remcos | 82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc

General

Target

JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe
Size

124KB
MD5

e539333186264615997bd8dc947b93f4
SHA1

bfb26373cc908ec3d5f4431ab21474d5c791a11e
SHA256

82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc
SHA512

f5829c4a91553056a8a0012b1e74966240a63e00c072fc8814d89915fffac36518da0eac353ab4bcd86af8a157c2535407580a8cb673ed2e09e1bf5c77900676
SSDEEP

3072:mVh1qaSs6IF9OK4b80S2Van4Va1cpcQjed5OzqhUSa:yh1qn3IF9Obbj/a1cpcQjeHOzqhUS

Score

10^/10

remcos wakidi discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

wakidi

C2

zimchi2020.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-8BO56S
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
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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4412	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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4412	remcos.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3940 wrote to memory of 1848	3940	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe	83
PID 3940 wrote to memory of 1848	3940	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe	83
PID 3940 wrote to memory of 1848	3940	JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe	83
PID 1848 wrote to memory of 2768	1848	WScript.exe	84
PID 1848 wrote to memory of 2768	1848	WScript.exe	84
PID 1848 wrote to memory of 2768	1848	WScript.exe	84
PID 2768 wrote to memory of 4412	2768	cmd.exe	86
PID 2768 wrote to memory of 4412	2768	cmd.exe	86
PID 2768 wrote to memory of 4412	2768	cmd.exe	86

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc.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:3940
- 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:1848
- - 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:2768
  - - 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 use of SetWindowsHookEx
      PID:4412

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
8671a8e8ca7d296c689b9d87b28d4b32

SHA1
ba9926137145775b14f5e242c0c02ca0cf9263c8

SHA256
df35a552d9076363808b2a690bbb9686645291e5f578421143cc87acff06f1b8

SHA512
007f353c377660d2d3e4127aa77c4aadcfaff69d1c0d71fb989d533639552e604aae40fc2d09349a0e4d54217bd0797322ca56a1a0cd70b01553db7f5b476aa7

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

Filesize
124KB

MD5
e539333186264615997bd8dc947b93f4

SHA1
bfb26373cc908ec3d5f4431ab21474d5c791a11e

SHA256
82e58023e850c0341d19f135f46bb33fc39541dd5526d9a7936538fcf0c9eddc

SHA512
f5829c4a91553056a8a0012b1e74966240a63e00c072fc8814d89915fffac36518da0eac353ab4bcd86af8a157c2535407580a8cb673ed2e09e1bf5c77900676

Download Submit

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads