remcos | 286e0821c9dff60f28f608fbc48788495e4fc25616f718991a9b1979fce08cac

Analysis

max time kernel
139s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
22/03/2025, 06:15

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General

Target

b1caa98d799555b069cbab81864da4e3.exe
Size

1.8MB
MD5

b1caa98d799555b069cbab81864da4e3
SHA1

5378ec401b30bee17e591f36ec04d0f6e2c7ea11
SHA256

32f40684e82a342dfdd376030e5f2401abc3d84929b516478ab71750f50f223d
SHA512

af3ccb545117991c133b56fb8c91b5b084d98628b863f1a9072f9140431ffeb8ce3128a7a642de153cdeccc0837e39ec77976f03e992518a286c84d883bc000c
SSDEEP

24576:fD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6W:fF+QrFUBgq25eKu6W

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

Checks computer location settings 2 TTPs 1 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-1-5-21-814918696-1585701690-3140955116-1000\Control Panel\International\Geo\Nation	b1caa98d799555b069cbab81864da4e3.exe

Executes dropped EXE 2 IoCs

pid	Process
3592	sbietrcl.exe
4984	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-1-5-21-814918696-1585701690-3140955116-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	b1caa98d799555b069cbab81864da4e3.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3592 set thread context of 4984	3592	sbietrcl.exe	95

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 3 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	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b1caa98d799555b069cbab81864da4e3.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2500	b1caa98d799555b069cbab81864da4e3.exe
2500	b1caa98d799555b069cbab81864da4e3.exe
2500	b1caa98d799555b069cbab81864da4e3.exe
2500	b1caa98d799555b069cbab81864da4e3.exe
2500	b1caa98d799555b069cbab81864da4e3.exe
2500	b1caa98d799555b069cbab81864da4e3.exe
3592	sbietrcl.exe
3592	sbietrcl.exe
3592	sbietrcl.exe
3592	sbietrcl.exe
3592	sbietrcl.exe
3592	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2500	b1caa98d799555b069cbab81864da4e3.exe
Token: SeDebugPrivilege	3592	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4984	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2500 wrote to memory of 3592	2500	b1caa98d799555b069cbab81864da4e3.exe	94
PID 2500 wrote to memory of 3592	2500	b1caa98d799555b069cbab81864da4e3.exe	94
PID 2500 wrote to memory of 3592	2500	b1caa98d799555b069cbab81864da4e3.exe	94
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95
PID 3592 wrote to memory of 4984	3592	sbietrcl.exe	95

C:\Users\Admin\AppData\Local\Temp\b1caa98d799555b069cbab81864da4e3.exe
"C:\Users\Admin\AppData\Local\Temp\b1caa98d799555b069cbab81864da4e3.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2500
- 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:3592
- - 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:4984

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Query Registry

T1012

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\Roaming\Microsoft\Windows\Templates\sbietrcl.exe

Filesize
1.8MB

MD5
4592853128ea4e730a083b2c712e0b5c

SHA1
5606414a0de15418a143b471c9f24b4460e32793

SHA256
339dff8dfddb844c31d4cbda11e85f5f98d6c6452ac3c570c2468aed0cb6c785

SHA512
ad85cc7adb4857b4a1545f80eadecb21d6c6072d22f056ad8b9dbe319d769dc6dcc54e2bb6242147a086a53094578c2016fa911205453a1f235fc93a10ea7921

Download Submit
memory/2500-0-0x0000000074912000-0x0000000074913000-memory.dmp

Filesize
4KB

Download
memory/2500-1-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/2500-2-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/2500-6-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/2500-5-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/2500-18-0x0000000074912000-0x0000000074913000-memory.dmp

Filesize
4KB

Download
memory/2500-19-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/2500-31-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/3592-33-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/3592-32-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/3592-30-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/3592-35-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/3592-34-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/3592-47-0x0000000074910000-0x0000000074EC1000-memory.dmp

Filesize
5.7MB

Download
memory/4984-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4984-46-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4984-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4984-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4984-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4984-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4984-50-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download