remcos | 6a5b162209ae004d9f3406fe9a6efff71388bdb2b40b377b168c17cd7e967fef

General

Target

TAX Organizer.exe
Size

31KB
MD5

3e71ed46603b02a94b921411a19b7a5c
SHA1

b1374ef6717635d07015d8acb700cf95b2a66b12
SHA256

1131f33552a12921f6f4d7d9e503feae4b12c367d5377e226acf270f6b58ca6e
SHA512

28555a8bf20e4f8d42b21685c06e429bc5261f75e9fb65b970a322907d7da4a4ee7d367f4637ea4abb6ef32fae8e71a9d92b4f253a201e94548d68281edccbaf
SSDEEP

384:e8Kj/M8yEryzqEt7a9Oey+IFdP64VYaEwDtiBgxoxlnLr2STcEICxXBhgBx4eMDa:eDD1r+VWOV+csoHViBBn+EFIqeMDGvaS

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

ogbatobanana.duckdns.org:4047

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-TANRSC
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-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\*Chrome = "rundll32.exe C:\\Users\\Admin\\AppData\\Roaming\\VIVA_01.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

TAX Organizer.exe

pid process

4636 TAX Organizer.exe

pid	process
4636	TAX Organizer.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

TAX Organizer.execmd.exe

description	pid	process	target process
PID 4636 wrote to memory of 2292	4636	TAX Organizer.exe	cmd.exe
PID 4636 wrote to memory of 2292	4636	TAX Organizer.exe	cmd.exe
PID 4636 wrote to memory of 2292	4636	TAX Organizer.exe	cmd.exe
PID 4636 wrote to memory of 4568	4636	TAX Organizer.exe	TAX Organizer.exe
PID 4636 wrote to memory of 4568	4636	TAX Organizer.exe	TAX Organizer.exe
PID 4636 wrote to memory of 4568	4636	TAX Organizer.exe	TAX Organizer.exe
PID 4636 wrote to memory of 4568	4636	TAX Organizer.exe	TAX Organizer.exe
PID 4636 wrote to memory of 4568	4636	TAX Organizer.exe	TAX Organizer.exe
PID 4636 wrote to memory of 4568	4636	TAX Organizer.exe	TAX Organizer.exe
PID 2292 wrote to memory of 2988	2292	cmd.exe	reg.exe
PID 2292 wrote to memory of 2988	2292	cmd.exe	reg.exe
PID 2292 wrote to memory of 2988	2292	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\TAX Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\TAX Organizer.exe"
1⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of WriteProcessMemory
PID:4636

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:2292

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:2988

C:\Users\Admin\AppData\Local\Temp\TAX Organizer.exe
"C:\Users\Admin\AppData\Local\Temp\TAX Organizer.exe"
2⤵
PID:4568

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Memory.vbs"
3⤵
PID:3552

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Local\Temp\Memory.vbs
Filesize
6.1MB

MD5
f2423557341720ee37a3ca4160ab350d

SHA1
dff2f296535fa069dd29ad0860bb1d3ca61a1e37

SHA256
82c1e03d1965f9efb7597e8999cc8464d471be14657d42362b4d6ffdb257d2d7

SHA512
3a0ec132bcb1239afa7046130eaf86e41a0693dc79d482124df0e93a1312dc4021a43c0a9db6b48ae201e322e9c61a3b0ac6ae791395d398404140cd79d7ed03

Download Submit
memory/4568-14-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-8-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-3-0x00000000001D0000-0x00000000001D1000-memory.dmp

Filesize
4KB

Download
memory/4568-5-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-11-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-7-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-22-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-18-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-6-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-12-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-10-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4568-15-0x0000000000410000-0x0000000000492000-memory.dmp

Filesize
520KB

Download
memory/4636-0-0x0000000010000000-0x0000000012DB4000-memory.dmp

Filesize
45.7MB

Download
memory/4636-9-0x0000000010000000-0x0000000012DB4000-memory.dmp

Filesize
45.7MB

Download
memory/4636-2-0x0000000010000000-0x0000000012DB4000-memory.dmp

Filesize
45.7MB

Download
memory/4636-1-0x0000000010000000-0x0000000012DB4000-memory.dmp

Filesize
45.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads