remcos | 235c409078989a2f92acbdb46537f6cfa51d6e1331b567301fad7252362049ed

General

Target

dcfdefb8ba2f1433af30f3010a92aed0N.exe
Size

2.0MB
MD5

dcfdefb8ba2f1433af30f3010a92aed0
SHA1

c61f474c4c3b80d140df0ef085e0fcd1f995d286
SHA256

235c409078989a2f92acbdb46537f6cfa51d6e1331b567301fad7252362049ed
SHA512

8cf29e6684dc72e682ede92dd5c2144596b310889c29093486be2a9563462aa9eb6dad2631c3dac2ad198b0e30d0a30b7a3dd9b5d41c7a5d680b917f089a0e9b
SSDEEP

24576:aD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPjYFES7ZiimZL:ap7E+QrFUBgq2a+

Score

10^/10

remcos host credential_access discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

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-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation	dcfdefb8ba2f1433af30f3010a92aed0N.exe

Executes dropped EXE 2 IoCs

pid	Process
3572	sbietrcl.exe
1564	sbietrcl.exe

Reads user/profile data of web browsers 2 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

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-1-5-21-4182098368-2521458979-3782681353-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	dcfdefb8ba2f1433af30f3010a92aed0N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3572 set thread context of 1564	3572	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 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	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dcfdefb8ba2f1433af30f3010a92aed0N.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
3572	sbietrcl.exe
3572	sbietrcl.exe
3572	sbietrcl.exe
3572	sbietrcl.exe
3572	sbietrcl.exe
3572	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe
Token: SeDebugPrivilege	3572	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1564	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 5116 wrote to memory of 3572	5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe	92
PID 5116 wrote to memory of 3572	5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe	92
PID 5116 wrote to memory of 3572	5116	dcfdefb8ba2f1433af30f3010a92aed0N.exe	92
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95
PID 3572 wrote to memory of 1564	3572	sbietrcl.exe	95

C:\Users\Admin\AppData\Local\Temp\dcfdefb8ba2f1433af30f3010a92aed0N.exe
"C:\Users\Admin\AppData\Local\Temp\dcfdefb8ba2f1433af30f3010a92aed0N.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:5116
- 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:3572
- - 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:1564

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
2.0MB

MD5
c84f61c92899e31d7d8aed386c8aefb2

SHA1
92034cc1b3dbd95c273ea6fbc807f7961f1e68e5

SHA256
e919bd2b2f32cfc224427697cf4922891d6d5780172f11c91986f3697cd12e2c

SHA512
410b0f224a3c1e55e835c38cc02cc8dff32a4edcd3a3b364c10a2a2b7b0593410811dd00f3b19175c9c8d0a72f26cf4f5591942c4fced16d6a01d4557525771f

Download Submit
memory/1564-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1564-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1564-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1564-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1564-42-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1564-39-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1564-38-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/3572-32-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3572-31-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3572-33-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3572-34-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/3572-46-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5116-0-0x0000000074722000-0x0000000074723000-memory.dmp

Filesize
4KB

Download
memory/5116-30-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5116-19-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5116-18-0x0000000074722000-0x0000000074723000-memory.dmp

Filesize
4KB

Download
memory/5116-6-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5116-5-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5116-2-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download
memory/5116-1-0x0000000074720000-0x0000000074CD1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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