remcos | 8c9a46ffb93b53c2141ae50d99e106bd29d294e474e227f6097a79742d717d59

General

Target
560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe
Size 128KB
Sample240729-v76d7swclc
SHA256 8c9a46ffb93b53c2141ae50d99e106bd29d294e474e227f6097a79742d717d59
MD5 560e77d59fe10a3a12141ec88df1073f
SHA1 b485ad98bf95b7654e70d2766c6474cbae2a339d
SHA512 80cbe3a41fa29700b38dad4a9966b1c99d3cf63a14a55e919d12f1df9cf2199624dcfe3aa4ba9cc6c21886a5572f4c09d81266e6db146aa83de55b01e0cc2462
SSDEEP 3072:kHAj1NDQQThp3Zwr6ky2EPb6zmRK+jzHi0aKMTh+mrzqhGtwGc:kAj15QOh7weky2ubfi0aKMThJrzqhG
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.6.0 Pro

Botnet

RemoteHost

C2

103.211.55.190:2404

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
rs.exe
copy_folder
Rs
delete_file
true
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-KLYOB6
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Ros
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Checks computer location settings 2 TTPs 2 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-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
4596	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
5024	rs.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ros = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rs\\rs.exe\""	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ros = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rs\\rs.exe\""	rs.exe

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 4 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	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.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	rs.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000_Classes\Local Settings	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3584 wrote to memory of 4596	3584	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe	87
PID 3584 wrote to memory of 4596	3584	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe	87
PID 3584 wrote to memory of 4596	3584	560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe	87
PID 4596 wrote to memory of 2872	4596	WScript.exe	88
PID 4596 wrote to memory of 2872	4596	WScript.exe	88
PID 4596 wrote to memory of 2872	4596	WScript.exe	88
PID 2872 wrote to memory of 5024	2872	cmd.exe	90
PID 2872 wrote to memory of 5024	2872	cmd.exe	90
PID 2872 wrote to memory of 5024	2872	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\560e77d59fe10a3a12141ec88df1073f_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3584
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4596
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Rs\rs.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2872
  - - C:\Users\Admin\AppData\Roaming\Rs\rs.exe
      C:\Users\Admin\AppData\Roaming\Rs\rs.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:5024

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

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

install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 606B
SHA256 7d62e0f396210b9f496403ee927618a960a3310cdad2f6df9a9e7db3e33ca8ab
MD5 e9db6ee89250477702cb6e00f5a2f46c
SHA1 d67863d18b633915cb97647a23ef11b27d668c04
SHA512 d93156448104cba8d18c21a5970bacae588f691df7d0919bfdb6df80c494571a656f7c50b0687530db2de0dd49109e28ad67fc162ee2b0a500e9a455c4af0179
MD5 SHA1 SHA512

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rs.exe

Path C:\Users\Admin\AppData\Roaming\Rs\rs.exe
Size 128KB
SHA256 8c9a46ffb93b53c2141ae50d99e106bd29d294e474e227f6097a79742d717d59
MD5 560e77d59fe10a3a12141ec88df1073f
SHA1 b485ad98bf95b7654e70d2766c6474cbae2a339d
SHA512 80cbe3a41fa29700b38dad4a9966b1c99d3cf63a14a55e919d12f1df9cf2199624dcfe3aa4ba9cc6c21886a5572f4c09d81266e6db146aa83de55b01e0cc2462
SSDEEP 3072:kHAj1NDQQThp3Zwr6ky2EPb6zmRK+jzHi0aKMTh+mrzqhGtwGc:kAj15QOh7weky2ubfi0aKMThJrzqhG
MD5 SHA1 SHA512 SSDEEP

Submit Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads