remcos | a23fdeddb683f716be744ef3fe9a8ce2c87b02f5e5c1f6c8bdb70881de528304

Analysis

max time kernel
143s
max time network
155s
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, 06:16

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General

Target

cf56059ae5d477487f8605c5301ceca1.exe
Size

896KB
MD5

cf56059ae5d477487f8605c5301ceca1
SHA1

7118153147b2cc536e08289ba9c2e798ad38f682
SHA256

cf2fb8d689133eb34553698a3ace508c2cc87c0677df85431cbe89c97e7a1884
SHA512

d6ab0987781cc98723530a8f453cd0667118b235a6ef0700e016893103968a63052e7353ec9875e551f488f2e353a0613bf80e8068e5fe076ccd6aec5d1933af
SSDEEP

12288:7p+rgRNyA55IxJ+feDOa9rZj5XqkJD0QrOod7XxlW91RRz9M9:7pugRNJI1D39dlfGQrFUx9M9

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-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation	cf56059ae5d477487f8605c5301ceca1.exe

Executes dropped EXE 2 IoCs

pid	Process
396	sbietrcl.exe
5056	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-1-5-21-308834014-1004923324-1191300197-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	cf56059ae5d477487f8605c5301ceca1.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 396 set thread context of 5056	396	sbietrcl.exe	92

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	cf56059ae5d477487f8605c5301ceca1.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 12 IoCs

pid	Process
1992	cf56059ae5d477487f8605c5301ceca1.exe
1992	cf56059ae5d477487f8605c5301ceca1.exe
1992	cf56059ae5d477487f8605c5301ceca1.exe
1992	cf56059ae5d477487f8605c5301ceca1.exe
1992	cf56059ae5d477487f8605c5301ceca1.exe
1992	cf56059ae5d477487f8605c5301ceca1.exe
396	sbietrcl.exe
396	sbietrcl.exe
396	sbietrcl.exe
396	sbietrcl.exe
396	sbietrcl.exe
396	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1992	cf56059ae5d477487f8605c5301ceca1.exe
Token: SeDebugPrivilege	396	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5056	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 396	1992	cf56059ae5d477487f8605c5301ceca1.exe	91
PID 1992 wrote to memory of 396	1992	cf56059ae5d477487f8605c5301ceca1.exe	91
PID 1992 wrote to memory of 396	1992	cf56059ae5d477487f8605c5301ceca1.exe	91
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92
PID 396 wrote to memory of 5056	396	sbietrcl.exe	92

C:\Users\Admin\AppData\Local\Temp\cf56059ae5d477487f8605c5301ceca1.exe
"C:\Users\Admin\AppData\Local\Temp\cf56059ae5d477487f8605c5301ceca1.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:1992
- 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:396
- - 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:5056

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
905KB

MD5
8c0428c6e808123be10b452fd3b0dd24

SHA1
e3689f471babf81124660c803664d732747c84a6

SHA256
d94a66760df022ca4257e94cdc782df087b7a3658af22805a5ff8aced92370a2

SHA512
ac07dfe36d9cde5607834a1f1857e8241640a3d2e499629154b9535e642702fd7987b0dda80f2169384066d7b2b9dab4af02c9cccab1d61a06df1d95885007bd

Download Submit
memory/396-47-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/396-35-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/396-34-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/396-32-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/396-31-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-33-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-2-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-19-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-18-0x0000000075292000-0x0000000075293000-memory.dmp

Filesize
4KB

Download
memory/1992-0-0x0000000075292000-0x0000000075293000-memory.dmp

Filesize
4KB

Download
memory/1992-6-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-5-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-20-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/1992-1-0x0000000075290000-0x0000000075841000-memory.dmp

Filesize
5.7MB

Download
memory/5056-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5056-46-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5056-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5056-41-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5056-36-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5056-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5056-50-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download