remcos | 5a98e027413c17a092d04b5336448316b0933e5cfd0dac15c3dc2097d854f807

Analysis

max time kernel
29s
max time network
35s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
12-04-2024 02:16

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General

Target

MY 2023 TAX ORGANIZER_PDF.exe
Size

39KB
MD5

f1b14f71252de9ac763dbfbfbfc8c2dc
SHA1

dcc2dcb26c1649887f1d5ae557a000b5fe34bb98
SHA256

796ea1d27ed5825e300c3c9505a87b2445886623235f3e41258de90ba1604cd5
SHA512

636a32fb8a88a542783aa57fe047b6bca47b2bd23b41b3902671c4e9036c6dbb97576be27fd2395a988653e6b63714277873e077519b4a06cdc5f63d3c4224e0
SSDEEP

768:YRQnUhG5bZDOTpkdD82YbQkRFokFWIILPUh:FWObZDOTpk5T6zqAh

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

193.142.146.21:2404

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-WNCE10
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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\VIVA_01.dll,EntryPoint"	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

MY 2023 TAX ORGANIZER_PDF.exe

description pid process target process

PID 4976 set thread context of 3136 4976 MY 2023 TAX ORGANIZER_PDF.exe MY 2023 TAX ORGANIZER_PDF.exe

description	pid	process	target process
PID 4976 set thread context of 3136	4976	MY 2023 TAX ORGANIZER_PDF.exe	MY 2023 TAX ORGANIZER_PDF.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

MY 2023 TAX ORGANIZER_PDF.execmd.exe

description	pid	process	target process
PID 4976 wrote to memory of 872	4976	MY 2023 TAX ORGANIZER_PDF.exe	cmd.exe
PID 4976 wrote to memory of 872	4976	MY 2023 TAX ORGANIZER_PDF.exe	cmd.exe
PID 4976 wrote to memory of 872	4976	MY 2023 TAX ORGANIZER_PDF.exe	cmd.exe
PID 4976 wrote to memory of 3136	4976	MY 2023 TAX ORGANIZER_PDF.exe	MY 2023 TAX ORGANIZER_PDF.exe
PID 4976 wrote to memory of 3136	4976	MY 2023 TAX ORGANIZER_PDF.exe	MY 2023 TAX ORGANIZER_PDF.exe
PID 4976 wrote to memory of 3136	4976	MY 2023 TAX ORGANIZER_PDF.exe	MY 2023 TAX ORGANIZER_PDF.exe
PID 4976 wrote to memory of 3136	4976	MY 2023 TAX ORGANIZER_PDF.exe	MY 2023 TAX ORGANIZER_PDF.exe
PID 4976 wrote to memory of 3136	4976	MY 2023 TAX ORGANIZER_PDF.exe	MY 2023 TAX ORGANIZER_PDF.exe
PID 872 wrote to memory of 4100	872	cmd.exe	reg.exe
PID 872 wrote to memory of 4100	872	cmd.exe	reg.exe
PID 872 wrote to memory of 4100	872	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\MY 2023 TAX ORGANIZER_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\MY 2023 TAX ORGANIZER_PDF.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4976

C:\Windows\SysWOW64\cmd.exe
cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\VIVA_01.dll",EntryPoint /f & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:872

C:\Windows\SysWOW64\reg.exe
reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*Chrome" /t REG_SZ /d "rundll32.exe C:\Users\Admin\AppData\Roaming\VIVA_01.dll",EntryPoint /f
3⤵
- Adds Run key to start application
PID:4100

C:\Users\Admin\AppData\Local\Temp\MY 2023 TAX ORGANIZER_PDF.exe
"C:\Users\Admin\AppData\Local\Temp\MY 2023 TAX ORGANIZER_PDF.exe"
2⤵
PID:3136

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/3136-5-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-3-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-6-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-9-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-10-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-11-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-12-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/3136-13-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4976-0-0x0000000010000000-0x0000000010F8F000-memory.dmp

Filesize
15.6MB

Download
memory/4976-1-0x0000000010000000-0x0000000010F8F000-memory.dmp

Filesize
15.6MB

Download
memory/4976-4-0x0000000010000000-0x0000000010F8F000-memory.dmp

Filesize
15.6MB

Download
memory/4976-7-0x0000000010000000-0x0000000010F8F000-memory.dmp

Filesize
15.6MB

Download