remcos | fa9f629254a8bbe915bbd587c0c060de580a18992103858a1d16686de8bd717e

Analysis

max time kernel
149s
max time network
148s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
18-12-2024 19:36

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General

Target

WaveSourceInstaller.exe
Size

469KB
MD5

e468b718e67495ea73c85d8258059adf
SHA1

dcad70f5c39ab85f900ef1288067dbf51eaeb503
SHA256

fa9f629254a8bbe915bbd587c0c060de580a18992103858a1d16686de8bd717e
SHA512

b4eb6cc848b5ebfc6bab7e1cc033ec468bc8cf2fed72ea912f9fc60d6eaab75664f4627646960dccab2aceefeab9c5acbd2fe1b57d992c62358929b4d840dedb
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSJn9:uiLJbpI7I2WhQqZ7J9

Score

10^/10

remcos wavesourceleaked discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

WaveSourceLeaked

204.10.194.175:4444

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
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-46FS9Q
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
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

Executes dropped EXE 1 IoCs

pid	Process
2724	remcos.exe

Loads dropped DLL 4 IoCs

pid	Process
2872	cmd.exe
2872	cmd.exe
2724	remcos.exe
2724	remcos.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	WaveSourceInstaller.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	WaveSourceInstaller.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2039016743-699959520-214465309-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2724 set thread context of 2428	2724	remcos.exe	32

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 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	WaveSourceInstaller.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2724	remcos.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2724	remcos.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 1700 wrote to memory of 2664	1700	WaveSourceInstaller.exe	28
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2664 wrote to memory of 2872	2664	WScript.exe	29
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2872 wrote to memory of 2724	2872	cmd.exe	31
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32
PID 2724 wrote to memory of 2428	2724	remcos.exe	32

C:\Users\Admin\AppData\Local\Temp\WaveSourceInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\WaveSourceInstaller.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2664
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\ProgramData\Remcos\remcos.exe
      C:\ProgramData\Remcos\remcos.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:2724
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:2428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
386B

MD5
1ec6289c6fd4c2ded6b2836ed28cbeb5

SHA1
c4e08195e6c640eb8860acc03fda1d649b4fe070

SHA256
6efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2

SHA512
20bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288

Download Submit
\ProgramData\Remcos\remcos.exe

Filesize
469KB

MD5
e468b718e67495ea73c85d8258059adf

SHA1
dcad70f5c39ab85f900ef1288067dbf51eaeb503

SHA256
fa9f629254a8bbe915bbd587c0c060de580a18992103858a1d16686de8bd717e

SHA512
b4eb6cc848b5ebfc6bab7e1cc033ec468bc8cf2fed72ea912f9fc60d6eaab75664f4627646960dccab2aceefeab9c5acbd2fe1b57d992c62358929b4d840dedb

Download Submit
memory/2428-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2428-12-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-13-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-15-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-16-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-17-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-18-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-19-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-20-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-24-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-23-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-25-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-26-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-28-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-27-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-29-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2428-30-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download