remcos | db70d3bc51ab841d791d58a97816b8542267e679fd37737236b95944eaac0643

General

Target

PO.exe
Size

1.3MB
MD5

5d15087ab767a84ec8e8805bb26eb8b8
SHA1

01bba4ff864c053b3485b20cb4e60666be7355a7
SHA256

6b509b581157e265d6e3d2bdeed463195464daeafe98b57cea4ef59141d21b62
SHA512

dcc463497cfbe933de85999b6010382b82a449f827621f1f5215a9459696f80172e69019b8d1385d2fc3edfe0543035b73042cbab7d2b860c8e382d8fa9d5805
SSDEEP

24576:ztb20pkaCqT5TBWgNQ7azerXt4yv6uaDWBq74Ws66A:wVg5tQ7azeryYA4OZj5

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\Bactris.vbs	Bactris.exe

Executes dropped EXE 1 IoCs

pid	Process
2200	Bactris.exe

Loads dropped DLL 1 IoCs

pid	Process
844	PO.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/files/0x00070000000195af-8.dat	autoit_exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2200 set thread context of 2992	2200	Bactris.exe	31
PID 2992 set thread context of 2724	2992	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	PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bactris.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2992	svchost.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2200	Bactris.exe
2992	svchost.exe

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
844	PO.exe
844	PO.exe
2200	Bactris.exe
2200	Bactris.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
844	PO.exe
844	PO.exe
2200	Bactris.exe
2200	Bactris.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 844 wrote to memory of 2200	844	PO.exe	30
PID 844 wrote to memory of 2200	844	PO.exe	30
PID 844 wrote to memory of 2200	844	PO.exe	30
PID 844 wrote to memory of 2200	844	PO.exe	30
PID 2200 wrote to memory of 2992	2200	Bactris.exe	31
PID 2200 wrote to memory of 2992	2200	Bactris.exe	31
PID 2200 wrote to memory of 2992	2200	Bactris.exe	31
PID 2200 wrote to memory of 2992	2200	Bactris.exe	31
PID 2200 wrote to memory of 2992	2200	Bactris.exe	31
PID 2992 wrote to memory of 2724	2992	svchost.exe	32
PID 2992 wrote to memory of 2724	2992	svchost.exe	32
PID 2992 wrote to memory of 2724	2992	svchost.exe	32
PID 2992 wrote to memory of 2724	2992	svchost.exe	32
PID 2992 wrote to memory of 2724	2992	svchost.exe	32

C:\Users\Admin\AppData\Local\Temp\PO.exe
"C:\Users\Admin\AppData\Local\Temp\PO.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:844
- C:\Users\Admin\AppData\Local\corynteria\Bactris.exe
  "C:\Users\Admin\AppData\Local\Temp\PO.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:2200
- - C:\Windows\SysWOW64\svchost.exe
    "C:\Users\Admin\AppData\Local\Temp\PO.exe"
    3⤵
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:2992
  - - C:\Windows\SysWOW64\svchost.exe
      C:\Windows\System32\svchost.exe
      4⤵
      PID:2724

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\corynteria\Bactris.exe

Filesize
1.3MB

MD5
5d15087ab767a84ec8e8805bb26eb8b8

SHA1
01bba4ff864c053b3485b20cb4e60666be7355a7

SHA256
6b509b581157e265d6e3d2bdeed463195464daeafe98b57cea4ef59141d21b62

SHA512
dcc463497cfbe933de85999b6010382b82a449f827621f1f5215a9459696f80172e69019b8d1385d2fc3edfe0543035b73042cbab7d2b860c8e382d8fa9d5805

Download Submit
memory/844-6-0x0000000000600000-0x0000000000A00000-memory.dmp

Filesize
4.0MB

Download
memory/2200-20-0x00000000009D0000-0x0000000000DD0000-memory.dmp

Filesize
4.0MB

Download
memory/2724-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2724-28-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2724-32-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2724-30-0x0000000000080000-0x0000000000088000-memory.dmp

Filesize
32KB

Download
memory/2992-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2992-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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