remcos | a23fdeddb683f716be744ef3fe9a8ce2c87b02f5e5c1f6c8bdb70881de528304

Analysis

max time kernel
140s
max time network
152s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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

Executes dropped EXE 2 IoCs

pid	Process
2748	sbietrcl.exe
2768	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
2264	cf56059ae5d477487f8605c5301ceca1.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-1-5-21-312935884-697965778-3955649944-1000\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 2748 set thread context of 2768	2748	sbietrcl.exe	32

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
2264	cf56059ae5d477487f8605c5301ceca1.exe
2264	cf56059ae5d477487f8605c5301ceca1.exe
2264	cf56059ae5d477487f8605c5301ceca1.exe
2264	cf56059ae5d477487f8605c5301ceca1.exe
2264	cf56059ae5d477487f8605c5301ceca1.exe
2264	cf56059ae5d477487f8605c5301ceca1.exe
2748	sbietrcl.exe
2748	sbietrcl.exe
2748	sbietrcl.exe
2748	sbietrcl.exe
2748	sbietrcl.exe
2748	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2264	cf56059ae5d477487f8605c5301ceca1.exe
Token: SeDebugPrivilege	2748	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2768	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2264 wrote to memory of 2748	2264	cf56059ae5d477487f8605c5301ceca1.exe	31
PID 2264 wrote to memory of 2748	2264	cf56059ae5d477487f8605c5301ceca1.exe	31
PID 2264 wrote to memory of 2748	2264	cf56059ae5d477487f8605c5301ceca1.exe	31
PID 2264 wrote to memory of 2748	2264	cf56059ae5d477487f8605c5301ceca1.exe	31
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32
PID 2748 wrote to memory of 2768	2748	sbietrcl.exe	32

C:\Users\Admin\AppData\Local\Temp\cf56059ae5d477487f8605c5301ceca1.exe
"C:\Users\Admin\AppData\Local\Temp\cf56059ae5d477487f8605c5301ceca1.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2264
- 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:2748
- - 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:2768

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

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\Temp\CabE428.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
902KB

MD5
f6da829e35db4d389f5fd098be9e391d

SHA1
09977b405dd753157cd808c3b7f42f253cd99a06

SHA256
ff5cf817e3a0e35239ef49cccc98dc8faf8660249346e5e4938df613e836d578

SHA512
3daf0c8bbe66016943b5099caa12ca393ec601ae1b297250fc09207e679be2a5ac9051efce91582d9bab0f828e9ff259337bccfb65aef97c01b9daed7e3abd95

Download Submit
memory/2264-2-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2264-10-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2264-11-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2264-23-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2264-30-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2264-1-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2264-0-0x00000000741C1000-0x00000000741C2000-memory.dmp

Filesize
4KB

Download
memory/2748-57-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-31-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-39-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-40-0x00000000741C0000-0x000000007476B000-memory.dmp

Filesize
5.7MB

Download
memory/2768-41-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-46-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2768-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-51-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-55-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-52-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-48-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-56-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-58-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2768-61-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download