remcos | 437c785b2093ffb955f17d63758cfb10e741509415cc55de8050e2d918716a4a

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
19-11-2024 14:57

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

build.exe
Size

1.6MB
MD5

0a8711fa1cb4189ab364c217db5f3620
SHA1

94ee709ab608d9d4ed6143a1deae85dd9fd812b3
SHA256

437c785b2093ffb955f17d63758cfb10e741509415cc55de8050e2d918716a4a
SHA512

8176f9534103704ef3b28ed2c5ab5f79cc7a19ee535017a763727b365d7825d3bb2ddf9a9fc3eae13eac4e3cfa95ce6887362d564db2c0440d0dab5cfdb1ebab
SSDEEP

24576:Y/WWf67etHLvLdh+dLNuK5imSFRWct3BfA59jACSr6ggTan9mTYdGvhH0WygS:Uf66tXdh+147YcXIfUCc6bG9DgS

Score

10^/10

remcos mouse discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

mouse

oportunidad-escolombiasegura.cfd:3020

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
registros.dat
keylog_flag
false
keylog_folder
registro
mouse_option
false
mutex
ladsjalfhfzmvqpowieyr-3PLE3H
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
Remcos family
remcos
Downloads MZ/PE file

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

build.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\QuickTextPaste = "C:\\Users\\Admin\\Pictures\\QuickTextPaste\\Bin\\QuickTextPaste.exe"	build.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

build.execsc.exe

description pid process target process

PID 3268 set thread context of 2264 3268 build.exe csc.exe
PID 2264 set thread context of 3964 2264 csc.exe MSBuild.exe

description	pid	process	target process
PID 3268 set thread context of 2264	3268	build.exe	csc.exe
PID 2264 set thread context of 3964	2264	csc.exe	MSBuild.exe

System Location Discovery: System Language Discovery 1 TTPs 3 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

Processes:

build.execsc.exeMSBuild.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	build.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

csc.exe

pid process

2264 csc.exe
2264 csc.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

csc.exe

description pid process

Token: SeDebugPrivilege 2264 csc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

MSBuild.exe

pid process

3964 MSBuild.exe

pid	process
2264	csc.exe
2264	csc.exe

description	pid	process
Token: SeDebugPrivilege	2264	csc.exe

pid	process
3964	MSBuild.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

build.execsc.exe

description	pid	process	target process
PID 3268 wrote to memory of 2264	3268	build.exe	csc.exe
PID 3268 wrote to memory of 2264	3268	build.exe	csc.exe
PID 3268 wrote to memory of 2264	3268	build.exe	csc.exe
PID 3268 wrote to memory of 2264	3268	build.exe	csc.exe
PID 3268 wrote to memory of 2264	3268	build.exe	csc.exe
PID 2264 wrote to memory of 2268	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 2268	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 2268	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe
PID 2264 wrote to memory of 3964	2264	csc.exe	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\build.exe
"C:\Users\Admin\AppData\Local\Temp\build.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3268
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe"
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2264
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    3⤵
    PID:2268
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:3964

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

Loading Replay Monitor...

Downloads

C:\ProgramData\registro\registros.dat

Filesize
184B

MD5
19f40e3d70fe3838c37bea7399fb1e76

SHA1
2223f9b2244156b15acb48eb0c442d5dde7f91ca

SHA256
43f7dfeb5962346b0af5201d8155d713d425d4df657be7c48173edcfafc7fe13

SHA512
f5c06ae9e35c69105c0444b75a27a9d8a62162846f210374a59b4bfd57bc6e1aff276588f6e6406cf48161fd683a9617d3e61973647a57512a85808c0b676b8f

Download Submit
memory/2264-42-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-58-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-40-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-24-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-38-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-10-0x000000007425E000-0x000000007425F000-memory.dmp

Filesize
4KB

Download
memory/2264-3921-0x0000000005980000-0x00000000059D4000-memory.dmp

Filesize
336KB

Download
memory/2264-3920-0x0000000074250000-0x0000000074A00000-memory.dmp

Filesize
7.7MB

Download
memory/2264-3919-0x0000000005300000-0x0000000005366000-memory.dmp

Filesize
408KB

Download
memory/2264-22-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-62-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-68-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-66-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-64-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-60-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-36-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-54-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-52-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-50-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-3847-0x000000007425E000-0x000000007425F000-memory.dmp

Filesize
4KB

Download
memory/2264-48-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-46-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-45-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-7-0x0000000000720000-0x00000000007C4000-memory.dmp

Filesize
656KB

Download
memory/2264-11-0x0000000074250000-0x0000000074A00000-memory.dmp

Filesize
7.7MB

Download
memory/2264-12-0x0000000004F90000-0x0000000005064000-memory.dmp

Filesize
848KB

Download
memory/2264-56-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-34-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-32-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-30-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-28-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-26-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-20-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-18-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-16-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-14-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-13-0x0000000004F90000-0x000000000505E000-memory.dmp

Filesize
824KB

Download
memory/2264-3918-0x0000000005240000-0x000000000528C000-memory.dmp

Filesize
304KB

Download
memory/2264-3917-0x00000000051E0000-0x0000000005236000-memory.dmp

Filesize
344KB

Download
memory/3268-1-0x0000000000407000-0x0000000000420000-memory.dmp

Filesize
100KB

Download
memory/3268-1044-0x0000000000407000-0x0000000000420000-memory.dmp

Filesize
100KB

Download
memory/3268-2-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3268-9-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3268-8-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3268-5-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3268-6-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3268-3-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3268-0-0x0000000000400000-0x00000000005C0000-memory.dmp

Filesize
1.8MB

Download
memory/3964-3925-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3964-3938-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download