remcos | c440a63a48fde4d4f544afe9685a4902e778b5f7473b41929ee51a7ac93c4b92

Analysis

max time kernel
598s
max time network
599s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
09/06/2024, 18:08

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General

Target

test3.exe
Size

469KB
MD5

05855d9eb0995dc71519706c8d1d7a31
SHA1

4f7587e98ce910541c0a2a89f3d4216f0c8de86b
SHA256

c440a63a48fde4d4f544afe9685a4902e778b5f7473b41929ee51a7ac93c4b92
SHA512

d26611173b719a0b398319c8f473961f4c2d7f009adbf8fe5cbdb3ab80db41a554c445056d16e7dac965a19ab6428989aae9021b6ebf62134ce613ce2f662244
SSDEEP

12288:omnk7iLJbpIpiRL6I2WhSKQ9ZsfZQShn9:YiLJbpI7I2WhQqZ7h9

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

light-reasons.gl.at.ply.gg:17193

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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-6GVHP9
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Executes dropped EXE 1 IoCs

pid	Process
520	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	test3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3062789476-783164490-2318012559-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3062789476-783164490-2318012559-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	test3.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3062789476-783164490-2318012559-1000_Classes\Local Settings	test3.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4056 wrote to memory of 2468	4056	test3.exe	76
PID 4056 wrote to memory of 2468	4056	test3.exe	76
PID 4056 wrote to memory of 2468	4056	test3.exe	76
PID 2468 wrote to memory of 1224	2468	WScript.exe	77
PID 2468 wrote to memory of 1224	2468	WScript.exe	77
PID 2468 wrote to memory of 1224	2468	WScript.exe	77
PID 1224 wrote to memory of 520	1224	cmd.exe	79
PID 1224 wrote to memory of 520	1224	cmd.exe	79
PID 1224 wrote to memory of 520	1224	cmd.exe	79

C:\Users\Admin\AppData\Local\Temp\test3.exe
"C:\Users\Admin\AppData\Local\Temp\test3.exe"
1⤵
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4056
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2468
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1224
  - - C:\ProgramData\Remcos\remcos.exe
      C:\ProgramData\Remcos\remcos.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      PID:520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\ProgramData\Remcos\remcos.exe

Filesize
469KB

MD5
05855d9eb0995dc71519706c8d1d7a31

SHA1
4f7587e98ce910541c0a2a89f3d4216f0c8de86b

SHA256
c440a63a48fde4d4f544afe9685a4902e778b5f7473b41929ee51a7ac93c4b92

SHA512
d26611173b719a0b398319c8f473961f4c2d7f009adbf8fe5cbdb3ab80db41a554c445056d16e7dac965a19ab6428989aae9021b6ebf62134ce613ce2f662244

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C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
386B

MD5
1ec6289c6fd4c2ded6b2836ed28cbeb5

SHA1
c4e08195e6c640eb8860acc03fda1d649b4fe070

SHA256
6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

SHA512
20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads