remcos | 12ff63af0a27200b512b2fb73d0086cae611b557b4eeb3fb5b630cac9607fb7d

Analysis

max time kernel
30s
max time network
34s
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 01:49

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

TAX DOCUMENTS 2/g2m.dll
Size

100.0MB
MD5

fdd7fab01cc9eb7349f24ef1dbd60721
SHA1

b749ad4a425671627562fba3a956672287ea0ac2
SHA256

5b56f1de607f06430e1207d3d4cb2f9f353be1958f48c95a55d7ce5fe1535e67
SHA512

3ccba57756e93c1ca8acc4bdace284831af299b227bc7f3f825bf193acf0bbcc8d3f382c5f497e3d167c42f69e241c3cffc0066851ca078bcc201fa5b56a47fa
SSDEEP

196608:r8u0ivGTAslgbSYBsnBho/wnBvq+4rMOblxz6qYFS1qY2aubxi58/EUxFFVszp:r8uzvfaEog+4rdbUTFVk

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-24AV61
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-1-5-21-275798769-4264537674-1142822080-1000\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:

regsvr32.exe

description pid process target process

PID 468 set thread context of 1036 468 regsvr32.exe regsvr32.exe

description	pid	process	target process
PID 468 set thread context of 1036	468	regsvr32.exe	regsvr32.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

regsvr32.exeregsvr32.execmd.exe

description	pid	process	target process
PID 2744 wrote to memory of 468	2744	regsvr32.exe	regsvr32.exe
PID 2744 wrote to memory of 468	2744	regsvr32.exe	regsvr32.exe
PID 2744 wrote to memory of 468	2744	regsvr32.exe	regsvr32.exe
PID 468 wrote to memory of 1052	468	regsvr32.exe	cmd.exe
PID 468 wrote to memory of 1052	468	regsvr32.exe	cmd.exe
PID 468 wrote to memory of 1052	468	regsvr32.exe	cmd.exe
PID 468 wrote to memory of 1036	468	regsvr32.exe	regsvr32.exe
PID 468 wrote to memory of 1036	468	regsvr32.exe	regsvr32.exe
PID 468 wrote to memory of 1036	468	regsvr32.exe	regsvr32.exe
PID 468 wrote to memory of 1036	468	regsvr32.exe	regsvr32.exe
PID 468 wrote to memory of 1036	468	regsvr32.exe	regsvr32.exe
PID 1052 wrote to memory of 4908	1052	cmd.exe	reg.exe
PID 1052 wrote to memory of 4908	1052	cmd.exe	reg.exe
PID 1052 wrote to memory of 4908	1052	cmd.exe	reg.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\TAX DOCUMENTS 2\g2m.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:2744

C:\Windows\SysWOW64\regsvr32.exe
/s "C:\Users\Admin\AppData\Local\Temp\TAX DOCUMENTS 2\g2m.dll"
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:468

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
3⤵
- Suspicious use of WriteProcessMemory
PID:1052

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
4⤵
- Adds Run key to start application
PID:4908

C:\Windows\SysWOW64\regsvr32.exe
"C:\Windows\SysWOW64\regsvr32.exe"
3⤵
PID:1036

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/468-5-0x0000000010000000-0x0000000010F94000-memory.dmp

Filesize
15.6MB

Download
memory/468-1-0x0000000010000000-0x0000000010F94000-memory.dmp

Filesize
15.6MB

Download
memory/468-2-0x0000000010000000-0x0000000010F94000-memory.dmp

Filesize
15.6MB

Download
memory/468-0-0x0000000010000000-0x0000000010F94000-memory.dmp

Filesize
15.6MB

Download
memory/1036-6-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-4-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-3-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-8-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-9-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-10-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-11-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-12-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-13-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-16-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download
memory/1036-17-0x0000000000700000-0x0000000000782000-memory.dmp

Filesize
520KB

Download