remcos | ca9e376c93bcc57e658566cdb0b0f68d6417a6e6e69705f5c9fa883d5c82282f

Analysis

max time kernel
149s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-01-2025 17:57

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General

Target

JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe
Size

1.0MB
MD5

ea7b951cd02856e10eb2316f141c5107
SHA1

5700aeb775258508491cd7bc735adaee26da67be
SHA256

ca9e376c93bcc57e658566cdb0b0f68d6417a6e6e69705f5c9fa883d5c82282f
SHA512

570bacaf2e398f31736936350542151cd3cd5e785de5d3a750ceab2ac455b50c22af85042496a846bb18224257fbd7b7b4c02800a04638da0fee1d84415fd15c
SSDEEP

12288:FthatZrYWF1dLSBr7QlU2+BbkB1/L8R4jGjeEPMIthO/W1Ad9S2NVvz6Sgq7qrcc:Ft8tuWFOBrc62is8iKXOSQTEcAS

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

gdyhjjdhbvxgsfe.gotdns.ch:1996

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
fsd.exe
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
remcos_lrqrjhqsyqtzudh
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
ioa
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

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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe

Executes dropped EXE 2 IoCs

pid	Process
5004	fsd.exe
3512	fsd.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\ioa = "\"C:\\Users\\Admin\\AppData\\Roaming\\fsd.exe\""	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ioa = "\"C:\\Users\\Admin\\AppData\\Roaming\\fsd.exe\""	fsd.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2560 set thread context of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 5004 set thread context of 3512	5004	fsd.exe	96

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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	fsd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1076	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1076	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3512	fsd.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 2560 wrote to memory of 1264	2560	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	90
PID 1264 wrote to memory of 4780	1264	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	91
PID 1264 wrote to memory of 4780	1264	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	91
PID 1264 wrote to memory of 4780	1264	JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe	91
PID 4780 wrote to memory of 1076	4780	cmd.exe	93
PID 4780 wrote to memory of 1076	4780	cmd.exe	93
PID 4780 wrote to memory of 1076	4780	cmd.exe	93
PID 4780 wrote to memory of 5004	4780	cmd.exe	94
PID 4780 wrote to memory of 5004	4780	cmd.exe	94
PID 4780 wrote to memory of 5004	4780	cmd.exe	94
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96
PID 5004 wrote to memory of 3512	5004	fsd.exe	96

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe
"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2560
- C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe
  "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_ea7b951cd02856e10eb2316f141c5107.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1264
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4780
  - - C:\Windows\SysWOW64\PING.EXE
      PING 127.0.0.1 -n 2
      4⤵
      System Location Discovery: System Language Discovery
      System Network Configuration Discovery: Internet Connection Discovery
      Runs ping.exe
      PID:1076
  - - C:\Users\Admin\AppData\Roaming\fsd.exe
      "C:\Users\Admin\AppData\Roaming\fsd.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:5004
    - - C:\Users\Admin\AppData\Roaming\fsd.exe
        
        "C:\Users\Admin\AppData\Roaming\fsd.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetWindowsHookEx
        
        PID:3512

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

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
89B

MD5
0ba9b63278e8f4ffce5472db6801fe6e

SHA1
a547eb08912c77ceb378326c635b53f1bd32f91b

SHA256
50f2f595594020af4a3aa65fb42b0b999f28869c2bf44b4dedbc1bfd683a167f

SHA512
7a2b354c9ce47d9e7912797ab0b1d78b514266adca3c376d3344b6cd6a0a1f6d9fe4784153013ca67dd93bf3daf22a09ee359668ce2e09449bc7c71b882d07d2

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

Filesize
1.0MB

MD5
ea7b951cd02856e10eb2316f141c5107

SHA1
5700aeb775258508491cd7bc735adaee26da67be

SHA256
ca9e376c93bcc57e658566cdb0b0f68d6417a6e6e69705f5c9fa883d5c82282f

SHA512
570bacaf2e398f31736936350542151cd3cd5e785de5d3a750ceab2ac455b50c22af85042496a846bb18224257fbd7b7b4c02800a04638da0fee1d84415fd15c

Download Submit
memory/1264-11-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1264-22-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1264-18-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1264-14-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2560-5-0x00000000054F0000-0x00000000054FA000-memory.dmp

Filesize
40KB

Download
memory/2560-4-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/2560-8-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download
memory/2560-9-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/2560-10-0x0000000009A30000-0x0000000009AEC000-memory.dmp

Filesize
752KB

Download
memory/2560-6-0x0000000009660000-0x00000000096FC000-memory.dmp

Filesize
624KB

Download
memory/2560-0-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download
memory/2560-7-0x00000000080C0000-0x00000000080CA000-memory.dmp

Filesize
40KB

Download
memory/2560-19-0x0000000074EC0000-0x0000000075670000-memory.dmp

Filesize
7.7MB

Download
memory/2560-3-0x0000000007F90000-0x0000000008022000-memory.dmp

Filesize
584KB

Download
memory/2560-2-0x00000000084A0000-0x0000000008A44000-memory.dmp

Filesize
5.6MB

Download
memory/2560-1-0x0000000000F80000-0x0000000001088000-memory.dmp

Filesize
1.0MB

Download
memory/3512-32-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/5004-27-0x0000000074ECE000-0x0000000074ECF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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