remcos | b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5

General

Target

b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
Size

1.9MB
MD5

0da0e77164c09ad3dba1c49ee7440154
SHA1

61f2f7c5eaf0959c51622ebf89ea5e07e5d12f90
SHA256

b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5
SHA512

98e275667d9184cbeeb556df709bcda97f484d278ba8a6421c87a0b71b079a282e67b9c3fca01a339cf261d4d26996863581e6dc537b61a6711e923812623ff3
SSDEEP

24576:vD39dlfGQrFUspugRNJI2DJnUw9W/j+BeKJWqwH6z:vF+QrFUBgq25eKu6z

Score

10^/10

remcos host 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
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	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe

Executes dropped EXE 2 IoCs

pid	Process
4776	sbietrcl.exe
4832	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"	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4776 set thread context of 4832	4776	sbietrcl.exe	96

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	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.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
4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
4776	sbietrcl.exe
4776	sbietrcl.exe
4776	sbietrcl.exe
4776	sbietrcl.exe
4776	sbietrcl.exe
4776	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
Token: SeDebugPrivilege	4776	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4832	sbietrcl.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 4776	4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe	94
PID 4064 wrote to memory of 4776	4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe	94
PID 4064 wrote to memory of 4776	4064	b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe	94
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96
PID 4776 wrote to memory of 4832	4776	sbietrcl.exe	96

C:\Users\Admin\AppData\Local\Temp\b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.exe
"C:\Users\Admin\AppData\Local\Temp\b40deefc4ca51f2995419de278a49f77ff9979b51088bc393ae1fcebc5abfef5.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:4064
- 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:4776
- - 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:4832

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
1.9MB

MD5
677fc7eeaf03128bbf4377f677c10446

SHA1
5f7cceb467a62583b64a9dc6445d253984332135

SHA256
391b121e9e8615de5696b86f27d250c35e685f8a08ebf27f0242eef9e5ac6976

SHA512
dfab572fa693d1d78fa9fd1ddee2a11afeeb2e51ed6aacd6fc70415656296cbea1f32c8e3835ceb36e744406508f883f30b29a5932eb24ed7a9243b06e8fc95e

Download Submit
memory/4064-0-0x0000000074F32000-0x0000000074F33000-memory.dmp

Filesize
4KB

Download
memory/4064-1-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4064-2-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4064-5-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4064-6-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4064-18-0x0000000074F32000-0x0000000074F33000-memory.dmp

Filesize
4KB

Download
memory/4064-19-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4064-30-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4776-32-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4776-31-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4776-33-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4776-34-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4776-46-0x0000000074F30000-0x00000000754E1000-memory.dmp

Filesize
5.7MB

Download
memory/4832-35-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4832-38-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4832-40-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4832-44-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4832-43-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4832-45-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/4832-49-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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