6534f458f8d22de9544e9c855fc4a5c1

SHA1
ac503fb585096a72d90a6b68cc94a2743ea9ecd1

SHA256
8921d37d282745731b5c7cd7680076ea14a740cd32082ef30d706e4f4f88c68c

SHA512
59386093b0374928d5f526b8d013ff1177047d827dfecd731fc6c51bb350ea18a65334844379f39ffe2bdc9b686f97fd48654158791618a4f90c556109a6c474

Download Submit
memory/2120-4-0x0000000000450000-0x00000000004CB000-memory.dmp

Filesize
492KB

Download
memory/2120-0-0x0000000000450000-0x00000000004CB000-memory.dmp

Filesize
492KB

Download
memory/2120-2-0x0000000000450000-0x00000000004CB000-memory.dmp

Filesize
492KB

Download
memory/2120-1-0x0000000077BDF000-0x0000000077BE0000-memory.dmp

Filesize
4KB

Download
memory/2548-21-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2548-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2548-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2548-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2548-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2716-5-0x00000000001B0000-0x00000000001B1000-memory.dmp

Filesize
4KB

Download
memory/2716-6-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2716-13-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2716-3-0x0000000077BDF000-0x0000000077BE0000-memory.dmp

Filesize
4KB

Download