remcos | 52939296475d2fc83dab2eafb9b8512a53a450e3aaf60f288e1de3cc811fb49b

General

Target

Shipment Document BL,INV and packing list.jpg.exe
Size

1.3MB
MD5

9aa7675541b2cf73b71f5ddc6be2084b
SHA1

b8af9227da8a2e6957604cb4e643370adadeae68
SHA256

1fc20be3230c5de684a0c39942bfe11d80b71d540c6c42c40fb22c1c2416d2c5
SHA512

040ec11512a61ecb84360dc045a5098ae7d25c0490da901e7cb510ee128585b038df6132e3e3811b66d3c4fefd618091be6b98c0a4ef5a5df4c2416a8eba6b50
SSDEEP

24576:Ju6J33O0c+JY5UZ+XC0kGso6FaSZ62TTqVNrwvtK1pWp1N/az2DIjWY:ru0c++OCvkGs9FaSMoqIk1pW5c2HY

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

103.83.87.190:5817

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
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-E1OC2H
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
Remcos family
remcos

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Prober.vbs	Prober.exe

Executes dropped EXE 1 IoCs

pid	Process
3720	Prober.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x000b0000000240e8-9.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3720 set thread context of 4468	3720	Prober.exe	91

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Shipment Document BL,INV and packing list.jpg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Prober.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3720	Prober.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4468	svchost.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4468	svchost.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1416 wrote to memory of 3720	1416	Shipment Document BL,INV and packing list.jpg.exe	89
PID 1416 wrote to memory of 3720	1416	Shipment Document BL,INV and packing list.jpg.exe	89
PID 1416 wrote to memory of 3720	1416	Shipment Document BL,INV and packing list.jpg.exe	89
PID 3720 wrote to memory of 4468	3720	Prober.exe	91
PID 3720 wrote to memory of 4468	3720	Prober.exe	91
PID 3720 wrote to memory of 4468	3720	Prober.exe	91
PID 3720 wrote to memory of 4468	3720	Prober.exe	91

C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe
"C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1416
- C:\Users\Admin\AppData\Local\hurtling\Prober.exe
  "C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:3720
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\Shipment Document BL,INV and packing list.jpg.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    PID:4468

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\hurtling\Prober.exe

Filesize
1.3MB

MD5
9aa7675541b2cf73b71f5ddc6be2084b

SHA1
b8af9227da8a2e6957604cb4e643370adadeae68

SHA256
1fc20be3230c5de684a0c39942bfe11d80b71d540c6c42c40fb22c1c2416d2c5

SHA512
040ec11512a61ecb84360dc045a5098ae7d25c0490da901e7cb510ee128585b038df6132e3e3811b66d3c4fefd618091be6b98c0a4ef5a5df4c2416a8eba6b50

Download Submit
memory/1416-6-0x0000000001410000-0x0000000001810000-memory.dmp

Filesize
4.0MB

Download
memory/3720-18-0x0000000001310000-0x0000000001710000-memory.dmp

Filesize
4.0MB

Download
memory/4468-28-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-29-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-22-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-23-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-24-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-25-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-26-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-27-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-20-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-21-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-30-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-31-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-32-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-33-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-34-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-35-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-36-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-37-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-38-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4468-39-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download

Analysis

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