remcos | e819055cd0c4b64408c03b4e6fabc0185c05bc4f6056ce0b98f9fa257371b984

Analysis

max time kernel
146s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
08-10-2024 01:57

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe
Size

686KB
MD5

1ef530ef64809b07ab1c4c42ae5733ed
SHA1

9f329566d2893b7f30d79ff0c4e6fdf56433e30d
SHA256

e819055cd0c4b64408c03b4e6fabc0185c05bc4f6056ce0b98f9fa257371b984
SHA512

17164a1aaaf3c1aff8d64d4f2839f53c0a3f9db95c7b33a7056941ea8d5e91672331206436fa46b07d0cd6733aff9c6a66b661613443d23dd9339cd49784c83f
SSDEEP

12288:D5T4HK7zTYwu9KntMLuAdOVoco+Vjm9N1UG2j1dXEm3X5Zur:Dh3Ywu9KtvAdWoKVy9N32L76r

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

chucksnchucks.ydns.eu:6538

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
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
keylog_path
%AppData%
mouse_option
false
mutex
remcos_dfohiqnuljkopmr
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat 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-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe

Executes dropped EXE 2 IoCs

pid	Process
2128	remcos.exe
1440	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-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4516 set thread context of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 2128 set thread context of 1440	2128	remcos.exe	93

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 6 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	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.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
4548	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4548	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1440	remcos.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 4516 wrote to memory of 1156	4516	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	88
PID 1156 wrote to memory of 712	1156	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	89
PID 1156 wrote to memory of 712	1156	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	89
PID 1156 wrote to memory of 712	1156	1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe	89
PID 712 wrote to memory of 4548	712	cmd.exe	91
PID 712 wrote to memory of 4548	712	cmd.exe	91
PID 712 wrote to memory of 4548	712	cmd.exe	91
PID 712 wrote to memory of 2128	712	cmd.exe	92
PID 712 wrote to memory of 2128	712	cmd.exe	92
PID 712 wrote to memory of 2128	712	cmd.exe	92
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93
PID 2128 wrote to memory of 1440	2128	remcos.exe	93

C:\Users\Admin\AppData\Local\Temp\1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4516
- C:\Users\Admin\AppData\Local\Temp\1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\1ef530ef64809b07ab1c4c42ae5733ed_JaffaCakes118.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1156
- - 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:712
  - - 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:4548
  - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
      "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2128
    - - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
        
        "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        
        PID:1440

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
99B

MD5
76c1687d97dfdbcea62ef1490bec5001

SHA1
5f4d1aeafa7d840cde67b76f97416dd68efd1bed

SHA256
79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4

SHA512
da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925

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

Filesize
686KB

MD5
1ef530ef64809b07ab1c4c42ae5733ed

SHA1
9f329566d2893b7f30d79ff0c4e6fdf56433e30d

SHA256
e819055cd0c4b64408c03b4e6fabc0185c05bc4f6056ce0b98f9fa257371b984

SHA512
17164a1aaaf3c1aff8d64d4f2839f53c0a3f9db95c7b33a7056941ea8d5e91672331206436fa46b07d0cd6733aff9c6a66b661613443d23dd9339cd49784c83f

Download Submit
memory/1156-9-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1156-17-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1156-10-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1156-6-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/1440-31-0x0000000000400000-0x0000000000417000-memory.dmp

Filesize
92KB

Download
memory/2128-23-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/2128-22-0x00000000750A2000-0x00000000750A3000-memory.dmp

Filesize
4KB

Download
memory/2128-24-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/2128-25-0x00000000750A2000-0x00000000750A3000-memory.dmp

Filesize
4KB

Download
memory/2128-26-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/2128-34-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/4516-5-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/4516-14-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/4516-4-0x00000000750A2000-0x00000000750A3000-memory.dmp

Filesize
4KB

Download
memory/4516-3-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/4516-2-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download
memory/4516-0-0x00000000750A2000-0x00000000750A3000-memory.dmp

Filesize
4KB

Download
memory/4516-1-0x00000000750A0000-0x0000000075651000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads