remcos | 842c192bb3c1902f893da4f45a77aaeeda049c84055f237b113dc380c0e6e6f4

General

Target

FDR9876567000.exe
Size

833KB
MD5

c517ecc1d57af03affdd6945e1b618d8
SHA1

5c5174ebdf5902ada7c5899b6c0b98f2db363372
SHA256

9a32e0821da4466b858ecfd185f3d9bff232d8a3b44983988c248df05ef7c2ef
SHA512

355c1f39946662b0c16c6a5fa4c387aad03e1dc1c1dd74d650a784fc9e718b890a877937d8d3a26ab62a22385f03e02e6d0faa6d9e07ea3b16151c909596097a
SSDEEP

12288:5quErHF6xC9D6DmR1J98w4oknqOOCyQfY7nPIsUgzp6x0hFxZAXFbuFb7anFbq44:Mrl6kD68JmlotQfgEYpOqFxTlaVXSxz

Score

10^/10

remcos remotehost discovery rat upx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.210.150.26:8787

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-R1T905
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

Processes:

ectosphere.exe

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

Executes dropped EXE 1 IoCs

Processes:

ectosphere.exe

pid	Process
4496	ectosphere.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

Processes:

resource	yara_rule
behavioral2/memory/4348-14-0x0000000000F00000-0x00000000010CE000-memory.dmp	autoit_exe
behavioral2/memory/4496-37-0x00000000009B0000-0x0000000000B7E000-memory.dmp	autoit_exe

UPX packed file 5 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/4348-0-0x0000000000F00000-0x00000000010CE000-memory.dmp	upx
behavioral2/files/0x0007000000023c9c-10.dat	upx
behavioral2/memory/4496-11-0x00000000009B0000-0x0000000000B7E000-memory.dmp	upx
behavioral2/memory/4348-14-0x0000000000F00000-0x00000000010CE000-memory.dmp	upx
behavioral2/memory/4496-37-0x00000000009B0000-0x0000000000B7E000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

FDR9876567000.exeectosphere.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	FDR9876567000.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ectosphere.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

FDR9876567000.exeectosphere.exe

pid	Process
4348	FDR9876567000.exe
4348	FDR9876567000.exe
4496	ectosphere.exe
4496	ectosphere.exe

Suspicious use of SendNotifyMessage 4 IoCs

Processes:

FDR9876567000.exeectosphere.exe

pid	Process
4348	FDR9876567000.exe
4348	FDR9876567000.exe
4496	ectosphere.exe
4496	ectosphere.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

FDR9876567000.exe

description	pid	Process	procid_target
PID 4348 wrote to memory of 4496	4348	FDR9876567000.exe	82
PID 4348 wrote to memory of 4496	4348	FDR9876567000.exe	82
PID 4348 wrote to memory of 4496	4348	FDR9876567000.exe	82

C:\Users\Admin\AppData\Local\Temp\FDR9876567000.exe
"C:\Users\Admin\AppData\Local\Temp\FDR9876567000.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4348
- C:\Users\Admin\AppData\Local\snails\ectosphere.exe
  "C:\Users\Admin\AppData\Local\Temp\FDR9876567000.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:4496

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

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
1e6e96e3d11d335fa3ef36080f5157df

SHA1
edaa5ef50d57359d58ff0348eb0f96aafb457f19

SHA256
be9e5edb7dc05b65642271fc3b702e076cc9a423d7e8bc77045fddc8f0918517

SHA512
d9724c9adf6e74755eeec2f670c03687a54f5af172ab9fb2c36bb430625aa87d0a220a23c7e48734fd9604d08ec2f7dccdc925094f806f41726b0cac33a543e3

Download Submit
C:\Users\Admin\AppData\Local\Temp\Hezron

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
C:\Users\Admin\AppData\Local\snails\ectosphere.exe

Filesize
833KB

MD5
c517ecc1d57af03affdd6945e1b618d8

SHA1
5c5174ebdf5902ada7c5899b6c0b98f2db363372

SHA256
9a32e0821da4466b858ecfd185f3d9bff232d8a3b44983988c248df05ef7c2ef

SHA512
355c1f39946662b0c16c6a5fa4c387aad03e1dc1c1dd74d650a784fc9e718b890a877937d8d3a26ab62a22385f03e02e6d0faa6d9e07ea3b16151c909596097a

Download Submit
memory/4348-0-0x0000000000F00000-0x00000000010CE000-memory.dmp

Filesize
1.8MB

Download
memory/4348-7-0x00000000019C0000-0x0000000001DC0000-memory.dmp

Filesize
4.0MB

Download
memory/4348-14-0x0000000000F00000-0x00000000010CE000-memory.dmp

Filesize
1.8MB

Download
memory/4496-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-22-0x0000000001280000-0x0000000001680000-memory.dmp

Filesize
4.0MB

Download
memory/4496-37-0x00000000009B0000-0x0000000000B7E000-memory.dmp

Filesize
1.8MB

Download
memory/4496-38-0x0000000001280000-0x0000000001680000-memory.dmp

Filesize
4.0MB

Download
memory/4496-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-11-0x00000000009B0000-0x0000000000B7E000-memory.dmp

Filesize
1.8MB

Download
memory/4496-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-57-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-67-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-78-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-89-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-90-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads