remcos | b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666

Analysis

max time kernel
148s
max time network
144s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
28-08-2024 02:44

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General

Target

b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
Size

1.2MB
MD5

68306ab0d9af78095917a7d3a71cb955
SHA1

e83aba5a90e4f3033661848ebbc5bfc9776306d0
SHA256

b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666
SHA512

f084db81e15d8587f2cd97af544de9bab65cd5318e4fff29d636ea291286525f3cd5ef26f197b16ee12e4f8a357db50d2e7588c6fbc8a35aa3d6604897094511
SSDEEP

24576:DBkVdlYAQpTFVWzKAqgzVDvwbwLnLNz567iJVG6zgy:lsvIWzigzVDzhJj9gy

Score

10^/10

remcos remotehost12 discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost12

rem24251mr.duckdns.org:24251

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-P0KZ2Q
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Blocklisted process makes network request 4 IoCs

flow	pid	Process
6	2716	WScript.exe
9	2716	WScript.exe
11	2716	WScript.exe
13	2716	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2160	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oozoqzoqzp.vbs	WScript.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\oozoqzoqzp.vbs	WScript.exe

Executes dropped EXE 4 IoCs

pid	Process
2876	remencryp.exe
2016	remcos_a.exe
1116	remencryp.exe
2520	REMJNBHGBVDFC.exe

Loads dropped DLL 9 IoCs

pid	Process
1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
1412	WScript.exe
1412	WScript.exe
2876	remencryp.exe
2160	powershell.exe
2160	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2876 set thread context of 1116	2876	remencryp.exe	34

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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 6 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	remencryp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos_a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2160	powershell.exe
2160	powershell.exe
2160	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2876	remencryp.exe
Token: SeDebugPrivilege	2160	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2016	remcos_a.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1628 wrote to memory of 1412	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	30
PID 1628 wrote to memory of 1412	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	30
PID 1628 wrote to memory of 1412	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	30
PID 1628 wrote to memory of 1412	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	30
PID 1628 wrote to memory of 2716	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	31
PID 1628 wrote to memory of 2716	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	31
PID 1628 wrote to memory of 2716	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	31
PID 1628 wrote to memory of 2716	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	31
PID 1628 wrote to memory of 2876	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	32
PID 1628 wrote to memory of 2876	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	32
PID 1628 wrote to memory of 2876	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	32
PID 1628 wrote to memory of 2876	1628	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	32
PID 1412 wrote to memory of 2016	1412	WScript.exe	33
PID 1412 wrote to memory of 2016	1412	WScript.exe	33
PID 1412 wrote to memory of 2016	1412	WScript.exe	33
PID 1412 wrote to memory of 2016	1412	WScript.exe	33
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2876 wrote to memory of 1116	2876	remencryp.exe	34
PID 2716 wrote to memory of 2160	2716	WScript.exe	37
PID 2716 wrote to memory of 2160	2716	WScript.exe	37
PID 2716 wrote to memory of 2160	2716	WScript.exe	37
PID 2716 wrote to memory of 2160	2716	WScript.exe	37
PID 2160 wrote to memory of 2520	2160	powershell.exe	39
PID 2160 wrote to memory of 2520	2160	powershell.exe	39
PID 2160 wrote to memory of 2520	2160	powershell.exe	39
PID 2160 wrote to memory of 2520	2160	powershell.exe	39

C:\Users\Admin\AppData\Local\Temp\b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
"C:\Users\Admin\AppData\Local\Temp\b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1628
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\MyProcess\ascdfv.js"
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1412
- - C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
    "C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:2016
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\MyProcess\REM.vbs"
  2⤵
  - Blocklisted process makes network request
  - Drops startup file
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2716
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -executionpolicy bypass -WindowStyle Hidden -command Start-Process 'C:\Users\Admin\AppData\Roaming\REMJNBHGBVDFC.exe' exit
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2160
  - - C:\Users\Admin\AppData\Roaming\REMJNBHGBVDFC.exe
      "C:\Users\Admin\AppData\Roaming\REMJNBHGBVDFC.exe" exit
      4⤵
      Executes dropped EXE
      PID:2520
- C:\MyProcess\remencryp.exe
  "C:\MyProcess\remencryp.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2876
- - C:\MyProcess\remencryp.exe
    "C:\MyProcess\remencryp.exe"
    3⤵
    - Executes dropped EXE
    PID:1116

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\MyProcess\REM.vbs

Filesize
64KB

MD5
ffab60b54877eba5219e9ace88003e06

SHA1
6401355bf2ceaf825aea9f56e78a7f5be0c6b37a

SHA256
794fea30a1ba942d3fad6982f81983623cb36ceb4cbfc4f6666e83db32ecee1a

SHA512
05201d116a0e273870db463f0bfb650a36b9a7cac96ad39a013c7f505b8daf2365c0cbe3af707fef4beeff5d3450293266539055b7a8cd9b6b6b794202fc06a2

Download Submit
C:\MyProcess\ascdfv.js

Filesize
644KB

MD5
87609dfc36ac35f80b4da54f9535a88d

SHA1
ea758f9300ed0ec915c287780ffed084c7ea5943

SHA256
e866e382495c91465128b284807c321d188a1ca79dd69f48b626901a3bd75b1e

SHA512
1fe8fa6b3162ffeb5b1b3623d38dc2b432012ff4b187197e820a66dd88338003382711feb04295dea835109bed3d981bc641edb20bafdc3786f41bfce118c7ba

Download Submit
C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
bcf645b5273dccdfdcf3af3a5106d59e

SHA1
1232fc8d689e86e9755875816cdd25baa43cefb0

SHA256
2a47b318ad3f6a0064e61782a14c37e86bbac8d8f5f19cddff73b5e7259a7f23

SHA512
42ac5d1d759924ebc231bc0518a13b587064b41caaa55549a303fb048cfdccf78e37865ba78e6e04e51216e68baf84b13990e3b0510d29e428a268f27c2c5879

Download Submit
\MyProcess\remencryp.exe

Filesize
604KB

MD5
fbcf58f9ce64d200379298fcd87aa56b

SHA1
74388b7d29b042a1dabfeda00066eda76a9cf348

SHA256
303e415db0644366a316524070b046b1b2a5dd2441258d6295859abc74f352ff

SHA512
3873f23e8a350b812f7edb6770cc625604a877d658453ddd4f4a84b975d88dbbfb19c071a1f089eeb21fb524edd8bdd395aa5e8b484b87ce29480e9ca39e32df

Download Submit
\Users\Admin\AppData\Local\Temp\remcos_a.exe

Filesize
483KB

MD5
b0a4175cd9541a154e82efe59daa2b05

SHA1
e9ccf2c17da8b0fc2690a5cad0f8067de577b49d

SHA256
d6f030194295bdec3c4ec91fbaf7dacd7a9b83edb99c4fd6556eb4eb7d948840

SHA512
5f805e6c9be95936d1a78ac58a988dc700f7ae81429edcc46d63f39a056ab756e4ff0f11dcbe74e8ee21c62510b724a9ede9e9b5306bf8948046ee3f0575abdb

Download Submit
memory/1116-58-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-56-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-55-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1116-53-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-43-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1116-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2876-37-0x0000000000800000-0x000000000080A000-memory.dmp

Filesize
40KB

Download
memory/2876-36-0x0000000004B30000-0x0000000004BC6000-memory.dmp

Filesize
600KB

Download
memory/2876-27-0x0000000000900000-0x000000000099C000-memory.dmp

Filesize
624KB

Download