remcos | d01d468b1a708cdd63e86e00990dcb996eca66807175975fd139a3da4ec4b038

General

Target

WAYBILL.exe
Size

1.0MB
MD5

a7c29d968ed68f24747b39f1bcec2705
SHA1

0a30a96b8a155f03516812df1e4bffebeadca698
SHA256

db5a12184d9b6acdf484a88b3e65aa9435f8a9d7eda48418aef2d028b98913d4
SHA512

9b6a70d28e4ab26e7b0c4ae79b4a1211da45af13aaf5eb27d0eb6080f520e47dea134a2d45f6ab3caef4e04c363e4bafbc9589404a146e478c9e68b4d36d6729

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

flexyval01.hopto.org:2404

flexyval02.hopto.org:2404

flexyval03.hopto.org:2404

flexyval04.hopto.org:2404

flexyval06.hopto.org:2404

flexyval05.hopto.org:2404

flexyval07.hopto.org:2404

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Gallery-STMAJU
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

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

T1060

Modify Registry

T1112

Processes:

WAYBILL.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2403053463-4052593947-3703345493-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Yjuheuz = "C:\\Users\\Public\\zuehujY.url"	WAYBILL.exe

Suspicious use of WriteProcessMemory 24 IoCs

Processes:

WAYBILL.exeDpiScaling.exe

description	pid	process	target process
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 1072 wrote to memory of 2784	1072	WAYBILL.exe	DpiScaling.exe
PID 2784 wrote to memory of 768	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 768	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 768	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 2140	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 2140	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 2140	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 1204	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 1204	2784	DpiScaling.exe	DpiScaling.exe
PID 2784 wrote to memory of 1204	2784	DpiScaling.exe	DpiScaling.exe

C:\Users\Admin\AppData\Local\Temp\WAYBILL.exe
"C:\Users\Admin\AppData\Local\Temp\WAYBILL.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1072

C:\Windows\SysWOW64\DpiScaling.exe
C:\Windows\System32\DpiScaling.exe
2⤵
- Suspicious use of WriteProcessMemory
PID:2784

C:\Windows\SysWOW64\DpiScaling.exe
C:\Windows\SysWOW64\DpiScaling.exe /stext "C:\Users\Admin\AppData\Local\Temp\obnllts"
3⤵
PID:768

C:\Windows\SysWOW64\DpiScaling.exe
C:\Windows\SysWOW64\DpiScaling.exe /stext "C:\Users\Admin\AppData\Local\Temp\zvaeemddfmt"
3⤵
PID:2140

C:\Windows\SysWOW64\DpiScaling.exe
C:\Windows\SysWOW64\DpiScaling.exe /stext "C:\Users\Admin\AppData\Local\Temp\jpgofwnftulaan"
3⤵
PID:1204

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/768-138-0x0000000000000000-mapping.dmp

Download
memory/1204-140-0x0000000000000000-mapping.dmp

Download
memory/2140-139-0x0000000000000000-mapping.dmp

Download
memory/2784-135-0x0000000000000000-mapping.dmp

Download
memory/2784-136-0x0000000010590000-0x000000001060D000-memory.dmp

Filesize
500KB

Download
memory/2784-137-0x0000000002E10000-0x0000000002E8A000-memory.dmp

Filesize
488KB

Download

Analysis

Sharing