remcos | 5cac3d994fcc5eefdaef9ffd6b9fae41dd49f1a699e88746e17fb51a49f73bd2

General

Target

d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe
Size

236KB
MD5

d00447a4ef5a375f9b98fb966025b3f2
SHA1

4255d9b7a135c14362eb7a52b40abf02a2f1997b
SHA256

5cac3d994fcc5eefdaef9ffd6b9fae41dd49f1a699e88746e17fb51a49f73bd2
SHA512

9044f4d2474df628472d09d856bed76cc3b53807a623242f6878e287bb048f4402979aa71ddbbdb46ee204969de9e97587adb761d72726babe8cbafd69e65e10
SSDEEP

3072:6ge632NoBADcJqNQJebIV7OWGbBp8rF6201M/nd8aM:6i32PDcAm7V7OWGIZ6Snd8p

Score

10^/10

remcos windowsdefender discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

WindowsDefender

C2

top.fishingjoco.waw.pl:9334

top.fishingjoco.waw.pl:8152

top.fishingjoco.waw.pl:8153

sub.jofishingco.waw.pl:8153

sub.jofishingco.waw.pl:9334

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
defender.exe
copy_folder
Windows Defender
delete_file
true
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
defender
keylog_path
%AppData%
mouse_option
false
mutex
WindowsDefender-OFO9TZ
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Windows Defender
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

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-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
3156	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4388	defender.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows Defender\\defender.exe\""	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows Defender\\defender.exe\""	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows Defender\\defender.exe\""	defender.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows Defender\\defender.exe\""	defender.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
5116	3692	WerFault.exe	82

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	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.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	defender.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000_Classes\Local Settings	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4388	defender.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 3692 wrote to memory of 3156	3692	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe	86
PID 3692 wrote to memory of 3156	3692	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe	86
PID 3692 wrote to memory of 3156	3692	d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe	86
PID 3156 wrote to memory of 4752	3156	WScript.exe	91
PID 3156 wrote to memory of 4752	3156	WScript.exe	91
PID 3156 wrote to memory of 4752	3156	WScript.exe	91
PID 4752 wrote to memory of 4388	4752	cmd.exe	93
PID 4752 wrote to memory of 4388	4752	cmd.exe	93
PID 4752 wrote to memory of 4388	4752	cmd.exe	93
PID 4388 wrote to memory of 2560	4388	defender.exe	94
PID 4388 wrote to memory of 2560	4388	defender.exe	94
PID 4388 wrote to memory of 2560	4388	defender.exe	94

C:\Users\Admin\AppData\Local\Temp\d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d00447a4ef5a375f9b98fb966025b3f2_JaffaCakes118.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:3692
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3156
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Windows Defender\defender.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4752
  - - C:\Users\Admin\AppData\Roaming\Windows Defender\defender.exe
      "C:\Users\Admin\AppData\Roaming\Windows Defender\defender.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4388
    - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
        
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        5⤵
        
        PID:2560
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 3692 -s 980
  2⤵
  - Program crash
  PID:5116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3692 -ip 3692
1⤵
PID:3772

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
646B

MD5
cc8d542019f2f70319bee3d9bee22d94

SHA1
9ed41c0f8d043befcb4e2e485da111c28128d2d1

SHA256
9a978b6fb173202d3da30a402de0f3e982029540a49b7d140ee104e64c965f7d

SHA512
7564d7c65ea9adc0fbbc81bac766242c2d1a13195c7c2af65caaa141721c994ebf39e20400ef0ae03bb52402c34f80de58130cf8607fa1bf83996587b7e303cd

Download Submit
C:\Users\Admin\AppData\Roaming\Windows Defender\defender.exe

Filesize
236KB

MD5
d00447a4ef5a375f9b98fb966025b3f2

SHA1
4255d9b7a135c14362eb7a52b40abf02a2f1997b

SHA256
5cac3d994fcc5eefdaef9ffd6b9fae41dd49f1a699e88746e17fb51a49f73bd2

SHA512
9044f4d2474df628472d09d856bed76cc3b53807a623242f6878e287bb048f4402979aa71ddbbdb46ee204969de9e97587adb761d72726babe8cbafd69e65e10

Download Submit
memory/3692-2-0x00000000001C0000-0x00000000001E0000-memory.dmp

Filesize
128KB

Download
memory/3692-1-0x0000000005B50000-0x0000000005C50000-memory.dmp

Filesize
1024KB

Download
memory/3692-3-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3692-12-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3692-11-0x00000000001C0000-0x00000000001E0000-memory.dmp

Filesize
128KB

Download
memory/3692-10-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-20-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-25-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-17-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-21-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-22-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-23-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-24-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-19-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-26-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-27-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-28-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-29-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-30-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download
memory/4388-31-0x0000000000400000-0x0000000005824000-memory.dmp

Filesize
84.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads