remcos | 9bf18fed06c26ef88efd8e78f93dc19918dcd328b25957ccb8ef056cacf1fc3a

Analysis

max time kernel
150s
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
12-09-2024 10:53

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General

Target

DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe
Size

49KB
MD5

48f592baee50fd94dee174fc92f017d8
SHA1

8bd8ad36ccb17a83d14bdf3d3eeb7db74ab2b5a2
SHA256

9bf18fed06c26ef88efd8e78f93dc19918dcd328b25957ccb8ef056cacf1fc3a
SHA512

eac79fb91b8ef3d2ed2fe76e3b8df455ce0a845d27f75312ff07292c3996bc5490b42e5e51c99a30d23d8f1e71ae4a9315155e93dc828daa055ac92891c80254
SSDEEP

768:85BrpeJ99VwhCnQeTF4Fs5p4+2KW0s20Ui1:89eHRQeTF4A3WBVUw

Score

10^/10

remcos send discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Send

desconocido07092024.con-ip.com:1510

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
registros.dat
keylog_flag
false
keylog_folder
dato
mouse_option
false
mutex
iuyytdyrcdytvityfytsrtyr-22LTQ2
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Capturas de pantalla
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs

description	pid	Process	procid_target
PID 1476 created 3520	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	56

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-1-5-21-2718105630-359604950-2820636825-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\jjdhshse = "C:\\Users\\Admin\\AppData\\Roaming\\jjdhshse.exe"	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1476 set thread context of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101

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	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe
Token: SeDebugPrivilege	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4836	InstallUtil.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101
PID 1476 wrote to memory of 4836	1476	DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe	101

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:3520
- C:\Users\Admin\AppData\Local\Temp\DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe
  "C:\Users\Admin\AppData\Local\Temp\DOCUMENTO_GENERAL_ADJUNTADO_2024.EXE.exe"
  2⤵
  - Suspicious use of NtCreateUserProcessOtherParentProcess
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1476
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4836

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 Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\dato\registros.dat

Filesize
184B

MD5
6b619e22a728d75a0c73400f1c9eb500

SHA1
bfdd5c70b9169c21ab0c9aacaff1f3ab66900052

SHA256
92fe9ab35da5aa141ef4da39561cd654261664302bf982989bad31db2dd63bca

SHA512
bf624810445a2aba36110091ecc536af5ead673eb072ca2626c85632b18203a4e15016dd71f1a56b499ef3dea6196b9f4e06e70535f5d77a5dd9edd2214478be

Download Submit
memory/1476-0-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

Filesize
4KB

Download
memory/1476-1-0x0000000000FD0000-0x0000000000FE2000-memory.dmp

Filesize
72KB

Download
memory/1476-2-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-3-0x0000000006440000-0x000000000655E000-memory.dmp

Filesize
1.1MB

Download
memory/1476-27-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-31-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-65-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-67-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-63-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-61-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-57-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-55-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-53-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-51-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-49-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-47-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-45-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-43-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-41-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-39-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-37-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-35-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-33-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-30-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-25-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-23-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-21-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-19-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-17-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-13-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-11-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-9-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-7-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-59-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-15-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-5-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-4-0x0000000006440000-0x0000000006557000-memory.dmp

Filesize
1.1MB

Download
memory/1476-1078-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-1079-0x0000000006830000-0x00000000068C8000-memory.dmp

Filesize
608KB

Download
memory/1476-1080-0x0000000006790000-0x00000000067DC000-memory.dmp

Filesize
304KB

Download
memory/1476-1084-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-1085-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-1087-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-1086-0x0000000074E0E000-0x0000000074E0F000-memory.dmp

Filesize
4KB

Download
memory/1476-1088-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-1089-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/1476-1090-0x0000000007050000-0x00000000075F4000-memory.dmp

Filesize
5.6MB

Download
memory/1476-1091-0x0000000006380000-0x00000000063D4000-memory.dmp

Filesize
336KB

Download
memory/1476-1101-0x0000000074E00000-0x00000000755B0000-memory.dmp

Filesize
7.7MB

Download
memory/4836-1100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/4836-1105-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download