remcos | c890802b9bd6319c752eeea4a97e6050483ac466ea553c6c83689f86c9614743

Analysis

max time kernel
148s
max time network
147s
platform
windows11-21h2_x64
resource
win11-20250502-en
resource tags

arch:x64arch:x86image:win11-20250502-enlocale:en-usos:windows11-21h2-x64system
submitted
07/06/2025, 12:57

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General

Target
3171924_PO_001.js
Size 829KB
Sample250607-p64lbsssgw
SHA256 c890802b9bd6319c752eeea4a97e6050483ac466ea553c6c83689f86c9614743
MD5 de1e7aad7cd990692c2076ea621be63c
SHA1 d496d48bcbcf985773ba6ffa904c48d4af7264d3
SHA512 206f414e4cda3f8d2bd3b6e97fca607f2c2bb24828e623f19bb29cbc8fd44b17234399e2e32c5130d442cd8cb2391b7e61747991c9db2353e368648e19ba459c
SSDEEP 24576:Xkv7R0O71/v1ohrYwp3ENtP8glaua2QzPcfw2:Xw7N0Mo/gfw2
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

164.68.116.238:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-BGRWGL
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
Remcos family
remcos

Executes dropped EXE 3 IoCs

pid	Process
4580	x.exe
4916	x.exe
4932	x.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4580 set thread context of 4932	4580	x.exe	83

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 2 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	x.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	x.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4580	x.exe
4580	x.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4580	x.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 4580	2112	wscript.exe	80
PID 2112 wrote to memory of 4580	2112	wscript.exe	80
PID 2112 wrote to memory of 4580	2112	wscript.exe	80
PID 4580 wrote to memory of 4916	4580	x.exe	82
PID 4580 wrote to memory of 4916	4580	x.exe	82
PID 4580 wrote to memory of 4916	4580	x.exe	82
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83
PID 4580 wrote to memory of 4932	4580	x.exe	83

C:\Windows\system32\wscript.exe
wscript.exe C:\Users\Admin\AppData\Local\Temp\3171924_PO_001.js
1⤵
- Suspicious use of WriteProcessMemory
PID:2112
- C:\Users\Admin\AppData\Local\Temp\x.exe
  "C:\Users\Admin\AppData\Local\Temp\x.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:4580
- - C:\Users\Admin\AppData\Local\Temp\x.exe
    "C:\Users\Admin\AppData\Local\Temp\x.exe"
    3⤵
    - Executes dropped EXE
    PID:4916
- - C:\Users\Admin\AppData\Local\Temp\x.exe
    "C:\Users\Admin\AppData\Local\Temp\x.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4932

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

JavaScript

T1059.007

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

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Downloads

x.exe

Path C:\Users\Admin\AppData\Local\Temp\x.exe
Size 621KB
SHA256 347a97299feb71d487d971d2bf7b151ead33d5b5779a4afef4730a109a6d8868
MD5 e2a6bafb9cd12b96fa88ae9f779f7a4a
SHA1 5a62e6d572c519d77b50fd1f4bb2d1bdc2a70162
SHA512 9a75602196704ec361b054c3fdaf9a9b05211d71e3c19a89ccda4665a5d16532f232b8509d72766498d0ddf672a6d5c35dd2ed0f5beef2854cf68a54809c138a
SSDEEP 12288:p5YlToi6LZjCaiRNHtqBFBArlOiRZAL2bLzSbb31KqK0j:Ek5ZjPI0jBABOmAL2bXO31Kz0
MD5 SHA1 SHA512 SSDEEP

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memory/4580-28-0x0000000074C50000-0x0000000075401000-memory.dmp

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memory/4580-11-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

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memory/4580-12-0x0000000000CC0000-0x0000000000D64000-memory.dmp

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memory/4580-13-0x0000000005900000-0x000000000599C000-memory.dmp

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memory/4580-14-0x0000000005F50000-0x00000000064F6000-memory.dmp

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memory/4580-15-0x0000000074C5E000-0x0000000074C5F000-memory.dmp

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memory/4580-16-0x0000000005BA0000-0x0000000005C2C000-memory.dmp

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memory/4580-17-0x0000000074C50000-0x0000000075401000-memory.dmp

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memory/4580-18-0x00000000057E0000-0x00000000057F4000-memory.dmp

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memory/4932-27-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-34-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-25-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-22-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-20-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-26-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-29-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-30-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-31-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-24-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-36-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-35-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-37-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-38-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-39-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-40-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-41-0x0000000000400000-0x0000000000481000-memory.dmp

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memory/4932-42-0x0000000000400000-0x0000000000481000-memory.dmp

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