remcos | fd28d32c06682b30f1659824581324cb0ae3f2c80d98e1fac8d10255a77a99cb

General

Target

00213765ENQ.exe
Size

1.3MB
MD5

848fcc30357be982b8d107e6c45390a6
SHA1

477c03e4f9fb45f9ca6ae04c79728474ffc4cf2a
SHA256

07b27d0e65f751737e5d9bee0b78b5a56933264014b5171ae03f3c2c3b51ae0e
SHA512

a2adde1775886db699b103742469c8675c56633cac1c4b110947793b10c562d27ccd9fb482d5dce5f1052684925e156f81f70169d1a56fa61c6cbf4515bb65eb
SSDEEP

24576:Vu6J33O0c+JY5UZ+XC0kGso6FaKQ+KLJVQBZNsYfKxQfq+WY:3u0c++OCvkGs9FaKQLLJuB8owQiY

Score

10^/10

remcos remotehost discovery rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

192.3.64.152:2559

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-ZFXG9Y
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\semispheroidal.vbs	semispheroidal.exe

Executes dropped EXE 1 IoCs

pid	Process
1956	semispheroidal.exe

Loads dropped DLL 1 IoCs

pid	Process
1652	00213765ENQ.exe

AutoIT Executable 3 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0008000000018781-8.dat	autoit_exe
behavioral1/memory/1956-20-0x0000000000850000-0x00000000009A1000-memory.dmp	autoit_exe
behavioral1/memory/1956-25-0x0000000000850000-0x00000000009A1000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1956 set thread context of 2156	1956	semispheroidal.exe	31
PID 2156 set thread context of 340	2156	svchost.exe	32

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	00213765ENQ.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	semispheroidal.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2156	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1956	semispheroidal.exe
2156	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
1652	00213765ENQ.exe
1652	00213765ENQ.exe
1956	semispheroidal.exe
1956	semispheroidal.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
1652	00213765ENQ.exe
1652	00213765ENQ.exe
1956	semispheroidal.exe
1956	semispheroidal.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1652 wrote to memory of 1956	1652	00213765ENQ.exe	30
PID 1652 wrote to memory of 1956	1652	00213765ENQ.exe	30
PID 1652 wrote to memory of 1956	1652	00213765ENQ.exe	30
PID 1652 wrote to memory of 1956	1652	00213765ENQ.exe	30
PID 1956 wrote to memory of 2156	1956	semispheroidal.exe	31
PID 1956 wrote to memory of 2156	1956	semispheroidal.exe	31
PID 1956 wrote to memory of 2156	1956	semispheroidal.exe	31
PID 1956 wrote to memory of 2156	1956	semispheroidal.exe	31
PID 1956 wrote to memory of 2156	1956	semispheroidal.exe	31
PID 2156 wrote to memory of 340	2156	svchost.exe	32
PID 2156 wrote to memory of 340	2156	svchost.exe	32
PID 2156 wrote to memory of 340	2156	svchost.exe	32
PID 2156 wrote to memory of 340	2156	svchost.exe	32
PID 2156 wrote to memory of 340	2156	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\00213765ENQ.exe
"C:\Users\Admin\AppData\Local\Temp\00213765ENQ.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1652
- C:\Users\Admin\AppData\Local\Allene\semispheroidal.exe
  "C:\Users\Admin\AppData\Local\Temp\00213765ENQ.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1956
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\00213765ENQ.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2156
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:340

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

\Users\Admin\AppData\Local\Allene\semispheroidal.exe

Filesize
1.3MB

MD5
848fcc30357be982b8d107e6c45390a6

SHA1
477c03e4f9fb45f9ca6ae04c79728474ffc4cf2a

SHA256
07b27d0e65f751737e5d9bee0b78b5a56933264014b5171ae03f3c2c3b51ae0e

SHA512
a2adde1775886db699b103742469c8675c56633cac1c4b110947793b10c562d27ccd9fb482d5dce5f1052684925e156f81f70169d1a56fa61c6cbf4515bb65eb

Download Submit
memory/340-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/340-31-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/340-32-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/340-29-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/1652-6-0x0000000000870000-0x0000000000C70000-memory.dmp

Filesize
4.0MB

Download
memory/1956-20-0x0000000000850000-0x00000000009A1000-memory.dmp

Filesize
1.3MB

Download
memory/1956-25-0x0000000000850000-0x00000000009A1000-memory.dmp

Filesize
1.3MB

Download
memory/2156-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2156-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2156-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2156-33-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing