remcos | 0aef5fd40527e7ab78039802a026b1268a330c6580eb1b5bb11ae29137de3d2c

General

Target

c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Size

776KB
MD5

c541ef92d5024981da22c4cd0a7884be
SHA1

554c2af624c1d1f36d522bbdad0860cc05e4fb31
SHA256

0aef5fd40527e7ab78039802a026b1268a330c6580eb1b5bb11ae29137de3d2c
SHA512

89059237ff2d332016b9ed49946b31042be61a349b53a4a415e18ab67976d3c12ecfdd9b6311162b56d6d82dd8807cdda4bf43e3fff263af60cb8cb4343eab8f
SSDEEP

12288:8XV1Vt7syT8RJJ58bOZmZHGGPVo5yOnperQvBXtvldA93LYzxOd6:8nVtYyKp2zPPOpXvBXtvlg0Ad6

Score

10^/10

remcos remotehost-5778 discovery evasion execution persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

3.1.4 Pro

Botnet

RemoteHost-5778

C2

5778.hopto.org:5778

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
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-8NVW4R
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
notepad;solitaire;

Signatures

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

Windows security bypass 2 TTPs 3 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2840	powershell.exe
2912	powershell.exe
2104	powershell.exe

Windows security modification 2 TTPs 4 IoCs

evasion trojan

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Exclusions\Paths\C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe = "0"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\AEr4m1E69bc29s = "C:\\Windows\\Resources\\Themes\\E4GaIu5fec68eP8\\svchost.exe"	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 596 set thread context of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
File opened for modification	C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.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 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	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2840	powershell.exe
2912	powershell.exe
2104	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	2104	powershell.exe
Token: SeDebugPrivilege	2912	powershell.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2620	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2620	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2620	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 596 wrote to memory of 2912	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	31
PID 596 wrote to memory of 2912	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	31
PID 596 wrote to memory of 2912	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	31
PID 596 wrote to memory of 2912	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	31
PID 596 wrote to memory of 2104	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	33
PID 596 wrote to memory of 2104	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	33
PID 596 wrote to memory of 2104	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	33
PID 596 wrote to memory of 2104	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	33
PID 596 wrote to memory of 2840	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	35
PID 596 wrote to memory of 2840	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	35
PID 596 wrote to memory of 2840	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	35
PID 596 wrote to memory of 2840	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	35
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37
PID 596 wrote to memory of 2620	596	c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe	37

C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe"
1⤵
- Windows security bypass
- Windows security modification
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:596
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2912
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2104
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Resources\Themes\E4GaIu5fec68eP8\svchost.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2840
- C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\c541ef92d5024981da22c4cd0a7884be_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  PID:2620

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

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

Impair Defenses

2

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

System Information Discovery

1

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
bbd76131511349ce3d5ecec72493e044

SHA1
82369a7d9eacdcf81ffec3dcf530bd1413db7f4f

SHA256
3b6a8866967d35679c814a83f2228286dcf13202108cd0b31ff3720692ad3122

SHA512
5b6bd6de4e18e27df0ba966d52bcf40d47962320e722207f1136f3df7339de9213ec550c6974947932cc05d1cc9ec361d09053b885e4003c8d6f806e6d7fb297

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

Filesize
286B

MD5
e077391405e0afeda0d4013f523ee278

SHA1
8e85eb3e637983cb2316d313746253747ca9f4e5

SHA256
5ea8c191c54fd31107799c6739ba83a9435d8e58217a5823d53d3dab23bf5cee

SHA512
84f6bfd8a759fc5f30bd8e2738d31968a4ca4338d8c25a5f8eaa7b96289ec7406ba1b2f33c1d856d449855e534e8332c364fcf36573bd9a9a55ded332fa35391

Download Submit
memory/596-36-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/596-1-0x0000000000C70000-0x0000000000D38000-memory.dmp

Filesize
800KB

Download
memory/596-2-0x0000000004ED0000-0x0000000004F92000-memory.dmp

Filesize
776KB

Download
memory/596-3-0x0000000074650000-0x0000000074D3E000-memory.dmp

Filesize
6.9MB

Download
memory/596-0-0x000000007465E000-0x000000007465F000-memory.dmp

Filesize
4KB

Download
memory/2620-31-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-23-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-33-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

Filesize
4KB

Download
memory/2620-35-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-26-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-34-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-21-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-19-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-37-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2620-17-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads