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
896s
max time network
901s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
08/04/2025, 15:58

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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

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-1-5-21-3975168204-1612096350-4002976354-1000\Control Panel\International\Geo\Nation	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe

Executes dropped EXE 4 IoCs

pid	Process
3404	sbietrcl.exe
5020	sbietrcl.exe
5912	sbietrcl.exe
2588	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-1-5-21-3975168204-1612096350-4002976354-1000\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 5912	3404	sbietrcl.exe	96
PID 5020 set thread context of 2588	5020	sbietrcl.exe	99

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
2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
3404	sbietrcl.exe
5020	sbietrcl.exe
5020	sbietrcl.exe
5020	sbietrcl.exe
5020	sbietrcl.exe
5020	sbietrcl.exe
5020	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
Token: SeDebugPrivilege	3404	sbietrcl.exe
Token: SeDebugPrivilege	5020	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5912	sbietrcl.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1876 wrote to memory of 3404	1876	cmd.exe	92
PID 1876 wrote to memory of 3404	1876	cmd.exe	92
PID 1876 wrote to memory of 3404	1876	cmd.exe	92
PID 2652 wrote to memory of 5020	2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe	93
PID 2652 wrote to memory of 5020	2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe	93
PID 2652 wrote to memory of 5020	2652	fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe	93
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 3404 wrote to memory of 5912	3404	sbietrcl.exe	96
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99
PID 5020 wrote to memory of 2588	5020	sbietrcl.exe	99

C:\Users\Admin\AppData\Local\Temp\fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.exe
"C:\Users\Admin\AppData\Local\Temp\fa8e531e0860851ba2d1fb27a07f1879162d4f9bee94df2b818bae9d7834a884.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:2652
- 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:5020
- - 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:2588

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:1876
- 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:5912

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

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\Local\Microsoft\CLR_v2.0_32\UsageLogs\sbietrcl.exe.log

Filesize
400B

MD5
0a9b4592cd49c3c21f6767c2dabda92f

SHA1
f534297527ae5ccc0ecb2221ddeb8e58daeb8b74

SHA256
c7effe9cb81a70d738dee863991afefab040290d4c4b78b4202383bcb9f88fcd

SHA512
6b878df474e5bbfb8e9e265f15a76560c2ef151dcebc6388c82d7f6f86ffaf83f5ade5a09f1842e493cb6c8fd63b0b88d088c728fd725f7139f965a5ee332307

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

Filesize
1.9MB

MD5
19bad8aae481ef7c9af0e2bba7cbdd68

SHA1
2375baab921f78d64c6b219fa76839e8656e62bc

SHA256
a7f6514ac9bce30b0168ca054461e393e5ea0757a57385d346ac1daa28ad6710

SHA512
bb7bec508ed0b900084ec1da704de3f598c2345fd45e9a1b17e7c965fb0499b359acf9083629c63956c63748835ce9cf479f94d17c84a9c59e01ed1e33b2c0fa

Download Submit
memory/2652-25-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-26-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-4-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-16-0x0000000074DE2000-0x0000000074DE3000-memory.dmp

Filesize
4KB

Download
memory/2652-17-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-2-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-1-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-3-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/2652-0-0x0000000074DE2000-0x0000000074DE3000-memory.dmp

Filesize
4KB

Download
memory/3404-22-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/3404-23-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/3404-37-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/3404-21-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/5020-27-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/5020-42-0x0000000074DE0000-0x0000000075391000-memory.dmp

Filesize
5.7MB

Download
memory/5912-28-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5912-30-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5912-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5912-34-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5912-33-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download