remcos | a23fdeddb683f716be744ef3fe9a8ce2c87b02f5e5c1f6c8bdb70881de528304

Analysis

max time kernel
139s
max time network
154s
platform
windows7_x64
resource
win7-20241023-en
resource tags

arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
submitted
22/03/2025, 06:16

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General

Target

cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
Size

1.8MB
MD5

dc3e79dfedf92a612126b15d8f7c2689
SHA1

0e263e234e10b2064c7f567a8712272968ed9a59
SHA256

cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9
SHA512

b1f0d3c929e61eb10affb637b1f4740dcf058c1ac0b71059112acd9f4689c208153140fb2342d7b08a92251e3613e775d768bd1aa11238d21b66fa2d11baf673
SSDEEP

24576:ID39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6Y:IF+QrFUBgq25eKu6Y

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
2940	sbietrcl.exe
3016	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.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-1-5-21-1163522206-1469769407-485553996-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2940 set thread context of 3016	2940	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	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.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
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
2940	sbietrcl.exe
2940	sbietrcl.exe
2940	sbietrcl.exe
2940	sbietrcl.exe
2940	sbietrcl.exe
2940	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
Token: SeDebugPrivilege	2940	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3016	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2596 wrote to memory of 2940	2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	31
PID 2596 wrote to memory of 2940	2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	31
PID 2596 wrote to memory of 2940	2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	31
PID 2596 wrote to memory of 2940	2596	cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe	31
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32
PID 2940 wrote to memory of 3016	2940	sbietrcl.exe	32

C:\Users\Admin\AppData\Local\Temp\cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.exe
"C:\Users\Admin\AppData\Local\Temp\cf450b1869e9064758b27a7df84b5117a9bdc5e448a47f5170904649fa7fefe9.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:2596
- 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:2940
- - 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:3016

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\CabD52A.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

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

Filesize
1.9MB

MD5
1e2e4f8e4be3f2a5db05bbe9f28f7247

SHA1
5c0d56a3020a5040fd03c0ac89af3de5176ded18

SHA256
9d61fd53ce8c6e39c931dca0afb33b6e433c198199a8ae342beb40be27ca0904

SHA512
57e8d3eb7911d13af6b0769ea476d1114a49e3096a8b75afeed7b7d5cafc2f8ea2792a387c171d360d0b97a51ef00d299ade7b7863906f7f5d0ae3f7d7b227a6

Download Submit
memory/2596-0-0x00000000747E1000-0x00000000747E2000-memory.dmp

Filesize
4KB

Download
memory/2596-1-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2596-9-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2596-10-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2596-28-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2940-29-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2940-37-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2940-38-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/2940-55-0x00000000747E0000-0x0000000074D8B000-memory.dmp

Filesize
5.7MB

Download
memory/3016-47-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-51-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-41-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-49-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3016-60-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-59-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-56-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-54-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-61-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3016-64-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download