remcos | af9a6206a5f41bcdf8567adee799d8c5141da48776508c3c73617b2c140d84cb

General

Target

1.exe
Size

483KB
MD5

38c479083ba7387ebad73f3b67020eab
SHA1

48bbd0bf1d333293c22c96b7731ba54343d7f8fe
SHA256

af9a6206a5f41bcdf8567adee799d8c5141da48776508c3c73617b2c140d84cb
SHA512

23632f540c6e287a31828cdb7eac23ca5acd8653908f6211fadafb64734bafcecb34f7a27f3ee843dce054397b1ae5b723f467ebeca5d66d52320ba7909f7fbe
SSDEEP

6144:G5zY+w1LqZBCxKedv//NEUn+N5hkf/0TE7RvIZ/jbsAORZzAXMcrztA4:G5k+Yqaxrh3Nln+N52fIA4jbsvZzSA4

Score

10^/10

remcos hello world!discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Hello World!

C2

46.175.167.116:2404

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Realtek Driver.exe
copy_folder
Realtek Audio
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Realtek Audio-J15M0S
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

Adds policy Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	1.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Realtek Driver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	Realtek Driver.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation	1.exe

Executes dropped EXE 1 IoCs

pid	Process
5040	Realtek Driver.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	1.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	1.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	Realtek Driver.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	Realtek Driver.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Realtek Audio-J15M0S = "\"C:\\Users\\Admin\\AppData\\Roaming\\Realtek Audio\\Realtek Driver.exe\""	iexplore.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 5040 set thread context of 4344	5040	Realtek Driver.exe	83
PID 4344 set thread context of 2252	4344	iexplore.exe	84

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 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	1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Realtek Driver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	1.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
5040	Realtek Driver.exe
5040	Realtek Driver.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
5040	Realtek Driver.exe
4344	iexplore.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4376 wrote to memory of 5040	4376	1.exe	82
PID 4376 wrote to memory of 5040	4376	1.exe	82
PID 4376 wrote to memory of 5040	4376	1.exe	82
PID 5040 wrote to memory of 4344	5040	Realtek Driver.exe	83
PID 5040 wrote to memory of 4344	5040	Realtek Driver.exe	83
PID 5040 wrote to memory of 4344	5040	Realtek Driver.exe	83
PID 5040 wrote to memory of 4344	5040	Realtek Driver.exe	83
PID 4344 wrote to memory of 2252	4344	iexplore.exe	84
PID 4344 wrote to memory of 2252	4344	iexplore.exe	84
PID 4344 wrote to memory of 2252	4344	iexplore.exe	84
PID 4344 wrote to memory of 2252	4344	iexplore.exe	84

C:\Users\Admin\AppData\Local\Temp\1.exe
"C:\Users\Admin\AppData\Local\Temp\1.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4376
- C:\Users\Admin\AppData\Roaming\Realtek Audio\Realtek Driver.exe
  "C:\Users\Admin\AppData\Roaming\Realtek Audio\Realtek Driver.exe"
  2⤵
  - Adds policy Run key to start application
  - Executes dropped EXE
  - 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:5040
- - \??\c:\program files (x86)\internet explorer\iexplore.exe
    "c:\program files (x86)\internet explorer\iexplore.exe"
    3⤵
    - Adds policy Run key to start application
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of WriteProcessMemory
    PID:4344
  - - C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      4⤵
      PID:2252

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

2

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Realtek Audio\Realtek Driver.exe

Filesize
483KB

MD5
38c479083ba7387ebad73f3b67020eab

SHA1
48bbd0bf1d333293c22c96b7731ba54343d7f8fe

SHA256
af9a6206a5f41bcdf8567adee799d8c5141da48776508c3c73617b2c140d84cb

SHA512
23632f540c6e287a31828cdb7eac23ca5acd8653908f6211fadafb64734bafcecb34f7a27f3ee843dce054397b1ae5b723f467ebeca5d66d52320ba7909f7fbe

Download Submit
memory/2252-44-0x0000000000F10000-0x0000000000F92000-memory.dmp

Filesize
520KB

Download
memory/2252-42-0x0000000000F10000-0x0000000000F92000-memory.dmp

Filesize
520KB

Download
memory/2252-43-0x0000000000F10000-0x0000000000F92000-memory.dmp

Filesize
520KB

Download
memory/2252-41-0x0000000000F10000-0x0000000000F92000-memory.dmp

Filesize
520KB

Download
memory/4344-47-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-51-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-36-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-35-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-33-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-45-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-46-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-34-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-50-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-40-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-52-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-53-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-54-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-55-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-56-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-57-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-58-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-59-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download
memory/4344-60-0x0000000000500000-0x0000000000582000-memory.dmp

Filesize
520KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads