remcos | b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
28-08-2024 02:44

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
22	2200	WScript.exe
25	2200	WScript.exe
28	2200	WScript.exe
30	2200	WScript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
1392	powershell.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
Key value queried	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Control Panel\International\Geo\Nation	WScript.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 4 IoCs

pid	Process
2296	remencryp.exe
5108	remcos_a.exe
3304	remencryp.exe
3200	REMJNBHGBVDFC.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2296 set thread context of 3304	2296	remencryp.exe	92

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 8 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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
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	remencryp.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	REMJNBHGBVDFC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000_Classes\Local Settings	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1392	powershell.exe
1392	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2296	remencryp.exe
Token: SeDebugPrivilege	1392	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5108	remcos_a.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 2820 wrote to memory of 4368	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	86
PID 2820 wrote to memory of 4368	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	86
PID 2820 wrote to memory of 4368	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	86
PID 2820 wrote to memory of 2200	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	87
PID 2820 wrote to memory of 2200	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	87
PID 2820 wrote to memory of 2200	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	87
PID 2820 wrote to memory of 2296	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	88
PID 2820 wrote to memory of 2296	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	88
PID 2820 wrote to memory of 2296	2820	b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe	88
PID 4368 wrote to memory of 5108	4368	WScript.exe	90
PID 4368 wrote to memory of 5108	4368	WScript.exe	90
PID 4368 wrote to memory of 5108	4368	WScript.exe	90
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2296 wrote to memory of 3304	2296	remencryp.exe	92
PID 2200 wrote to memory of 1392	2200	WScript.exe	98
PID 2200 wrote to memory of 1392	2200	WScript.exe	98
PID 2200 wrote to memory of 1392	2200	WScript.exe	98
PID 1392 wrote to memory of 3200	1392	powershell.exe	101
PID 1392 wrote to memory of 3200	1392	powershell.exe	101
PID 1392 wrote to memory of 3200	1392	powershell.exe	101

C:\Users\Admin\AppData\Local\Temp\b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe
"C:\Users\Admin\AppData\Local\Temp\b242dea1f8658786e7989e8a2ecb65e652167b3077fd9ecd20642e9917adc666.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2820
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\MyProcess\ascdfv.js"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4368
- - 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:5108
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\MyProcess\REM.vbs"
  2⤵
  - Blocklisted process makes network request
  - Checks computer location settings
  - Drops startup file
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2200
- - 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
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1392
  - - C:\Users\Admin\AppData\Roaming\REMJNBHGBVDFC.exe
      "C:\Users\Admin\AppData\Roaming\REMJNBHGBVDFC.exe" exit
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:3200
- C:\MyProcess\remencryp.exe
  "C:\MyProcess\remencryp.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2296
- - C:\MyProcess\remencryp.exe
    "C:\MyProcess\remencryp.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3304

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

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

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:\MyProcess\remencryp.exe

Filesize
604KB

MD5
fbcf58f9ce64d200379298fcd87aa56b

SHA1
74388b7d29b042a1dabfeda00066eda76a9cf348

SHA256
303e415db0644366a316524070b046b1b2a5dd2441258d6295859abc74f352ff

SHA512
3873f23e8a350b812f7edb6770cc625604a877d658453ddd4f4a84b975d88dbbfb19c071a1f089eeb21fb524edd8bdd395aa5e8b484b87ce29480e9ca39e32df

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

Filesize
144B

MD5
416b4c4215e9ad7ef31d85cebaf78482

SHA1
f0aba96394da46efff7355c9b0c448e7e86a5de4

SHA256
8ef6beb1bd8601de9461cf6bfe3b93d7629cde1dc81d9241f9ae05837b8bdce6

SHA512
a3d2476f79fdc82a16e710fffe25f65fb8d04b97acb50b30252cbf53bd617c48f4e0f4b601387ebe191eacf03073eb391a7bea6a717645b46877156ff381d645

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ws3urjae.tqu.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
483KB

MD5
b0a4175cd9541a154e82efe59daa2b05

SHA1
e9ccf2c17da8b0fc2690a5cad0f8067de577b49d

SHA256
d6f030194295bdec3c4ec91fbaf7dacd7a9b83edb99c4fd6556eb4eb7d948840

SHA512
5f805e6c9be95936d1a78ac58a988dc700f7ae81429edcc46d63f39a056ab756e4ff0f11dcbe74e8ee21c62510b724a9ede9e9b5306bf8948046ee3f0575abdb

Download Submit
memory/1392-75-0x0000000006110000-0x0000000006132000-memory.dmp

Filesize
136KB

Download
memory/1392-74-0x00000000060C0000-0x00000000060DA000-memory.dmp

Filesize
104KB

Download
memory/1392-73-0x0000000006140000-0x00000000061D6000-memory.dmp

Filesize
600KB

Download
memory/1392-72-0x0000000005C10000-0x0000000005C5C000-memory.dmp

Filesize
304KB

Download
memory/1392-71-0x0000000005BC0000-0x0000000005BDE000-memory.dmp

Filesize
120KB

Download
memory/1392-70-0x00000000055D0000-0x0000000005924000-memory.dmp

Filesize
3.3MB

Download
memory/1392-58-0x0000000004D20000-0x0000000004D42000-memory.dmp

Filesize
136KB

Download
memory/1392-60-0x0000000005560000-0x00000000055C6000-memory.dmp

Filesize
408KB

Download
memory/1392-56-0x0000000004600000-0x0000000004636000-memory.dmp

Filesize
216KB

Download
memory/1392-57-0x0000000004DD0000-0x00000000053F8000-memory.dmp

Filesize
6.2MB

Download
memory/1392-59-0x00000000054F0000-0x0000000005556000-memory.dmp

Filesize
408KB

Download
memory/2296-32-0x0000000005760000-0x00000000057F2000-memory.dmp

Filesize
584KB

Download
memory/2296-36-0x0000000005910000-0x000000000591A000-memory.dmp

Filesize
40KB

Download
memory/2296-35-0x0000000005B60000-0x0000000005BFC000-memory.dmp

Filesize
624KB

Download
memory/2296-34-0x0000000005900000-0x000000000590A000-memory.dmp

Filesize
40KB

Download
memory/2296-33-0x0000000005800000-0x0000000005896000-memory.dmp

Filesize
600KB

Download
memory/2296-31-0x0000000005C30000-0x00000000061D4000-memory.dmp

Filesize
5.6MB

Download
memory/2296-30-0x0000000000E00000-0x0000000000E9C000-memory.dmp

Filesize
624KB

Download
memory/3304-39-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3304-41-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3304-37-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download