remcos | fa18c4f6cf710cc1cb846eff0c661373b9f73c3343feb0f936ee6b47014ea944

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
28-08-2024 13:17

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General

Target

c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe
Size

575KB
MD5

c6ecc9e2a17ad00d09b3ead6c1f333f9
SHA1

965d636562e120fbc204b1dc2159f577f4516d73
SHA256

fa18c4f6cf710cc1cb846eff0c661373b9f73c3343feb0f936ee6b47014ea944
SHA512

2567ded3b3b8cdbcd8ba913742694fbad9d08896541fcf63b1da50bd9579d5f0738be9a0a7bca924f5abab9fa91ca102c2a592ddaf61018e256a5a2dbc12dcb0
SSDEEP

12288:W2fSRHrD3yXWWcKk2H+XMM/eQYIuynBHkvbtihJMIHoB:W2fSRHrD3yGWcKk2LQYIFHkv+k

Score

10^/10

remcos victim-new discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.0.4 Pro

Botnet

Victim-new

www.suchfamily.eu:5563

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
winsoft.exe
copy_folder
System32
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
BKKDNKDNODNDKNDIODNKDNK-6KWIAE
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
windonw
take_screenshot_option
true
take_screenshot_time
5
take_screenshot_title
Wire Transfer;Payment Slips;Bank Login;Bitcoins;Shares

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
3984	winsoft.exe
832	winsoft.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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\windonw = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\winsoft.exe\""	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\windonw = "\"C:\\Users\\Admin\\AppData\\Roaming\\System32\\winsoft.exe\""	winsoft.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3876 set thread context of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3984 set thread context of 832	3984	winsoft.exe	92

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 5 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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winsoft.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000_Classes\Local Settings	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
832	winsoft.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
832	winsoft.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 3876 wrote to memory of 4744	3876	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	86
PID 4744 wrote to memory of 4968	4744	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	88
PID 4744 wrote to memory of 4968	4744	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	88
PID 4744 wrote to memory of 4968	4744	c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe	88
PID 4968 wrote to memory of 3996	4968	WScript.exe	89
PID 4968 wrote to memory of 3996	4968	WScript.exe	89
PID 4968 wrote to memory of 3996	4968	WScript.exe	89
PID 3996 wrote to memory of 3984	3996	cmd.exe	91
PID 3996 wrote to memory of 3984	3996	cmd.exe	91
PID 3996 wrote to memory of 3984	3996	cmd.exe	91
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92
PID 3984 wrote to memory of 832	3984	winsoft.exe	92

C:\Users\Admin\AppData\Local\Temp\c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3876
- C:\Users\Admin\AppData\Local\Temp\c6ecc9e2a17ad00d09b3ead6c1f333f9_JaffaCakes118.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4744
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4968
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\System32\winsoft.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3996
    - - C:\Users\Admin\AppData\Roaming\System32\winsoft.exe
        
        C:\Users\Admin\AppData\Roaming\System32\winsoft.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3984
      - C:\Users\Admin\AppData\Roaming\System32\winsoft.exe
        
        "{path}"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious behavior: GetForegroundWindowSpam
        Suspicious use of SetWindowsHookEx
        
        PID:832

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
424B

MD5
5643fb2a18890c974d7c6e5a15d5fcd5

SHA1
c2bc62799a01aed6c5ac18f8ec03a3c57ebb7486

SHA256
39fa039816b2557dd53ddfd64f53794ea53c48888c738da4d7eaf8f6b99c6240

SHA512
1d699c95f4d323f4455056cb84eabcda5216721a0ac512275926e424aa1cebcb920f234aba0e1c8f7735ded9d42a129f91b7c86632af762b7532adaaed5c5fb5

Download Submit
C:\Users\Admin\AppData\Roaming\System32\winsoft.exe

Filesize
575KB

MD5
c6ecc9e2a17ad00d09b3ead6c1f333f9

SHA1
965d636562e120fbc204b1dc2159f577f4516d73

SHA256
fa18c4f6cf710cc1cb846eff0c661373b9f73c3343feb0f936ee6b47014ea944

SHA512
2567ded3b3b8cdbcd8ba913742694fbad9d08896541fcf63b1da50bd9579d5f0738be9a0a7bca924f5abab9fa91ca102c2a592ddaf61018e256a5a2dbc12dcb0

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

Filesize
79B

MD5
9e9de82ee285bd2b2d2f0df5ea69be58

SHA1
28023f87213c1844c4da9b71e19ed582fbd72afc

SHA256
c050f0e5bb6f026476c0a2d47cc3b2d03cb9354ae73394d13731156aaf44d6c5

SHA512
ef18203aa781269c468e6ad5b17f2e098a1a9e4d011759e4a9570f90d22b5bf6593163186f65ca03f3c6839b0a24317979f93ef8140c8c7bc9bd5757c0657be4

Download Submit
memory/832-23-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/832-25-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/3876-1-0x0000000000AB0000-0x0000000000B44000-memory.dmp

Filesize
592KB

Download
memory/3876-2-0x0000000005410000-0x0000000005496000-memory.dmp

Filesize
536KB

Download
memory/3876-3-0x0000000005530000-0x00000000055CC000-memory.dmp

Filesize
624KB

Download
memory/3876-4-0x0000000005B80000-0x0000000006124000-memory.dmp

Filesize
5.6MB

Download
memory/3876-5-0x00000000030B0000-0x00000000030B8000-memory.dmp

Filesize
32KB

Download
memory/3876-0-0x00000000752CE000-0x00000000752CF000-memory.dmp

Filesize
4KB

Download
memory/4744-6-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4744-15-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4744-10-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/4744-9-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads