remcos | 87422011d60613bf2f591057dd05fea2b896d56c5781b1875f1728b471b9d549

Analysis

max time kernel
94s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
11/09/2024, 15:28

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General

Target

daa6fc9ce47213d49ba91a8b78a80757_JaffaCakes118.dll
Size

331KB
MD5

daa6fc9ce47213d49ba91a8b78a80757
SHA1

f59089791f289f0d2ec3b5729ef46827f4fa6d41
SHA256

87422011d60613bf2f591057dd05fea2b896d56c5781b1875f1728b471b9d549
SHA512

9a716152086a13d1c2e6ad16d35304e9260cec4982b7220d5a6ed41694fbddfa87c050892604141e6e7c4016af0761781e308787d14aa9ff31a80d4d8b270157
SSDEEP

6144:cCFNcE5fx1TYK4xkv/BugEm4QrxcTq670nCGQktzJwZkiZalKRDw9:9NcE5fT54xkv/B34Qi240SktzJbipG9

Score

10^/10

remcos hot defense_evasion discovery persistence privilege_escalation rat

Malware Config

Extracted

Family

remcos

Version

2.7.1 Pro

Botnet

HOT

boot.awsmppl.com:2266

coolta71.com:2266

coolta1.xzy:2266

coolta2.xzy:2266

coolget1.xzy:2266

coolcc1.xzy:2266

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
dop.dt
keylog_flag
false
keylog_folder
coss
keylog_path
%AppData%
mouse_option
false
mutex
hotter-O8I6NR
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

Abuse Elevation Control Mechanism: Bypass User Account Control 1 TTPs 1 IoCs

UAC Bypass Attempt via SilentCleanup Task.

defense_evasion privilege_escalation

Bypass User Account Control

T1548.002

pid	Process
1552	schtasks.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-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Mvnb = "C:\\Users\\Admin\\AppData\\Local\\bnvM.url"	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
4420	4476	WerFault.exe	91

System Location Discovery: System Language Discovery 1 TTPs 9 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	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Notepad.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ieinstal.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
1004	reg.exe
4952	reg.exe
2072	reg.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4476	ieinstal.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2576	2168	rundll32.exe	83
PID 2168 wrote to memory of 2576	2168	rundll32.exe	83
PID 2168 wrote to memory of 2576	2168	rundll32.exe	83
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84
PID 2576 wrote to memory of 2228	2576	rundll32.exe	84

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\daa6fc9ce47213d49ba91a8b78a80757_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\daa6fc9ce47213d49ba91a8b78a80757_JaffaCakes118.dll,#1
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2576
- - C:\Windows\SysWOW64\Notepad.exe
    "C:\Windows\System32\Notepad.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2228
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Public\Natso.bat
      4⤵
      System Location Discovery: System Language Discovery
      PID:1648
    - - C:\Windows\SysWOW64\reg.exe
        
        reg delete hkcu\Environment /v windir /f
        5⤵
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:4952
    - - C:\Windows\SysWOW64\reg.exe
        
        reg add hkcu\Environment /v windir /d "cmd /c start /min C:\Users\Public\x.bat reg delete hkcu\Environment /v windir /f && REM "
        5⤵
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:2072
    - - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks /Run /TN \Microsoft\Windows\DiskCleanup\SilentCleanup /I
        5⤵
        Abuse Elevation Control Mechanism: Bypass User Account Control
        System Location Discovery: System Language Discovery
        
        PID:1552
    - - C:\Windows\SysWOW64\reg.exe
        
        reg delete hkcu\Environment /v windir /f
        5⤵
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:1004
  - - C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Public\Natso.bat
      4⤵
      System Location Discovery: System Language Discovery
      PID:3204
- - C:\Program Files (x86)\internet explorer\ieinstal.exe
    "C:\Program Files (x86)\internet explorer\ieinstal.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4476
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4476 -s 152
      4⤵
      Program crash
      PID:4420

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4476 -ip 4476
1⤵
PID:944

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

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Modify Registry

T1112

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Public\Natso.bat

Filesize
283B

MD5
5cc1682955fd9f5800a8f1530c9a4334

SHA1
e09b6a4d729f2f4760ee42520ec30c3192c85548

SHA256
5562cc607d2f698327efacc4a21bd079bb14a99b03e7a01b3c67f8440e341cb3

SHA512
80767263aad44c739236161d4338d5dd8b0b58613f22cd173c3e88ebf143220ee56bbf93ace69a07d3c2f00daff0adbaa8461a1d53d12699725395c931c43cb6

Download Submit
memory/2228-2-0x0000000000990000-0x0000000000991000-memory.dmp

Filesize
4KB

Download
memory/2228-1-0x00000000008D0000-0x00000000008D1000-memory.dmp

Filesize
4KB

Download
memory/2228-246-0x0000000050480000-0x000000005049A000-memory.dmp

Filesize
104KB

Download
memory/2228-293-0x0000000050480000-0x000000005049A000-memory.dmp

Filesize
104KB

Download
memory/4476-251-0x0000000000910000-0x0000000000911000-memory.dmp

Filesize
4KB

Download
memory/4476-258-0x0000000000970000-0x0000000000971000-memory.dmp

Filesize
4KB

Download
memory/4476-259-0x0000000010540000-0x0000000010565000-memory.dmp

Filesize
148KB

Download
memory/4476-261-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4476-272-0x0000000010540000-0x0000000010565000-memory.dmp

Filesize
148KB

Download
memory/4476-273-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads