remcos | 4e5088984e5d2304a531271ae248973b36e6d96a7f48f0dc56a92ffd951452fc

Analysis

max time kernel
102s
max time network
144s
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, 06:17

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General

Target

0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
Size

1.9MB
MD5

efeb41149ebe2e2a9c2f65197b26c50e
SHA1

bce5c0489fdcb97e393c8134dbada6f877a6cee8
SHA256

0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647
SHA512

2a8462a25d2457a362d3d2fcd70480c49ae6dfa30dd699caf4196da91aa47bbd558dc0e4c1bd4270d2069ae88c59de4fb657973ec7b324197c57142e0a3bcf0d
SSDEEP

24576:wD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6K:wF+QrFUBgq25eKu6K

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

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-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe

Executes dropped EXE 2 IoCs

pid	Process
2308	sbietrcl.exe
4900	sbietrcl.exe

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-1-5-21-308834014-1004923324-1191300197-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2308 set thread context of 4900	2308	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 2 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	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
2308	sbietrcl.exe
2308	sbietrcl.exe
2308	sbietrcl.exe
2308	sbietrcl.exe
2308	sbietrcl.exe
2308	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
Token: SeDebugPrivilege	2308	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5044 wrote to memory of 2308	5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe	93
PID 5044 wrote to memory of 2308	5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe	93
PID 5044 wrote to memory of 2308	5044	0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe	93
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95
PID 2308 wrote to memory of 4900	2308	sbietrcl.exe	95

C:\Users\Admin\AppData\Local\Temp\0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.exe
"C:\Users\Admin\AppData\Local\Temp\0736e2c073088395349f1f3c923c211f0d62fcd794181a9dbf6d5366cabc6647.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:5044
- 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:2308
- - 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:4900

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

Filesize
1.9MB

MD5
c834965253147346a96ec31ecbb377d1

SHA1
d7aa853c20e25015bbdbe7bb48a5a9cd4e7a6ed8

SHA256
1879c70572c8e24e35c13ab35415abdbcd60e1562040650b87399db6c725764e

SHA512
3f325706a68332444ab9c344118e5cd7f5296358dd5f0d9cf622d62139e7ab2496424a780b769961abea80af9c8b29ce1b6a5f6fedd0b2a9b32a3a552980e5fa

Download Submit
memory/2308-38-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/2308-32-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/2308-31-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/2308-30-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/2308-29-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/4900-34-0x0000000000570000-0x0000000000587000-memory.dmp

Filesize
92KB

Download
memory/5044-3-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5044-28-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5044-17-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5044-16-0x0000000074742000-0x0000000074743000-memory.dmp

Filesize
4KB

Download
memory/5044-4-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5044-0-0x0000000074742000-0x0000000074743000-memory.dmp

Filesize
4KB

Download
memory/5044-2-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download
memory/5044-1-0x0000000074740000-0x0000000074CF1000-memory.dmp

Filesize
5.7MB

Download