remcos | 20914f0b51ca703b58ca08a4fb2ae797a09cd5b5bc8f17837691777ebb963bd3

General

Target

0004532DESCRIPTION.exe
Size

1.3MB
MD5

99869676e00d4b9bbafba630976d433d
SHA1

382b278b3e0ff8272cac88277e5db6b73ff0b808
SHA256

c9c2cc6c696510e2de26e171d083b8f153f8d160eb00bc5cccc6f7f07623e183
SHA512

e586c7fb045eaa8e1b2151e6bf2768c2033df3b4d2398d3f27bc601e1864ce438dc5e2c8649dc095ec9aa162a236a9fe1def098e8d7c6443cafcca7a075d58f4
SSDEEP

24576:au6J33O0c+JY5UZ+XC0kGso6FaebHHfLOautp30hdL+1aWY:su0c++OCvkGs9FaebnjOauIdOY

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\misruling.vbs	misruling.exe

Executes dropped EXE 1 IoCs

pid	Process
2836	misruling.exe

Loads dropped DLL 1 IoCs

pid	Process
2828	0004532DESCRIPTION.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x0033000000016d17-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2836 set thread context of 2840	2836	misruling.exe	31
PID 2840 set thread context of 2676	2840	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	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0004532DESCRIPTION.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	misruling.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2840	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2836	misruling.exe
2840	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
2828	0004532DESCRIPTION.exe
2828	0004532DESCRIPTION.exe
2836	misruling.exe
2836	misruling.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
2828	0004532DESCRIPTION.exe
2828	0004532DESCRIPTION.exe
2836	misruling.exe
2836	misruling.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2828 wrote to memory of 2836	2828	0004532DESCRIPTION.exe	30
PID 2828 wrote to memory of 2836	2828	0004532DESCRIPTION.exe	30
PID 2828 wrote to memory of 2836	2828	0004532DESCRIPTION.exe	30
PID 2828 wrote to memory of 2836	2828	0004532DESCRIPTION.exe	30
PID 2836 wrote to memory of 2840	2836	misruling.exe	31
PID 2836 wrote to memory of 2840	2836	misruling.exe	31
PID 2836 wrote to memory of 2840	2836	misruling.exe	31
PID 2836 wrote to memory of 2840	2836	misruling.exe	31
PID 2836 wrote to memory of 2840	2836	misruling.exe	31
PID 2840 wrote to memory of 2676	2840	svchost.exe	32
PID 2840 wrote to memory of 2676	2840	svchost.exe	32
PID 2840 wrote to memory of 2676	2840	svchost.exe	32
PID 2840 wrote to memory of 2676	2840	svchost.exe	32
PID 2840 wrote to memory of 2676	2840	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\0004532DESCRIPTION.exe
"C:\Users\Admin\AppData\Local\Temp\0004532DESCRIPTION.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2828
- C:\Users\Admin\AppData\Local\Allene\misruling.exe
  "C:\Users\Admin\AppData\Local\Temp\0004532DESCRIPTION.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:2836
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\0004532DESCRIPTION.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2840
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:2676

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

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

Filesize
1.3MB

MD5
99869676e00d4b9bbafba630976d433d

SHA1
382b278b3e0ff8272cac88277e5db6b73ff0b808

SHA256
c9c2cc6c696510e2de26e171d083b8f153f8d160eb00bc5cccc6f7f07623e183

SHA512
e586c7fb045eaa8e1b2151e6bf2768c2033df3b4d2398d3f27bc601e1864ce438dc5e2c8649dc095ec9aa162a236a9fe1def098e8d7c6443cafcca7a075d58f4

Download Submit
memory/2676-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2676-28-0x00000000000D0000-0x00000000000D8000-memory.dmp

Filesize
32KB

Download
memory/2676-32-0x00000000000D0000-0x00000000000D8000-memory.dmp

Filesize
32KB

Download
memory/2676-31-0x00000000000D0000-0x00000000000D8000-memory.dmp

Filesize
32KB

Download
memory/2828-6-0x0000000000BA0000-0x0000000000FA0000-memory.dmp

Filesize
4.0MB

Download
memory/2836-20-0x0000000000CF0000-0x00000000010F0000-memory.dmp

Filesize
4.0MB

Download
memory/2840-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2840-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2840-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2840-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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