remcos | 4bcbb8983fe7425976c5a1789deff73fb138e80981f5ebfef1f835bcc6757760

Resubmissions

14/04/2025, 07:51

250414-jp1kfssjz9 10

14/04/2025, 07:46

250414-jl9nyssjt9 10

08/04/2025, 15:58

250408-tevasswl18 10

08/04/2025, 14:19

250408-rm2nqsvqw2 10

Analysis

max time kernel
145s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20250410-en
resource tags

arch:x64arch:x86image:win11-20250410-enlocale:en-usos:windows11-21h2-x64system
submitted
14/04/2025, 07:46

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General

Target

fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
Size

1.9MB
MD5

61d8d796a3ad816357cb444faa6e393b
SHA1

ce40cb81364e079c7b9e11b16d61c94419b43610
SHA256

fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884
SHA512

4c5de9f0c8cc9e8aec193955378b823bae3406b07cf6820e9fbff2f478d2550affeeaaf96a1edeb8f17045ec1912d23965ad4085620d7fe58e2be0ca27e86db2
SSDEEP

24576:wD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6p:wF+QrFUBgq25eKu6p

Score

10^/10

remcos host discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
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 4 IoCs

pid	Process
3404	sbietrcl.exe
5136	sbietrcl.exe
4456	sbietrcl.exe
5024	sbietrcl.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4144164418-4152157973-2926181071-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3404 set thread context of 4456	3404	sbietrcl.exe	82
PID 5136 set thread context of 5024	5136	sbietrcl.exe	83

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 4 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	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
5136	sbietrcl.exe
5136	sbietrcl.exe
5136	sbietrcl.exe
5136	sbietrcl.exe
5136	sbietrcl.exe
5136	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
Token: SeDebugPrivilege	3404	sbietrcl.exe
Token: SeDebugPrivilege	5136	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4456	sbietrcl.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 5724 wrote to memory of 3404	5724	cmd.exe	80
PID 5724 wrote to memory of 3404	5724	cmd.exe	80
PID 5724 wrote to memory of 3404	5724	cmd.exe	80
PID 5556 wrote to memory of 5136	5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe	81
PID 5556 wrote to memory of 5136	5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe	81
PID 5556 wrote to memory of 5136	5556	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe	81
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 3404 wrote to memory of 4456	3404	sbietrcl.exe	82
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83
PID 5136 wrote to memory of 5024	5136	sbietrcl.exe	83

C:\Users\Admin\AppData\Local\Temp\fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
"C:\Users\Admin\AppData\Local\Temp\fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5556
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5136
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    PID:5024

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
1⤵
- Suspicious use of WriteProcessMemory
PID:5724
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3404
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4456

Network

MITRE ATT&CK Enterprise v16

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\sbietrcl.exe.log

Filesize
400B

MD5
120bfac9d59228edf92ec26d4bbfaf9e

SHA1
bc36d828b7f358671ef0cb934c4ab2fdfb02b447

SHA256
c4c6e7ef90b460bf232e55933594a95ba4a2d156fa5accb06d1c7c2f817fcf35

SHA512
684f086ff7d41d85782b21f5bc7e79584f5866f3c06eabbca2c5a697c1d142aa81e0dc25c78be978ba67e9e6fc014f3b62d1da114dc1bb009c7637491a619137

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
1.9MB

MD5
10696ac0fffbddfa48a8b992f43a8c91

SHA1
198bffb1a2bb45cf531e946de453f9589e16d856

SHA256
f4f149e31187ab9fa20f4462b152eadf36c622087b668a2c489735ffb40247f5

SHA512
286367c074966c093eaa9ca807a1e201f906bf38d643d74f3dbe5bdfe1ee6cbe4ade21aae80c28122f80ad5b9970ae6940599ad2367fd6b5a3e1f869facac1a2

Download Submit
memory/3404-36-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3404-23-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/4456-37-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4456-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4456-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4456-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4456-28-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5136-27-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5136-40-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-18-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-26-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-24-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-22-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-0-0x0000000074721000-0x0000000074722000-memory.dmp

Filesize
4KB

Download
memory/5556-6-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-5-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-2-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5556-1-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download