remcos | 94e8a6833f7e7c032ebf5d826f11876df763683aa55aa69a89fbfaef04937cfc

Analysis

max time kernel
148s
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
10-09-2024 19:23

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

CHT International.exe
Size

850KB
MD5

f87e2aeb7bcbbb476a5d157602e47dca
SHA1

238f66f3053f2e154bf0a099aeab72698f6689e3
SHA256

848aee75718b5e635f13a64dcb64dd0c0d4d44228952d2941a9c4c1c14fd7ea1
SHA512

274b995615962f3ab52eacc6c393a76dc46aa431d109d450e37971548c0181d4ffbf048de6b2aad20aac82920f6aab425b2ce41887e1eb69e47ec28cc2798f47
SSDEEP

12288:EILpqyf4jsY/ipLmA0Hrx5ulDUyXzzq1CXvQaAQbiWzx51SwasKcZtlH0j2qDSvV:EIIyfws4FrnIvq0f5A4iWzx5nasRtpy

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

3.0.2 Pro

Botnet

RemoteHost

fgtrert.duckdns.org:8494

fgtrert.duckdns.orgqweerreww.duckdns.org:8494

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-VXX167
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
wikipedia;solitaire;

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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	CHT International.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 2 IoCs

pid	Process
536	remcos.exe
1148	remcos.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-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	CHT International.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\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 4224 set thread context of 5084	4224	CHT International.exe	95
PID 536 set thread context of 1148	536	remcos.exe	101

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	CHT International.exe
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	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	CHT International.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000_Classes\Local Settings	CHT International.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4224	CHT International.exe
4224	CHT International.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4224	CHT International.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1148	remcos.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 4224 wrote to memory of 3596	4224	CHT International.exe	94
PID 4224 wrote to memory of 3596	4224	CHT International.exe	94
PID 4224 wrote to memory of 3596	4224	CHT International.exe	94
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 4224 wrote to memory of 5084	4224	CHT International.exe	95
PID 5084 wrote to memory of 3064	5084	CHT International.exe	96
PID 5084 wrote to memory of 3064	5084	CHT International.exe	96
PID 5084 wrote to memory of 3064	5084	CHT International.exe	96
PID 3064 wrote to memory of 1860	3064	WScript.exe	98
PID 3064 wrote to memory of 1860	3064	WScript.exe	98
PID 3064 wrote to memory of 1860	3064	WScript.exe	98
PID 1860 wrote to memory of 536	1860	cmd.exe	100
PID 1860 wrote to memory of 536	1860	cmd.exe	100
PID 1860 wrote to memory of 536	1860	cmd.exe	100
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 536 wrote to memory of 1148	536	remcos.exe	101
PID 1148 wrote to memory of 4772	1148	remcos.exe	102
PID 1148 wrote to memory of 4772	1148	remcos.exe	102
PID 1148 wrote to memory of 4772	1148	remcos.exe	102

C:\Users\Admin\AppData\Local\Temp\CHT International.exe
"C:\Users\Admin\AppData\Local\Temp\CHT International.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4224
- C:\Users\Admin\AppData\Local\Temp\CHT International.exe
  "{path}"
  2⤵
  PID:3596
- C:\Users\Admin\AppData\Local\Temp\CHT International.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:5084
- - 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:3064
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1860
    - - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        5⤵
        Executes dropped EXE
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:536
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        "{path}"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1148
        
        C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        7⤵
        
        PID:4772

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
418B

MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

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

Filesize
74B

MD5
53095e47d543b20e9c70d010983799a5

SHA1
d49a7ad8f46c386bc3fe48fd164c0e83768dbd05

SHA256
2edb12bc47c8edf9aeba1454d498907650c3debf3af40a9c9bce23f334f13593

SHA512
82fb8298189a55338f97b36778e4265452a9ac2a7a505ff67adaa7fd8b22ef3b85649c90a1226fcf91f5e0ea1c453ae3e418630570b9c3f5f7cb4f10243e3f4b

Download Submit
C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe

Filesize
850KB

MD5
f87e2aeb7bcbbb476a5d157602e47dca

SHA1
238f66f3053f2e154bf0a099aeab72698f6689e3

SHA256
848aee75718b5e635f13a64dcb64dd0c0d4d44228952d2941a9c4c1c14fd7ea1

SHA512
274b995615962f3ab52eacc6c393a76dc46aa431d109d450e37971548c0181d4ffbf048de6b2aad20aac82920f6aab425b2ce41887e1eb69e47ec28cc2798f47

Download Submit
memory/1148-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1148-30-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1148-36-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1148-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4224-6-0x0000000006710000-0x00000000067AC000-memory.dmp

Filesize
624KB

Download
memory/4224-5-0x00000000050E0000-0x00000000050EA000-memory.dmp

Filesize
40KB

Download
memory/4224-9-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/4224-10-0x00000000068B0000-0x000000000697C000-memory.dmp

Filesize
816KB

Download
memory/4224-1-0x0000000000630000-0x000000000070A000-memory.dmp

Filesize
872KB

Download
memory/4224-8-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

Filesize
4KB

Download
memory/4224-2-0x0000000005630000-0x0000000005BD4000-memory.dmp

Filesize
5.6MB

Download
memory/4224-15-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/4224-3-0x0000000005120000-0x00000000051B2000-memory.dmp

Filesize
584KB

Download
memory/4224-4-0x0000000074B30000-0x00000000752E0000-memory.dmp

Filesize
7.7MB

Download
memory/4224-7-0x0000000006700000-0x0000000006708000-memory.dmp

Filesize
32KB

Download
memory/4224-0-0x0000000074B3E000-0x0000000074B3F000-memory.dmp

Filesize
4KB

Download
memory/5084-12-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5084-21-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5084-16-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5084-14-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/5084-11-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download