remcos | 4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463

General

Target

JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe
Size

124KB
MD5

722eeea14abbf735445c0b3208c1b7b5
SHA1

ea5abe80e75fc0e419238933c174e004c6279fa1
SHA256

4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463
SHA512

1262ee71c2f32a38d3894867105fe1ce5d889e2cebe4a3dfd630b57237ec4380eac321b687ce13259720cec274dfd603ce538dcbf5e4284c9ab1184cba677bdd
SSDEEP

3072:mlh1qaSs6IF9OK4b80S2Van4Va1cpcQjed5OzqhU8a:Ch1qn3IF9Obbj/a1cpcQjeHOzqhU8

Score

10^/10

remcos egommbute2020 discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

EGOMMBUTE2020

C2

egommbute2020.ddns.net:7171

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-XWNA6D
screenshot_crypt
true
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
true
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4580	remcos.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-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.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	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.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

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\Local Settings	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4580	remcos.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4580	remcos.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 3052	2560	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe	82
PID 2560 wrote to memory of 3052	2560	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe	82
PID 2560 wrote to memory of 3052	2560	JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe	82
PID 3052 wrote to memory of 876	3052	WScript.exe	83
PID 3052 wrote to memory of 876	3052	WScript.exe	83
PID 3052 wrote to memory of 876	3052	WScript.exe	83
PID 876 wrote to memory of 4580	876	cmd.exe	85
PID 876 wrote to memory of 4580	876	cmd.exe	85
PID 876 wrote to memory of 4580	876	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463.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:2560
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3052
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:876
  - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
      C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious behavior: GetForegroundWindowSpam
      Suspicious use of SetWindowsHookEx
      PID:4580

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

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

Filesize
418B

MD5
ff449f6f7bc5e2d800eb30e2d2c56611

SHA1
93419ea805b9ce35a766e5c56db50d54c2d3f94b

SHA256
655787cf79040ee701963986320556a834d6345e850e03653e4852d94eb09416

SHA512
02a17064c837d36ba241fb8edf9266e33479a10eb8652b974158a3227878a801da29db1108413bb2c298a105b3c19bd20c3a3100f19444189f434706825766a6

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat

Filesize
74B

MD5
41f40f9b0098f9e96ebc739e66c34be8

SHA1
75fbe11ff576d84a5bc013e1f156638dd5f3ed36

SHA256
3715aa9ce08d9e10671d7591c1b4fe088975e8ec67afcc419b9cd6325b71e6cd

SHA512
2ee45f7ee03810f2c23f8a0ab3123251940e12dca371f3a0eee9ec559dcaaefa23a1c0d088fba0bfa89754d1ab9799e794f41f33e9a14595adfebf4c724c8a70

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
124KB

MD5
722eeea14abbf735445c0b3208c1b7b5

SHA1
ea5abe80e75fc0e419238933c174e004c6279fa1

SHA256
4e7c9fbc8e4e5d0476ba125569283ecc6cf5f2d8b78ee3edb765dd549016f463

SHA512
1262ee71c2f32a38d3894867105fe1ce5d889e2cebe4a3dfd630b57237ec4380eac321b687ce13259720cec274dfd603ce538dcbf5e4284c9ab1184cba677bdd

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads